LM21212AMH-1/NOPB

PMIC - Voltage Regulators - DC DC Switching Regulators

The LM21212AMH-1/NOPB is a switch mode current mode PWM controller designed to regulate output voltage in a wide range of applications. It features a standard PWM current mode topology, operating at a frequency of up to 500kHz, allowing for fast transient response and excellent AC line transient and AC line load transients. The controller utilizes a standard PWM-controlled switch to regulate the output voltage, along with an optional low-side driver to provide low-side control.

The LM21212AMH-1/NOPB is designed to operate from a wide range of input voltages ranging from 8V to 45V, and can support up to 10A output current. It includes a comprehensive set of protection features including over-temperature protection, output over-current protection (short circuit) and over-voltage protection.

Features

• Wide range of adjustable output voltage range.
• High-efficiency synchronous PWM control.
• On-chip thermal protection.
• Over-current protection with current sense.
• Under-voltage protection.
• Low EMI profile.

Application Field

The LM21212AMH-1/NOPB is a switch mode current mode PWM controller which is suitable for use in a variety of applications. As it provides low-side switch control capabilities and over-voltage protection, it is well suited for use in DC-DC power supply systems. Since the controller provides a wide range of operating voltages, it can be used in a variety of applications such as telecom, datacom, automotive, computing, industrial and consumer applications.

The controller is also suitable for battery-powered systems, as it can handle a wide range of input and output voltages. With its low-side switch control capability and over-voltage protection, it is suitable for use in battery-powered systems designed to provide the highest level of performance and safety. Additionally, it can be used in a variety of adapter and charger applications.

Working Principle

The LM21212AMH-1/NOPB is a current-mode PWM controller that utilizes a synchronous rectifier for the output stage. It uses a control signal to regulate the voltage output, with a feedback path from the output to the controller. The feedback signal is used to compare the desired voltage output with the actual voltage output, and an error signal is generated and used to adjust the switch duty cycle of the synchronous rectifier.

The controller includes a current sense input for monitoring the output current, which provides protections against over-current conditions. It also includes a low-side driver which allows for control of the low-side switch. In addition, the controller features over-temperature protection, under-voltage protection and over-voltage protection.

The LM21212AMH-1/NOPB is designed to operate at a wide range of frequencies, allowing it to adjust the output voltage to track changes in line and load conditions. With its wide range of operating voltages and a robust set of protection features, the LM21212AMH-1/NOPB is suitable for a variety of applications.