IXHQ100PI datasheet(5/9 Pages) IXYS

5 / 9 page

Frequency (Hz)

1e+1 1e+2 1e+3 1e+4 1e+5 1e+6

-70

-60

-50

-40

-30

-20

-10

Pin Descriptions

IXHQ 100PI

IXHQ 100SI

Supply Voltage (V)

100

120

Graph 9: Gate Voltage vs. Supply Voltage

Graph 10: Typical Noise Attenuation

PIN #

SYMBOL

FUNCTION

DESCRIPTION

INV

Invert

Input

The invert input controls GSNSin’s polarity. When

invert input is high compared to AGND, then GSNSin

low indicates an insertion/removal event. When invert

input is low, then GSNSin high indicates an

insertion/removal event.

GSNSin

Ground Sense

Input

The INV pin controls the polarity sense of this input.

A 3uA internal pull-up current source causes logic

high when there is no connection at this pin. With INV

low or connected to AGND, a GSNSin low (or

connected to AGND) will keep RSTout and GATE

low, and the external power switch, Q1, off. A

disconnected GSNSin pin or when Vcc is applied to it

will allow normal operation

VCCin

Supply Voltage

Positive power-supply voltage input.

SHNToff

Shunt Off

This pin serves to control the enabling of the shunt

circuit. When the pin is high compared to AGND, then

the shunt regulator is in off position. A low level at

this pin activates the shunt regulator.

CAPin

Active low-

pass filter

capacitor input

The output of the power active filter tracks this pin.

Adding an external RC network matching the input

noise with respect to the 3db point of the filter could

reduce the noise to a minimum.

VDROP

Active filter

offset voltage

This pin sets the drop out MOSFET voltage across the

active filter.

SLOPE

Slope input

This input controls the current slope during power up

and

controls

inrush

currents.

Adding

external

capacitors to this pin allow regulation and adjustment

of the rate of the current slope.

OFFTM

Off-time

The OFFTM pin sets the delay time between power-

down and restart of IXHQ100. Delay time can be

increased by adding external capacitors to this pin.

AGND

Ground

The IXHQ100 system zero reference pin.

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