Q48SD DELTA | Alldatasheet
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DS_Q48SD12025_05032012
FEATURES
High efficiency: 95.7% @12V/25A Size: Without Heat spreader: 58.4mm x 36.8mm x 11.2mm With heat spreader: 58.4mm x 36.8mm x 12.7mm PMBus Rev.1.2 compliance Industry standard, DOSA compliant pin out Can be connected in parallel directly Active current sharing Fixed frequency operation Input UVLO, Output OCP & OVP, OTP Monotonic startup into normal and Pre-biased loads 2250V Isolation and basic insulation No minimum load required ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada) to be recognized
APPLICATIONS
Telecom / DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment OPTIONS Digital PMBus interface Active Current sharing Trim Positive On/Off logic With heatspreader Short pin lengths available Delphi Series Q48SD Quarter Brick Family Full Digital Control DC/DC Power Modules: 48V in, 12V/25A out The Delphi Series Q48SD, 36~75V input, isolated single output, Quarter Brick, are full digital control DC/DC converters, and are the latest offering from a world leader in power systems technology and manufacturing ― Delta Electronics, Inc. The Q48SD series provide up to 400 watts of power in an industry standard, DOSA compliant footprint and pin out; the typical efficiency is 96% at 48V input, 12V output and 33A load. There is a built-in digital PWM controller in the Q48SD series, which is used to complete the Vo feedback, PWM signal generation, active current sharing, fault protection, and PWBUS communications, and so on. With the digital control, many design and application flexibility, advanced performance, and reliability are obtained; and the Q48SD series can be connected in parallel directly for higher power without add external oring-fet.
DS_Q48SD12025_05032012 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS Q48SD12025 (Standard) Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc On/off Pin Voltage -50 50 V Other Pin Voltage Trim/Current Sharing, C2, Data, SMBAlert, Clock, Addr1 Addr0 -0.3 3.6 V Operating Ambient Temperature -40 85 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc INPUT CHARACTERISTICS Operating Input Voltage 36 75 Vdc Input Under-Voltage Lockout Turn-On Voltage Threshold 32.5 34 35.5 Vdc Turn-Off Voltage Threshold 30.5 32 33.5 Vdc Lockout Hysteresis Voltage 1 2 3 Vdc Maximum Input Current Vin=36V, 100% Load, 8.3 8.5 A No-Load Input Current 75 110 mA Off Converter Input Current 18 23 mA Inrush Current(I2t) With 100uF external input capacitor 1 A2s Start up Current Peak, Vin=36V, 100% Load, With 5000uF Co 8.3 12 A Input Terminal Ripple Current RMS, With 100uF input cap. 0.24 0.36 A Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 10 mA Input Voltage Ripple Rejection 120 Hz 50 dB OUTPUT CHARACTERISTICS Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 11.8 12 12.2 Vdc Output Voltage Regulation Over Load Io=Io,min to Io,max 20 45 mV Over Line Vin=38.5V to 75V 20 45 mV Over Temperature Tc=-40°C to 125°C ±120 mV Total Output Voltage Range over sample load, and temperature, from 38~75V Vin 11.8 12 12.4 V over sample load, and temperature, from 36~75V Vin 11.2 12 12.4 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 100 200 mV RMS Full Load, 1µF ceramic, 10µF tantalum 40 80 mV Operating Output Current Range Full input voltage range 0 25 A Output DC Current-Limit Inception Output Voltage 10% Low 110 150 % DYNAMIC CHARACTERISTICS Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs Positive Step Change in Output Current 50% Io.max to 75% Io.max 200 400 mV Negative Step Change in Output Current 75% Io.max to 50% Io.max 200 400 mV Setting Time (within 1% Vout nominal) 300 µs Turn-On Transient Start-Up Time, From On/Off Control 40 50 ms Start-Up Time, From Input 50 60 ms Output Capacitance 220 16000 µF EFFICIENCY 100% Load Vin=48V 94.7 95.7% % 60% Load Vin=48V 94.7 95.7% % ISOLATION CHARACTERISTICS Input to Output 2250 Vdc Isolation Resistance 10 M Ω Isolation Capacitance 1500 pF FEATURE CHARACTERISTICS Current sharing accuracy 10 % Switching Frequency 130 kHz ON/OFF Control, Negative Remote On/Off logic Logic Low (Module On) Von/off -0.7 0.8 V Logic High (Module Off) Von/off 2.4 50 V ON/OFF Control, Positive Remote On/Off logic Logic Low (Module Off) Von/off -0.7 0.8 V Logic High (Module On) Von/off 2.4 50 V ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.5 mA ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=2.4V 10 µA Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 50 µA Output Voltage Trim Range Vin=48V, Pout max rated power≦ -20 10 % Output Over-Voltage Protection Over full temp range; % of nominal Vout 14 17 V PMBus Signal Interface Characteristics Logic Input Low (VIL) C2, Data, SMBAlert, Clock pin 0 0.8 V Logic Input High (VIH) C2, Data, SMBAlert, Clock pin 2.1 3.3 V Logic Onput Low (VOL) C2, Data, SMBAlert, Clock pin; IOL=6mA 0.4 V Logic Onput High (VOH) C2, Data, SMBAlert, Clock pin; I OH=-6mA 2.6 V PMBus Operating Frequency Range 100 400 KHz
