ST ILL014V1 User Manual

Features

STEVAL-ILL014V1

Evaluation board for the STCS1 constant current

controller for high brightness LEDs

Data Brief

■ Input voltage (V

■ Less than 0.5 V voltage overhead

■ Up to 1.5 A output current

■ PWM dimming pin

■ Shutdown pin

■ LED disconnection diagnostic

): 4.5 V to 40 V

Description

The best way to power LEDs is to control the forward current in order to achieve good matching of light output. LED manufacturers specify the characteristics (such as lumens, beam pattern, color) of their devices at a specified forward current.

The STEVAL-ILL014V1 evaluation board demonstrates the operation of the STCS1 constant current LED driver. The STCS1 is capable of controlling the LED current under several application conditions, while also providing useful features that make it suitable for different applications such as advertising signs, automotive interior and exterior lighting, and emergency vehicle warning lights.

STEVAL-ILL014V1

May 2008 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

Board schematic STEVAL-ILL014V1

Vcc

PWM

DRAIN

GND

SLOPE

DISC

STCS1A

ope

100nF

ope

1nF

Rsense

0.33, 1%, 0805

Cbypass

0.1uF,50V

BAT46

PWM

GND

100

PWM

Test point

2N7002

GND

R15

10k

GND

IN PWM

Vcc

NTC

10k

R17

1.8k

180

LH R974

VIN

VOUT

L7805

1uF, 50V

This subcircuit is present on EVB

only if the LED is mounted.

0.33uF, 50V

100nF, 6.3V

LUMILEDS LXHL PW09

Vcc

1 Board schematic

Figure 1. Schematic diagram

Vcc

GND