|Package | PIN:||YFQ | 12|
|Temp:||Q (-40 to 125)|
- Drives Three Parallel High-Voltage LED Strings for Display and Keypad Lighting
- High-Voltage Strings Capable of up to 40-V Output Voltage and up to 90% Efficiency
- Up to 30 mA per Current Sink
- 11-Bit Configurable Dimming Resolution
- PWM Input for Content Adjustable Brightness Control (CABC)
- Fully Configurable LED Grouping and Control
- Integrated 1-A/40-V MOSFET
- Adaptive Boost Output to LED Voltages
- Selectable 500-kHz and 1-MHz Switching Frequency
- Four Configurable Overvoltage Protection Thresholds (16 V, 24 V, 32 V, and 40 V)
- Overcurrent Protection
- Thermal Shutdown Protection
- 29-mm2 Total Solution Size
Texas Instruments LM3697YFQR
The LM3697 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 series 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 LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2 and HVLED3).
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 LM3697 is fully configurable 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.