LM3633YFQR

适用于智能手机的完整照明电源解决方案 20-DSBGA -40 to 85

The LM3633 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 parallel high-voltage LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3633 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. The high-voltage inductive boost converter provides the power for three parallel LED strings HVLED1, HVLED2 and HVLED3. The integrated charge pump provides the bias for the six low-voltage indicator LEDs LVLED1-LVLED6. All low-voltage current sinks can have a programmable pattern modulated onto their output current for a wide variety of blinking patterns.

An additional feature is a Pulse Width Modulation PWM control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3633 is fully programmable via an I2C-compatible interface. The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.