• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The TPS61150A is a high frequency boost converter with two regulated current outputs for driving WLEDs. Each current output can be individually programmed through external resistors. There is dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. The output current can be reduced by a pulse width modulation (PWM) signal on the select pins or an analog voltage on the ISET pin. The boost regulator runs at 1.2MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with PFM control.

The two current outputs are ideal for driving WLED backlight for the sub and main displays in clam shell phones. The two outputs can also be used for driving display and keypad backlights.

特性

• 2.5V to 6V Input Voltage Range
• 0.7A Integrated Switch
• Built-in Power Diode
• 1.2MHz Fixed PWM Frequency
• Individually Programmable Output Current
• Input-to-Output Isolation
• Built-in Soft Start
• 27V Overvoltage Protection
• 3% at 15mA Matching between Two Current Strings, Improvement from TPS61150/1
• Up to 83% Efficiency
• Up to 30kHz PWM Dimming Frequency
• Availiable in a 10 Pin, 3 × 3 mm QFN Package
• APPLICATIONS
  • Up to 14 WLED Driver for Media Form Factor Display
  • Sub and Main Display Backlight in Clam Shell Phones
  • Display and Keypad Backlight in Portable Equipment