AP3102 DIODES | Alldatasheet
Document overview
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Technical content
Features
Bi-CMOS Process with Excellent Performance Very Low Start-up Current: 5μA Typical Current Mode Control Non-audible-noise Green Mode Control Frequency Foldback for High Average Efficiency Internal Slope Compensation Programmable Brownout Protection Programmable Line Compensation Useful Pin Fault Protection: SENSE Pin Floating RI Pin Short to Ground RI Pin Floating Smart Latch/Auto-recoverable Protection Option Comprehensive Protection Feature: VCC Over Voltage Protection (VOVP) Line Over Voltage Protection (LOVP) Over Temperature Protection (OTP) Over Load Protection (OLP) Internal Soft Start Function During Start-up 500mA Gate Output Current Capability Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) SO-8
Applications
Switching AC-DC Adapter LCD Monitor/TV Power Open Frame Switching Power Supply Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Hal ogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900p pm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. GND FB BOK RI GATE VCC SENSE ADJ
Document number: DS37419 Rev.2 - 2 2 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Typical Applications Circuit R11 5.1k C8 0.1F 47F R12 4.7k R10 20k 2nF R4 20 3.9 R13 620 0.55 7N60 BD1 100k 12V/3A J1 C1 100F U2 P817 AZ431 FR107 R8 27k 2M C7 470 F 8HD3 C10 1000F T 1nF R9 10 ADJ SENSE BOK RI GATE VCC FB GND AP3102 10M 82k 3.3F CX1 6.8nF10nF CY 0.1F VCB 18k 1kR14 For AP3102 Pin Descriptions Pin Number Pin Name Function 1 GND Signal ground. Current return for driver and control circuits 2 FB Feedback. Directly connected to the opto-coupler
3 BOK
Brownout Protection Pin. Connected to a resistor divider from the ground to bulk capacitor for setting the brownout level and line compensation. When the voltage of this pin is lower than 0.5V and lasts 35ms, the PWM signal will be off and system enters the auto recoverable protection mode (hiccup mode). Moreover, this pin is also applied for line OVP (trigger level is 4V) and line compensation (compensate the current sense for over l oad protection.)
4 RI Set the bias current to determine the normal switching frequency
5 ADJ To adjust the level of skip cycle. When its value is greater than 4.5V, the system will be latched
6 SENSE Current sense
7 VCC Supply voltage of driver and control circuits
8 GATE Gate driver output
Document number: DS37419 Rev.2 - 2 3 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Functional Block Diagram GND GATE SENSE Latch LEB Driver 15V QD CLK RB FB R 0.85V ADJ OLP 1.1V OLP OTP VCC 33V 28V RIUVLO 16.2V 8.8V Internal Bias 4.5V Latch 2mS Soft Start 25A OTP 155oC BOK Disable 55k OSC VDD 0.5V 0.9V BOK BOK 1A Disable OVPOVP Protect Logic Latch Control Logic (Note*) OVP OLP Latch Latch OVP Control Logic for AP3102L Control Logic for AP3102V Control Logic for AP3102 Note* Latch OLP OVP
Document number: DS37419 Rev.2 - 2 4 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VCC Power Supply Voltage 30 V IO Gate Output Current 500 mA VFB, VSENSE Input Voltage to FB,SENSE pin -0.3 to 7 V VRI, VADJ Input Voltage to RI, ADJ pin -0.3 to 7 V θJA Thermal Resistance (Junction to Ambient) 186 º C/W PD Power Dissipation and Thermal Characteristic, SENSE at TA<+25ºC 550 mW TJ Operation Junction Temperature -40 to +150 ºC TSTG Storage Temperature Range +150 ºC – ESD (Human Body Model) 2500 V – ESD (Machine Model) 250 V Note 4: Stresses greater than those listed under “Absolute Maximum R atings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Condi tions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability . Recommended Operating Conditions Symbol Parameter Min Max Unit VCC Supply Voltage 10 25 V TA Ambient Operating Temperature Range -40 +85 ºC Electrical Characteristics (VCC =16V, TA=+25° C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit Supply Voltage (VCC Pin) ISTART-UP Start-up Current VCC=14.8V – 5 15 A ICC Operating Supply Current VFB=0V, CL=1nF 1.5 2.5 3.5 mA VFB=3V, CL=1nF 2 3 4 – UVLO (on) – 15.2 16.2 17.2 V – UVLO (off) – 7.8 8.8 9.8 V – VCC OVP – 27 28.5 30 V – VCC Clamp ICC=5mA – – 34 V – De-Latch VCC – 4.5 6 7.5 V PWM Section/Oscillator Section – Maximum Duty Cycle – 70 75 80 – Minimum Duty Cycle – – 0 – – Oscillation Frequency RRI=26k 60 65 70 kHz – Frequency in Skip Mode RRI=26k 22 – – kHz – Frequency Temperature Stability -40oC to +85oC – – 5 % – Frequency Voltage Stability VCC=12V to 30V – – 3 % – Frequency Dithering – – 6 – %
Document number: DS37419 Rev.2 - 2 5 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Electrical Characteristics (VCC =16V, TA=+25° C, unless otherwise specified.) (Cont.) Symbol Parameter Conditions Min Typ Max Unit Current Sense Section (SENSE Pin) VCS Maximum SENSE Voltage VBOK=0.95V 0.75 0.8 0.85 V VBOK=2.76V 0.63 0.68 0.73 – LEB Time of SENSE RRI=26k 150 250 350 ns – Delay to Output – 50 150 250 ns – Soft-start Time RRI=26k – 2 – ms Feedback Input Section (FB Pin) – The Ratio of Input Voltage to Current Sense Voltage – 2.5 3 3.5 V/V – Input Impedance – 3 4.5 6 k – Source Current – – – -2 mA – Input Voltage for Zero Duty VADJ=0V – – 1.2 V Output Section (GATE Pin) – Output Low Level IO=50mA, VCC=12V – – 1 V – Output High Level IO=50mA, VCC=12V 8.5 – – V – Output Clamping – 13 15 17 V – Rising Time CL=1nF, VCC=13V 150 250 350 ns – Falling Time CL=1nF, VCC=13V 30 50 90 ns Brownout Protection (BOK Pin) – Brownout Turn-on – 0.85 0.9 0.95 V – Brownout Turn-off – 0.45 0.5 0.55 – Clamp Voltage on BOK IBOK=1mA 5.5 6.2 6.9 V – Line Compensation Ratio – – 0.055 – – – Line OVP Voltage – 3.5 4 4.5 V Skip Cycle Section (ADJ Pin) – Source Current – 10 25 45 A – Latch Trigger Voltage – 4.2 4.5 4.8 V – Clamp Voltage on ADJ – 4 5 6 V – Input Impedance – 35 50 65 k Over-Temperature Protection Section – Shutdown Temperature – – +155 – oC – Temperature Hysteresis – – +25 – oC Delay Time Section – Delay 1 of Protection RRI=26k, Output short and OLP BOK pin trigger for turning off 25 35 45 ms – Delay 2 of Protection RRI=26k, ADJ, VCC OVP, Line OVP BOK pin trigger for turning on – 25 – s
Document number: DS37419 Rev.2 - 2 6 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT -40 -20 0 20 40 60 80 100 120 15.0 15.2 15.4 15.6 15.8 16.0 16.2 16.4 16.6 16.8 17.0 Ambient Temperature ( o Start-up Voltage (V) -40 -20 0 20 40 60 80 100 120 140 8.1 8.3 8.5 8.7 8.9 9.1 9.3 9.5 9.7 9.9 Shutdown Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 Start-up Current (A) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 140 Operation Current (mA) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 0.70 0.72 0.74 0.76 0.78 0.80 0.82 0.84 0.86 Maximum VCS (V) Ambient Temperature ( o At VBOK=0.95V -40 -20 0 20 40 60 80 100 120 0.80 0.82 0.84 0.86 0.88 0.90 0.92 0.94 0.96 0.98 1.00 VBOK (V) Ambient Temperature ( o Performance Characteristics Start-up Voltage vs. Ambient Temperature Shutdown Voltage vs. Ambient Temperature Start-up Current vs. Ambient Temperature Operation Current vs. Ambient Temperature Maximum VCS vs. Ambient Temperature VBOK vs. Ambient Temperature
Document number: DS37419 Rev.2 - 2 7 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT -40 -20 0 20 40 60 80 100 120 140 28.00 28.25 28.50 28.75 29.00 29.25 29.50 29.75 30.00 VCC OVP Voltage (V) Ambient Temperature ( o 10 15 20 25 30 35 40 45 100 120 140 160 180 200 fOSC (kHz) Bias Resistor (k) fOSC Typical -40 -20 0 20 40 60 80 100 120 140 fOSC (kHz) Ambient Temperature ( o fOSC Typical 0 4 8 12 16 0.0 2.0 4.0 6.0 8.0 VCC Start-up Current (A) VCC (V) 0 4 8 12 16 20 24 ICC (mA) VCC (V) Performance Characteristics (Cont.) Oscillation Frequency vs. Bias Resistor Oscillation Frequency vs. Ambient Temperature VCC Start-up Current vs. VCC Voltage (R8=27k) Operation Current vs. VCC Voltage VCC OVP Voltage vs. Ambient Temperature
Document number: DS37419 Rev.2 - 2 8 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Operation Description The AP3102/V/L is specifically designed for off-line AC-DC power supply used in LCD monitor, notebook adapter and battery charger applications. It offers a cost effective solution with versatile protection functions for system designer. Start-up Current and UVLO The start-up current of AP3102/V/L is optimized to realize ultra low current (5 A typical) so that VCC capacitor can be charged more quickly. The direct benefit of low start -up current is the availability of using large start -up resistor, which minimizes the resistor power loss for high voltage AC input. A UVLO comparator is included in AP3102/V/L to detect the voltage on the VCC pin. It ensures AP3102/V/L to draw adequate energy f rom hold- up capacitor during power-on. The turn-on threshold is 16V and the turn-off threshold is 10V. Oscillator The oscillation frequency is programmed by the value of resistor R8, connected from pin RI to ground. The resistor will make a constant current source to determine the oscillation frequency by charging and discharging an internal capacitor. The oscillation frequency can be expressed as: )()(8 1720 kHzkRf The recommended