TPS61162A Datasheet, PDF (1/28 Pages) Texas Instruments – Dual-Channel WLED Drivers for Smart Phone

TPS61162A
TPS61163A
www.ti.com
SLVSC26 – NOVEMBER 2013
Dual-Channel WLED Drivers for Smart Phone
Check for Samples: TPS61162A, TPS61163A
FEATURES
1
•2 2.7V to 6.5V Input Voltage
• Integrated 1.5A/40V MOSFET
• 1.2MHz Switching Frequency
• Dual Current Sinks of up to 30mA Current
Each
• 1% Typical Current Matching and Accuracy
• Optional 26.5V / 37.5V OVP Threshold
– TPS61162A – 26.5V OVP
– TPS61163A – 37.5V OVP
• Adaptive Boost Output to WLED Voltages
• Very Low Voltage Headroom Control (90mV)
• Flexible Digital and PWM Brightness Control
• 1-Wire Control Interface (EasyScale)
• PWM Dimming Control Interface
• Up to 100:1 PWM Dimming Ratio
• Up to 9-bit Dimming Resolution
• Up to 90% Efficiency
• Built-in Soft Start
• PFM Mode at Light Load
• Over Voltage Protection
• Built-in WLED Open/Short Protection
• Thermal Shutdown
• Support 4.7uH Inductor Application
• 9L 1.31 mm x 1.31 mm CSP Package
APPLICATIONS
• Smart Phones
• PDAs, Handheld Computers
• GPS Receivers
• Backlight for Small and Media Form Factor
LCD Display with Single-Cell Battery Input
DESCRIPTION
The TPS61162A and TPS61163A are dual-channel
WLED drivers which provide highly integrated
solutions for single-cell Li-ion battery powered smart
phone backlight. The devices have a built-in high
efficiency boost regulator with integrated 1.5A/40V
power MOSFET and support as low as 2.7V input
voltage. With two high current-matching capability
current sink regulators, the devices can drive up to
10s2p WLED diodes. The boost output can
automatically adjust to the WLED forward voltage and
allow very low voltage headroom control, thus to
improve LED strings efficiency effectively.
The TPS61162A and TPS61163A support both of the
PWM dimming interface and 1-wire digital
EasyScale™ dimming interface and can realize 9-bit
brightness code programming.
The TPS61162A and TPS61163A integrate built-in
soft start, over voltage/current protection, and thermal
shut down protections.
The devices are available in a space-saving 1.31 mm
x 1.31 mm CSP package.
TYPICAL APPLICATION
2.7V ~ 6.5V
VBAT
C1
R2
1µ F
10
C3
1µ F
L1
4.7µ H
SW
VIN
D1
C2
1µ F
Enable /
Disable
PWM
Dimming
C4
330nF
EN
TPS61162A/3A
PWM
COMP
IFB1
IFB2
GND
ISET
R1
63.4k
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EasyScale is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated