LTC1142HVCG#PBF

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The LTC1142HVCG#PBF is an integrated DC/DC controller for off-line switch-mode power supplies. The device includes a high voltage MOSFET driver, error Comparator, soft-start controller, reference and current-sense amplifier, frequency compensation scheme, and on/off control circuitry. The device is capable of successfully regulating in the presence of large line and load transients, making it ideal for managing bus voltage, and DC/DC applications requiring higher efficiency and tighter regulation, better transient response and improved line/load rejection, and improved noise and ripple rejecting.

Application Field of LTC1142HVCG#PBF

The primary application of the LTC1142HVCG#PBF is as a DC/DC controller in low-voltage off-line power supplies. Its operation and design are optimized for these special applications due to its ability to regulate in the presence of large line and load transients. It has an adjustable current limiting threshold with an internal current limit setpoint and can also be used in any bus voltage monitoring applications.

Its low external parts count and low power dissipation also makes it ideal for use in space-limited areas, such as automotive, avionics and telecommunications power supplies, or any application where remote control over a high-voltage MOSFET is required. Its single feedback pin allows for a simplified layout complexity by eliminating the needs for external feedback resistor options, and the low-dropout operation of the LTC1142HVCG#PBF ensures a higher efficiency solution for extended operating temperature ranges.

Working Principle of LTC1142HVCG#PBF

The working principle of the LTC1142HVCG#PBF is similar to that of other DC/DC Controllers. It uses pulse width modulation (PWM) control to regulate the output voltage, while achieving a high efficiency application. Upon receiving the feedback signal, the LTC1142HVCG#PBF acts by adjusting the duty cycle of the PWM signal in order to obtain the required output voltage, while also protecting the MOSFET from excessive currents and temperature rise. Also, Powergood signal is used to detect both over and under voltage conditions, ensuring that the regulated output remains tightly regulated even in the event of large line or load transients.

The LTC1142HVCG#PBF is a versatile and flexible DC/DC controller and is suitable for a wide range of applications. Its Internal high voltage MOSFET driver, error Comparator, soft-start controller, reference and current-sense amplifier, and frequency compensation scheme, make it ideal for managing bus voltage, and delivering higher efficiency and tighter regulation, better transient response and improved line/load rejection, and improved noise and ripple rejection. Its adjustable current limiting threshold with an internal current limit setpoint, makes it ideal for use in any bus voltage monitoring applications, while its low power dissipation and low external parts count make it an excellent choice for space-limited applications, making it an ideal solution for automotive, avionics, and telecommunications power supplies.

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