Preliminary

TS19453

AC/DC Programmable Current WLED Driver

w/PWM Dimming Control

1/7

Version: Preliminary

SOP-8

General Description

The TS19453 is a PWM high efficiency programmable current LED driver with PWM dimming control IC. It allows

efficient operation of LED strings from voltage source ranging up to 400VDC. It includes an internal high voltage

switching MOSFET controlled with fixed off-time of approximately 12µS.

The LED string is driven at constant current, thus providing constant light output and enhanced reliability. The

output current is internally programmable up to 50mA. The peak current control scheme provides good regulation

of the output current throughout the universal AC line voltage range of 85~264VAC or DC input voltage of

20~400V

Features

●

Adjust constant output current up to 50mA(typ)

●

Universal 85~264VAC operation

●

Over temperature protection with hysteresis

●

PWM dimming

●

Fixed off-time buck converter

●

Internal 475V power MOSFET

Typical Application Circuit

Application

●

Decorating LED lighting

●

LED lamps with AC or DC operation.

Ordering Information

Part No.

Package

Packing

TS19453CS RLG

SOP-8

2.5Kpcs/13” Reel

Note: “G” denote for Halogen Free Product

Absolute Maximum Rating

Parameter

Symbol

Limit

Unit

Input Voltage Range

~ +475

V

VDD to GND

~ 9

uA

PMWD, Rsense to GND

uA

Internally Limited

W

Operating Ambient Temperature

-40 to +85

ºC

Storage Temperature Range

-65 to +150

Thermal Resistance – Junction to Ambient

160

Note: Stresses beyond those listed under ”Absolute Maximum Ratings” may cause permanent damage to the

device. These are stress rating only, and functional operation of the device at these or any other conditions beyond

those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect device reliability.

Pin Definition:

1. Rsense

8. Drain

2. Ground

7. Drain

3. PWMD

6. Drain

4. Vdd

5. Ground