DS_Q48SD12025_05032012 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS Q48SD12025 (Standard) Min. Typ. Max. Units PMBus Monitoring CHARACTERISTICS Output Current Reading Accuracy Io=50% ~ 100% of Io, max; -5 +5 % Io=5% ~ 50% of Io, max; -2 +2 A Output Voltage Reading Accuracy -2 +2 % Input Voltage Reading Accuracy -4 +4 % Temperature Reading Accuracy -5 +5 ℃ GENERAL SPECIFICATIONS MTBF Io=100% of Io, max; 300LFM; Ta=25°C TBD M hours Weight Without heat spreader 52.5 grams Weight With heat spreader 66.5 grams Over-Temperature Shutdown ( Without heat spreader) Refer to Figure 22 for Hot spot 1 location (48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-) 128 °C Over-Temperature Shutdown (With heat spreader) Refer to Figure 24 for Hot spot 2 location (48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-) 120 °C Over-Temperature Shutdown ( NTC resistor ) Refer to Figure 22 for NTC resistor location 125 °C Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference. PIN DEFINATION Pin# Name Function Pin# Name Function
1 Vin(+) 7 C2
Secondary on/off control pin; The default configuration is set to ignore this input. And such pin can be reconfigured by the PMBus Interface.
2 ON/OFF Primary on/off control pin 8 Sig_Gnd Signal ground
3 Vin(-) 9 Data PMBus data line
4 Vo(-) 10 SMBAlert PMBus SMBAlert line
/Current sharing Trim pin or current sharing pin, which is option.
11 Clock PMBus clock line
6 Vo(+) 12 Addr1 ADDR1 pin sets the high order digit of the address. 13 Addr0 ADDR0 pin sets the low order digit of the address. SIMPLIFIED APPLICATION CIRCUIT Vout(+) Trim/ Current sharing Addr0 Addr1 Vout(-) Vin(+) Vin(-) On/off Delta DC/DC Module EMI filter Reverse polarity Protection Fuse LoadInput Source System MCU CLOCK DATA C2 SMB -ALERT CLK DATA CTRLALERT On/off control Vout(+) Trim/ Current sharing Addr0 Addr1 Vout(-) Vin(+) Vin(-) On/off Delta DC/DC Module EMI filter Reverse polarity Protection Fuse LoadInput Source System MCU CLOCK DATA C2 SMB -ALERT CLK DATA CTRLALERT On/off control
DS_Q48SD12025_05032012 Safety Considerations The power module must be installed in compliance with the spacing and separation requirements of the end-user’s safety agency standard, i.e., UL60950-1, CSA C22.2 NO. 60950-1 2nd, IEC 60950-1 2nd : 2005, EN 60950-1 2nd: 2006+A11+A1: 2010, if the system in which the power module is to be used must meet safety agency requirements. Basic insulation based on 75 Vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this DC-to-DC converter is identified as TNV-2 or SELV. An additional evaluation is needed if the source is other than TNV-2 or SELV. When the input source is SELV circuit, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met: The input source must be insulated from the ac mains by reinforced or double insulation. The input terminals of the module are not operator accessible. A SELV reliability test is conducted on the system where the module is used , in combination with the module, to ensure that under a single fault, hazardous voltage does not appear at the module’s output. When installed into a Class II equipment (without grounding), spacing consideration should be given to the end-use installation, as the spacing between the module and mounting surface have not been evaluated. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a Fast-acting fuse with 30A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient energy and maximum input current. Soldering and Cleaning Considerations Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta’s technical support team. DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few µH, we advise adding a 100 to 200 µF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability. Layout and EMC Considerations Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Below TBD is the reference design for an input filter tested with Q48SD12025XXXX to meet class B in CISSPR 22.
