ADP1650ACBZ-R7

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PMIC, or Power Management Integrated Circuit, is a device which provides power management input, output and control functions for electrical and electronic systems.LED Drivers are a type of PMIC that provide a regulated output current specifically for driving Light Emitting Diodes (LEDs). The ADP1650ACBZ-R7 is a high-efficiency, low-input Voltage LED Driver, designed specifically to drive LEDs from an input voltage of 2.3V to 5.5V.

Introduction

The ADP1650ACBZ-R7 is a PMIC device designed for driving LEDs in applications such as portable devices and widely accepted consumer products. The circuit features high efficacy, low-input voltage capabilities, making it especially suited for green-energy and low-profile point-of-load applications. It is available in a 4mm x 4mm QFN package, with a 10-pin configuration. It employs an integrated PMOS transistor and current-sense resistors in the output stage to provide a regulated output current to the LEDs, providing a wide range of current at adjustable switching frequency.

Application Field and Working Principle

The ADP1650ACBZ-R7 is designed for applications requiring low voltage, high efficiency LED Driver to drive both white and single-color LEDs. It is suitable for driving up to six strings of LEDs with up to 10A current. It can also reduce the size of the system and power supply design. The device requires a minimum input voltage of 2.3V, making it suitable for low-voltage, battery-powered applications. It can maintain stable LED brightness over the entire input voltage range.

The ADP1650ACBZ-R7 features a PMOS power switch, current-sense resistors, a digital output stage and LED current regulation. The PMOS power switch is used to drive the LEDs with the current specified by the current-sense resistors during the ‘on’ moments of the pulse width modulation (PWM) control. The digital output stage is used to modulate the brightness of the LEDs in order to extend the dynamic range and maintain constant LED current regardless of input voltage and LED temperature changes. The LED current regulation ensures that the LED current remains constant over the entire load range by adjusting the duty cycle of the PWM signal.

The device is available with a range of selectable LED current profiles that are optimized for different applications. It includes a serial of programmable frequency switching, wide output current range, accurate current regulation and adaptive voltage drop compensation. The ADP1650ACBZ-R7 also features protection against over-temperature, under-voltage lockout, output over-current and reverse input protection. In addition, it features a selectable analog/digital current control for seamless integration into existing power management systems.

Conclusion

The ADP1650ACBZ-R7 is a low-input voltage, high-efficiency LED Driver, designed specifically to drive LEDs from 2.3V to 5.5V. It employs an integrated PMOS transistor and current-sense resistors to provide a regulated output current to the LEDs and can maintain stable LED brightness over the entire input voltage range. The device includes a serial of programmable frequency switching, wide output current range, accurate current regulation and adaptive voltage drop compensation. It also features protection for under-voltage lockout, output over-current, reverse input protection and over-temperature.

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