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Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. PDF , 3. Extract from the document. PDF , Kb , File published: Sep 5, The fundamental challenge of power supply design is to realize simultaneously two conflicting objectives: good electrical performance and low cost. These inexpensive IC controllers provide all the performance advantages of current-mode operation.
In addition the UC series is optimized for efficient power-sequencing of. PDF , Kb , File published: Mar 4, A switching power supply consists of the power stage and the control circuit. The power stage performs the basic power conversion from the input voltage to the output voltage and includes switches and the output filter. This report addresses the buck power stage only and does not cover control circuits.
Detailed steady-state and small-signal analysis of the buck power stage operating in continuous. Simplified equations are used to develop obtainable ranges for parameters over IC tolerances. Providing the necessary features to control current-mode switched-mode power supplies this device has been improved for higher frequency off-line power supplies.
This design note describes a circuit with low startup current less than 0. Since these devices have traditionally used relatively high-voltage 35V bipolar processes powering was not a concern.
In addition many of these ICs contained high-current protection zeners to keep higher voltages from damaging the devices. With a numb. This report addresses the boost power stage only and does not cover control circuits. The report includes detailed steady-stage and small-signal analysis of the boost power stage o.
It covers practical circuit design considerations such as slope compensation gate drive circuitry external control functions synchronization and paralleling current-mode controlled modules.
Circuit diagrams and simplified equations are included. PDF , 42 Kb , File published: Sep 5, The UCC offers numerous advantages that allow the power supply design engineer to meet requirements for lower power for battery-operated equipment higher switching frequencies for reduced magnetics size higher levels of circuit integration for improved reliability and lower cost.
PDF , 61 Kb , File published: Mar 23, The switch-mode power supply primary current is often sensed using a power resistor. Using an op amp to amplify the current-sense signal can reduce cost and improve noise performance and efficiency.
Datasheet Texas Instruments UC3844N
No Preview Available! Each amplifier has its gain internally set to Application Circuit The application circuit shown in Figure 5 is designed to help clamp the voltage at the output of the driver to the desired level. Capacitor C 4 stabilizes the entire node at the anode of the clamp diode, D 3 , by creating a low impedance at high frequencies. It shows all the components necessary to optimize perfor- mance as well as to protect against damage from a CRT arc event. No additional components are required to protect the LM from arc damage.
LM2480NA Data Sheet PDF
LM2480NA National Semiconductor, LM2480NA Datasheet