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-current protection circuit. If the output current exceeds the OCP set point, the modules will shut down, and enter hiccup mode or latch mode. For hiccup mode, the module will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected. For latch mode, the module will shut down and not attempt to restart. The latch is reset by either cycling the input power or by toggling the primary on/off signal for one second. The OCP threshold and protection mode can be reconfigured by the PMBus Interface; the default configuration is hiccup mode. Over-Voltage Protection The modules include an internal output over-voltage protection circuit. If output voltage exceeds the over-voltage set point, the module will shut down, and enter in hiccup mode or latch mode. For hiccup mode, the module will try to restart after shutdown. If the output overvoltage condition still exists, the module will shut down again. This restart trial will continue until the over-voltage condition is corrected. For latch mode, the module will shut down and not attempt to restart. The latch is reset by either cycling the input power or by toggling the primary on/off signal for one second. The Vo OVP threshold and protection mode can be reconfigured by the PMBus Interface; The default configuration is hiccup mode. Over-Temperature Protection The modules include an internal over-temperature protection circuit. If the module temperature exceeds the over-temperature threshold the module will shut down, and enter in auto-recovery mode or latch mode. For auto-recovery mode, the module will monitor the module temperature after shutdown. Once the temperature is dropped and within the specification, the module will be auto-recovery. For latch mode, the module will shut down and not attempt to restart. The latch is reset by either cycling the input power or by toggling the primary on/off signal for one second. The OTP threshold and protection mode can be reconfigured by the PMBus Interface; The default configuration is hiccup mode. Primary Remote On/Off The primary remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off durin g a logic low. The primary remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain. If the remote on/off feature is not used, for negative logic, please short the on/off pin to Vi(-); For positive logic, please leave the on/off pin floating. The module will not response to the remote on/off signal which is less than 120us. The primary remote on/off logic can be reconfigured by the PMBus Interface. R Load Vi(-) Vi(+) ON/OFF Vo(-) Vo(+) R Load Vi(-) Vi(+) ON/OFF Vo(-) Vo(+) Vi(-) Vi(+) ON/OFF Vo(-) Vo(+) Figure 17: Remote on/off implementation Secondary Remote On/Off Reference to the Vo(-) terminal, there is a C2 pin. The default configuration is set to ignore this input. And such pin can be reconfigured as secondary remote on/off pin by the PMBus interface including either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low. The secondary remote on/off can be controlled by an external switch between the on/off terminal and the Vo(-) terminal. The switch can be an open collector or open drain. Parallel and Active Current Sharing The modules are capable of operating in parallel, and realizing current sharing by active current sharing method. The current sharing pin of parallel module are connected together to create a current sharing bus; in this case, so called “Max Current” current sharing bus method is employed. The module with the max output current will be the master module automatically, and it’s output current signal will be sent to the current sharing pin as the current sharing bus signal. The rest module with the lower output current will be the slave module, which will adjust their output voltage in order to bring their output current increasing to the required current by the current sharing bus signal. The current sharing accuracy equation is: X% = | Io – ( Itotal / N ) | / Irated, Where, Io is the output current of per module; Itotal is the total load current; N is parallel module numbers; Irated is the rated full load current of per module.
