Design contains obsolete parts

ADD5211CP-EVALZ: 200mA @ 62V (90V Max), 4.5 ~ 40V in

Summary

The ADD5211 is a four-string, white LED driver for backlight applications based on high efficiency, current mode, step-up converter technology. The boost controller drives an external MOSFET switch for step-up regulation from an input voltage of 4.5V to 40V and a pin adjustable operating frequency from 200 kHz to 1.2 MHz. An adjustable UVLO function is implemented to reduce input current during power-off.

The ADD5211 provides four regulated current sinks for uniform brightness intensity. Each current sink can be driven from 40 mA to 200 mA; the LED driving current is pin adjustable using an external resistor. With an input PWM interface, the ADD5211 drives up to four parallel strings of multiple series connected LEDs.

Additional features include LED short protection, LED open protection, boost output short protection, overvoltage protection, cycle-by-cycle current limit, and thermal shutdown for both the IC and the LED array. An open-drain fault output is also included. A programmable soft start is implemented to reduce inrush current during startup.

Specifications

Manufacturer	Analog Devices Inc.
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	ADD5211CP-EVALZ-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Board not Stocked
Voltage In	4.5 ~ 40 V
Topology	Step Up
Current Out	200 mA
Voltage Out (Max)	90 V
Outputs and Type	4 Non-Isolated
Efficiency @ Conditions	- Not Given
Features	Current Limit (Adj. or Fixed) Dimming Control Open Circuit Protection PWM Interface Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	200 kHz ~ 1.2 MHz
Component Count + Extras	51 + 45
Design Author	Analog Devices
Application / Target Market	LCD Backlighting LCD TV / Monitor Lighting: LED Commercial Lighting
Main I.C. Base Part	ADD5211
Date Created By Author	2011-01
Date Added To Library	2015-06