zxct1032 Zetex Semiconductors plc., zxct1032 Datasheet - Page 2

• Manufacturer Part Number: zxct1032
• Description: Zxct1032 - High-side Inrush And Current Limit Controller
• Manufacturer: Zetex Semiconductors plc.

Typical application circuit
Pin description
Issue 4 - June 2007
© Zetex Semiconductors plc 2007
GND
V
Pin
1
2
3
4
5
6
7
8
IN
3
Name
Drive
GND
ISET
Flag
N/C
IN+
I SET
IN-
C
GND
IN+
T
8
1
ZXCT
R
1032
SENSE
Description
Ground reference for I
device. No other pin should go below this voltage.
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.
Determines the load current trip level or constant current level. This can
be driven via a DC voltage or via a µC PWM output.
An input <100mV will disable the high-side switch (i.e. set I
If left open-circuit, an accurate internal DC reference of 2.1V and source
impedance of 50k
drivers must take this reference into account.)
This is an active low open collector output that goes low whenever the
current limit set by the choice of R
event of a shorted load.
This is the output drive pin to the external high side referred switch on
the ZXCT1032, capable of driving PMOS and PNP transistors.
The load referred input to the current monitor control loop.
Not connected
Acts as both the supply pin to the ZXCT1032 and the supply referred
sense input to the current monitor control loop.
C
2
T
µC
C
T
V
IN-
SENSE
Drive
Flag
6
4
= (V
5
ISET
is used to set the voltage on this pin. (External
-150mV)/10
SET
Load
2
and Flag pins. Most negative terminal of the
SENSE
Pinout connections
GND-
ISET
and I
Flag
C
T
SET
1
2
3
4
is reached or in the
Top view
SO8
ZXCT1032
www.zetex.com
OUT
8
7
6
5
= 0)
IN+
N/C
IN-
Drive