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) If system has no redundancy requirement, the module can be parallel directly for higher power without adding external oring-fet; whereas, If the redundancy function is required, the external oring-fet should be added. Vin+ Vin- On/off Vo+ Vo- Current Sharing Module I Vin+ Vin- On/off Vo+ Vo- Module II Current Sharing Vin Load Vin+ Vin- On/off Vo+ Vo- Current Sharing Module I Vin+ Vin- On/off Vo+ Vo- Module II Current Sharing Vin Vin+ Vin- On/off Vo+ Vo- Current Sharing Module I Vin+ Vin- On/off Vo+ Vo- Module II Current Sharing Vin Load Figure 18: Parallel and active current sharing configuration for no redundancy requirement system In order to keep the good stability of the parallel system, below layout guideline should be followed: 1. The trace connected the current sharing pin of Module I and Module II should be as short as possible. 2. The layout loop from Module I current sharing pin to Module II current sharing pin, to Module II Vo- pin, and come back to Module I Vo- pin should be as small as possible. 3. The dc voltage drop from Module I Vo- pin to Module II Vo- pin should be as small as possible. PMBus Communication The module has a digital PMBus interface to allow the module to be monitored, controlled and configured by the system. The module supports 4 PMBus signal lines, Data, Clock, SMBALERT (optional), Control (C2 pin, optional), and 2 Address line Addr0 and Addr1. More detail PMBus information can be found in the PMB Power Management Protocol Specification, Part I and part II, revision 1.2; which is shown in http://pmbus.org Both 100kHz and 400kHz bus speeds are supported by the module. Connection for the PMBus interface should be following the High Power DC specifications given in section 3.1.3 in the SMBus specification V2.0 or the Low Power DC specifications in section 3.1.2. The complete SMBus specification is shown in http://smbus.org The module supports the Packet Error Checking (PEC) protocol. It can check the PEC byte provided by the PMBus master, and include a PEC byte in all message responses to the master. And the module also can communicate with the master that does not implement the PEC mechanism. SMBALERT protocol is also supported by the module. SMBALERT line is a wired-AND signal just as the CLOCK and DATA signals; by which the module can alert the PMBus master that it has an active status or alarm condition via pulling the SMBALERT pin to an active low. There are two ways that the master and the module response to the alert o f SMBALERT line. One way is for the module used in a system that does not support ARA. The factory default state for the module is to retain it’s resistor programmed address, when it is in an ALERT active condition, and not respond to the ARA. The master will communicate with the slave module using the programmed address, and using the various READ_STATUS commands to find who cause for the SMBALERT. The CLEAR_FAULTS command will clear the SMBALERT. The other way is for the module used in a system that does support ARA. Bit 4 of the MFR_ARA_CONFIG command can be used to reconfigure the module to utilize Alert Response Address (ARA). In this case, the module will no longer respond to its programmed address. The master simultaneously accesses all SMBALERT devices ARA; only the device which pulled SMBALERT low will acknowledge the ARA. The master is expected to perform the modified received byte operation to get the address of the alert slave, and retire the SMBALERT active signal. And then, the alter slave will return to it’s resistor programmed address, allowing normal master-slave communications to proceed. If more than one device pulls SMBALERT line low, the lowest address device will win communication rights via standard arbitration during the slave address transfer. After acknowledging