FAN5340: LED Driver, Synchronous Boost, with PWM Dimming Interface
Description: The FAN5340 is a synchronous constant-current LED ...
The FAN5340 is a synchronous constant-current LED driver capable of efficiently delivering up to 500mW to a string of up to four LEDs in series. Optimized for small form-factor applications, the 1.2MHz fixed switching frequency allows the use of chip inductors and capacitors.
For safety, the device features integrated short-circuit detection plus over-voltage and thermal shutdown protections. In addition, input under-voltage lockout protection is triggered if the battery voltage is low.
Brightness (dimming) control is implemented by applying a PWM signal of 300Hz to 1kHz on the EN pin. During shutdown, the FAN5340 disconnects the LED anodes from the output of the boost regulator, which holds the boost regulator’s voltage on COUT, reducing audible noise from the PWM dimming, and removing power from the LED string.
Synchronous Current-Mode Boost Converter
Up to 500 mW Output Power
Supports 2, 3, or 4 LEDs in Series
2.7 V to 4.8 V Input Voltage Range
1.2 MHz Fixed Switching Frequency
1 mA Maximum Quiescent Current
Input Under-Voltage Lockout (UVLO)
Output Over-Voltage Protection (OVP)
Thermal Shutdown (TSD) Protection
Technical Documentation & Design Resources
Availability and Samples
Compliance: Pb-free Halide free
Description: LED Driver, Synchronous Boost, with PWM Dimming Interface
Package Type: WLCSP-8
Package Case Outline: 567PZ
Container Type: REEL
Container Qty: 3000
VI Max (V):
IO Max (mA):
LEDs in Series, Max #:
LEDs in Parallel, Max #: