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