Datasheet TPD7110F (Toshiba) - 4
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7.2. Reverse current blocking. Fig. 7.2 Operation Block (Normal On/Off, Reverse Current Blocking)
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TPD7110F
7.2. Reverse current blocking
This product blocks reverse current flowing from the load side back to the power supply, which can occur in redundant power systems. The MOSFET's drain voltage is input to the SENSE pin, and the source voltage is input to the SOURCE pin. These voltages are compared by a comparator circuit, and when the SENSE pin voltage exceeds the SOURCE pin voltage by VRC or more, the MOSFET is turned off. Afterward, when the voltage difference between the SENSE and SOURCE pins falls below VRCr, the MOSFET can be turned on or off again under the control of the IN pin. Reverse-current BATV GATE SOURCE SENSE AD O L Charge pump VDD VRC Logic Off-driver IN MCU
Fig. 7.2 Operation Block (Normal On/Off, Reverse Current Blocking) 7.3. Undervoltage Protection
This product stops operating when the power supply is in a low-voltage condition. When the IN pin is in a high state and the voltage between the GATE and SOURCE pins is at a high level, turning on the MOSFET, the voltage between the GATE and SOURCE pins transitions to a low level (VGSL) if the power supply voltage drops below VUVL, thereby turning off the MOSFET. Once the power supply voltage rises above VUVH, the device resumes normal on operation. Note that if the IN pin is in a low state and the MOSFET is off, it remains off regardless of the power supply voltage.
7.4. Overvoltage Protection
This product stops operating when the power supply is in an overvoltage condition. When the IN pin is in a high state and the voltage between the GATE and SOURCE pins is at a high level, turning on the MOSFET, the voltage between the GATE and SOURCE pins transitions to a low level (VGSL) if the power supply voltage exceeds VOVH, thereby turning off the MOSFET. Once the power supply voltage drops below VOVL, the device resumes normal on operation. Note that if the IN pin is in a low state and the MOSFET is off, it remains off regardless of the power supply voltage. ©202 5 4 2025-09-04 Toshiba Electronic Devices & Storage Corporation Rev. 1.0
7.2. Reverse current blocking
This product blocks reverse current flowing from the load side back to the power supply, which can occur in redundant power systems. The MOSFET's drain voltage is input to the SENSE pin, and the source voltage is input to the SOURCE pin. These voltages are compared by a comparator circuit, and when the SENSE pin voltage exceeds the SOURCE pin voltage by VRC or more, the MOSFET is turned off. Afterward, when the voltage difference between the SENSE and SOURCE pins falls below VRCr, the MOSFET can be turned on or off again under the control of the IN pin. Reverse-current BATV GATE SOURCE SENSE AD O L Charge pump VDD VRC Logic Off-driver IN MCU
Fig. 7.2 Operation Block (Normal On/Off, Reverse Current Blocking) 7.3. Undervoltage Protection
This product stops operating when the power supply is in a low-voltage condition. When the IN pin is in a high state and the voltage between the GATE and SOURCE pins is at a high level, turning on the MOSFET, the voltage between the GATE and SOURCE pins transitions to a low level (VGSL) if the power supply voltage drops below VUVL, thereby turning off the MOSFET. Once the power supply voltage rises above VUVH, the device resumes normal on operation. Note that if the IN pin is in a low state and the MOSFET is off, it remains off regardless of the power supply voltage.
7.4. Overvoltage Protection
This product stops operating when the power supply is in an overvoltage condition. When the IN pin is in a high state and the voltage between the GATE and SOURCE pins is at a high level, turning on the MOSFET, the voltage between the GATE and SOURCE pins transitions to a low level (VGSL) if the power supply voltage exceeds VOVH, thereby turning off the MOSFET. Once the power supply voltage drops below VOVL, the device resumes normal on operation. Note that if the IN pin is in a low state and the MOSFET is off, it remains off regardless of the power supply voltage. ©202 5 4 2025-09-04 Toshiba Electronic Devices & Storage Corporation Rev. 1.0