The TPS61183 IC provides a highly integrated WLED driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2.0A /40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61183 supports the programmable brightness dimming method. In this configuration, the dimming duty cycle of the WLED current is controlled by the input PWM signal but the dimming frequency is fixed and set by an external resistor. During direct PWM dimming, the WLED current completely synchronized with the input PWM signal's duty cycle and frequency.

• 4.5 V to 24 V Input Voltage
• 38 V Maximum Output Voltage
• Integrated 2.0 A 40 V MOSFET
• 300 kHz to 1 MHz Programmable Switching Frequency
• Adaptive Boost Output to WLED Voltages
• Wide PWM Dimming Frequency Range
  • 100 Hz to 50 KHz for Direct PWM Mode
  • 100 Hz to 22 KHz for Frequency Programmable Mode
• 100:1 Dimming Ratio at 20 kHz
• 10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
• Small External Components
• Integrated Loop Compensation
• Six Current Sinks of 30 mA Max
• 1.5% (Typ) Current Matching
• PWM Brightness Interface Control
• PWM Programmable Mode Brightness Dimming Method or Direct PWM Dimming Method
• 4 kV HBM ESD Protection
• Programmable Over Voltage Threshold
• Built-in WLED Open/Short Protection
• Thermal Shutdown
• 20 Lead 4mm ×4mm × 0.8mm TQFN Package
• APPLICATIONS
  • Notebook LCD Display Backlight