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FAN5346 — Series Boost LED Driver with PWM Dimming Interface
June 2012
FAN5346
Series Boost LED Driver with PWM Dimming Interface
Features
Asynchronous Boost Converter
Drives LEDs in Series:
−
−
FAN5346S20X: 20V Output
FAN5346S30X: 30V Output
Description
The FAN5346 is an asynchronous constant-current LED
driver that drives LEDs in series to ensure equal brightness
for all the LEDs. FAN5346S20X has an output voltage of
20V and can drive up to 5 LEDs in series. FAN5346S30X
has an output voltage of 30V and up to 8 LEDs in series.
Optimized for small form-factor applications, the 1.2MHz
fixed switching frequency allows the use of small inductors
and capacitors.
The FAN5346 uses a PWM dimming control interface to set
the brightness levels of the LEDs. A PWM signal of 5kHz to
100kHz is applied to the EN pin.
For safety, the device features integrated over-voltage, over-
current, short-circuit detection, and thermal-shutdown
protections. In addition, input under-voltage lockout
protection is triggered if the battery voltage is too low.
The FAN5346 is available in a 6-lead SSOT23 package. It is
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