A6271KLPTR-T-1

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The A6271KLPTR-T-1 PMIC – LED Driver is an integrated light emitting diode (LED) driver and controller. It is specifically designed to provide an efficient, low-cost solution for controlling LEDs.

Application Field

The A6271KLPTR-T-1 PMIC – LED Driver is well suited for display backlighting and other applications where a high brightness LEDs are required. It can be used in automotive, industrial, and consumer applications.

This device is designed for driving up to 16 channels of LEDs. The high side NPN switches and low side PNP are configured in a bridge configuration for controlling the LED current of each channel. The peak current allow each side of the bridge to be up to 200mA. This high peak current makes the device ideal for applications requiring high power.

The device can be configured to operate in three different modes - current regulation, voltage regulation, and pulse width modulation (PWM). In current regulation mode, the device is controlled by a voltage reference, and the maximum peak current is limited to 200mA. In voltage regulation mode, the device is controlled by a current reference, and the maximum peak current is limited to 180mA. Lastly, in PWM mode, the device is controlled by pulse width modulation, and the current is limited to 165mA.

The A6271KLPTR-T-1 PMIC – LED Driver is designed for use in common cathode (CC) LED applications. It contains integrated LED open and LED short fault detection, which provide protection from LED failure. The device also has input under-voltage lockout and thermal shutdown protection.

Working Principle

The A6271KLPTR-T-1 PMIC – LED Driver provides an efficient, low-cost solution for controlling LEDs. The device operates in three modes: current regulation, voltage regulation, and and pulse width modulation (PWM). In each mode, the device is controlled by a voltage reference or a current reference, and the maximum peak current is limited.

In current regulation mode, the device is controlled by a voltage reference. This limits the current through the LED to the member set by the voltage reference. The voltage reference adjusts the peak current of the LED driver. The maximum peak current is limited to 200mA.

In voltage regulation mode, the device is controlled by a current reference. This limits the voltage across the LED to the member set by the current reference. The current reference adjusts the voltage of the LED driver. The maximum peak current is limited to 180mA.

In PWM mode, the device is controlled by pulses of current. The duty cycle of the pulses is adjusted to vary the voltage on the LED. The duty cycle determines the amount of current that is supplied to the LED. The maximum peak current is limited to 165mA in this mode.

The A6271KLPTR-T-1 PMIC – LED Driver also includes integrated LED open and LED short fault detection, input under-voltage lockout, and thermal shutdown protection. These features provide protection from LED failure, power loss, and thermal overload.

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