CAT4134 Datasheet, PDF (1/12 Pages) Catalyst Semiconductor – 500mA Dual Channel Movie/Flash LED Driver

CAT4134
500 mA Dual Channel
Movie/Flash LED Driver
Description
The CAT4134 is a high power, dual channel boost converter which
provides two matched LED currents. Output current levels are
controlled by one of two resistors RSET or RFLASH. When the
FLASH input pin is low (movie mode), RSET sets the current. When
FLASH is high (flash mode), the resistor RFLASH sets the LED
current. Each channel drives two or three white LEDs in series and
provides a regulated current to control their brightness. Input supply
down to 3 V is supported, making the device ideal for Li−Ion battery
applications.
High frequency low noise operation allows the device to be used
with small external inductors and ceramic capacitors while still
maintaining excellent efficiency. When not in use the device can be
placed into a “zero” quiescent mode via the shutdown pin.
In addition to soft-start control and current limiting, the CAT4134
include thermal shutdown protection. A dedicated overvoltage pin
(OVP) allows the user to limit the maximum LED supply voltage. The
device is packaged in the 12−pad TDFN 3 mm x 3 mm.
Features
• Dual Mode (Movie or Flash) Operation
• Independent Movie/Flash LED Current Control
• Can Drive 2, 3, 4 or 6 LEDs
• High LED Current (250 mA Max per Channel)
• Power Efficiency up to 85%
• Dual Frequency Mode 1.2 MHz and 900 kHz
• Soft−start Inrush Current
• Adjustable Overvoltage Protection
• Thermal Shutdown Protection
• Operating Temperature Range −40°C to +85°C
• 12−pad TDFN 3 mm x 3 mm Package
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Camera Flash
• Flash Light
• High−power White LEDs
• Digital Still Cameras
• Color LCD Backlighting
http://onsemi.com
TDFN−12
HV2 SUFFIX
CASE 511AN
PIN CONNECTIONS
FLASH
EN
PGND
AGND
LED2
LED1
1
TAB
is
GND
OVP
SW
SW
VIN
RSET
RFLASH
(Top View)
MARKING DIAGRAM
HAAS
HAAU
HAAS = CAT4134HV2−T2
HAAU = CAT4134HV2−GT2
ORDERING INFORMATION
Device
CAT4134HV2−T2
(Note 1)
Package
TDFN−12
(Pb−Free)
Shipping
2,000/
Tape & Reel
CAT4134HV2−GT2 TDFN−12
2,000/
(Note 2)
(Pb−Free) Tape & Reel
1. Matte−Tin Plated Finish (RoHS−compliant).
2. NiPdAu Plated Finish (RoHS−compliant)
© Semiconductor Components Industries, LLC, 2010
1
February, 2010 − Rev. 2
Publication Order Number:
CAT4134/D