TPS61162D Datasheet, PDF (1/26 Pages) Texas Instruments – Dual-Channel WLED Drivers For Smart Phone

TPS61162D
www.ti.com
SLVSC13 – JULY 2013
Dual-Channel WLED Drivers For Smart Phone
Check for Samples: TPS61162D
FEATURES
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•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
• 26.5V OVP Threshold
• 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 10-bit Dimming Resolution
• Up to 90% Efficiency
• Built-in Soft Start
• 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 TPS61162D is a dual-channel WLED driver
which provides highly integrated solutions for single-
cell Li-ion battery powered smartphone backlight. The
device has 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 device can drive up to 7s2p 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 TPS61162D supports both of the PWM dimming
interface and 1-wire digital EasyScale™ dimming
interface and can realize 9-bit brightness code
programming.
The TPS61162D integrates built-in soft start, over
voltage/current protection, and thermal shut down
protections.
The device is 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
TPS61162D
PWM
COMP
IFB1
IFB2
GND
ISET
R1
63.4k
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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.
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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