oscillation frequency is 40 to 130kHz from the EMI consideration. Current Sense Comparator and PWM Latch AP3102/V/L operates as a current mode controller; the output switch conduction is initiated by every oscillator cycle and terminated when the peak inductor current reaches the threshold level established by the FB pin. The inductor current signal is converte d to a voltage signal by inserting a reference sense resistor R S. The inductor current under normal operating conditions is controlled by the voltage at FB pin, the relation between peak inductor current (IPK) and VFB is: SFBPK RVI 3/)9.0( Abnormal operating conditions occur when the power supply output is overloaded or the output voltage sensing is lost. Under these conditions, the current sense comparator threshold will be internally clamped to a value related to the value of V BOK. As VBOK value is proportional to the input line voltage, the constant over load protection can be achieved by compensating the delay t ime effect from the input line. The maximum peak switch current is: SBOKMAXPK RVI /)055.085.0()( Leading-edge Blanking A narrow spike on the leading edge of the current waveform can usually be observed when the power MOSFET is turned on. A 250ns leading - edge blank is built-in to prevent the false-triggering caused by the turn-on spike. During this period, the current limit comparator is disabled and the gate driver can not be switched off. A resistor is usually connected to the current sense pin to avoid the PCB trace interfer ence and it also can adjust the inductor peak current tinily by the resistance. Of course, adding a RC filter to CS pin is better to attenuate any unexpected noise. Built-in Slope Compensation It is well known that a continuous current mode SMPS may become unstable when the duty cycle exceeds 50%. The built -in slope compensation can improve the stability, so there is no need for design engineer to spend much time on that. FB Pin and Short Circuit Protection This pin is normally connected to the opt o-coupler and always paralleled with a capacitor for loop compensation. When the voltage at this pin is greater than 4.2V (such as output short to ground or the opto-coupler is broken) and lasts for about 35ms, the IC will enter the protection mode. For AP3102, the system will enter hiccup mode to wait the VCC decreasing to low UVLO level, then the IC will try to restart u ntil the failure removes. For AP3102V, the IC will be latched unless unplugging the AC socket. Moreover, if the voltage is less than 0.7V, the IC will stop the drive pulse immediately. Therefore, this feature can be used for short circuit protection, which makes the system immune from catastrophic failure.
Document number: DS37419 Rev.2 - 2 9 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Operation Description (Cont.) Brown-out and BOK Pin The switching converter normally has a suitable input range , thus it makes the switching component operate under the safe operation condition. Too low or too high input will bring large heat shock or voltage spike on the switching device. Brown -out and line OVP function will avoid the supply to be worked in the unwanted condition such as below minimum and over maximum line voltage. The internal BOK connection is shown as the figure below: SENSE OCP 0.85V BOK BOK OVP 0.5V 0.9V 5V BOK Disable UVLO 1A VCB From the figure, it is seen that the BOK is connected to the OCP comparator and used as feedforward to the V CS_MAX (Refer to current sense or under 0.5V (brown-out trigger), the IC enters the auto-recoverable protection. The ratio of R1/R2 is used to adjust the line voltage divider value. VON No Gate Output UVLO VCC 35mS No Gate HV OK Range VOFF HV 4V No Gate Output ADJ Pin and Green Mode Operation Low standby loss is the main requirement for AC-DC off line power supply. The AP3102/V/L has a green mode operation to improve the light load or no load efficiency. When the load power becomes low and VFB decreases to the threshold value, the IC will enter the green mode which means the switching frequency will decrease with the load decrease. And when the load power becomes much lower, the IC will operate at the skip mode to reduce switching loss, core loss and other high frequency loss due to blanking the driver. In skipping mode, the high frequency pulses is about 25kHz for the best standby performance. LEB Slope Compensation Skip Cycle 0.85V R ADJ SENSE A RADJ Driver Control Circuit 25A FB
