The TPS60231 charge pump is optimized for white LED supplies in color display backlight applications. The device provides a constant current for each LED, which the initial value can be set by an external resistor. The supply voltage ranges from 2.7 V to 6.5 V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or alkaline battery cells. Over an input voltage range from 3.1 V to 6.5 V, the device provides a high output current of up to 25 mA per LED with a total of 75 mA. High efficiency is achieved by utilizing a 1x/1.5x fractional conversion technique in combination with very low dropout current sources. In addition, the current controlled charge pump ensures low input current ripple and EMI. Only two external 1 µF and two 0.47 µF capacitors are required to build a complete small and low cost power supply solution. To reduce board space to a minimum, the device switches at 1 MHz operating frequency and is available in a small 16-pin QFN (RGT) package.

• Regulated Output Current With 0.4% Matching
• Drives up to 3 LEDs at 25 mA Each
• LED Brightness Control Through PWM Control Signal
• High Efficiency by Fractional Conversion With 1x and 1.5x Modes
• 1 MHz Switching Frequency
• 2.7 V to 6.5 V Operating Input Voltage Range
• Internal Softstart Limits Inrush Current
• Low Input Ripple and Low EMI
• Overcurrent and Overtemperature Protected
• Undervoltage Lockout With Hysteresis
• Ultra-Small 3mm x 3mm QFN Package
• APPLICATIONS
  • White LED Backlight for Color Displays in Cellular Phones, Smart Phones, PDAs, Handheld PCs, Digital Cameras, and Camcorders
  • Keypad Backlight

• Number of channels (#)
• 3
• Vin (Min) (V)
• 2.7
• Vin (Max) (V)
• 6.5
• Vout (Min) (V)
• 2.7
• Vout (Max) (V)
• 6.5
• Type
• Capacitive
• Switching frequency (Max) (kHz)
• 1250
• LED current per channel (mA)
• 25
• Peak efficiency (%)
• 90
• Topology
• Boost
• Features
• Analog Dimming, Analog/PWM Mixed Dimming, Direct PWM Dimming, Enable/Shutdown, Fault Detection, Integrated Switch, Load Disconnect During Shutdown, Soft Start, Synchronous Rectification, Thermal Shutdown
• Operating temperature range (C)
• -40 to 85

TPS60231的完整型号有：TPS60231RGTR、TPS60231RGTT，以下是这些产品的关键参数及官网采购报价：

TPS60231RGTR，工作温度：-40 to 85，封装：VQFN (RGT)-16，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS60231RGTR的批量USD价格：.347（1000+）

TPS60231RGTT，工作温度：-40 to 85，封装：VQFN (RGT)-16，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS60231RGTT的批量USD价格：.416（1000+）

TPS60231EVM-047 TPS60231 评估模块

The Texas Instruments TPS60231EVM-047 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS60231. The TPS60231 is an efficient charge-pump-based current sink that can drive up to three white LEDs with 25mA each.

The EVM is specifically designed and optimized to (...)

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