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.