Datasheet Texas Instruments TPS61195RUYT — 数据表

TPS61195
www.ti.com SLVSA07A – MAY 2010 – REVISED AUGUST 2010 TPS61195 WLED Driver for LCD Backlighting With PWM and SMBus Control Interface
Check for Samples: TPS61195 FEATURES 1 4.5V to 21V Input Voltage
Integrated 2.5A 50V MOSFET
600kHz to 1MHz Programmable Switching
Frequency
Adaptive Boost Output for Best Efficiency
Designed to Use Small L-C Components
Internal Loop Compensation
Eight Current Sinks of 30mA
Support up to Total 96 LEDs
1% Current Matching PWM and SMBus Brightness Interface
8-bits (256 steps) Brightness Level
Programmable Over Voltage Threshold
Built-in WLED Open/Short Protection
Over Thermal Protection
28L 4Г—4 WQFN APPLICATIONS Notebook/Netbook LCD Display Backlighting DESCRIPTION
The TPS61195 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in
high efficiency boost regulator with integrated 2.5A/50V power MOSFET. The eight current sink regulators
provide high precision current regulation and matching. In total, the device can support up to 96 LEDs. Unused
sinks are disabled by tying them to ground. The boost output automatically adjusts its voltage to the WLED
forward voltage to improve efficiency.
The TPS61195 supports multiple brightness dimming methods. During PWM dimming, each IFB pin’s current is …