# PT6905 High Brightness LED Driver

## DESCRIPTION

PT6905 is a high brightness LED driver IC with three or two-stage dimming capability. It supports input voltages from 7V to 36V and can drive up to 800mA. It utilizes constant current control for stable light output and incorporates overcurrent, over-temperature, open circuit, and under voltage lockout protection. Dimming is achieved through ON/OFF switching, cycling through 1/3, 2/3, and full current levels.

## APPLICATIONS

· DC/DC LED driver
· Low voltage industrial LED lighting
· Low voltage halogen replacement LEDs
· Decorative LED lighting

## FEATURES

· Three/Two-stage dimming
· >90% Efficiency
· Wide input voltage: 7V - 36V
· Constant current driver
· Up to 0.8A output
· Thermal shutdown protection
· Over current protection
· Open circuit protection
· Under voltage lockout
· Internal 40V NMOS switch

## ORDER INFORMATION

Valid Part Number	Package Type	Top Code
PT6905-01	8 Pins, SOP	PT6905-01
PT6905-02	8 Pins, SOP	PT6905-02
PT6905-03	8 Pins, SOP	PT6905-03
PT6905-04	8 Pins, SOP	PT6905-04

## PIN CONFIGURATION

## PIN DESCRIPTION

Pin Name	Description	Pin No.
RT	Internal NMOS off-time setting	1
DLY	Delay for internal switch activation	2
CS	LED string current sense	3
GND	Ground	4
SW	Internal switch	5
VIN	Positive input supply voltage	6
DET	UVLO & ON/OFF detection	7
VRG	Current status register power supply	8