SP6699
SP6699 is 30V Step Up White LED Driver manufactured by MaxLinear.
DESCRIPTION
The SP6699 is an inductor-based DC/DC converter designed to drive up to six white LEDs in series for LCD modules and keypad backlighting functions.
Only one feedback resistor is needed to control the LED current and obtain the desired brightness. A 1.2MHz constant frequency PWM control scheme is used, enabling the usage of small external ponents. A typical application needs a 1mm tall inductor and a 0.22μF output capacitor. Additionally, the boost circuit Schottky diode is integrated, further reducing the overall foot print.
A logic controlled enable pin allows this device to be placed in a low current consumption mode of a few microamps. Furthermore, the SP6699 is equipped with an over voltage output protection circuit which clamps the output voltage to 30 volts when any LED fails or in other abnormal conditions.
The SP6699 is offered in a small lead free, Ro HS pliant 6-pin SOT23 package.
30V Step Up White LED Driver
Rev. 3.0.1
APPLICATIONS
- LCD Modules
- Keypad Backlighting
- Digital Cameras
- GPS Receivers
- Portable Media Players
FEATURES
- High Output Voltage: Up to 30V
- Drives 2 to 6 LEDs @ 20m A
- High Efficiency up to 84%
- Integrated Schottky Diode
- Fast 1.2MHz Switching Frequency
- 200m V Feedback Voltage
- PWM Dimming Capability up to 2KHz
- Over Output Voltage Protection
- Internal Soft Start Circuit
- Small SOT23-6 Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP6699 Application Diagram 1/12
Rev. 3.0.1
30V Step Up White LED Driver
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
Input Voltage VIN 20V SW Voltage 38V FB Voltage...
