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CS3972 - 1.25A High Efficiency Switching Regulator

Description

The CS3972 is a 1.25A, 60V, current mode, high efficiency, switching regulator circuit.

It can be configured in buck, boost, forward, isolated and non-isolated topologies, using a single-ended switch.

Features

  • s 75VMAX, 2APEAK Internal Switch s 3V to 60V Input Voltage Range s 6mA Input Supply Current s 1.24V Precision Reference s 40kHz Switching Frequency s Variable Current Limit with External Voltage Clamp s Under-Voltage Protection s Over-Temperature Protection s External Synchronization Package Options Block Diagram NC VC VFB VSW VIN 2.3V Reg Output Protection 1 16L SO Wide Gnd NC E2 VSW NC E1 NC VIN NC NC NC 40kHz OSC Logic Driver 1.25A, 75V Switch NC NC + VC COMP Gnd 1 8L PDIP E2 VSW E.

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Datasheet Details

Part number CS3972
Manufacturer Cherry Semiconductor Corporation
File Size 186.50 KB
Description 1.25A High Efficiency Switching Regulator
Datasheet download datasheet CS3972 Datasheet

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Full PDF Text Transcription

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CS3972 CS3972 1.25A High Efficiency Switching Regulator Description The CS3972 is a 1.25A, 60V, current mode, high efficiency, switching regulator circuit. It can be configured in buck, boost, forward, isolated and non-isolated topologies, using a single-ended switch. The IC contains a 1.25A high efficiency output switch, precision bandgap reference, voltage regulator, error amplifier, oscillator, control, and protection circuitry. Output transistor efficiency is achieved by keeping the switch in quasi-saturation when it is on. This minimizes the switch turn-off delay time and power dissipation, an important consideration for applications with wide ranging loads. The precision reference is internally trimmed to 1.24V, while the oscillator frequency is internally trimmed to 40kHz.
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