4-Channel Quad-Mode™ LED Driver
with Open/Short LED Detection
Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
Drives up to 4 LEDs at 30mA each
Pin compatible with industry standard ‘604
Open/short LED automatic detection
Power efficiency up to 92%
High resolution PWM dimming
Low noise supply ripple in all modes
Soft start and current limiting
Short circuit and thermal overload protection
16-Pad TQFN package, 4mm x 4mm
LCD Display Backlight
Digital Still Cameras
Package Qty per Reel Marking
4 x 4mm
4 x 4mm
(1) NiPdAu Plated Finish, RoHS compliant
For other finishes, please contact factory
For Ordering Information details, see page 14.
The CAT3604V is a high efficiency Quad-ModeTM
fractional charge pump that can drive up to four LEDs
with input supply voltages as low as 2.5V.
An external RSET resistor is used to control the LED
channel brightness while channel diagnostics include
automatic detection for both short and open LED
channel conditions, ensuring the CAT3604V maintains
the highest efficiency level in all operating modes.
Each operating mode uses a constant high frequency
switching scheme which allows the use of small form
factor external ceramic capacitors while delivering
excellent low noise input supply ripple up to 5.5 volts.
The EN input control supports direct PWM dimming
and can accommodate dimming frequencies in excess
of 10kHz thereby providing extremely high resolution
The device is available in the 16-pad low profile
0.8mm thin QFN (4mm x 4mm).
LED1 LED2 LED3 LED4
16 15 14 13
RSET VOUT VIN
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
TYPICAL APPLICATION CIRCUIT
C1- C2+ C2-
1 Doc. No. MD-5029, Rev. B