Texas Instruments LM3699
The LM3699 is a three-string, high-efficiency, PWMcontrolled power source for display backlight or keypad LEDs in smartphone handsets. The highvoltage inductive boost converter with integrated 1-A, 40-V MOSFET provides the power for three series LED strings. The boost output automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.| Part No. | LM3699 |
|---|---|
| Datasheet | LM3699 Download |
| Manufacturer |  Texas Instruments |
| Description | High-Efficiency White LED Driver |
| Buy | Stock & Price |
FEATURES
●1 Drives Parallel High-Voltage LED Strings for Display or Keypad Lighting● Boost Converter up to 90% Efficiency
● Four User-Selectable Full-Scale Current Settings (20.2 mA, 18.6 mA, 17.0 mA, 15.4 mA)
● Quick-Dimming Enable Terminal (ILOW)
● Simple PWM Duty Cycle Control
● 24-V Overvoltage Protection Threshold
● Fixed 1-MHz Switching Frequency
● Integrated 1-A/40-V MOSFET
● Three Current Sink Terminals
● Adaptive Boost Output to LED Voltages
● Thermal Shutdown Protection
● 29-mm2 Total Solution Size 3
DESCRIPTION
The ILOW terminal provides a method to quickly reduce LED brightness during camera flash operation. The LM3699 has integrated overvoltage, overcurrent, and thermal protection. The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range. 2APPLICATIONS
● Power Source for Smart Phone Illumination● Display or Keypad Illumination Device Information ORDER NUMBER PACKAGE BODY SIZE LM3699YFQ DSBGA (12) 1,64 mm x 1,29 mm Simplified Sc...
