MP110

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Technical content

900V Offline Switching Regulator

DESCRIPTION

The MP110 is a flyback regulator with an integrated 900V MOSFET. Requiring a minimum number of external components, the MP110 provides excellent power regulation in AC -DC applications that require high reliability. These applications include sm art meters, large appliances, industrial controls and products powered by unstable AC grids. The regulator uses peak current mode control to provide excellent transient response and easy loop compensation. When the output power falls below a given level, the regulator enters burst mode to lower the stand-by power consumption. The MPS proprietary 900V monolithic process enables an over temperature protection (OTP) that is on the same silicon of the 900V power FET, offering the most precise thermal protection. It also offers a full suite of protection features such as V CC under-voltage lockout, over -load protection, over -voltage protection, and short - circuit protection. The MP110 is designed to minimize electromagnetic interference for wireless communication in home and building automation applications. The operating frequency is externally programmed with a single resistor so that the power supply’s radiated energy can b e designed to avoid the interference to wireless communication. In addition to the programm able frequency, the MP110 employs a frequency jittering function that not only greatly reduces the noise level, but also reduces the cost of EMI filter. The MP110 is available in the PDIP8 -7EP package.

FEATURES

• Internal Integrated 900V MOSFET
• Programmable switching frequency up to 300kHz
• Frequency jittering
• Current-mode operation
• Internal high voltage current source
• L ow standby power consumption via active burst mode
• Internal leading-edge blanking
• Built-in soft-start function
• Internal slope compensation
• B uilt-in PRO pin pull-up auto restart function
• Over-Temperature Protection (OTP)
• V CC under-voltage lockout with hysteresis
• Over-Voltage Protection on VCC
• Time-based overload protection
• Short-Circuit Protection (SCP)

APPLICATIONS

• Smart Power Meters
• Large Appliances
• Industrial Controls
• All AC- DC supplies sold where power grid may be unstable All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. MP110 Rev. 1.01 www.MonolithicPower.com 1 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR TYPICAL APPLICATION GND Input 85~420 VAC VOUT GND FSET DrainVcc PRO FB Source MP110 VCC VCC MP110 Rev. 1.01 www.MonolithicPower.com 2 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR

ORDERING INFORMATION

Part Number* Package Top Marking MP110GPR PDIP8-7EP MP110 * For Tape & Reel, add suffix –Z (e.g. MP110GPR–Z); PACKAGE REFERENCE TOP VIEW 1 8 VCC FSET PRO FB DRAIN SOURCE GND PDIP8-7EP ABSOLUTE MAXIMUM RATINGS (1) Continuous Power Dissipation (TA=+25°C) (2) Recommended Operation Conditions (3) Operating Junction Temp (TJ) .. -40°C to +125°C Thermal Resistance (4) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature T J (MAX), t he junction- to- ambient thermal resistance θ JA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D (MAX) = (T J (MAX)-TA)/θJA. Exce eding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage 3) The device is not guaranteed to function outs ide of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. MP110 Rev. 1.01 www.MonolithicPower.com 3 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR

ELECTRICAL CHARACTERISTICS

VCC =12V, TJ=-40°C~125°C, Min & Max are guaranteed by characterization, typical is tested under 25°C, unless otherwise noted Parameter Symbol Conditions Min Typ Max Unit Start-up Current Source (Pin Drain) Supply Current from Drain ICharge VCC =6V; VDrain=400V 1.5 2 2.9 mA Leakage Current from Drain ILeak VCC =13V; VDrain=400V 15 30 μA Break-Down Voltage V(BR)DSS Ileakage=100μA 900 V On-State Resistance RDS(ON) VCC =10V; IDrain=100mA; TJ=25℃ 13 17 Ω TJ=125℃ 22 26 Ω Supply Voltage Management (Pin VCC) VCC Upper Level at which the IC Switch On VCCH 10.6 11.7 13.2 V VCC Lower Level at which the IC Switch Off VCCL 7 8 9 V VCC Hysteresis VCC_HYS 3 3.8 4.6 V VCC OVP Level VOVP 22.5 24 25.3 V VCC Re-Charge Level at which the Protection Occurs VCCR 4.5 5.3 6 V Quiescent Current at Protection Phase IPro VCC=6V; Vpro=4V 600 μA Quiescent Current IQ VCC=13V 700 900 uA Operation Current ICC VCC=13V; fS=100kHz 1.7 2 mA Feedback Management (Pin FB) Internal Pull-Up Resistor RFB 10 kΩ Internal Pull-Up Voltage VUP 3.8 4.1 4.4 V FB to Current-Set-Point Division Ratio Idiv 3.3 3.5 Internal Soft-Start Time TSS 3 ms FB Decreasing Level at which the R egulator Enters Burst Mode VBURL 0.4 0.5 0.6 V FB Increasing Level at which the Regulator Leaves Burst Mode VBURH 0.58 0.7 0.86 V Over-Load Set Point VOLP 3.6 3.8 4 V Over-Load Delay Time TDelay fS=100kHz 82 ms MP110 Rev. 1.01 www.MonolithicPower.com 4 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR VCC =12V, TJ=-40°C~125°C, Min & Max are guaranteed by characterization, typical is tested under 25°C, unless otherwise noted Parameter Symbol Conditions Min Typ Max Unit Timing Resistor(Pin FSET) FSET Reference Voltage VFSET 1.16 1.23 1.29 V Frequency Spectrum Jittering Range, in Percentage of Fs RJittering Example: f S=100kHz, then jittering is ±4kHz ±4 % Typical Operating Frequency fS TJ=25 ℃;RFSET=100kΩ 90 104 118 kHz Current Sampling Management (Pin Source) Leading-Edge Blanking for Current Sensor TLEB1 650 ns Leading-Edge Blanking for SCP TLEB2 600 ns Maximum Current Set Point VCS 0.90 0.96 1.02 V Short-Circuit Protection Set Point VSC 1.32 1.42 1.62 V Slope Compensation Ramp SRamp fS=100kHz 40 mV/μs Protection Management (Pin PRO) Protection Voltage VPRO 2.95 3.1 3.3 V Protection Hysteresis VHY 0.2 V Thermal Shutdown Thermal Shutdown Threshold 150 °C Thermal Shutdown Recovery Hysteresis 30 °C MP110 Rev. 1.01 www.MonolithicPower.com 5 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR PIN FUNCTIONS Pin # Name Description 1 FB Feedback. The output voltage from the external compensation circuit is fed into this pin. This pin and the current sense signal from Source determines t he PWM duty cycle. A feedback voltage of V OLP triggers over-load protection, while VBURL triggers burst-mode operation. T he regulator exit s burst-mode operation and enters normal operation when the FB voltage reaches VBURH. 2 PRO Protection. Pull-up PRO to shut down the IC with hysteresis. 3 FSET Switching converter f requency set. Connect a resistor to GND to set the switch ing frequency up to 300kHz.

4 VCC

Supply voltage. Connect a 22μF bulk capacitor and a 0.1uF ceramic capacitor for most applications. When VCC rises to VCCH, the IC starts switching; when it falls below VCCL, the IC stops switching. 5 Drain Drain of the internal MOSFET. Input for the start-up high voltage current source. 7 Source Source of the internal MOSFET. Input of the primary current sense signal. 8 GND The IC Ground. MP110 Rev. 1.01 www.MonolithicPower.com 6 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR TYPICAL CHARACTERISTICS MP110 Rev. 1.01 www.MonolithicPower.com 7 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR TYPICAL CHARACTERISTICS (continued) MP110 Rev. 1.01 www.MonolithicPower.com 8 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS Performance waveforms are tested on the evaluation board of the Design Example section. VIN = 230V, VOUT1 = 12.5V, VOUT2 = 5V, Primary Inductance=2.5mH, NP:NAUX:NS1:NS2 = 125:14:14:9, TA = 25°C, unless otherwise noted. MP110 Rev. 1.01 www.MonolithicPower.com 9 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) Performance waveforms are tested on the evaluation board of the Design Example section. VIN = 230V, VOUT1 = 12.5V, VOUT2 = 5V, Primary Inductance=2.5mH, NP:NAUX:NS1:NS2 = 125:14:14:9, TA = 25°C, unless otherwise noted. MP110 Rev. 1.01 www.MonolithicPower.com 10 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR FUNCTIONAL BLOCK DIAGRAM FSET FB GND Vcc Source PRO Current Sensor Comparator Driving Signal Management Power Management Frequency Control Fault Signal Management Peak Current Conversion Drain OLP Burst Mode Control SCP OVP OTP LEB1 LEB2 SCP Comparator Figure 1: Internal Function Block Diagram MP110 Rev. 1.01 www.MonolithicPower.com 11 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR Over Load Protection (OLP) MP110 shuts when the power supply undergoes an overload. OLP is achieved by continuously monitoring the FB voltage. A fault signal is triggered when FB pulls up to 3.8V (V OLP, typical value) and after 82ms delay (8192 switching cycle, f S=100kHz), if the fault signal is still present, MP110 shuts down. When the fault disappears, the power supply resumes operation. The OLP delay time can be attained below. Delay S 82ms 100kHzT f Short Circuit Protection (SCP) By monitoring the CS Pin, MP110 shuts down when the voltage rises higher than 1.42V (V SC, typical value) to indicate a short circuit. The MP110 enters a safe low-power mode that prevents any thermal damage or stress damage. As soon as the fault disappears, the power supply resumes operation. Thermal shutdown (OTP) When the junction temperature of the IC exceeds 150℃, the over temperature protection is activated and stops output driver switching to prevent MP110 from any thermal damage. As soon as the junction temperature drops below 120℃, the regulator resumes operation. During the protection period, the regulator enters auto - recovery mode. The VCC voltage is discharged to V CCR and is re- charged to VCCH by the internal high voltage current source. Burst Operation To minimize stand- by power consumption, the MP110 implement burst mode at no load and light load. As the load decreases, the FB voltage decreases. The IC stops switching when the FB voltage drops below 0.5V ( VBRUL, typical value) . As the load power increases, the output voltage drops at a rate dependent on the load. This causes the FB voltage to rise again due to the negative feedback control loop. Once the FB voltage exceeds 0.7V ( V BRUH, typical value ), the switching pulse resumes. The FB voltage then decreases and the whole process repeats. Burst- mode operation alternately enables and disables the switching pulse of the MOSFET. Hence switching loss at no load and light load conditions is greatly reduced. Figure 4 shows the burst mode operation of MP110. VFB VDS 0.7V 0.5V Figure 4: Burst Mode Operation PRO Pin The PRO pin provides extra protection against abnormal conditions. Use the PRO pin for input OVP or other protections (input UVP, over - temperature protection for key component and so on). If the PRO pin voltage exceeds 3.1V (VPRO, typical value) , the IC shuts down to enter auto - recovery mode. As soon as the fault disappears, the power supply resumes operation. Peak Current Limit In normal operation, the primary peak current is sensed by a sensing resistor between the Source pin and Ground. The turn- off threshold of the MOSFET is set by FB voltage, V Sense=VFB/Idiv. When the sensing resistor voltage reaches the VSense, the MOSFET turns off. The Idiv is the FB to current-set-point division ratio. During over -load condition, the primary peak current threshold is internally limited to the maximum value 0.96V (V CS, typical value) even if VFB voltage exceeds 3.2V to avoid excessive output power and lower the switch voltage rating. During start-up period, the primary peak current threshold internally increases to the maximum current set point VCS gradually. Leading Edge Blanking In order to avoid turning off the MOSFET from mis-trigger spikes shortly after the switch turns MP110 Rev. 1.01 www.MonolithicPower.com 13 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR on, the IC implements leading -edge blanking. During the blanking time, any trigger signal on source pin is blocked. An internal leading -edge blanking(LEB) unit containing two LEB times is employed between the Source pin and the current comparator input to avoid premature switching pulse termination due to the parasitic capacitances. During the blanking time, the current comparator is disabled and can not turn off the MOSFET. Current sensor leading edge blanking inhibits the current limitation comparator during 650ns (T LEB1, typical value) and SCP leading edge blanking inhibits the SCP current comparator during 600ns LEB2, typical value). Figure 5 shows the primary current sense waveform and the leading edge blanking. TLEB1=650ns TLEB2=600ns Figure 5: Leading Edge Blanking MP110 Rev. 1.01 www.MonolithicPower.com 14 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR PRO CPro Bus Voltage 600V Figure 10: Input Over Voltage Protection Setup The input over voltage protection point can be calculated by the following function: INOVP PRO R5 R6 R7 R8VV R8 +++= × 1206 packages should be used for resistors R5~R8 for safety consideration and the total value should be larger than 10M Ω for energy saving purpose. The switching voltage noise could be introduced by large R5~R8 value which disturbs the PRO pin protection action. One ceramic cap with around 1nF should be paralleled with PRO pin and GND pin. It should be located near the IC to decouple the switching voltage noise. Frequency Jittering MP110 provides the frequency jittering function which simplifies the input EMI filter design and also decreases the system cost. MP110 has the optimized frequency jittering with ±4% frequency deviation range and 256TS carrier cycle which can effectively improve EMI by spreading the energy dissipation over the frequency range. Thermal MP110 is popular for high input voltage application with 900V integrated MOSFET. The thermal is the key factor to influence the output power especially the high input voltage and high operating frequency. The turn -on loss is dominant in high input voltage caused by the parasitic cap of secondary side diode and transformer, which bring about the IC very high junction temperature. In order to deliver maximum power, a proper heatsink for MP110 should be designed for optimum thermal performance. In addition, it’s recommended to set the operating frequency less than 150kHz in order to achieve better thermal performance and better EMI in application. PCB Layout Guide PCB layout is important to achieve reliable operation, good EMI performance, and good thermal performance. Follow these guidelines to optimize performance. 1) Minimize the power stage switching stage loop area. This includes the input loop (C 2– C1-T1–U1–R12/R13–C2), the auxiliary winding loop (T1–D6–C6–T1), the output loop (T1–D8–C9–T1 and T1–D7–C7– T1) and the RCD loop (T1–D5–R16/R17/C3–T1) 2) The input loop GND and control circuit should be separate and only connect at C2. 3) Connecting the heatsink to the primary GND plane improves EMI and thermal dissipation. 4) Place the control circuit capacitors (such as those for FB, PRO and VCC pins) close to IC to decouple switching voltage noise. 5) Enlarge the GND pad near the IC for good thermal dissipation. 6) Keep the EMI filter far away from the switching point. 7) The two output s clearance distance should satisfy the insulation requirement. MP110 Rev. 1.01 www.MonolithicPower.com 17 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR Table 2—Winding Order Tape (T) Winding Margin Wall PRI side Terminal Start— >End Margin Wall SEC side Wire Size (φ) Turns ( T ) N1 0mm 1— >NC 0mm 0.18mm*2 18 N2 0mm 2—>1 0mm 0.18mm*1 125 N3 0mm 4—>3 0mm 0.15mm*1 14 N4 0mm 5—>6 0mm 0.4mm*1 14 N5 3mm 10— >9 3mm 0.2mm*1 9 3 MP110 Rev. 1.01 www.MonolithicPower.com 20 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR FLOW CHART MP110 Rev. 1.01 www.MonolithicPower.com 21 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR EVOLUTION OF THE SIGNALS IN PRESENCE OF FAULTS Fault Condition MP110 Rev. 1.01 www.MonolithicPower.com 22 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.

MP110 – 900V OFFLINE SWITCHING REGULATOR

PACKAGE INFORMATION

NOTE : 1 ) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS . 2 ) PACKAGE LENGTH AND WIDTH DO NOT INCLUDE MOLD FLASH , OR PROTRUSIONS. 3 ) JEDEC REFERENCE IS MS-001, VARIATION BA . 4 ) DRAWING IS NOT TO SCALE . TOP VIEW SIDE VIEW PIN 1 ID MARKING NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP110 Rev. 1.01 www.MonolithicPower.com 23 6/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved.