Uc384248v inverter

A current source with UC3842

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UC3846: how to use 3842 for full bridge high

From no load up to full load the output voltage is controlled by OPAMP1 . This is the voltage sense loop. For higher currents up to short circuit the output current is controlled (fixed) with OPAMP2. This is the current sense loop. This is the

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(PDF) A design of flyback switched-mode power

This article is used UC3842 as the core control chip to design a flyback switched-mode power supply. The design includes the input of 36∼48V and an output of 12V and introduces a soft-switching...

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UC3842/3/4/5 Provides Low-Cost Current-Mode Control

Internally implemented circuits in-clude under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic

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6 FAQs about [Uc384248v inverter]

What is a uc3842 power supply?

APPLICATION NOTE UC3842 PROVIDES LOW-COST CURRENT-MODE CONTROL The fundamental challenge of power supply design is to simultaneously realize two conflicting objecti- ves : good electrical performance and low cost. The UC3842 is an integrated pulse width modulator (PWM) designed with both these objectives in mind.

Is uc3842 a ti product?

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use. If you have questions about quality, packaging or ordering TI products, see TI support. TI’s UC3842 is a Single ended 500KHz current mode PWM controller with 16V/10V UVLO 100% duty cycle, 0C to 70C.

How does uc3842b work?

The UC3842B, UC3843B operate as a current mode controller, whereby output switch conduction is initiated by the oscillator and terminated when the peak inductor current reaches the threshold level established by the Error Amplifier Output/Compensation (Pin 1). Thus the error signal controls the peak inductor current on a cycle−by−cycle basis.

What is a uc3842 IC?

This IC provides designers an inexpensive control- ler with which they can obtain all the performance advantages of current-mode operation. In addition, the UC3842 is optimized for efficient power sequen- cing of off-line converters and for driving increasin- gly popular POWERMOS.

What voltage does a uc3842 IC operate from?

FUNCTIONAL DESCRIPTION A block diagram of the UC3842 appears in figure 4. This IC will operate from a low impedance DC sour- ce of 10 V to 30 V. Operation between 10 V and 16 V requires a start-up bootstrap to a voltage greater than 16 V in order to overcome the undervoltage oc- kout.

How much power can a uc3842 UVLO charge?

With a start-up current of 1 mA, RIN can be as large as 100 k Ω and still charge CINwhen VAC= 90 V RMS (low line). Power dissipation in RIN would then be less than 350 mW even under high line (VAC= 130 V RMS) conditions. During UVLO, the UC3842 output driver is biased to a high impedance state.