TPS61176 - 支持单节锂离子电池输入的高效 6 通道 WLED 驱动器

TPS61176是TI德州仪器公司的一款背光产品，TPS61176是支持单节锂离子电池输入的高效 6 通道 WLED 驱动器，本站介绍了TPS61176的封装应用图解、特点和优点、功能等，并给出了与TPS61176相关的TI元器件型号供参考。

TPS61176 - 支持单节锂离子电池输入的高效 6 通道 WLED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品特性

2.7-V to 6.5-V VIN Voltage Range
2.7-V to 24-V Boost Input Voltage Range
Integrated 2-A/40-V MOSFET
1-MHz Switching Frequency
Adaptive Boost Output to WLED Voltages
Six Current Sinks of 35 mA Capability Each
±2% (Maximum) Current Accuracy
1.3% (Typical) Current Matching
100-Hz to 22-kHz Input PWM Frequency
Mixed Dimming Mode: Automatic Switch Between Analog Dimming and PWM Dimming
- Programmable Switch Point: 25% or 12.5%
- Programmable PWM Dimming Mode: 22-kHz PWM Dimming, Direct PWM Dimming
Up to 14-bit Dimming Resolution
Support Down to 1% Dimming Duty Cycle
Input PWM Glitch Filter
Up to 90% Efficiency
Driver for Input and Output Isolation PFET for True Shutdown
Built-in WLED Open and Short Protection
Thermal Shutdown

产品应用

Backlight for Small and Media Form Factor LCD Display with Single-Cell or Multi-Cell Battery Input

产品说明

The TPS61176 is an integrated WLED backlight driver for tablets or notebook PCs using single-cell batteries. It comprises a high-efficiency boost converter with an integrated 2-A, 40-V power MOSFET, and six current sink regulators. The device can drive up to 60 WLEDs. The boost output voltage automatically adjusts to the WLED forward voltage to improve efficiency.

The TPS61176 supports mixed dimming mode. The automatic switch between PWM dimming and analog dimming increases the overall electrical-to-optical efficiency, reducing power of the backlight significantly. The switch point can be programmed to 12.5% or 25%. PWM dimming mode can also be programmed to fixed frequency dimming or direct PWM dimming. The device supports up to 14-bit dimming resolution to avoid potential flickering during low brightness dimming.

True shutdown is supported with a driver for an external isolation P-channel MOSFET. When the device is disabled or the boost output is shorted to ground, the isolation PFET is turned off to cut off the power path from battery preventing any leakage current from the battery. The device also integrates soft start, thermal shutdown, WLED open and short protection. Its 16-pin WQFN package provides a space-saving and high-performance WLED driver solution.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS61176	WQFN (16)	3.00 mm × 3.00 mm

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