TPS61163A Texas instruments

TPS61163A

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TPS61163A

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Описание

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.

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

Number of channels	2
Vin (min) (V)	2.7
Vin (max) (V)	6.5
Vout (min) (V)	2.7
Vout (max) (V)	37.5
Type	Inductive
Switching frequency (max) (kHz)	1200
Duty cycle (max) (%)	99.5
LED current per channel (mA)	30
Peak efficiency (%)	90
Topology	Boost
Features	EasyScale 1-Wire Interface, Enable/Shutdown, OVP, PWM control, Soft Start, Thermal shutdown
Operating temperature range (°C)	-40 to 85
Rating	Catalog