LM5141RGET

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The LM5141RGET is a high performance synchronous buck PWM controller that provides ultra-fast transient response and low EMI conversion. It is designed for 60 V DC/DC and AC/DC applications and is suitable for use in all kinds of motor drives. This PWM controller is designed with a wide operating voltage range, adjustable operating current limit, and configurable short circuit, thermal, and bias protection schemes.

The LM5141RGET has an integrated 600V MOSFET gate driver and also includes an integrated, adjustable current source. This feature allows the user to adjust the current sense threshold to compensate for low line resistance which can lead to over current conditions. This feature also provides improved transient response and reduces ringing.

The LM5141RGET is suitable for applications such as servers and multiple processor systems, telecom infrastructure, industrial automation, and motor drive controls. It is configurable to a wide range of output voltages and currents, and the MOSFET gate driver provides a low-resistance path for high-speed transient switching without external components.

The working principle of the LM5141RGET is based on PWM (Pulse Width Modulation) control. This control is based on varying the total amount of voltage in each pulse as determined by the duty cycle. Typically, a PWM signal has a defined frequency, with the duty cycle of each pulse determining the “high” and “low” sections of the signal. The duty cycle is then modified accordingly to provide the desired output voltage and current.

The duty cycle is determined by the “enable” signal, which is pulsed high or low. A high enable signal will turn the LM5141RGET on and a low enable signal will turn it off. The enable signal can be used to adjust the output voltage and current as programmed using a control voltage. The control voltage can be directly applied to the voltage regulator or generated by a PWM loop.

The integrated current source of the LM5141RGET provides the option of a current limit that can be adjusted depending on the application. If the load current exceeds the programmed current limit, the current source will cut off the regulator and stop the supply current. This prevents the controller from becoming over-currented and damaging the load device.

The LM5141RGET is designed for 60 V DC/DC and AC/DC applications and is suitable for motor drives. The PWM controller has an adjustable operating current limit and configurable short circuit, thermal, and bias protection schemes that ensure the system stays in a safe operating state even under extreme conditions.

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