LM3432BSQ National Semiconductor, LM3432BSQ Datasheet - Page 4

• Manufacturer Part Number: LM3432BSQ
• Description: LM3432/LM3432B 6-Channel Current Regulator for LED Backlight Application; Package: LLP; No of Pins: 24; Qty per Container: 1000; Container: Reel
• Manufacturer: National Semiconductor

www.national.com
Pin Descriptions
12,13,15,17,19,20
11,14,16,18,21,23
LLP-24
EP
10
22
24
1
2
3
4
5
6
7
8
9
Pin Number
2, 3, 4, 16, 18, 20, 22,
15, 17, 19, 21, 23, 25
eTSSOP-28
27, 28
24, 26
EP
10
11
12
13
14
5
6
7
8
9
1
IOUT1-6
FAULTb
MODE
AGND
CDHC
VDHC
PGND
Name
OTMb
IREF
VCC
DIM
VIN
NC
EN
EP
4
Description
Internal linear regulator output, needs 680nF minimum
for stability.
I
program the string current.
Analog ground
An external capacitor to ground programs the Dynamic
Headroom Control (DHC) response time constant.
DHC voltage output. Connecting this output through a
gain setting resistor to the DHC pin of National
Semiconductor's LM3430 enables the DHC function.
Device Enable, active HIGH.
Dimming mode select pin. Short to ground for Digital
PWM dimming or connect to an external capacitor to
ground for analog dimming.
Digital PWM or Analog voltage input for IOUT duty cycle.
Open drain active LOW output for output fault.
Open drain active LOW over temperature warning
output.
Constant current sink outputs, adjustable 15mA to
40mA, voltage across this pin can be up to 80V max.
Power Ground.
Supply voltage input, from 6V to 40V.
No connection and should be left open.
Thermal connection pad, connect directly to GND.
OUT
current setting pin. An external resistor is used to