ZXCT1032N8TA View Datasheet(PDF) - Diodes Incorporated.

Part Name

Description

Manufacturer

ZXCT1032N8TA

High-side inrush controller and electronic fuse

Diodes Incorporated. 

Typical application circuit

VIN

GND

8

IN+

ISET

3

R SENSE

6

IN-

ZXCT Drive 5

1032

GND

1

CT Flag

2

4

CT

µC

Load

ZXCT1032

Pinout connections

SO8

GND- 1

CT 2

ISET 3

Flag 4

Top view

8 IN+

7 N/C

6 IN-

5 Drive

Pin description

Pin

Name Description

1

GND Ground reference for ISET and Flag pins. Most negative terminal of the

device. No other pin should go below this voltage.

2

CT

An external capacitor is connected to this pin and is used to determine

the period for constant-current mode and the timeout before restarting.

To reduce excessive heating during the soft start mode capacitors less

than 220nF are reocmmended.

3

ISET Determines the load current trip level or constant current level. This can

be driven via a DC voltage or via a µC PWM output.

VSENSE = (VISET-150mV)/10

An input <100mV will disable the high-side switch (i.e. set IOUT = 0)

If left open-circuit, an accurate internal DC reference of 2.1V and source

impedance of 50k⍀ is used to set the voltage on this pin. (External

drivers must take this reference into account.)

4

Flag This is an active low open collector output that goes low whenever the

current limit set by the choice of RSENSE and ISET is reached or in the

event of a shorted load.

5

Drive This is the output drive pin to the external high side referred switch on

the ZXCT1032, capable of driving PMOS and PNP transistors.

6

IN-

The load referred input to the current monitor control loop.

7

N/C

Not connected

8

IN+

Acts as both the supply pin to the ZXCT1032 and the supply referred

sense input to the current monitor control loop.

Issue 3 - April 2007

2

© Zetex Semiconductors plc 2007

www.zetex.com

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