ADP8861ACPZ-R7

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PMIC - LED Drivers play an important role in today’s LED industry, controlling and regulating LED systems to ensure consistent, cost-effective lighting solutions. For example, the ADP8861ACPZ-R7 is a 6-channel fully-integrated LED driver with an integrated Charge-Pump DC/DC converter. This IC enables applications requiring multiple LED PWM dimming with general purpose PWM signals.

ADP8861ACPZ-R7 Application Field

The ADP8861ACPZ-R7 is well-suited for applications requiring multiple LED dimming using general purpose PWM signals. Typical application fields include mobile, computers, communications, and rechargeable battery devices with long power-on and standby times. This further includes LCD backlighting, white LED backlighting, keypad backlighting, and camera flash applications. The device has a power consumption of under 150mW, making the chip an ideal choice in energy-efficient applications and designs. The fast switching time and low on-resistance also help drive an efficient power supply.

ADP8861ACPZ-R7 Working Principle

The ADP8861ACPZ-R7 contains six channels with each channel configurable for LED dimming or power control. This is done using two high-sink/low-source outputs and one low-sink/high-source output. All six channels are independent and are connected in series or parallel as appropriate for the application. The chip also contains an integrated Charge-Pump DC/DC converter offering adjustable voltage control and power supply isolation. The integrated and adjustable buck converter makes suitable for a variety of applications. The ADP8861ACPZ-R7 easily integrates with the PCU, enabling the system to dynamically control the LED current and voltage, allowing for a more versatile system configuration.

The charge-pump converter works in two phases: in the first phase, a certain amount of current is applied to the LEDs and in the second phase, the charge pump charges the storage capacitor. This ensures consistent current flow to all of the LEDs, allowing for stable and uniform dimming. The device also supports Dynamic Voltage Scaling (DVS) with the help of its integrated voltage reference, enabling the system to adjust the LED current and the voltage which reduces power consumption and prolongs the battery life.

Lastly, the ADP8861ACPZ-R7 also features low noise operation, over-temperature protection, over-current protection, and a power good output. The power good output monitors the output voltage, ensuring the output is within the specified level. This ensures consistent power supply and improves reliability for the system.

Conclusion

The ADP8861ACPZ-R7 is an ideal choice for applications requiring consistent current flow, adjustable voltage control and power supply isolation. Its 6-channel design makes it suitable for mobile, computers, communications and rechargeable battery-powered devices with long power-on and standby times. With a power consumption of under 150mW and its fast switching time and low on resistance, the ADP8861ACPZ-R7 is the perfect driving IC for energy-efficient LED applications and designs. Additionally, the chip’s integrated Charge-Pump DC/DC converter, adjustable voltage control and DVS allows for a powerful and power-optimized system. The chip also features low noise operation, over-temperature protection, over-current protection and a power good output, ensuring consistent power supply and reliability.

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