The L296 chip high current switching power supply chips for power supply

Description: The L296 chip is a high-current switching power supply component designed to operate within a voltage range of 5 to 15V and provide an output current of up to 4A. This monolithic chip incorporates several features including enhanced protection mechanisms such as soft-start, overcurrent, overheating, and over-voltage protection. The maximum output current is rated at 4A, allowing for a power output of 160W, with an adjustable output voltage ranging from 5.1 to 40V. Additionally, it includes specialized functions such as work prohibition control, synchronous control to maintain consistent operating frequency across multiple outputs, a reset circuit for state detection signals, and a crowbar overvoltage protection circuit that triggers an external protection mechanism when the output voltage exceeds a preset nominal value by 20%. The current unfolding circuit form is depicted in the accompanying figure.

The L296 high-current switching power supply chip is designed for applications requiring reliable and adjustable power supply solutions. Its capability to deliver an output voltage from 5.1V to 40V makes it versatile for various electronic devices. The chip's integration of soft-start functionality minimizes inrush current, thereby protecting connected components during power-up. Overcurrent protection ensures that the output current does not exceed safe levels, safeguarding both the power supply and the load.

The overheating protection feature prevents thermal damage by shutting down the power supply if the temperature exceeds a specified threshold. Over-voltage protection is critical in preventing damage to sensitive components by disconnecting the output when the voltage exceeds the preset limit.

The work prohibition control function allows for the power supply to be disabled during certain conditions, ensuring that energy is not wasted. Synchronous control is particularly beneficial in applications where multiple power supplies are used, ensuring that they operate at the same frequency to avoid interference and ensure stability.

The reset circuit provides a means for the system to detect its operational state, which is essential for fault detection and recovery. The crowbar overvoltage protection circuit acts as a fail-safe mechanism, providing an immediate response to over-voltage conditions by generating a drive signal to trigger external protective circuits, thus enhancing the overall reliability of the power supply system.

The current unfolding circuit, as illustrated in the accompanying figure, is integral for managing the output characteristics of the power supply, allowing for smooth transitions and stable operation under varying load conditions. This comprehensive set of features makes the L296 chip an excellent choice for applications ranging from consumer electronics to industrial equipment, where high reliability and performance are paramount. As shown by L296 chip high current switching power supply chip composed of 5 ~ 15V, 4A power supply in FIG. L296 monolithic high-current switching power supply chip features ar e: (1) improve the protection. Equipped with soft-start, overcurrent, overheating, over-voltage protection. (2) The maximum output current of 4A, power is 160W, the output voltage between 5.1 ~ 40V adjustable. (3) has a special function: Work prohibition control, synchronous control (go long way in a few slices of output, to ensure consistent operating frequency), the reset circuit (power supply can provide state detection signal), crowbar overvoltage protection circuit (when the output voltage exceeds a preset nominal voltage 20%, generating a drive signal to 100mA, it used to trigger external protection circuit).

Figure (c) shows the current unfolding circuit form.