CAT3604V Datasheet, PDF (1/15 Pages) Catalyst Semiconductor – 4-Channel Quad-Mode™ LED Driver with Open/Short LED Detection

4-Channel Quad-Mode™ LED Driver
with Open/Short LED Detection
CAT3604V
FEATURES
„ 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
APPLICATION
„ LCD Display Backlight
„ Cellular Phones
„ Digital Still Cameras
„ Handheld Devices
ORDERING INFORMATION
Part Number Package Qty per Reel Marking
CAT3604VHV4-GT2
TQFN-16⁽¹⁾
4 x 4mm
2000
CDAK
CAT3604VHV4-T2
TQFN-16
4 x 4mm
2000
CDAF
Note:
(1) NiPdAu Plated Finish, RoHS compliant
For other finishes, please contact factory
For Ordering Information details, see page 14.
DESCRIPTION
The CAT3604V is a high efficiency Quad-Mode^TM
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
brightness levels.
The device is available in the 16-pad low profile
0.8mm thin QFN (4mm x 4mm).
PIN CONFIGURATION
LED1 LED2 LED3 LED4
16 15 14 13
EN 1
12 GND
NC 2
NC 3
GND
11 C2+
10 C2-
NC 4
5
6
7
8
RSET VOUT VIN C1+
9 C1-
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
TYPICAL APPLICATION CIRCUIT
1µF
1µF
V_IN
2.4V ^CIN
to
5.5V ^1µF
ON OFF
4.02kΩ
C1+
VIN
C1- C2+ C2-
VOUT
EN
RSET
CAT3604V
GND
LED1
LED2
LED3
LED4
V_OUT
C_OUT
1µF
20mA
1
Doc. No. MD-5029, Rev. B