SSL5015TE/1Y Integrated Circuits (ICs)

PMIC - LED Drivers: SSL5015TE/1Y Application Field and Working Principle

The SSL5015TE/1Y is a PMIC (Power Management Integrated Circuit) from the SSL5015 series of plug-in, dual-channel constant current LED drivers. The device combines a MOSFET driver and constant current generator, providing a reliable solution for driving dual LEDs. It is mainly used in LCD-TVs, monitors, and televisions.

Features of SSL5015TE/1Y

• External Adjustable Output Current Range: The output current of SSL5015TE/1Y can be externally adjusted by setting the external resistor value. The maximum output current is 600mA.
• Constant Current Generator: The device incorporates a constant current generator for both outputs. This feature ensures that the output current is always stable and does not change with the supply voltage or ambient temperature.
• High Brightness PWM Dimming: This device enables users to achieve output brightness variation through pulse width modulation (PWM) at a frequency range from 1Hz to 30KHz.
• Thermal Shutdown Protection: The SSL5015TE/1Y is designed with a built-in thermal shutdown protection circuit to prevent the IC from overheating. When the die temperature exceeds a pre-set level, the output will be disabled.
• Short-Circuit Protection: The SSL5015TE/1Y is also designed to provide a short-circuit protection feature. The output of SSL5015TE/1Y will shut off when the LED current is higher than the maximum current.
• Parallel Outputs: The device has two outputs connected in parallel. This configuration allows two LEDs to be driven simultaneously, saving power and costs.

Applications of SSL5015TE/1Y

The SSL5015TE/1Y has several applications, such as:

• Backlighting for LCD-TVs, Monitors, Televisions: The device is used to provide variable brightness output for backlighting in LCD-TVs, monitors, and televisions.
• Storage Displays: The SSL5015TE/1Y is used to power the displays used in storage systems, such as surveillance systems.
• Signage and Advertising:The device is used to provide variable brightness output for advertisement display panels and signage displays.

Working Principle of SSL5015TE/1Y

The SSL5015TE/1Y consists of a MOSFET driver, a constant current generator, and several protection circuits. When the device is connected to a voltage source, the MOSFET driver switches the output voltage to a required level, and the constant current generator provides a constant current to the connected loads. Additionally, the thermal shutdown, short-circuit, and over-voltage protection circuits protect the device from damage.

Conclusion

The SSL5015TE/1Y is an integrated device for driving dual LED channels. It can be used for backlighting in LCD-TVs, monitors, and televisions, storage systems, and signage and advertisement displays. The device features an external adjustable current range, constant current generator, short-circuit protection, thermal shutdown protection, and parallel outputs.