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RT7204E 데이터시트(PDF) 32 Page - Richtek Technology Corporation

부품명 RT7204E
상세설명  High-Integration USB Multi-Protocol Controller with Rectification Detection
PDF  45 Pages
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제조업체  RICHTEK [Richtek Technology Corporation]
홈페이지  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT7204E 데이터시트(HTML) 32 Page - Richtek Technology Corporation

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RT7204E
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is a registered trademark of Richtek Technology Corporation.
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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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