the slave address the device must disengage its SMBALERT pulldown. If the master still sees SMBALERT line low when the message transfer is complete, it knows to read the ARA again. The module contains a data flash used to store configuration settings, which will not be programmed into the device data flash automatically. The STORE_DEFAULT_ALL command must be used to commit the current settings are transfer from RAM to data flash as device defaults. PMBUS Addressing The Module has flexible PMBUS addressing capability. When connect different resistor from Addr0 and Addr1 pin to GND pin, 64 possible addresses can be acquired. The address is in the form of octal digits; Each pin offer one octal digit, and then combine together to form the decimal address as shown in below. Address = 8 * ADDR1 + ADDR0
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) Corresponded to each octal digit, the requested resistor values are shown in below, and +/-5% resistors accuracy can be accepted. If there is any resistances exceeding the requested range, address 127 will be return. 0-12 and 40, 44, 45, and 55 in decimal address can’t be used, since they are reserved according to the SMBus specifications, and which will also return address 127. Octal digit Resistor(Kohm) 0 10 1 15.4 2 23.7 3 36.5 4 54.9 5 84.5 6 130 7 200 PMBus Data Format The module receives and report date in LINEAR format. The Exponent of the data words is fixed at a reasonable value for the command; altering the exponent is not supported. DIRECT format is not supported by the module. For commands that set or report any voltage thresholds related to the output voltage, the module supports the linear data format consisting of a two byte value with a 16-bit, unsigned mantissa, and a fixed exponent of -12. The format of the two data bytes is shown below: The equation can be written as: Vout = Mantissa x 2-12 For example, considering set Vout to 12V by VOUT_COMMAND, the read/write data can be calculated refer to below process: 1. Mantissa =Vout/2 -12= 12/2-12=49152; 2. Converter the calculated Mantissa to hexadecimal 0xC000. For commands that set or report all other thresholds, including input voltages, output current, temperature, time and frequency, the supported linear data format is a two byte value with: an 11 bit, two’s complement mantissa , and a 5 bit, two’s complement exponent (scaling factor).The format of the two data bytes is shown as in below. The equation can be written as: Value = Mantissa x 2exponent For example, considering set the turn on threshold of input under voltage lockout to 34V by VIN_ON command; the read/write data can be calculated refer to below process: 1. Get the exponent of Vin, -3; whose binary is 11101 2. Mantissa =Vin/2 -3=34/2-3=272; 3. Converter the calculated Mantissa to hexadecimal 110, then converter to binary 00100010000; 4. Combine the exponent and the mantissa, 11101 and 00100010000; 5. Converter binary 1110100100010000 to hexadecimal E910. The detail exponent and resolution of main parameter is summarized as below: Exponent Resolution Vin -3 0.125V Vo -12 0.244mV Io -4 62.5mA Temperature -2 / Switching requency -2 0.25Khz Time -1 0.5ms Supported PMBus Commands The main PMBus commands described in the PMBus 1.2 specification are supported by the module. Partial PMBus commands are fully supported; Partial PMBus commands have difference with the definition in PMBus 1.2 specification. All the supported PMBus commands are detail summarized in below table.
