TPS61199 - 用于 LCD 显示器背光的白光 LED 驱动器

TPS61199是TI德州仪器公司的一款背光产品，TPS61199是用于 LCD 显示器背光的白光 LED 驱动器，本站介绍了TPS61199的封装应用图解、特点和优点、功能等，并给出了与TPS61199相关的TI元器件型号供参考。

TPS61199 - 用于 LCD 显示器背光的白光 LED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品描述

The TPS61199 provides highly integrated solutions for large size LCD backlighting. This device integrates a current-mode boost controller and eight current sinks for driving up to eight LED strings with multiple LEDs in series. Each string has an independent current regulator with current matching between strings reaching 3% regulation accuracy. The IC adjusts the boost controller’s output voltage automatically to provide only the voltage required by the LED string with the largest forward voltage drop plus the minimum required voltage at that string's IFBx pin, thereby optimizing the driver’s efficiency.

The TPS61199 provides PWM brightness dimming with an external PWM signal. The PWM signal’s maximum frequency can be as high as 22kHz. Dimming ratios up to 5000:1 can be achieved with 200Hz PWM signal. The TPS61199 integrates over current protection for the switch FET, soft startup, LED short protection, LED open protection, and over temperature shutdown protection. The TPS61199 device is available in 20-pin SOP and HTSSOP package.

产品特性

8V to 30V Input Voltage
Integrated High-Power Boost Controller
Adaptive Boost Output for LED Voltages
Drive up to Eight LED Strings in Parallel
Maximum 70 mA for Each LED String
3% Current Matching Between Strings
5000:1 PWM Dimming Ratio at 200Hz
MOSFET Over-current Protection
Programmable LED Short Protection
Adjustable LED Open Protection
Thermal Shutdown Protection
20-pin SOP Package and TSSOP Package with PowerPAD™
APPLICATIONS
- Monitor LCD Backlight
- LCD TV Backlight
- General LED Lighting

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