General Description

The MY8103 is a common anode capable step-down

constant-current LED driver with internal MOSFET and

wide-range current sense. The MY8103 provides a

cost-effective design solution for architectural and

ambient lighting, LED bulbs, and other LED applications.

The MY8103 operates from a +8V to +65V input voltage

range and can provide an output current up to 1A.

Output current of MY8103 is set by an external resistor

connected between CSP and CSN pins. Dimming is

controlled by an external control signal to the VDIM pin.

The VDIM pin accepts either a DC voltage or a PWM

signal, and applying a voltage of 0.4V or lower to the

VDIM pin turns off the output current. The MY8103SE

has two error outputs to indicate various fault conditions.

Applications

Architectural, Industrial and Ambient Lighting

Indicator and Emergency Lighting

Decorative LED Lighting

High Power LED Lighting

Automotive Lighting

Constant Current Source

Features

✦ Support LED power up to 65W

✦ High-efficiency solution

✦ Internal 65V MOS switch

✦ Wide current sense common-mode range

from 0 to 65V

✦ Hysteretic control

✦ Up to 1MHz switching frequency

✦ ±5 output current accuracy

✦ Single DC/PWM input pin for dimming control

✦ 100mV current-sense reference

✦ Resistor-programmable constant LED current

✦ Inherent open LED protection

✦ Short LED protection

✦ Thermal-shutdown protection

✦ Over current protection

✦ Fault indication for various fault conditions

✦ Soft-start