Datasheet LM3432BSQE/NOPB - National Semiconductor

Part Number: LM3432BSQE/NOPB

Detailed Description

Manufacturer: National Semiconductor

Docket:
LM3432/LM3432B 6-Channel Current Regulator for LED Backlight Application
May 22, 2008
LM3432/LM3432B 6-Channel Current Regulator for LED Backlight Application
General Description
The LM3432/LM3432B are 6-channel high voltage current regulators which provide a simple solution for LED backlight applications.

These devices incorporate six individual current regulator channels to give accurate driving current for each LED string. The string-to-string tolerance is kept within ±2.0%. Additionally, the Dynamic Headroom Control output can communicate with a LM3430 boost regulator to adjust the LED supply voltage to the lowest level needed to keep the string current in regulation, yielding optimal overall system efficiency. The 6-channel current sink can be adjusted from 15mA to 40mA by an external resistor. Their output drivers can withstand up to 80V. Digital PWM or analog voltage signal can be used to control the duty cycle of all the channels. With a fast current switching slew rate, tr =

Specifications:

Dimming Control Type: PWM
Input Voltage: 6 V to 40 V
MSL: MSL 1 - Unlimited
Number of Outputs: 6
Operating Temperature Range: -40°C to +125°C
Output Current: 240 mA
Output Voltage: 80 V
Package / Case: LLP
Topology: Boost (Step Up)

RoHS: Yes