TPS61183数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The TPS61183 device provides a highly integrated white-LED (WLED) driver solution for notebook LCD backlights. This device has a built-in high-efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high-precision current regulation and matching. The device can support a total of 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. For all available packages, see the orderable addendum at the end of the data sheet.

特性 Features

• 4.5-V to 24-V Input Voltage
• 38-V Maximum Output Voltage
• Integrated 2-A, 40-V MOSFET
• 280-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, Maximum
• 1.5% (Typical) Current Matching
• PWM Brightness Interface Control
• PWM Programmable Mode Brightness Dimming Method or Direct PWM Dimming Method
• 4000-V HBM ESD Protection
• Programmable Overvoltage Threshold
• Built-in WLED Open and Short Protections
• Thermal Shutdown