August 2010
FAN5702
Configurable 180mA 6-LED Driver with I2C Control
Features
Description
The FAN5702 is a highly integrated and configurable charge-
pump-based multi-LED driver. The device can drive up to six
LEDs in parallel with a total output current of 180mA.
Regulated internal current sinks deliver excellent current and
brightness matching to all LEDs.
Six (6) Parallel LEDs (up to 30mA Each)
Total Package Load Current Capability: 180mA
Group from 2 to 6 LEDs for Flexible Backlighting
I2C Interface for Easy Programming
The FAN5702 has an I2C interface that allows the user to
independently control the brightness with a default grouping of
2,1,1,1,1 for a maximum of five independent lighting channels.
The LED driver can be programmed in a multitude of
configurations to address broad lighting requirements for
different platforms. Each LED can be configured through I2C
as five independent channels (Group A has two LEDs by
default) or any additional LEDs can join Group A to increase
the backlighting needs as the display size increases. The
device offers a second dimming control using the EN/PWM
pin. Applying a PWM dimming signal to this pin allows control
of the dimming of Group A LEDs so that the average current is
the linear value multiplied by the PWM dimming duty-cycle.
>600:1 Dimming Ratio for 100Hz PWM Frequency
Logarithmically Controlled Dimming with 64 Steps
Secondary Brightness Control Using PWM Dimming
up to 20kHz in Conjunction with I2C Dimming
− Dynamic Backlight Control (DBC) to Reduce Current
Consumption
Up to 92% Efficiency
Built-in 1.5x Charge Pump with Low Drop-Out Bypass
Switch and automatic switching to 1x mode
1.2MHz Switching Frequency for Small-Sized Capacitors
16-Bump 1.6mm × 1.6mm WLCSP (0.6mm Height)
16-Lead 3.0mm x 3.0mm UMLP (0.55mm Height)
The device provides excellent efficiency, without an inductor,
by operating the charge pump in 1.5x or pass-through mode.
The FAN5702 can be ordered with default ISET values of
30mA, 20mA, 15mA, or 8mA. The default ISET is always
determined by the ISET ordered (see Ordering Information).
Applications
LCD Backlighting
Mobile Handsets / Smartphones
Portable Media Players
Ordering Information
LED Current
(ISET
Temperature
Part Number
Package
Packing
)
Range
FAN5702UC30X
FAN5702UC20X
FAN5702UC15X
FAN5702UC08X
FAN5702UMP30X
FAN5702UMP20X
FAN5702UMP15X
FAN5702UMP08X
30mA
20mA
15mA
8mA
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
WLCSP-16, 0.4mm Pitch
WLCSP-16, 0.4mm Pitch
WLCSP-16, 0.4mm Pitch
WLCSP-16, 0.4mm Pitch
UMLP-16, 3.0 x 3.0 x 0.55mm
UMLP-16, 3.0 x 3.0 x 0.55mm
UMLP-16, 3.0 x 3.0 x 0.55mm
UMLP-16, 3.0 x 3.0 x 0.55mm
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
30mA
20mA
15mA
8mA
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com