ADM8845ACPZ-REEL7 Integrated Circuits (ICs)

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The ADM8845ACPZ-REEL7 (ADM8845) is a multi-channel LED driver designed for the Power Management Integrated Circuit (PMIC) market. It is designed for LED applications in automotive, wearables, and a variety of other industries. The ADM8845 has a wide array of features which make it ideal for LED driver applications, including a wide input voltage range, integrated over-voltage and under-voltage protection, low power consumption, and an onboard adjustable PWM dimming capability. It also includes an internal oscillator, enabling a variety of speeds, and enables multiple programmable light dimming modes. The ADM8845 is a very efficient LED driver, capable of driving up to four strings of six LEDs in series with a total LED forward voltage of 5.6V.

The ADM8845 is a high-efficiency low dropout (LDO) LED driver, supporting up to amaximum of 850mA output current and a minimum dropout of 200mV at various output currents. It has a wide operating temperature range of -40°C to +105°C and is also capable of supporting a wide range of input voltages from 8V to 30V. It features over-voltage and under-voltage protection, with an adjustable OVP threshold and an adjustable UVLO-threshold. Internally, the ADM8845 features a low power switching regulator circuit with an integrated PWM start-up circuit which eliminates the need for an external start-up resistors for the current source. The PWM operation also allows for adjustable light dimming control with a minimum PWM frequency of 500 Hz. The PWM clock frequency is adjustable with internally divider ratios, while the duty cycle of the PWM is adjustable with externally programmable resistor dividers. The ADM8845 also includes an internal oscillator, providing a variety of speeds, and an additional shutdown function that enables multiple programmable dimming modes from linear-fade to slow-blink and on/off modulation.

The ADM8845 also features a low operating power consumption of about 1µA in shutdown mode and a total harmonic distortion (THD) of below 1%. It can operate in either a fixed-frequency push-pull or in a quasi-resonant mode. Furthermore, the ADM8845 comes with built-in two-level current foldback protection, resulting in more robust protection against over-currents and ACLs. Lastly, the ADM8845 offers a variety of input voltage, shutdown control, PWM dimming and multiple on/off modulation outputs.

In summary, the ADM8845 offers a superior power management solution for LED drivers in automotive, wearables, and a variety of other industries. The device is designed for high efficiency, low dropout, wide input voltage range, adjustable over-voltage and under-voltage protection, low power consumption, and an integrated adjustable PWM dimming module. The device supports up to 850 mA output current and a minimum dropout of 200mV at various output currents. It can operate in either a fixed-frequency push-pull mode or in a quasi-resonant mode and comes with on-chip two-level current foldback protection and adjustable clock frequency to enable perfect dimming performance. The ADM8845 is a versatile and efficient LED driver, ideal to be used in automotive, wearables, and other digital devices.

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