AUIR08152S

7

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August. 27, 2014

Application Tips

The AUIR08152S features a self-clamping gate protection in case of the auxiliary power supply disappears.

A resistor is pulling up the gate of the OUTL internal power MOSFET to keep OutL pulled down until a minimum

Vcc is applied, when Vcc disappears (< about 3V) then the Vgate is clamped via the OUTH ESD diode.

In this situation forcing OutL high injects current into the pin that charges the Vcc decoupling capacitor and

reactivates the internal OUTL output power MOSFET (for more info see the Functional Block Diagram).

a)

If no negative bias is used, Vee shall be connected to Gnd

b)

OUTH and OUTL pins shall never be shorted together

c)

Decoupling capacitors shall be ceramic types and implemented

as close as possible of the AUIR08152S supply pins

d)

The decoupling capacitors shall be at least 40 times bigger than

the max. Cload and of low ESR type, in order to avoid any Vccuv

oscillations

e)

IN and LPM pins shall never be left open