Today, the editor of Hao Qi Core Technology will introduce to you an innovative display backlight LED controller chip from STMicroelectronics, the world‘s leading semiconductor supplier that spans multiple electronic applications. It can simplify the circuit design of mobile phones and other portable electronic products, provide a stable and high-quality lighting source for the display screen, free up more circuit board space, and help prolong battery life.​​

Energy efficient, extrusion die compact size and high durability make white LED backlights the first choice for many mobile phone designs. LED needs constant drive current, and the drive circuit that provides constant current is composed of a controller chip and several components. ST‘s controller STLED25 monolithically integrates a control circuit capable of driving up to 10 LEDs, so STLED25 not only simplifies mobile phone design, but also frees up more board space for other functions.

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STLED25 inherits the advanced design and manufacturing capabilities of STMicroelectronics, providing five current sources that can be directly connected to the upper side of the LED, and the lower side can be directly connected to ground, eliminating the need to connect each LED channel back to the controller chip. Enables more compact, robust and reliable designs. The STLED25 only needs an external resistor to set the LED drive current.

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The operating voltage of STLED25 is 2.3V to 5.5V, which is suitable for electronic products powered by batteries. Through two independent control pins, the controller chip can drive 5 branch channels. Whether in maximum brightness or dimming mode, the controller ensures that the voltage conversion and current control circuits are highly energy efficient, maximizing battery life. In addition, the current matching of each channel is very precise, which ensures consistent backlight brightness, further improving the consumer experience.

Main features of LED controller chip STLED25:

1. 1.4 x 1.8mm chip level package;

2. The total board area of ​​the solution: 15.6mm2;

3. Output current: 5 x 25mA;

4. Energy efficiency: 85-87%;

5. PWM mode dimming;

6. Channels can be opened/closed separately;

7. Current limiting and protection circuit.

The above is the introduction of STLED25, the LED controller chip of STMicroelectronics. Hao Qi Core Technology provides a large number of chips STLED25, original and genuine stock, please contact Hao Qi Core Technology.