AP3031
White LED boost converter with constant current regulation for LCD backlight applications
Product Overview
Description
The AP3031 is a boost converter specifically designed for driving white LEDs in LCD backlight applications. It provides constant current regulation to ensure uniform LED brightness.
The device operates from 2.7V to 5.5V input and can drive up to 6 white LEDs in series. The constant current output eliminates the need for current-limiting resistors.
With PWM dimming capability and integrated over-voltage protection, the AP3031 provides a complete solution for LED backlight applications.
Product Series
AP
Primary Application
LCD backlighting
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Input Voltage | 2.7V-5.5V |
|---|---|
| LED Configuration | Up to 6 series LEDs |
| Output Current | Up to 20mA |
| Switching Frequency | 1MHz |
| Dimming | PWM (100Hz-10kHz) |
| Package | SOT-23-5 |
Applications
LCD backlighting
Electronic system design
Portable device displays
Electronic system design
Keypad backlighting
Electronic system design
Status indicator LEDs
Electronic system design
FAE Expert Insights
"The AP3031 is a simple and effective solution for LCD backlight applications. The constant current regulation ensures consistent brightness across LED strings. I've used this in numerous portable device designs. The PWM dimming works well for brightness control. For best results, ensure good thermal management for the LEDs and follow the recommended PCB layout for the boost converter section."
I highly recommend the AP3031 for its proven reliability and excellent performance in real-world applications.
— Senior FAE Team, BeiLuo
Frequently Asked Questions
How many LEDs can be driven?
The AP3031 can drive up to 6 white LEDs in series. The output voltage automatically adjusts to maintain constant current through the LED string. For detailed specifications and application support on chipown AP3031, refer to the datasheet or contact our team.
Connect 3-6 LEDs in series based on required brightness.
What is the output current?
The AP3031 provides up to 20mA constant current output, suitable for most LCD backlight applications. The current is set by an external resistor. For detailed specifications and application support on chipown AP3031, refer to the datasheet or contact our team.
Set current with external resistor based on LED requirements.
How is brightness controlled?
Brightness is controlled via PWM dimming. Apply a PWM signal (100Hz-10kHz) to the enable pin to adjust LED brightness from 0% to 100%. For detailed specifications and application support on chipown AP3031, refer to the datasheet or contact our team.
Use PWM for smooth brightness control.
What input voltage is required?
The AP3031 operates from 2.7V to 5.5V, suitable for single-cell Li-ion or 3-cell alkaline batteries. For detailed specifications and application support on chipown AP3031, refer to the datasheet or contact our team.
Verify input voltage is within 2.7V-5.5V range.
Is over-voltage protection included?
Yes, the AP3031 includes over-voltage protection to prevent damage if the LED string opens or disconnects. For detailed specifications and application support on chipown AP3031, refer to the datasheet or contact our team.
Built-in protection for reliable operation.