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) Command Command Code Command description Transf -er type Compatible with standard PMBUS or not? Data Format Default value Range limit Data units Expon -ent Note OPERATION 0x01 Turn the module on or off by PMBUS command R/W byte Refer to below description; Bit field 0x80 / / / / ON_OFF_CONFIG 0x02 Configures the combination of primary on/off pin and PMBUS command R/W byte Refer to below description; Bit field 0x1D (Neg Logic); 0x1F (Pos Logic); / / / / CLEAR_FAULTS 0x03 Clear any fault bits that have been set Send byte Yes / / / / / / STORE_DEFAULT_ALL 0x11 Stores operating parameters from RAM to data flash Send byte Yes / / / / / This command is effective to the parameter of all command in the table. RESTORE_DEFAULT_ALL 0x12 Restores operating parameters from data flash to RAM Send byte Yes / / / / / This command can't be issued when the power unit is running. VOUT_MODE 0x20 To read Vo data format Read byte Yes mode+ exp 0x14 / / / / VOUT_COMMAND 0x21 Set the output voltage R/W word Yes Vout Linear 9.6 ~13.2 Volts -12 / FREQUENCY_SWITCH 0x33 Set the switching frequency R/W word Yes Freque ncy Linear 130 120 ~140 KHz -2 / VIN_ON 0x35 Set the turn on voltage threshold of Vin under voltage lockout R/W word Yes Vin Linear 34 32~46 V -3 VIN_ON should be higher than VIN_OFF, and keep 2V hystersis. VIN_OFF 0x36 Set the turn off voltage threshold of Vin under voltage lockout R/W word Yes Vin Linear 32 32~46 V -3 VIN_ON should be higher than VIN_OFF, and keep 2V hystersis. VOUT_OV_FAULT_LIMIT 0x40 Set the output overvoltage fault threshold. R/W word Yes Vout Linear 15 11~16 V -12 Must be higher than the value of VOUT_COMMAND and VOUT_OV_WARN_LIMIT;
DS_Q48SD12025_05032012 Command Command Code Command description Transf -er type Compatible with standard PMBUS or not? Data Format Default value Range limit Data units Expon -ent Note VOUT_OV_FAULT_RESP ONSE 0x41 Instructs what action to take in response to an output overvoltage fault. R/W byte Refer to below description; Bit field 0xB8 / N/A / / VOUT_OV_WARN_LIMIT 0x42 Set a threshold causing an output voltage high warning. R/W word Yes Vout Linear 15 11~16 V -12 Must be less than VOUT_OV_FAULT_LIMIT value IOUT_OC_FAULT_LIMIT 0x46 Set the output overcurrent fault threshold. R/W word Yes Iout Linear 33 20~60 A -4 Must be greater than IOUT_OC_WARN_LIMIT value IOUT_OC_FAULT_RESPO NSE 0x47 Instructs what action to take in response to an output overcurrent fault. R/W byte Refer to below description; Bit field 0xF8 / N/A / / IOUT_OC_WARN_LIMIT 0x4A Set a threshold causing an output current high warning. R/W word Yes Iout Linear 28 10~40 A -4 Must be less than IOUT_OC_FAULT_LIMIT value OT_FAULT_LIMIT 0x4F Set the over temperature fault threshold. R/W word Yes TEMP Linear 125 25~140 Deg.C -2 Must be greater than OT_WARN_LIMIT value OT_FAULT_RESPONSE 0x50 Instructs what action to take in response to an over temperature fault. R/W byte Refer to below description; Bit field 0xB8 / N/A / / OT_WARN_LIMIT 0x51 Set a threshold causing a temperature high warning. R/W word Yes TEMP Linear 115 25~125 Deg.C -2 Must be less than OT_FAULT_LIMIT value VIN_OV_FAULT_LIMIT 0x55 Set the input overvoltage fault threshold. R/W word Yes Vin Linear 110 48~110 V -3 / POWER_GOOD_ON 0x5E Sets the output voltage at which the bit 3 of STATUS_WORD high byte should be asserted. R/W word Yes Vout Linear 8.1 ~13.2 V -12 Must be greater than POWER_GOOD_OFF value by 1.6V POWER_GOOD_OFF 0x5F Sets the output voltage at which the bit 3 of STATUS_WORD high byte should be negated. R/W word Yes Vout Linear 8.1 ~13.2 V -12 Must be less than POWER_GOOD_ON value by 1.6V TON_DELAY 0x60 Sets the time from a start condition is received until the output voltage starts to rise R/W word Yes Time Linear 7 5~500 ms -1 /
