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RT7204E датащи(PDF) 32 Page - Richtek Technology Corporation |
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RT7204E датащи(HTML) 32 Page - Richtek Technology Corporation |
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32 / 45 page ![]() RT7204E F Copyright © 2024 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com RT7204E_DS-00 May 2024 32 15.8 I2C Communication In multi-port applications, the RT7204E can share the output power through I2C communication by connecting GPIO1 (SDA) and GPIO2 (SCL) to the other master controller, respectively. 15.9 Rectification Detection The RT7204E provides the VTR pin to sense the transformer voltage, which is the drain voltage of the SR MOSFET, as shown in Figure 6. By connecting the drain of SR MOSFET to the VTR pin through a divider resistor, the RT7204E can keep the divided voltage of SR VDS plateau and read the internal peak holding voltage, VVTR_PH, by ADC for VIN detection. With a proper setting of VTR blanking time, the RT7204E can distinguish between the PWM switching and the DCM ringing to prevent false detection of the PWM switching state, which is used to achieve LPS protection. VTR RVTR_L VVTR_EDGE RVTR_H VDS_SR VTR_OL 11-bit ADC MCU VOUT GND tVTR_L_BLK SR Controller VIN Detection PWM Switching Detection VTR_I Peak Holding Circuit VVTR_PH + - VTR_RST Figure 6. Rectification Detection |
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