• - 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 TPS61150/1 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 a 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 pins, resulting in PWM dimming of the WLEDs. The boost regulator runs at a 1.2-MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with PFM control.

The two current outputs are ideal for driving WLED backlights for the sub- and main displays in clamshell phones.

特性

• 2.5-V to 6-V Input Voltage Range
• Two Outputs Each up to 27 V
• 0.7-A Integrated Switch
• Built-In Power Diode
• 1.2-MHz Fixed PWM Frequency
• Individually Programmable Output Current
• Input-to-Output Isolation
• Built-In Soft Start
• Overvoltage Protection
• Up to 83% Efficiency
• Up to 30-kHz PWM Dimming Frequency
• Available in a 10-Pin, 3- × 3-mm QFN Package
• APPLICATIONS
  • Sub and Main Display Backlight in Clam Shell Phones
  • Display and Keypad Backlight
  • Up to 14 WLED Driver