CAT4106HV4-GT2 Datasheet, PDF (1/17 Pages) ON Semiconductor – 6W Quad Channel DC/DC LED Driver with Diagnostics

CAT4106
6W Quad Channel DC/DC LED Driver with Diagnostics
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
„ RoHS-compliant 16-lead TQFN 4 x 4 mm and
TSSOP packages
APPLICATIONS
„ LCD Backlight Lighting
„ Automotive and General Purpose Lighting
ORDERING INFORMATION
Part Number
Quantity Package
Package per Reel Marking
CAT4106HV4-GT2 TQFN-16 ⁽¹⁾ 2,000 CDAL
CAT4106YP-T2 TSSOP-16 ⁽²⁾ 2,000 4106Y
Notes: (1) NiPdAu Plated Finish (RoHS-compliant)
(2) Matte-Tin Plated Finish (RoHS-compliant).
PIN CONFIGURATION
TSSOP 16-Lead (Top View)
LED1
GND
FAULT
PGND
FB
SW
EN/PWM
NC
1
16
2
15
3
14
4
TAB
is
13
5
GND ¹²
6
11
7
10
8
9
LED2
LED3
LED4
RSET
VFMAX
VFMIN
CTRL
VIN
TQFN 16-Lead (Top View)
16 15 14 13
LED1 1
12 VFMAX
GND 2
FAULT 3
TAB
is
GND
11 VFMIN
10 CTRL
PGND 4
9 VIN
5678
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.
For Ordering Information details, see page 16.
TYPICAL APPLICATION CIRCUIT
V_L
3 V to 24 V ^C2
L
47 µH
D
C3
4.7µF
10 µF/50 V
V_IN
3 V to 5.5 V ^C1
VIN
SW _VFMAX
VFMIN
1 µF
CAT4106
OFF... ON... DIM
EN/PWM
RSET
R2 20 kΩ
CTRL
R3
R1
20 kΩ
FB _GND
LED1
LED2
LED3
LED4
FAULT
PGND
R4 R6
R5 R7
V_IN
R8
LED Fault Detection
(open drain pull-down)
© 2009 SCILLC. All rights reserved.
1
Characteristics subject to change without notice
Doc. No. MD-5037, Rev. A