DS_Q48SD12025_05032012 Command Command Code Command description Transf -er type Compatible with standard PMBUS or not? Data Format Default value Range limit Data units Expon -ent Note TON_RISE 0x61 Sets the time from the output starts to rise until the voltage has entered the regulation band. R/W word Yes Time Linear 28 15~500 ms -1 / STATUS_WORD 0x79 Returns the information with a summary of the module's fault/warning Read word Refer to below description; Bit field / / / / / STATUS_VOUT 0x7A Returns the information of the module's output voltage related fault/warning Read byte Refer to below description; Bit field / / / / / STATUS_IOUT 0x7B Returns the information of the module's output current related fault/warning Read byte Refer to below description; Bit field / / / / / STATUS_INPUT 0x7C Returns the information of the module's input over voltage and under voltage fault Read byte Refer to below description; Bit field / / / / / STATUS_TEMPERATURE 0x7D Returns the information of the module's temperature related fault/warning Read byte Refer to below description; Bit field / / / / / STATUS_CML 0x7E Returns the information of the module's communication related faults. Read byte Refer to below description; Bit field / / / / / READ_VIN 0x88 Returns the input voltage of the module Read word Yes Vin Linear / / Volts / / READ_VOUT 0x8B Returns the output voltage of the module Read word Yes Vout Linear / / Volts / / READ_IOUT 0x8C Returns the output current of the module Read word Yes Iout Linear / / Amps / / READ_TEMPERATURE_1 0x8D Returns the module's hot spot temperature of the module Read word Yes TEMP Linear / / Deg.C / / PMBUS_REVISION 0x98 Reads the revision of the PMBus Read byte Yes Bit field 1.2 / / / /
DS_Q48SD12025_05032012 Command Command Code Command description Transf -er type Compatible with standard PMBUS or not? Data Format Default value Range limit Data units Expon -ent Note MFR_ID 0x99 Read the manufacturer's ID of the module Read block Yes Bit field DELTA / / / ASCII characters; 5 Bytes; MFR_MODEL 0x9A Load and read the manufacturer's model number of the module R/W block Yes Bit field Example: Q48SD12025 NRFA / / / ASCII characters; 14 Bytes; MFR_REVISION 0x9B Load and read the manufacturer's revision number of the module R/W block Yes Bit field Example: S20 / / / ASCII characters; 3 Bytes MFR_LOCATION 0x9C Read manufacturer's location of the module Read block Yes Bit field Thailand / / / ASCII characters; 8 Bytes; MFR_DATE 0x9D Load and read the manufacture date of the module R/W block Yes Bit field Example: 04/12/2012 / / / ASCII characters; 10 Bytes; MFR_SERIAL 0x9E Load and read the serial number of the module R/W block Yes Bit field XXXXXXXXX / / / ASCII characters; 9 Bytes; MFR_FW_REV 0xD1 Read the firmware revision of the module Read byte Refer to below description; Bit field Example: 5062XXXXXX / / / ASCII characters; 10 Bytes; MFR_ ARA_Configure 0xE0 Configure the Alert Response Address (ARA), when SMBLAERT is asserted R/W byte Refer to below description; Bit field 0x00 / / / / MFR_ C2_Configure 0xE1 Configures the C2 pin (secondary on/off pin) function and logic; R/W byte Refer to below description; Bit field 0x00 / / / /
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) OPERATION [0x01] Bit number Purpose Bit Value Meaning Default Settings ， 0x80
1 Output is enabled 7: Enable/Disable the module
0 Output is disabled
6:0 Reserved 0000000 ON_OFF_CONFIG [0x02] Bit number Purpose Bit Value Meaning Default Settings， 0x1D (negative) /0x1F (positive) 7:5 Reserved 000
1 Module does not power up until commanded by
the primary ON/OFF pin and the OPERATION Controls how the unit responds to the primary on/off pin and the OPERATION command; 0 Module power up at any time regardless of the state of the primary ON/OFF pin and the OPERATION
1 Module responds to the 7 bit in the OPERATION 3 Controls how the unit responds to
the OPERATION command 0 Module ignores the 7 bit in the OPERATION
1 Module requires the primary ON/OFF pin to be
asserted to start the unit
2 Controls how the unit
responds to the primary on/off pin
0 Module ignores the state of the primary ON/OFF
1 Positive Logic 1 Control logic of primay on/off pin
0 Negative Logic
0, negative; 1, positive.
