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FAN5701 — Compact 6-LED Driver for Mobile Platforms
March 2013
FAN5701 — Compact 6-LED Driver for Mobile Platforms
Features
Six (6) Parallel LEDs (up to 30mA each)
Total Package Load Current Capability: 180mA
Two Default Groups of Four (4) and Two (2) LEDs for
Main and Sub-Display Lighting with Individual PWM
Dimming Controls that Operate up to 20kHz
>600:1 Dimming Ratio for 100Hz PWM Frequency
Up to 92% Efficiency
Built-in 1.5x Charge Pump with Low-Dropout Bypass
Switch
Wide Input Range: 2.7V to 5.5V
V
OUT
Over-Voltage and Short-Circuit Protection
Over-Temperature Protection
1.2MHz Switching Frequency for Small-Sized
Capacitors
16-Bump 1.61mm x 1.61mm WLCSP (0.6mm Height)
16-Lead 3.0mm x 3.0mm UMLP (0.55mm Height)
Description
The FAN5701 is a highly integrated and efficient charge-
pump-based multi-LED driver. The device can drive up to six
LEDs in parallel with a total output current of 180mA.
The FAN5701 is capable of driving a primary display
backlight requiring four to six LEDs. When more than four
LEDs are needed for backlighting, the FAN5701’s two PWM
dimming inputs can be connected together to provide the
proper dimming control for all six LEDs. When a primary and
sub-display is needed, the FAN5701 can be controlled such
that each group can be dimmed independently. For candy-
bar phones requiring a primary display and keypad lighting,
the FAN5701 offers a simple, and compact lighting solution.
Regulated internal current sinks deliver excellent current and
brightness matching to all six LEDs. The device provides
excellent efficiency without an inductor by operating the
charge pump in 1.5x or pass-through modes.
The FAN5701 can be ordered with I
SET
values of 30mA,
20mA, 15mA, or 8mA and available in WLCSP or ultra-thin
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