MP4032-1GS

MP4032-1 Primary-Side-Controlled, Offline LED Driver with Fully-Integrated Internal MOSFET The Future of Analog IC Technology DESCRIPTION FEATURES The MP4032-1 is a TRIAC-dimmable, primaryside-controlled, offline, LED lighting driver with an integrated 500V MOSFET. It can achieve a high power factor and accurate LED current control for lighting applications in a single-stage converter. The proprietary real-current control can accurately control the secondary-side LED current using primary-side information. It simplifies LED lighting systems and increases efficiency by removing the secondary feedback components and the current-sensing resistor. • The MP4032-1 has a power-factor-correction function and works in boundary-conduction mode that reduces power losses. The DRAIN pin can supply current to the internal charging circuit for start-up without a perceptible delay. The proprietary dimming control extends the TRIAC-based dimming range. The multiple protections greatly enhance system reliability and safety. These protections include VCC under-voltage lockout, LED overvoltage and over-current protections, shortcircuit protection, and over-temperature protection. The MP4032-1 is available in an SOIC8-7A package. • • • • • • • • • • • • • Real Current Control without Secondary Feedback Circuit Internal MOSFET with 500V High Voltage Rating Less than 6W Output Power Internal Charging Circuit for Fast Start-Up Accurate Line Regulation Flicker-Free, Phase-Controlled TRIAC Dimming with Extended Dimming Range High Power Factor Boundary-Conduction Mode VCC UVLO Cycle-by-Cycle Current Limiting Over-Voltage Protection Short-Circuit Protection Over-Temperature Protection Available in SOIC8-7A Package APPLICATIONS • • • Solid-State Lighting Industrial and Commercial Lighting Residential Lighting 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. The MP4032-1 is patent pending. Warning: Although this board is designed to satisfy safety requirements, the engineering prototype has not been agency approved. Therefore, all testing should be performed using an isolation transformer to provide the AC input to the prototype board. MP4032-1 Rev. 1.02 www.MonolithicPower.com 7/15/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 MP4032-1—PRIMARY-SIDE-CONTROLLED, OFFLINE LED DRIVER WITH FULLY-INTEGRATED MOSFET TYPICAL APPLICATION TRIAC Dimmer EMI Filter Damper & Bleeder COMP DRAIN MULT ZCD CS VCC GND MP4032-1 MP4032-1 Rev. 1.02 www.MonolithicPower.com 7/15/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 MP4032-1—PRIMARY-SIDE-CONTROLLED, OFFLINE LED DRIVER WITH FULLY-INTEGRATED MOSFET ORDERING INFORMATION Part Number* Package SOIC8-7A MP4032-1GS Top Marking MP4032-1 * For Tape & Reel, add suffix –Z (e.g. MP4032-1GS–Z) PACKAGE REFERENCE TOP VIEW COMP 1 8 DRAIN MULT 2 ZCD 3 6 CS VCC 4 5 GND SOIC8-7A ABSOLUTE MAXIMUM RATINGS (1) VCC ................................................-0.3V to +30V ZCD Pin .............................................-7V to +7V Drain-Source Voltage .................-0.3V to +500V Continue Drain Current .................................. 1A Other Analog Inputs and Outputs ...-0.3V to +7V (2) Continuous Power Dissipation (TA = +25°C) ............................................................. 1.3W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C Recommended Operating Conditions Thermal Resistance (4) θJA θJC SOIC8-7A................................96 ...... 45 ... °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ(MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD(MAX)=(TJ(MAX)TA)/ θJA. Exceeding 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 outside of its operation conditions. 4) Measured on JESD51-7 4-layer board. (3) Supply Voltage VCC ........................10.3V to 27V Operating Junction Temp. (TJ).-40°C to +125°C MP4032-1 Rev. 1.02 www.MonolithicPower.com 7/15/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 3 MP4032-1—PRIMARY-SIDE-CONTROLLED, OFFLINE LED DRIVER WITH FULLY-INTEGRATED MOSFET ELECTRICAL CHARACTERISTICS VCC = 16V, TA = +25°C, unless otherwise noted. Parameter Supply Voltage Operating Range Turn-On Threshold Symbol Condition Min After turn-on VCC rising VCC_CHG_NF VCC_CHG_F VCC VCC_ON Drain-Charger Starting Threshold Hysteresis Voltage Supply Current Drain Charger Supply Current Start-Up Current Typ Max Units 10.3 13.3 13.8 27 14.3 V V VCC falling, no fault 8.9 9.4 9.9 V VCC falling, fault occurs 7.1 7.5 7.9 V VCC_ON_CHG_HYS 4.5 V VCC_CHG_HYS 2 V ICC_CHARGE ISTARTUP Quiescent Current IQ Operating Current Multiplier Operation Range Gain ICC Before system turns on 4.5 No switching No switching, fault hiccup fs =70kHz VMULT K(5) 0 0.8 6 150 900 500 1 7.5 195 970 570 1.1 mA µA µA µA mA 1 3 1.2 V 1/V Error Amplifier Reference Voltage VREF 0.389 0.403 0.417 V Transconductance(6) GEA 125 µA/V Lower Clamp Voltage Max. Source Current (6) VCOMP_L 1.83 1.9 1.97 V ICOMP_SOURCE 50 µA Max. Sink Current ICOMP_SINK -350 µA COMP OCP Threshold VCOMP_OCP (6) VCOMP rising edge 4.8 5 5.2 V τLEB 220 310 400 ns VCS_CLAMP_H 2.17 2.27 2.37 V VCS_CLAMP_L 115 145 175 mV 0.38 V Current Sense Comparator Leading-Edge Blanking Time Current Sense Upper Clamp Voltage Current Sense Lower Clamp Voltage Feedback Gain KCS 130µs auto-switching mode & the output of Multiplier is 0.5 ⋅ VCO _PP . Optional Protection Circuit In large output voltage or large LEDs current application, MOSFET M may be destroyed by over-voltage or over-current when LED+ shorted to LED- at working. Gate-Source(GS) Over-voltage Protection DO DO NS RO DM + R CO C DZ NS RO D + R CO C M DG DZ RG + + Figure 10: Gate-Source OVP Circuit Figure9: Ripple Suppressor Principle Shown in Figure 9, Resister R, capacitor C, and MOSFET M compose the ripple suppressor. Through the RC filter, C gets the mean value of the output voltage VCo to drive the MOSFET M. M works in variable resistance area. C’s voltage VC is steady makes the LEDs voltage is steady, so the LEDs current will be smooth. MOSFET M holds the ripple voltage vCo of the output. Diode D and Zener diode DZ are used to restrain the overshoot at start-up. In the start-up process, through D and DZ, C is charged up quickly to turn on M, so the LED current can be built quickly. When VC rising up to about the steady value, D and DZ turn off, and C combines R as the filter to get the mean voltage drop of VCo. The most important parameter of MOSFET M is the threshold voltage Vth which decides the power loss of the ripple suppressor. Lower Vth is better if the MOSFET can work in variable resistance area. The BV of the MOSFET can be selected as double as VCo and the Continues Drain current level can be selected as decuple as the LEDs’ current at least. Figure 10 shows GS over-voltage protection circuit. Zener diode DG and resistor RG are used to protect MOSFET M from GS over-voltage damaged. When LED+ shorted to LED- at normal operation, the voltage drop on capacitor C is high, and the voltage drop on Gate-Source is the same as capacitor C. The Zener diode DG limits the voltage VGS and RG limits the charging current to protect DG. RG also can limit the current of DZ at the moment when LED+ shorted to LED-. VDG should bigger than Vth. Drain-Source Over-voltage and Over-current Protection As Figure 11 shows, NPN transistor T, resistor RC and RE are set up to protect MOSFET M from over-current damaged when output short occurs at normal operation. When LED+ shorted to LED-, the voltage vDS of MOSFET is equal to the vCo which has a high surge caused by the parasitic parameter. Zener Dioder DDS protects MOSFET from over-voltage damaged. Transistor T is used to pull down the VGS of M. When M turns off, the load is opened, then the OVP mode is triggered, About the RC filter, it can be selected by τRC ≥ 50 / fLineCycle . Diode D can select 1N4148, MP4032-1 Rev. 1.02 www.MonolithicPower.com 7/15/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 16 MP4032-1—PRIMARY-SIDE-CONTROLLED, OFFLINE LED DRIVER WITH FULLY-INTEGRATED MOSFET and the IC functions in quiescent. The pull down point is set by RC and RE: RC /RE ⋅ RC VCO = 0.7V . 2 DDS MOSFET LIST In the Table 1, there are some recommended MOSFET for ripple suppressor. RE T DO NS RO D M + R CO C DZ RG + Figure 11: Drain-Source OVP and OCP Circuit Manufacture P/N Si4446DY FTD100N10A P6015CDG Manufacture Vishay IPS NIKO-SEM Table 1: MOSFET LIST VDS/ID Vth(VDS=VGS@TJ=25°C) 40V/3A 0.6-1.6V@ Id=250μA 100V/17A 1.0-2.0V@ Id=250μA 150V/20A 0.45-1.20V@ Id=250μA Package SO-8 TO-252 TO-252 MP4032-1 Rev. 1.02 www.MonolithicPower.com 7/15/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. Power Stage