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RT9610AGQW Datasheet(PDF) 4 Page - Richtek Technology Corporation |
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RT9610AGQW Datasheet(HTML) 4 Page - Richtek Technology Corporation |
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4 / 15 page  RT9610A/B 4 DS9610A/B-06 September 2015 www.richtek.com © Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Operation POR (Power On Reset) POR block detects the voltage at the VCC pin. When the VCC pin voltage is higher than POR rising threshold, the POR pin output voltage (POR output) is high. POR output is low when VCC is not higher than POR rising threshold. When the POR pin voltage is high, UGATE and LGATE can be controlled by PWM input voltage. If the POR pin voltage is low, both UGATE and LGATE will be pulled to low. Tri-State Detect When both POR output and EN pin voltages are high, UGATE and LGATE can be controlled by PWM input. There are three PWM input modes which are high, low, and shutdown state. If PWM input is within the shutdown window, both UGATE and LGATE outputs are low. When PWM input is higher than its rising threshold, UGATE is high and LGATE is low. When PWM input is lower than its falling threshold, UGATE is low and LGATE is high. Control Logic Control logic block detects whether high side MOSFET is turned off by monitoring (UGATE - PHASE) voltages below 1.1V or PHASE voltage below 2V. To prevent the overlap of the gate drives during the UGATE pulls low and the LGATE pulls high, low side MOSFET can be turned on only after high side MOSFET is effectively turned off. Shoot-Through Protection Shoot-through protection block implements the dead-time when both high side and low side MOSFETs are turned off. With shoot-through protection block, high side and low side MOSFETs are never turned on simultaneously. Thus, shoot-through between high side and low side MOSFETs is prevented. |
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