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.

• 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