1 Features

1• 8-V to 30-V 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 200 Hz

• MOSFET Overcurrent Protection

• Programmable LED Short Protection

• Adjustable LED Open Protection

• Thermal Shutdown Protection

• 20-Pin SO Package and TSSOP Package

With PowerPAD™

2 Applications

• Monitor LCD Backlight

• LCD TV Backlight

• General LED Lighting

3 Description

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 device

automatically adjusts the output voltage of the boost

converter to provide only the voltage required by the

LED string with the largest forward voltage drop plus

the minimum required voltage at the IFBx pin of that

string, thereby optimizing efficiency of the driver.

The TPS61199 provides PWM brightness dimming

with an external PWM signal. The signal of the PWM

maximum frequency can be as high as 22 kHz.

Dimming ratios up to 5000:1 can be achieved with a

200-Hz PWM signal. The TPS61199 integrates

overcurrent protection for the switch FET, soft startup,

LED short protection, LED open protection, and

overtemperature shutdown protection. The TPS61199

device is available in 20-pin SO and HTSSOP

packages.