UDN2916B

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PMIC (Power Management IC) motor drivers, controllers, and other related solutions have become increasingly important components of modern electronic systems due to their ability to provide precise voltage and current control. In this context, the UDN2916B is an attractive option, particularly in applications where space-saving solutions are needed. This article will provide an overview of the UDN2916B\'s application field and working principle.

Application Field

The UDN2916B is a voltage/current control IC from Texas Instruments. It is specifically designed for use in brushed DC motor applications such as ceiling fans, power tools, and electric vehicles. The UDN2916B is a dual full-bridge driver IC with a built-in current sense amplifier. It provides a current limit of up to 1.2A and a voltage limit of up to 36V. In addition, it supports a wide range of operating temperature (-40°C to 125°C) and a wide supply voltage range (5V to 36V).

Working Principle

The UDN2916B features four switching outputs that can be independently controlled over a range of 0.8V-9V. When operating with a single input voltage, the UDN2916B can be used to control two motors running in opposite directions. The two sets of complementary outputs (OUT1/OUT2 and OUT3/OUT4) feature independent under-voltagelockout (UVLO) circuitry and independent outputs current-limit circuitry. This ensures that each motor can be powered selectively, while over-current and short-circuit conditions are avoided.

The UDN2916B supports several types of control inputs, including analog voltage, pulse density modulation (PDM), and frequency modulation (FM). Depending on the application, the user can select the appropriate control input to gain maximum efficiency and accuracy. The PDM and FM inputs provide good control and protection, as they allow the user to easily adjust the speed, torque, and direction of the motor without affecting its output frequency.

The UDN2916B also features built-in protection circuitry to protect against voltage, current, and temperature overstress conditions. The on-board thermal shutdown circuitry ensures the device is shut down in the event of a thermal overload, while the internal ESD protection circuits protect the device from electrostatic discharges. Additionally, the UDN2916B includes over-current and under-voltage protection to ensure the safe operation of the motor.

In summary, the UDN2916B provides an excellent solution for small- to large-scale applications requiring high-power motor control. Its flexible design and integrated protection features ensure reliable operation in even the most challenging environments. It is a proven solution in a variety of applications, such as ceiling fans, power tool motors, and electric vehicles.

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