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6W双路输出电源 STEVAL-ISA001V1

制  造  商:ST意法半导体

商品编号:STEVAL-ISA001V1

价       格:

¥937.28(含16%增值税)

数       量:

说       明:

由武汉力源信息技术股份有限公司 发货

Description

The circuit operates from 85Vac to 264Vac input voltage with an output power peak of 6W through two output voltages of 5Vdc and 12Vdc. It contains an input fuse (F2), EMI filtering (C1, L1, and C2), and the secondary regulation is provided by U2 and U3, the optocoupler and TL431 respectively. For output filtering, the components used are the output capacitors C8 and C10. These two output capacitors are sized according to the ripple current and ripple voltage specifications. The two specifications determine the ESR and RMS current capabilities of the capacitors used. An additional LC (PI) filter is added to the 5Vdc output, C9-L2 configuration, for further effective ripple and noise rejection. The AC input is rectified and filtered by the bridge BR1 and the bulk capacitor C1 to generate the high voltage DC bus applied to the primary winding of the transformer, T1. The 5Vdc output is sensed with an optocoupler. It is possible to modify the output voltages by changing the transformer turns ratio and modifying the resistance values of R7 and R8 in the feedback loop. R2 and C4 form the snubber circuit needed to reduce the voltage ringing on the drain pin and the leakage spikes.

Features

  • Switch mode General Purpose Power Supply
  • Input: 85 to 264 VAC @ 50/60 Hz
  • Output: 12V @ 0.5A
  • Output Power (peak) 6W
  • Burst Mode Operation in Standby for Blue Angel operation
  • Current Mode Control
  • Switching Frequency 60 kHz
  • Over 74% Efficiency
  • Auxiliary Undervoltage Lockout with Hysteresis
  • Output Short Circuit Protection
  • Thermal Shutdown Protection
  • Meets EN55022 Class B EMI specification

Pictures

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