AH293-YG-13

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Power management integrated circuits (PMIC), such as the AH293-YG-13 can be used in range of electronic applications, but are often used to control and monitor motors, with various features and capabilities. Understanding the features and working principle of theAH293-YG-13 can help determine whether it is the best choice for a specific application.

Features of the AH293-YG-13

TheAH293-YG-13 is a CMOS-compatible IC that integrates a high-frequency PWM generator with a FET driver circuit, resulting in significant power savings in motors. Its features include:

• Input voltage between 4.5–18 V operation
• Supports motor channel current up to 1.2A
• Programmable over current protection
• Programmable Under voltage protection
• Programmable Output voltage offset
• Thermal shutdown

Working Principle of the AH293-YG-13

The AH293-YG-13 operates via pulse-width modulation (PWM). The used voltage is set using an external resistor, and the required speed is programmed using an external RC network that sets the switching frequency. When the voltage increases, the off-state duration time of the PWM increases and the opposite happens when the voltage decreases. The FET driver circuit is used to switch the output transistors on and off with a PWM signal, depending on the applied voltage.

The FET driver circuit uses two NMOS transistors which are connected in a half-bridge configuration. The FET circuit is driven by PWM signals generated in the IC, so that when the PWM pulse is high, the bottom NMOS transistor is driven on to pass the current through, and when the PWM pulse is low, the top NMOS transistor is driven off to block the current. This helps in controlling the electric current passing through the motor and regulating the speed.

In addition, the AH293-YG-13 provide over current protection and under voltage protection which help in protecting the motor by reducing the current when the overload or under voltage protection thresholds are reached. The IC also has a thermal shutdown circuit which disconnects the motor when the junction temperature rises above a certain limit.

Applications of the AH293-YG-13

The AH293-YG-13 is mainly used for controlling brush motors, such as DC motors or fan motors, or solenoid valves. It can be used in range of applications including power supplies, air conditioners, motors for automotive, audio, and printer applications.

In addition, the AH293-YG-13 can be used for various other automotive applications, such as power window control and wide band control. With the AH293-YG-13, it is possible to control the speed of the fan motor and monitor the current, making it an ideal choice for controlling and monitoring motors in various applications.

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