TPS61163A Dual-Channel WLED Drivers For Smart Phone | TI.com

TPS61163A
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Dual-Channel WLED Drivers For Smart Phone

 

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.

Features

  • 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

Parametrics

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Part number Order Channels (#) Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switching frequency (Max) (kHz) Type LED current per channel (mA) LED (#) Topology Shutdown current (Typ) (uA) Peak efficiency (%) LED configuration Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
TPS61163A Order now 2     2.7     6.5     2.7     37.5     1200     Inductive     30     20     Boost     1     90     Parallel     EasyScale 1-Wire Interface
Enable/Shutdown
OVP
PWM Control
Soft Start
Thermal Shutdown    
-40 to 85     DSBGA | 9     9DSBGA: 2 mm2: 1.4 x 1.4 (DSBGA | 9)