DD313-4 Datasheet, PDF (9/15 Pages) Silicon Touch Technology Inc. – LED open circuit detection

Functional Block Diagram
PWM IN
VCC
Supply Voltage Regulator
Pre-Regulator
& Voltage
Reference
Temperature
Sensor
Fault
Detection
Internal
LDO
Q1
+
--
EN
GND
DD313-4
ALARM
OUT
IOUT
REXT
Detailed Description
PWM Dimming
The DD313-4 supports PWM dimming. The dimming information is retrieved from PWM
IN into which a microcontroller sends a PWM signal with allowable frequency up to 1 MHz. If
the PWM IN pin is floating, the driver is always on. Otherwise the driver is modulated by
patterns appearing in the PWM IN pin.
40V Adjustable Current Sink Linear LED Driver
Version:PRE.002
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