The charging control IC (e.g., U9300 Hydra) validates this voltage via signals like CHARGER_VBUS_VALID .
: The RVP (Reverse Voltage Protection) ensures that if a faulty cable or charger is used, the high voltage does not reach the CPU or PMIC. pp-var-usb-rvp
Next, verify whether the system is responding to the validation line by checking the power gate enable pin ( PWR_GATE_EN_VBUS_1_VALID ). Locate the designated test point on the logic board. Measure the voltage with the charging cable plugged in. The charging control IC (e
: Before allowing high current to flow into the battery, the RVP circuit checks for shorts or surges. Locate the designated test point on the logic board
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: Reverse Voltage Protection (A safety mechanism to prevent damage if power flows the wrong way) Technical Analysis of the "Piece"
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