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CAT4106
6 W Quad Channel DC/DC
LED Driver with Diagnostics
Description
The CAT4106 is an integrated multi ? channel LED driver and high
power DC/DC converter suitable for powering backlighting
applications up to a total of 6 watts. Up to four matched LED strings
can be accurately programmed with uniform drive current set by a
single external resistor. Each output channel is suitable for LED string
voltages of up to 36 V. The driver automatically adjusts the output
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voltage to drive the highest forward voltage string with the minimum
headroom voltage maximizing the efficiency.
High resolution dimming control is achieved by the EN/PWM logic
pin which supports multiple frequencies. This ensures precise PWM
dimming control while the device remains fully biased. In addition,
1
TQFN ? 16
HV4 SUFFIX
CASE 510AE
1
TSSOP ? 16
YP SUFFIX
CASE 948AP
when held at logic low, the device to enter a full shutdown “zero”
current mode.
External programming resistors set the minimum and maximum
voltage limits for the acceptable “window of operation” for LED
strings. Any channel which fails to regulate within the window (Open
or Short LED) is detected and flagged on the FAULT logic output
(active low, open ? drain).
The device is available in a 16 ? lead TQFN 4 mm x 4 mm and
LED1
GND
FAULT
PGND
FB
SW
EN/PWM
NC
PIN CONNECTIONS
1
TAB
is
GND
LED2
LED3
LED4
RSET
VFMAX
VFMIN
CTRL
VIN
TSSOP with exposed pad packages.
Features
TAB
is
GND
?
?
?
?
?
?
?
?
?
?
?
?
Four LED Channels with Tight Current Matching
Integrated DC/DC Boost Converter
Up to 6 W LED Total Output Power
Up to 92% Efficiency
Low Dropout LED Channels (500 mV at 175 mA)
High Frequency PWM Interface (up to 2 kHz)
Adjustable Short/Open LED Detection
Programmable LED Channel Current
Adjustable LED Channel Voltage
Thermal Shutdown Protection
16 ? lead TQFN 4 x 4 mm and TSSOP Packages
These Devices are Pb ? Free, Halogen Free/BFR Free and are RoHS
Compliant
1
LED1 VFMAX
GND VFMIN
FAULT CTRL
PGND VIN
(Top Views)
MARKING DIAGRAMS
4106Y CDAL
Applications
? LCD Backlight Lighting
? Automotive and General Purpose Lighting
CDAL = CAT4106HV4 ? GT2
4106Y = CAT4106YP ? T2
ORDERING INFORMATION
Device Package Shipping
CAT4106HV4 ? GT2
(Note 1)
CAT4106YP ? T2
(Note 1)
TQFN ? 16
(Pb ? Free)
TSSOP ? 16
(Pb ? Free)
2,000/
Tape & Reel
2,000/
Tape & Reel
1. NiPdAu Plated Finish (RoHS ? compliant)
2. Matte ? Tin Plated Finish (RoHS ? compliant)
? Semiconductor Components Industries, LLC, 2013
March, 2013 ? Rev. 3
1
Publication Order Number:
CAT4106/D
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