FOD3181(2007) Ver la hoja de datos (PDF) - Fairchild Semiconductor

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Fabricante

FOD3181
(Rev.:2007)

0.5A Ouput Current, High Speed MOSFET Gate Driver Optocoupler

Fairchild Semiconductor 

IOH and IOL Test Conditions

This device is tested and specified when driving a complex

reactive load. The load consists of a capacitor in the series with

a current limiting resistor. The capacitor represents the gate to

source capacitance of a power MOSFET transistor. The test

load is a 0.03uF capacitor in series with an 40Ω resistor. The

LED test frequency is 10.0kHz with a 50% duty cycle. The com-

bined IOH and IOL output load current duty factor is 0.6% at the

test frequency.

Figure 14 illustrates the relationship of the LED input drive

current and the device’s output voltage and sourcing and sink-

ing currents. The 0.03µF capacitor load represents the gate to

source capacitance of a very large power MOSFET transistor.

A single supply voltage of 20V is used in the evaluation.

Figure 15 shows the test schematic to evaluate the output volt-

age and sourcing and sinking capability of the device. The IOH

and IOL are measured at the peak of their respective current

pulses.

LED

20V

OUTPUT

0

Load

Current

IF = 8mA

ON

P-Channel (ON)

IOH = 0.5A

OFF

N-Channel (ON)

IOL = 0.5A

1µs/Div

Figure 14. FOD 3180 Output Current and Output Voltage vs. LED Drive

Pulse

Generator

1

2

IFMON

3

100Ω

100Ω

4

FOD3181

8

7 VO

0.33µF

6

0.1µF

IOMON

40Ω

22µF

5

Figure 15. Test Schematic

11

www.fairchildsemi.com

FOD3181 Rev. 1.0.3

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