UC2825DW

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UC2825DW is a DC-DC switching controllers specifically designed for off-line and DC to DC converter applications. It is an highly integrated device including a burst, mode, PWM switching controller and a frequency modulated current-mode(FMCM) control circuitry. The burst and pulse-width modulation (PWM) switching controllers are designed to provide excellent load regulation in converters that work in either continuous conduction mode (CCM) or discontinuous conduction mode (DCM). The UC2825DW features a leading edge blanking function, under-voltage lockout (UVLO), over-voltage protection (OVP), soft start, a line compensation network, internal single shot, a ramp compensation network, burst mode offset, adaptive dead time control and external voltage clamp. In addition, the current-mode control circuitry includes a peak current mode, a fixed frequency oscillator, DC gain compensation, a line compensation network and a current sense amplifier.

The UC2825DW provides a well regulated output voltage with excellent load and line regulation. It is suitable for voltage regulation, power supply and battery charger applications. It can be used in a wide variety of applications, such as DC/DC converters, off-line converters, biosensors and relay circuits. The device operates from a 4.75 to 60V input voltage range, and can generate output voltages from 5 to 28V. It is designed to regulate the output voltage in either continuous conduction or discontinuous conduction modes. It features wide input voltage tolerance and low output voltage ripple.

The working principle of the UC2825DW is based on the use of a PWM/Burst control circuitry as well as a current-mode control circuit. The PWM and burst control circuitry regulate the output voltage by controlling the frequency and duty cycle of the switching pulses. The current-mode control circuitry measures the output current and adjusts the switching waveform in order to maintain a steady-state output current. This helps to reduce the output voltage error and improve the transient load response. The current-mode control also allows the device to eliminate the need for an external current sensing circuit and provide a wide output voltage range.

Overall, UC2825DW is an integrated DC/DC switching controller, specifically designed for high performance, functioning in CCM, DCM and burst mode operations. It is suitable for a wide range of applications including voltage regulation, relay control and battery charging. The device features excellent load and line regulation, low output voltage ripple and wide input voltage tolerance. It is an ideal solution for off-line and DC to DC converter applications.

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