EVHF500-15-S-00A

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85VAC ~ 265VAC/50Hz/60Hz, 12V/1A Evaluation Board

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  • 1
    US$ 30.00 /unit

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Product Description

The HF500-15 is a fixed-frequency, current-mode regulator with built-in slope compensation. The HF500-15 combines a 700V MOSFET of high-avalanche ruggedness and a full-featured controller into one chip to create a low-power, offline, flyback, switch-mode power supply.

The EVHF500-15-S-00A evaluation board is designed to demonstrate the capabilities of MPS’s fixed switching frequency, multi-mode flyback regulator. It is designed for general-purpose offline power supplies.

The EVHF500-15-S-00A can meet EN55022 Class B conducted EMI requirements. It has multiple protection functions, including brown in/out, overload protection (OLP), over-voltage protection (OVP), short-circuit protection (SCP), cycle-by-cycle current limiting, and over-temperature protection (OTP).

The EVHF500-15-S-00A specification is listed in the table below.

Product Features

  • 700V/4.5Ω Integrated MOSFET with High Single-Pulse Avalanche Energy
  • Fixed-Frequency, Current-Mode Control Operation with Built-In Slope Compensation
  • Frequency Foldback Down to fOSC(min) at Light Load
  • Burst Mode for Low Standby Power Consumption
  • Frequency Jittering for Reduced EMI Signature
  • Over-Power Compensation
  • Internal High-Voltage Current Source
  • VCC Under-Voltage Lockout (UVLO) with Hysteresis
  • Programmable Input B/O and Over-Voltage Protection (OVP)
  • Overload Protection (OLP) with Programmable Delay
  • Latch-Off Protection on TIMER
  • Thermal Shutdown (Auto-Restart with Hysteresis)
  • Short-Circuit Protection (SCP)
  • Programmable Soft Start (SS)

Parametrics

  • IC Supported 1HF500-15

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IC Details

HF500-15是一款内置斜坡补偿的定频电流型调节器。芯片集成了700V高雪崩强度的MOSFET和多功能的控制器,从而适用于低功率、离线、反激式开关电源。

在中、重载条件下,开关电源以固定频率运行并伴随着频率抖动,这有助于EMI测试时,在传导模式下分散能量。在轻载条件下,开关电源会固定峰值电流,并将其开关频率降低到fOSC ( min ),由此可在轻载下获得高效率。在非常轻的负载下,稳压器进入突发模式以实现低待机功耗。

全保护功能包括热关断、母线的欠压或过压保护、VCC欠压锁定( UVLO )、过载保护( OLP )、短路保护( SCP )、输入输出过压保护( OVP )和过热保护( OTP )。

HF500-15具有基于定时器的故障检测和过功率补偿功能,以确保过载状态时不受输入电压的影响。

HF500-15采用SOIC8-7B封装。