ILD1151XUMA1

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The ILD1151XUMA1 is an LED driver IC (integrated circuit) in the Power Management IC – LED Drivers (PMIC - LED Drivers) family.

This part can be used in various applications, such as backlighting solutions in LCD displays (like tablets, notebooks, monitors, and TVs), secondary illumination of automotive instrument clusters, dashboard illumination, emergency lighting, and more. It is suitable for use in applications that require a very low quiescent current or extremely low power consumption including battery powered applications.

The ILD1151XUMA1 incorporates a wide-range buck-boost regulator as well as a DC/DC fixed/variable output, current control, and short-circuit protection. It is designed for high efficiency and excellent thermal performance. Its wide-range buck-boost feature supports input voltages down to 1.2V and the current control enables flexibility for dimming, line regulation, and temperature compensation.

The ILD1151XUMA1 is an efficient driver for driving LEDs in series/parallel/mixed configurations. Its interface provides programmable control of thermal comfort dimming (TCD) and pulse width modulation (PWM). TCD helps maintain consistent lighting levels and reduce power dissipation, while PWM modulation is used to adjust the current that is driving the LEDs.

Working principle:

The ILD1151XUMA1 uses the input voltage to drive an LED load. The circuit is a buck-boost regulator, where the input voltage is stepped down to a set voltage, and the output voltage is then boosted up to the required voltage. This type of circuit provides excellent power efficiency and can operate from both AC/DC as well as DC sources.

The IC also features an adjustable current limiter that prevents the current from exceeding the maximum allowed current, as well as a thermal shut down circuit to protect the LED driver from overheating. The IC includes several input/output pins, including an enable pin which is used to turn the LED on/off and a reference pin which sets the current. The IC also has an external resistor which sets the required output current.

It also has several features which aid in the operation of the LED driver, such as a power on reset mechanism and over-voltage protection. Additionally, there are several protection features built into the LED driver, such as over-temperature, short-circuit, and under-voltage protection, which prevent any unexpected damage to the LED driver.

In summary, the ILD1151XUMA1 is an efficient, high performance LED driver IC from the PMIC - LED drivers family with features like wide-ranging buck-boost functionality, configurable thermal comfort dimming, adjustable current control, and several protection functions. It can be used in LCD displays, automotive instrument clusters, dashboard illumination, and more.

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