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Datasheet 4 Rev. 3.1, 2013-02-21

BCR450

LED Driver IC

BCR450 Power LED Driver IC

1 BCR450 Power LED Driver IC

Features

• Low voltage drop across sense resistor, 0.15 V typical

• High output current precision

• Operating voltage fro 8 to 27 V

• Over voltage protection

• Overtemperature current foldback and Thermal shut down

function

• Adjustable Constant LED Current up to 85 mA in stand alone

op

eration

• Precise Internal bandgap enables High output current accuracy

• Up to 2.5 A LED current possible by using external transistor

• EN Input for PWM LED brightness control and On/Off control

• Very Low Standby Current

• Minimum number of external components required, no inductors

• Very small SC-74 package: 2.9 mm x 2.5 mm x 1.1 mm

Benefits

• High level of colour control due to high output current precision

• Small space requirement

• No electro- magnetic interference

• Active thermal monitoring of chip and LED temperature with

cur

rent fold- back to avoid thermal overstress

• Low cost device

• Scalable output stage optimizing c

ost and space

Typical Applications

• General lighting e.g. retrofits

• Architectural lighting, Medic

al and Dental lighting

• Transportation like train and aircraft lighting

• Strobe lighting

• Universal constant current source

• Signal and marker lights for orientation or navigation

• LED controller for industrial applications

, not qualified to AECQ-

100

3

2

1

4

5

6

6

BCR450

Typical 12V High Power LED Application

Vs

BCX68-25

1

3

2,5

4

350mA

2 Description

The BCR450 is a LED driver IC optimized for usage with an external power transistor for driving LEDs above

100

mA. For currents up to 85 mA the BCR450 can be used in stand alone operation. The output current level can

be

adjusted with an external sense resistor.

The IC can be switched on and off by an external signal, which

is also suitable to regulate brightness of the LEDs

by PWM dimming.

The precise internal bandgap s

tabilizes the circuit and provides stable current conditions over temperature range.

Additional features are included to protect the LEDs from overload, short circuit events as well as from over

voltage

. The LEDs can be also protected against thermal overload by thermally coupling the LEDs to the BCR450.

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