CAT4106_14 Datasheet, PDF (1/15 Pages) ON Semiconductor – 6 W Quad Channel DC/DC LED Driver

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
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,
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
TSSOP with exposed pad packages.
Features
• 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
Applications
• LCD Backlight Lighting
• Automotive and General Purpose Lighting
© Semiconductor Components Industries, LLC, 2014
1
June, 2014 − Rev. 4
http://onsemi.com
1
TQFN−16
HV4 SUFFIX
CASE 510AE
1
TSSOP−16
YP SUFFIX
CASE 948AP
LED1
GND
FAULT
PGND
FB
SW
EN/PWM
NC
PIN CONNECTIONS
1
TAB
is
GND
LED2
LED3
LED4
RSET
VFMAX
VFMIN
CTRL
VIN
1
LED1
GND
FAULT
PGND
TAB
is
GND
VFMAX
VFMIN
CTRL
VIN
(Top Views)
MARKING DIAGRAMS
4106Y
CDAL
CDAL = CAT4106HV4−GT2
4106Y = CAT4106YP−T2
ORDERING INFORMATION
Device
CAT4106HV4−GT2
(Note 1)
Package
TQFN−16
(Pb−Free)
Shipping
2,000/
Tape & Reel
CAT4106YP−T2
(Note 1)
TSSOP−16
2,000/
(Pb−Free) Tape & Reel
1. NiPdAu Plated Finish (RoHS−compliant)
2. Matte−Tin Plated Finish (RoHS−compliant)
Publication Order Number:
CAT4106/D