Document number: DS37419 Rev.2 - 2 10 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Operation Description (Cont.) The VADJ threshold is adjustable by changing the external resistor connected from pin ADJ to the ground. Adjusting the V ADJ voltage can optimize the standby power and audible noise for most applications. Another function of ADJ pin is to use it as the latch trigger input. When the voltage at this pin is more than 4.5V, the system will be latched by limiting the V CC to a lower voltage. If the IC is started from bulk capacitor through resistor, the system will be latched until the bulk volt age decreases to a very low value just like unplugged the AC input. Then, the IC lat ch current can 't be maintained and latch will be released (see description below). This function can be used as system OTP and other protection. System Protection and Pin Fault Protection AP3102/V/L provides versatile system and pin fault protections. Th e OCP comparator realizes the cycle -by-cycle current limiting (OCP). Cooperating with BOK compensation from the input line voltage, the IC realizes the constant over load protection (OLP). VCC o ver voltage protection can be applied as the primary OVP or op to-coupler broken protection. The AP3102/V/L also has pin fault connection protection including floating and short connection. The floating pin protection includes the RI, SENSE, FB, etc; the short pin protection includes the RI pin short protection. When these pins are floated or RI pin is shorted to ground, PWM switching will be disabled, thus protect the power system. Below figures show the relative timing sequences of system protections. VBOK Gate drive UVLO VCC 0.5V 35mS VFB 35mS 4.2V Line OVP & Brown-Out Output Short Vo VCC OVP (AP3102) 25S 28V VADJ Gate drive Latch until unplug AC UVLO VCC >25S De-latch Point Auto Recoverable Protection Mode Latch Protection Mode VADJ VFB 35mS 4.2V Vo Latch through ADJ Pin Output Short (AP3102L) VCC OVP (AP3102V, AP3102L) 25S 28V UVLO 25S Typical Timing Sequences of AP3102/V/L Protections
Document number: DS37419 Rev.2 - 2 11 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT
Ordering Information
TR : Tape & Reel Blank: Tube G1 : Green Product Name RoHS/GreenPackage Blank: AP3102 V: AP3102V L: AP3102L M: SO-8 Diodes IC’s Pb-free products with "G1" suffix in the part number, are RoHS compliant and green . Package Temperature Range Part Number Marking ID Packing SO-8 -40 to +85oC AP3102M-G1 3102M-G1 100/Tube AP3102MTR-G1 3102M-G1 4000/Tape & Reel AP3102VM-G1 3102VM-G1 100/Tube AP3102VMTR-G1 3102VM-G1 4000/Tape & Reel AP3102LM-G1 3102LM-G1 100/Tube AP3102LMTR-G1 3102LM-G1 4000/Tape & Reel Product Version Classification (with Different Protection Functions) Product Version External Trigger by ADJ VOVP Output Short (OLP) AP3102 Latch Auto-Recoverable Auto-Recoverable AP3102V Latch Latch Auto-Recoverable AP3102L Latch Latch Latch Marking Information (Top View) First and Second Lines: Logo and Marking ID (See Ordering Information) Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code XX: 7th and 8th Digits of Batch No.
Document number: DS37419 Rev.2 - 2 12 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SO-8 0 ° 8 ° 1 ° 7 ° R0.150(0.006) R0.150(0.006) 1.000(0.039) 0.300(0.012) 0.510(0.020) 1.350(0.053) 1.750(0.069) 0.100(0.004) 0.300(0.012) 3.800(0.150) 4.000(0.157) 7 ° 20:1 D 1.270(0.050) TYP 0.150(0.006) 0.250(0.010) 8 ° D 5.800(0.228) 6.200(0.244) 0.600(0.024) 0.725(0.029) 0.320(0.013) 8 ° 0.450(0.017) 0.820(0.032) 4.700(0.185) 5.100(0.201) Note: Eject hole, oriented hole and mold mark is optional. Option 1 Option 1 Option 2 0.350(0.014) TYP TYP TYP 9°~ 9°~
Document number: DS37419 Rev.2 - 2 13 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT Suggested Pad Layout (1) Package Type: SO-8 Grid placement courtyard ZG Y E X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch)
Document number: DS37419 Rev.2 - 2 14 of 14 www.diodes.com July 2014 © Diodes Incorporated AP3102/V/L A Product Line of Diodes Incorporated NEW PRODUCT IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporat ed does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license unde r its patent or trademark rights, nor the rights of others. Any Customer or us er of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diod es Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized appl ication, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product nam es and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or sys tems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2014, Diodes Incorporated www.diodes.com