EVHF920-SE-00A

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85VAC/60Hz~420VAC/50Hz  13.5V/300mA;8V/50mA;8V/50mA  Off-line Switching Regulator

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    $25.00 /unit

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Product Description

HF920 is a flyback regulator with a monolithic 900V MOSFET. HF920 provides excellent power regulation in AC-DC applications that require high reliability. The switching frequency can be programmed with a single resistor. Also a special frequency doubling mode, designed for strong magnetizing application, can be enabled through a simple external setup.

The EVHF920-SE-00A Evaluation Board is designed to demonstrate the capabilities of HF920. It is designed for off-line high input voltage (85VAC~420VAC) application with triple outputs (13.5V/300mA, 8V/50mA, 8V/50mA). The 8V output rail can power the LDO for MCU power supply.

The EVHF920-SE-00A has an excellent performance and meets EN55022 conducted EMI requirements easily with frequency jittering function. It offers a full suite of protective features such as over-temperature protection, VCC under-voltage lockout, over-voltage protection, over-load protection and short-circuit protection.

Product Features

  • Monolithic 900V/15Ω MOSFET and high voltage current source
  • Fixed switching frequency, programmable up to 150kHz
  • Current-mode control scheme
  • Frequency jittering
  • Low standby power consumption via active burst mode
  • <30mW no load consumption
  • Frequency doubling operation mode
  • Internal leading-edge blanking
  • Built-in soft-start function
  • Internal slope compensation
  • External input PRO pin protection with hysteresis and auto-restart recovery
  • Over Temperature Protection
  • VCC Under Voltage Lockout with hysteresis
  • Over Voltage Protection on VCC
  • Time-based Over Load Protection
  • Short Circuit Protection

Parametrics


900V, Fixed-Frequency, Offline Regulator w/ Ultra-Low Standby Power Consumption

The HF920 is a flyback regulator with a monolithic, 900V MOSFET. The HF920 provides excellent power regulation in AC/DC applications that require high reliability, such as smart meters, large appliances, industrial controls, and products powered by poor AC grids. The HF920 requires a minimal number of
external components. 

The HF920 uses peak-current-mode control to provide excellent transient response and easy loop compensation. When the output power falls below a given level, the regulator enters burst mode. The IC consumption is also specially optimized. As a result, the HF920 achieves very low power consumption during standby conditions. 

MPS’s proprietary, 900V, monolithic process enables an over-temperature protection (OTP) that is on the same silicon as the 900V power MOSFET, offering the most precise thermal protection. The HF920 also offers a full suite of protection features such as VCC under-voltage lockout (UVLO), overload protection (OLP), over-voltage protection (OVP), and short-circuit protection (SCP). 

The HF920 is designed to minimize electromagnetic interference for power line communications (PLC) in home and building automation applications. The operating frequency is programmed externally with a single resistor, so the power supply’s radiated energy can be designed to block interference to the PLC. In addition to the programmable frequency, the HF920 employs frequency jittering that reduces the noise level and EMI filter cost greatly. 

Frequency-doubling mode operation can be enabled through a simple external set-up. With this special operation mode, the switching frequency is doubled when the converter runs into an over-power condition. In this way, the converter is able to handle up to a 50% decrease of the transformer inductance caused by external magnetizing interference.


900V Fixed Frequency Offline Regulator with Input Under-Voltage Protection

The HF920A is a flyback regulator with a monolithic 900V MOSFET. The HF920A provides excellent power regulation in AC/DC applications that require high reliability, such as smart meters, large appliances, industrial controls, and products powered by poor AC grids. It requires a minimum number of external components.

The HF920A uses peak-current-mode control to provide excellent transient response and easy loop compensation. When the output power falls below a given level, the regulator enters burst mode. The IC consumption is specially optimized. As a result, the HF920A achieves very low power consumption in a standby condition.

The MPS proprietary 900V monolithic process enables an over-temperature protection that is on the same silicon of the 900V power MOSFET, offering the most precise thermal protection. It also offers a full suite of protection features, including VCC under-voltage lockout, overload protection, over-voltage protection, under-voltage protection, and short-circuit protection.

The HF920A is designed to minimize electromagnetic interference for PowerLine Communication (PLC) in home and building automation applications. The operating frequency is programmed externally with a single resistor, so the power supply’s radiated energy can be designed to avoid interference to the PLC. In addition to the programmable frequency, the HF920A employs frequency jittering that greatly reduces the noise level and the cost of the EMI filter.

The HF920A is available in SOIC8-7A and SOIC14-11 packages.