SP7686AER-L/TR

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PMIC - LED Drivers

The SP7686AER-L/TR is a monolithic current-regulation PWM-dimmable step-down white-LED driver with reverse current protection for automotive and general purpose applications. This device includes a voltage regulator that provides a constant output voltage and a PWM dimming circuit that enables the adjustment of its output current for regulating the total LED current. Its pulse-width modulation feature allows a wide range of intensity from 0% to 100%. In addition, it can also be used to achieve Power Factor Correction (PFC) and phase-controlled dimming.

Application

The SP7686AER-L/TR provides an efficient, flexible and cost-effective solution for automotive and general purpose LED applications. Examples of applications include LED headlights, LED tail lights, LED driving lights and LED high-level brake lights. It also provides a solution for single-stage dimming, such as automotive comfort lighting, decorative lighting and aisle lighting.

Working Principle

The SP7686AER-L/TR is designed to provide a constant current for LED illumination. The LED current is controlled by a PWM signal generated by the internal PWM-dimming circuit. The device uses a voltage regulator to generate a constant voltage output. The PWM-dimming circuit takes an input PWM-signal and modulates the LED current by adjusting the on-time period of the device. The on-time period can be adjusted from 0% to 100%. The output voltage of the device is also adjustable from 0% to 100%. When the PWM-signal is low, the LED current is off and when the PWM-signal is high, the LED current is on. This PWM-dimmable step-down white-LED driver provides a solution for power factor correction and phase-controlled dimming.

Features

The SP7686AER-L/TR provides several key features:

• Integrated voltage regulator for constant output voltage
• Integrated PWM-dimming circuit for regulation of LED current
• High efficiency step-down buck converter
• Low ripple LED current
• Integrated reverse current protection
• Power factor correction (PFC)
• Phase-controlled dimming

Conclusion

The SP7686AER-L/TR is a highly integrated, cost-effective, monolithic current-regulation PWM-dimmable step-down white-LED driver with reverse current protection. It is suitable for automotive and general purpose LED applications including LED headlights, LED tail lights, LED driving lights and LED high-level brake lights. It features a voltage regulator for constant voltage output, PWM dimming for a wide range of intensity from 0% to 100%, and can also be used for power factor correction and phase-controlled dimming.

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