TPS61183 - 具有 PWM 接口和可编程 PWM 明暗调节的、用于笔记本电脑的 WLED 驱动器

TPS61183是TI德州仪器公司的一款背光产品，TPS61183是具有 PWM 接口和可编程 PWM 明暗调节的、用于笔记本电脑的 WLED 驱动器，本站介绍了TPS61183的封装应用图解、特点和优点、功能等，并给出了与TPS61183相关的TI元器件型号供参考。

TPS61183 - 具有 PWM 接口和可编程 PWM 明暗调节的、用于笔记本电脑的 WLED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品描述

The TPS61183 IC provides a highly integrated WLED driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2.0A /40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61183 supports the programmable brightness dimming method. In this configuration, the dimming duty cycle of the WLED current is controlled by the input PWM signal but the dimming frequency is fixed and set by an external resistor. During direct PWM dimming, the WLED current completely synchronized with the input PWM signal's duty cycle and frequency.

产品特性

4.5 V to 24 V Input Voltage
38 V Maximum Output Voltage
Integrated 2.0 A 40 V MOSFET
300 kHz to 1 MHz Programmable Switching Frequency
Adaptive Boost Output to WLED Voltages
Wide PWM Dimming Frequency Range
- 100 Hz to 50 KHz for Direct PWM Mode
- 100 Hz to 22 KHz for Frequency Programmable Mode
100:1 Dimming Ratio at 20 kHz
10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
Small External Components
Integrated Loop Compensation
Six Current Sinks of 30 mA Max
1.5% (Typ) Current Matching
PWM Brightness Interface Control
PWM Programmable Mode Brightness Dimming Method or Direct PWM Dimming Method
4 kV HBM ESD Protection
Programmable Over Voltage Threshold
Built-in WLED Open/Short Protection
Thermal Shutdown
20 Lead 4mm ×4mm × 0.8mm TQFN Package
APPLICATIONS
- Notebook LCD Display Backlight

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