LA5797MC-BH

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The LA5797MC-BH is a DC/DC Switching Regulator chip from Sanken Electric Co. Ltd. It is a high-performance low-profile switching regulator designed for applications that require high power efficiency and low power consumption. The LA5797MC-BH is operating from a wide input voltage range of 2.5V to 16V and has the ability to deliver up to 10A of output current at a frequency of up to 1MHz while maintaining a low output voltage ripple of 5mV.

The LA5797MC-BH switch regulator includes built-in features such as soft start, short circuit protection, under voltage lockout and over temperature protection in order to ensure reliability and safety. It also includes a hybrid consists of a PWM control and constant on-time control which offers excellent line and load transient response as well. Furthermore, the LA5797MC-BH supports up to 4 programmable voltage settings and has the ability to adjust the switching frequency from 100kHz to 1MHz.

In terms of application fields, the LA5797MC-BH can be used in various power management solutions requiring high-current, low-power and low-noise performance. It is suitable for applications such as LED lighting, battery charging, automotive and automotive electronics systems, industrial equipment, security systems and consumer electronics.

The working principle of the LA5797MC-BH can be broken down into five main stages. In the first stage, the input voltage is rectified and filtered to produce a stable DC voltage. This is then fed into the second stage, which is the control section, where the voltage is compared with the reference voltage. The reference voltage determines the peak switch current, and the discrepancy is used to control the output voltage.

In the third stage, the PWM comparator generates an output signal, which is used to control the ON and OFF times of the MOSFET switches. The fourth stage is the switching stage in which the MOSFETs are alternately switched ON and OFF, so that the input voltage is converted into the desired output voltage. The output voltage is also adjusted via the FB pin to ensure that it is as close as possible to the reference voltage. Finally, in the fifth stage, the output voltage passes through an output filter and is then made available to the load, resulting in a stabilized DC voltage.

In summary, the LA5797MC-BH is an advanced, high-efficiency DC/DC switching regulator chip developed by Sanken Electric Co. Ltd. It is ideal for applications that require low-noise, low-power and high-current performance. The chip boasts features such as short circuit protection, soft start, programmable voltage settings and adjustable frequency up to 1MHz. In terms of application fields, the chip is suitable for LED lighting, battery charging, automotive and consumer electronics systems, as well as industrial and security systems.

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