MP6908GJ-Z

MP6908 The Future of Analog IC Technology Fast Turn-Off Intelligent Rectifier with No Need for Auxiliary Winding DESCRIPTION FEATURES The MP6908 is a low-drop diode emulator IC that, when combined with an external switch, replaces Schottky diodes in high-efficiency flyback converters. The MP6908 regulates the forward drop of an external synchronous rectifier (SR) MOSFET to about 40mV, which switches off once the voltage becomes negative.  The MP6908 can generate its own supply voltage for battery charging applications with potential low output voltage, and at short circuit output condition, or for high-side SR configuration. Programmable ringing detection circuitry prevents the MP6908 from turning on falsely at Vds oscillations during discontinuous conduction mode (DCM) and quasi-resonant operation. The MP6908 is available in a space-saving TSOT23-6 package.          Wide Output Range down to 0V, No Short Circuit Current Flows through Body Diode No Need for Auxiliary Winding for High-Side or Low-Side Rectification Ringing Detection Prevents False Turn-On during DCM and Quasi-Resonant Operations Works with Standard and Logic Level SR MOSFETS Compatible with Energy Star ~30ns Fast Turn-Off and Turn-On Delay ~100µA Quiescent Current Supports DCM, CCM, and Quasi-Resonant Operations Supports both High-Side and Low-Side Rectification TSOT23-6 Package Available APPLICATIONS    USB PD Quick Chargers Adaptors Flyback Power Supplies with Very Low and/or Variable Output Voltage All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP6908 Rev. 1.1 5/27/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER ORDERING INFORMATION Part Number* MP6908GJ Package TSOT23-6 Top Marking See Below * For Tape & Reel, add suffix –Z (e.g. MP6908GJ–Z) TOP MARKING AZE: Product code of MP6908GJ Y: Year code PACKAGE REFERENCE TOP VIEW TSOT23-6 ABSOLUTE MAXIMUM RATINGS (1) VDD, VG to VSS ........................... -0.3V to +14V VD, HVC to VSS ............................ -1V to +180V SLEW to VSS ............................... -0.3V to +6.5V Continuous power dissipation (TA = +25°C)(2) ……………………………………………….0.56W Junction temperature ................................ 150°C Lead temperature (solder) ........................ 260°C Storage temperature .................-55°C to +150°C Recommended Operation Conditions (3) VDD to VSS ........................................ 4V to 13V VD, HVC to VSS ............................ -1V to +150V Maximum junction temperature (TJ) ......... 125°C MP6908 Rev. 1.1 5/27/2020 Thermal Resistance (4) θJA θJC TSOT23-6 ............................ 220 .... 110 ... °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 produces an excessive die temperature, causing the regulator to 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 operating conditions. 4) Measured on JESD51-7, 4-layer PCB. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER ELECTRICAL CHARACTERISTICS VDD = 5V, TJ = -40°C~125°C, unless otherwise noted. Parameter Supply Management Section VDD UVLO rising VDD UVLO hysteresis VDD maximum charging current Symbol IVDD VDD regulation voltage Operating current Quiescent current Shutdown current Control Circuitry Section Forward regulation voltage (VSS - VD) Turn-on threshold (VDS) Turn-off threshold (VSS - VD) Turn-on delay Turn-off delay Turn-off propagation delay(5) Turn-on blanking time Turn-off blanking threshold (VDS) Turn-off threshold during minimum on time (VDS) Turn-on slew rate detection timer Gate Driver Section VG (low) VG (high) Maximum source current (5) Maximum sink current (5) Pull-down impedance ICC Iq(VDD) ISD(VDD) Conditions VDD = 7V, HVC = 40V VDD = 4V, VD = 30V VD = 12V, HVC = 12V HVC = 3V, VD = 12V VDD = 9V, CLOAD = 2.2nF, FSW = 100kHz VDD = 5V, CLOAD = 2.2nF, FSW = 100kHz VDD = 5V VDD = UVLO - 0.1V Vfwd TDon TDoff CLOAD = 2.2nF CLOAD = 2.2nF TB-ON CLOAD = 2.2nF VB-OFF Min Typ Max Units 3.55 0.1 35 20 8.5 4.6 3.75 0.2 70 40 9 5 3.95 0.3 110 60 9.5 5.4 V V mA 2.9 3.5 mA 1.72 2.1 mA 100 130 100 µA µA 25 40 55 mV -115 -6 -57 12 50 45 0.75 -86 3 30 25 15 1.1 1.45 mV mV ns ns ns µs 2 2.5 3 V 1.3 1.8 2.1 V 90 115 ns 0.01 0.02 0.5 3 1 2 V V A A Ω TSLEW RSLEW = 400kΩ 65 VG-L VG-H ILOAD = 10mA ILOAD = 0mA 4.9 Same as VG (low) V NOTE: 5) Guaranteed by characterization and design. MP6908 Rev. 1.1 5/27/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER Operating Current vs. Temperature Operating Current vs. Temperature VDD = 9V, CLOAD = 2.2nF, FSW = 100kHZ VDD = 5V, CLOAD = 2.2nF, FSW = 100kHz 3 1.9 2.95 1.85 2.9 1.8 2.85 1.75 ICC(mA) ICC(mA) TYPICAL PERFORMANCE CHARACTERISTICS 2.8 2.75 1.7 1.65 2.7 1.6 2.65 1.55 2.6 -50 -25 0 25 50 75 Temperature (°C) 100 1.5 125 -50 Quiescent Current vs. Temperature 108 106 102 TDon(ns) Iq(µA) 104 100 98 96 94 92 90 125 0 25 50 75 Temperature (°C) 100 125 36 34 32 30 28 26 24 22 20 18 16 14 12 10 -50 Turn-Off Delay vs. Temperature -25 0 25 50 75 Temperature (°C) 100 125 Forward Regulation Voltage (VSS - VD) vs. Temperature VDD = 9V, CLOAD = 2.2nF 36 34 32 30 28 26 24 22 20 18 16 14 12 10 50 48 46 44 Vfwd(mV) TDoff(ns) 100 VDD = 9V, CLOAD = 2.2nF 110 -25 0 25 50 75 Temperature (°C) Turn-On Delay vs. Temperature VDD = 5V -50 -25 42 40 38 36 34 32 -50 MP6908 Rev. 1.1 5/27/2020 -25 0 25 50 75 Temperature (°C) 100 125 30 -50 -25 0 25 50 75 Temperature (°C) www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 100 125 4 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER TYPICAL PERFORMANCE CHARACTERISTICS (continued) Turn-On Slew Rate Detection Timer vs. Temperature VDD Maximum Charging Current vs. Temperature RSLEW = 400kΩ VDD = 4V, VD = 30V 96 94 90 IVDD(mA) TSLEW(ns) 92 88 86 84 82 80 -50 -25 0 25 50 75 Temperature (°C) 100 125 70 65 60 55 50 45 40 35 30 25 20 15 10 -50 -25 0 25 50 75 Temperature (°C) 100 125 VDD Maximum Charging Current vs. Temperature IVDD(mA) VDD = 7V, HVC = 40V 100 95 90 85 80 75 70 65 60 55 50 45 40 -50 MP6908 Rev. 1.1 5/27/2020 -25 0 25 50 75 Temperature (°C) 100 125 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER TYPICAL PERFORMANCE CHARACTERISTICS (continued) Operation in 36W Flyback Application Operation in 36W Flyback Application VIN = 110VAC, VOUT = 12V, IOUT = 3A, HVC connected to VD VIN = 220VAC, VOUT = 12V, IOUT = 3A, HVC connected to VD CH1: VDS 20V/div. CH1: VDS 20V/div. CH3: VDD 5V/div. CH3: VDD 5V/div. CH2: VGS 5V/div. CH2: VGS 5V/div. 10µs/div. 10µs/div. Operation in 36W Flyback Application Operation in 36W Flyback Application VIN = 110VAC, VOUT = 12V, IOUT = 3A HVC connected to VSS VIN = 220VAC, VOUT = 12V, IOUT = 3A HVC connected to VSS CH1: VDS 20V/div. CH1: VDS 20V/div. CH3: VDD 5V/div. CH3: VDD 5V/div. CH2: VGS 5V/div. CH2: VGS 5V/div. 10µs/div. MP6908 Rev. 1.1 5/27/2020 10µs/div. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 6 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER PIN FUNCTIONS Pin # 1 2 Name HVC VSS 3 SLEW 4 VDD VG VD 5 6 MP6908 Rev. 1.1 5/27/2020 Description HV linear regulator input. Ground. VSS is also used as a MOSFET source sense reference for VD. Programming for turn-on signal slew rate detection. SLEW prevents the SR controller from turning on falsely by ringing below the turn-on threshold at VD in discontinuous conduction mode (DCM) and quasi-resonant mode. Any signal slower than the pre-set slew rate cannot turn on VG. Linear regulator output. VDD is the supply of the MP6908. Gate drive output. MOSFET drain voltage sense. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 7 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER BLOCK DIAGRAM VDD Charge Figure 1: Functional Block Diagram MP6908 Rev. 1.1 5/27/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 MP6908- FAST TURN-OFF INTELLIGENT RECTIFIER OPERATION The MP6908 supports operation in discontinuous conduction mode (DCM), continuous conduction mode (CCM), and quasiresonant flyback converters. The control circuitry controls the gate in forward mode and turns the gate off when the synchronous rectification (SR) MOSFET current drops to zero. VDD Generation The capacitor at VDD supplies power for the IC. It can be charged up by both HVC and VD. When VHVC