TPS61162A_16 Datasheet, PDF (1/35 Pages) Texas Instruments – TPS6116xA Dual-Channel WLED Drivers For Smart Phones

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TPS61162A, TPS61163A
SLVSC26A – NOVEMBER 2013 – REVISED JUNE 2015
TPS6116xA Dual-Channel WLED Drivers For Smart Phones
1 Features
•1 2.7-V to 6.5-V Input Voltage
• Integrated 1.5-A/40-V MOSFET
• 1.2-MHz Switching Frequency
• Dual Current Sinks of up to 30-mA Current Each
• 1% Typical Current Matching and Accuracy
• Optional 26.5-V / 37.5-V OVP Threshold
– TPS61162A: 26.5-V OVP
– TPS61163A: 37.5-V OVP
• Adaptive Boost Output to WLED Voltages
• Very Low Voltage Headroom Control (90 mV)
• Flexible Digital and PWM Brightness Control
• One-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
• Overvoltage Protection
• Built-in WLED Open/Short Protection
• Thermal Shutdown
• Supports 4.7-µH Inductor Application
2 Applications
• Smart Phones
• PDAs, Handheld Computers
• GPS Receivers
• Backlight for Small and Media Form-Factor LCD
Display with Single-Cell Battery Input
3 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 1.5-A, 40-V
power MOSFET and support as low as 2.7-V 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 the
PWM dimming interface and one-wire digital
EasyScale™ dimming interface and can realize 9-bit
brightness code programming.
The TPS61162A and TPS61163A integrate built-in
soft start, as well as overvoltage, overcurrent, and
thermal shutdown protections.
PART NUMBER
TPS61162A
TPS61163A
Device Information⁽¹⁾
PACKAGE
OPEN LED PROTECTION
DSBGA (9)
TPS61162A use 26.5 V (typical)
TPS61162A use 37.5 V (typical)
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
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
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.