0 Unit turn off delay time control 1 Shut down the module with 0 delay cycle 1
VOUT_OV_FAULT_RESPONSE [0x41] Bit number Purpose Bit Value Meaning Default Settings， 0xB8 7:6 Response settings 10 Unit shuts down and responds according to the retry settings
111 Unit continuously restarts while fault is present
5:3 Retry setting
000 Unit does not attempt to restart on fault
2:0 Delay time setting 000 No delay supported 000 IOUT_OC_FAULT_RESPONSE [0x47] Bit number Purpose Bit Value Meaning Default Settings， 0xF8 7:6 Response settings 11 Unit shuts down and responds according to the retry settings 11, 5:3 Retry settings 2:0 Delay time setting 000 No delay supported 000
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) OT_FAULT_RESPONSE [0x50] Bit number Purpose Bit Value Meaning Default Settings， 0xB8 7:6 Response settings 10 Unit shuts down and responds according to the retry settings 10, 5:3 Retry settings 2:0 Delay time setting 000 No delay supported 000 STATUS_WORD [0x79] High byte Bit number Purpose Bit Value Meaning
1 Occurred 7 An output over voltage fault or warning
0 No Occurred
1 Occurred 6 An output over current fault or warning
1 Occurred 5 An input voltage fault, including over voltage and undervoltage
4 Reserved
1 is negated 3 Power_Good 0 OK 2:0 Reserved Low byte Bit number Purpose Bit Value Meaning
7 R e s e r v e d
1 Occurred 6 OFF (The unit is not providing power to the output, regardless of the
reason) 0 No Occurred
1 Occurred 5 An output over voltage fault
1 Occurred 4 An output over current fault
1 Occurred 3 An input under voltage fault
1 Occurred 2 A temperature fault or warning
1 Occurred ； 1 CML (A communications, memory or logic fault ）
0 Reserved
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) STATUS_VOUT [0x7A] Bit number Purpose Bit Value Meaning
1 Occurred ； 7
1 Occurred ； 6 Output over voltage warning
5:0 Reserved STATUS_IOUT [0x7B] Bit number Purpose Bit Value Meaning
6 Reserved
1 Occurred ； 5 Output over current warning
4:0 Reserved STATUS_INPUT [0x7C] Bit number Purpose Bit Value Meaning 6: 5 Reserved
1 Occurred ； 4 Input under voltage fault
3:0 Reserved STATUS_TEMPERATURE [0x7D] Bit number Purpose Bit Value Meaning
1 Occurred ； 6 Over temperature warning
5:0 Reserved
DS_Q48SD12025_05032012 FEATURES DESCRIPTIONS (CON.) STATUS_CML [0x7E] Bit number Purpose Bit Value Meaning Invalid/Unsupported Command Received
1 Occurred ； 6 Invalid/Unsupported Data Received
1 Occurred ； 5 Packet Error Check Failed
4:0 Reserved MFR_ ARA_Configure [0xE0] Bit number Purpose Bit Value Meaning Default Settings ， 0x00 7:5 Reserved 000
1 ARA functional, module responds to ARA only, when
0 ARA not functional, module remains at resistor
programmed address, when SMBLAERT is asserted 3:0 Reserved 0000 MFR_ C2_Configure [0xE1] Bit number Purpose Bit Value Meaning Default Settings ， 0x00 7:2 Reserved 000000
1 AND – Primary and Secondary side on/off 1
Configuration 0 C2 is ignored
1 Positive Logic 0 Secondary side on/off
DS_Q48SD12025_05032012 MECHANICAL DRAWING (WITH HEAT SPREADER) *For modules with through-hole pins and the optional heat spreader, they are intended for wave soldering assembly onto system boards, please do not subject such modules through reflow temperature profile.
DS_Q48SD12025_05032012 MECHANICAL DRAWING (WITHOUT HEAT SPREADER) Pin Specification: Pins 1-3&5 1.00mm (0.040”) diameter (All pins are copper with matte Tin plating over Nickel under plating) Pins 4 &6 1.50mm (0.060”) diameter (All pins are copper with matte Tin plating over Nickel under plating) Pins 7-13 SQ 0.50mm(0.020’’) ( All pins are copper with gold flash plating)
DS_Q48SD12025_05032012 PART NUMBERING SYSTEM Q 48 S D 120 25 N R F A Type of Product Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length /Type Option Code Current sharing pin Trim pin PMBus pin Heat spreader A Y N Y N BN Y N N C N Y N Y HY N Y Y Quarter Brick 48- 36~75V S- Single D – Full digital control 120 - 12V 25- 25A N - Negative K – 0.110’’ N - 0.145” R - 0.170” C - 0.181” S - 0.189” T - 0.220” L - 0.248” F- RoHS 6/6 (Lead Free) G N Y Y Y MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD Q48SD12025NRFA 36V~75V 9A 12V 25A 95.7% Default remote on/off logic is negative and pin length is 0.170” For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales office CONTACT: www.delta.com.tw/dcdc USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Email: DCDC@delta-corp.com Europe: Telephone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.tw Asia & the rest of world: Telephone: +886 3 4526107 x 6220~6224 Fax: +886 3 4513485 Email: DCDC@delta.com.tw WARRANTY Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta. Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice.