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RT9629B Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9629B Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 14 page  RT9629B ® DS9629B-06 July 2015 www.richtek.com 1 Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. © Triple-Channel Synchronous Rectified Buck MOSFET Driver General Description The RT9629B is a high frequency, triple-channel synchronous rectified buck MOSFET driver specifically designed to drive six power N-MOSFETs. The part is promoted to pair with Richtek's multiphase buck PWM controller family for high-density power supply implementation. The output drivers of RT9629B can efficiently switch power MOSFETs at frequency 300kHz typically. Operating in higher frequency should consider the thermal dissipation carefully. The device implements bootstrapping on the upper gate with only an external capacitor and a diode required. This reduces circuit complexity and allows the use of higher performance, cost effective N-MOSFETs. All drivers incorporate adaptive shoot-through protection to prevent upper and lower MOSFETs from conducting simultaneously and shorting the input supply. The RT9629B has also detected the fault condition during initial start-up before the multi-phase PWM controller takes control. As a result, the input supply will latch into the shutdown state. The RT9629B comes in a small footprint package with WQFN-24L 5x5 package. Applications Core Voltage Supplies for Desktop, Motherboard CPU High Frequency Low Profile DC/DC Converters High Current Low Voltage DC/DC Converters Core Voltage Supplies for GFX Card Features Drive Six N-MOSFETs for 3-Phase Buck PWM Control Shoot Through Protection Embedded Bootstrap Diode Support High Switching Frequency Fast Output Rising Time Tri-State PWM Input for Output Shutdown Small 24-Lead WQFN Package RoHS Compliant and Halogen Free Simplified Application Circuit Marking Information RT9629BZQW : Product Number YMDNN : Date Code RT9629B ZQW YMDNN VCCx PHASE1 RT9629B 12V VOUT L1 VIN L2 PHASE2 PWM1 PWM2 PWM1 PWM2 GND L3 PHASE3 PWM3 PWM3 |
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