LM3633 Series
Complete lighting power Solution for smartphone handsets
Manufacturer: Texas Instruments
Catalog
Complete lighting power Solution for smartphone handsets
Key Features
• Drives Three Parallel High-Voltage LED Stringsfor Display and Keypad LightingHigh-Voltage Strings Capable of up to 40-VOutput Voltage and up to 90% EfficiencyUp to 30-mA per Current Sink(Both Backlight and Indicator)11-Bit High-Voltage LED DimmingPWM Input for Content Adjustable BrightnessControl (CABC)Integrated 1-A/40-V MOSFETAdaptive Boost Output to LED VoltagesSix Low-Voltage Current Sinks for Indicator LEDsIntegrated Charge Pump for Improved Efficiencyand VINOperating RangeInternal Pattern Generation Engine for EachIndicator LEDFully Configurable LED Grouping and ControlFour Programmable Overvoltage ProtectionThresholds (16 V, 24 V, 32 V, and 40 V)Programmable 500-kHz and 1-MHzSwitching FrequencyOvercurrent ProtectionThermal Shutdown Protection27 mm2Total Solution SizeDrives Three Parallel High-Voltage LED Stringsfor Display and Keypad LightingHigh-Voltage Strings Capable of up to 40-VOutput Voltage and up to 90% EfficiencyUp to 30-mA per Current Sink(Both Backlight and Indicator)11-Bit High-Voltage LED DimmingPWM Input for Content Adjustable BrightnessControl (CABC)Integrated 1-A/40-V MOSFETAdaptive Boost Output to LED VoltagesSix Low-Voltage Current Sinks for Indicator LEDsIntegrated Charge Pump for Improved Efficiencyand VINOperating RangeInternal Pattern Generation Engine for EachIndicator LEDFully Configurable LED Grouping and ControlFour Programmable Overvoltage ProtectionThresholds (16 V, 24 V, 32 V, and 40 V)Programmable 500-kHz and 1-MHzSwitching FrequencyOvercurrent ProtectionThermal Shutdown Protection27 mm2Total Solution Size
Description
AI
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.
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.
