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Photovoltaic-Output Photocouplers

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In a photovoltaic-output photocoupler, the light emitted by an LED is received by a photodiode array (PDA), which converts it into an output voltage.
Photovoltaic-output photocouplers can be used to create a MOSFET gate driver without using an external secondary-side power supply.
Toshiba offers general-purpose photovoltaic-output photocouplers and those having an internal shunt resistor for gate capacitance discharge.

List of photovoltaic-output photocouplers

Isolation Voltage, BVs (Vrms) 1500 2500 3750
Internal Circuit Short-Circuit Current,
Isc (μA)
Open-Circuit Voltage,
VOC (V)

SSOP4

MFSOP6

DIP6

SO6
5 7 TLP3904 TLP3902
12 7 TLP190B TLP590B TLP3905
20 7 TLP3914
4 30 TLP3924

With discharge resistance
24 7 TLP191B TLP591B

With discharge control circuit
12 7 TLP3906
Product List

List of Photovoltaic-Output Photocouplers
You can search the entire list of photovoltaic-Output Photocouplers, based on characteristics.

Features of Photovoltaic-Output Photocouplers

  • Can drive a MOSFET gate without using an external secondary-side power supply
  • Can reduce the MOSFET turn-off time due to the shunt resistor for gate capacitance discharge
  • Housed in a small SSOP package for board space saving

1. Isolation between signal and power lines (for noise reduction)

In a photovoltaic-output photocoupler, the light emitted by an LED is received by a PDA, which in turn converts it into a voltage to drive the gate of a MOSFET. Since the input (LED) and output (PDA) sides of the photocoupler are electrically isolated, it reduces the transfer of noise generated on the MOSFET side to the CPU side.

TLP3914 IF-VOC Characteristics
TLP3914 IF-VOC Characteristics

MOSFET Gate Driver Example for Noise Reduction
MOSFET Gate Driver Example for Noise Reduction

Other Photocouplers/Photorelays

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