TS19460_15 Datasheet, PDF (1/9 Pages) Taiwan Semiconductor Company, Ltd – AC/DC WLED Driver with Average-Mode Constant Current Control

TS19460
Taiwan Semiconductor
AC/DC WLED Driver with Average-Mode
Constant Current Control
DESCRIPTION
The TS19460 is an average current mode control LED
driver IC operating in a constant off-time mode. It
greatly improves accuracy, line and load regulation of
the LED current without any need for loop
compensation or high-side current sensing. The output
LED current accuracy is at ±5%, and it is equipped
with current limit comparator for hiccup mode output
short circuit protection.
The TS19460 can be powered from an 8V~450V
supply. A PWM dimming input is provided that
accepts an external control TTL compatible signal.
The output current can be programmed by an
internal 250mV reference, or controlled externally
through a 0~1.5V dimming input. The TS19460 is
ideally suited for buck LED drivers and is requires
only free external components (apart from the power
stage) to produce a controlled LED current making it
an ideal solution for low cost LED drivers.
FEATURES
● Fast average current controller
● Programmable constant off-time switching
● Linear and PWM dimming capability
● Requires few external components for operation
● Output short circuit protection with skip mode
● Pin –compatible with TS19450CS
APPLICATION
● DC/DC or AC/DC LED driver applications
● RGB backlighting LED driver
● Back lighting of flat panel displays
● General purpose constant current source
● Signage and decorative LED lighting
● LED street lighting
SOP-8
Pin Definition:
1. VIN
8. RT
2. CS
7. LD
3. GND 6. VDD
4. Gate 5. PWMD
Notes: Moisture sensitivity level: level 3. Per J-STD-020
TYPICAL APPLICATION CIRCUIT
Document Number: DS_P0000188
1
Version: D15