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  4. Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920 (Monolithic Power Systems, Inc.)
Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920-HF920
Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920-Monolithic Power Systems, Inc.

Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920
Monolithic Power Systems, Inc.

About This Product

■Summary

HF920 is a flyback regulator with a monolithic 900V MOSFET. The HF920 provides superior power control for AC/DC applications that require high reliability, such as smart meters, large appliances, industrial controls, and products powered from inadequate AC power 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 predetermined level, the regulator enters burst mode. IC consumption is also specially optimized. As a result, the HF920 has very low power consumption in standby. MPS' proprietary 900V monolithic process enables overtemperature protection (OTP) on the same silicon as the 900V power MOSFET, providing the most accurate thermal protection. The HF920 also offers rich protection features such as VCC undervoltage lockout (UVLO), overload protection (OLP), overvoltage protection (OVP), and short circuit protection (SCP). The HF920 is designed to minimize electromagnetic interference in power line communications (PLC) in home and building automation applications. The operating frequency is programmed externally using a single resistor, so it can be designed to avoid radiated energy from the power supply interfering with the PLC. In addition to programmable frequencies, the HF920 employs frequency jittering, which significantly reduces noise levels and EMI filter costs. Frequency doubling mode of operation can be enabled through simple external setup. This special mode of operation doubles the switching frequency when the converter is in an overpower condition. In this way, the converter can accommodate up to 50% reduction in inductance in the transformer caused by external magnetization disturbances.

■Features and benefits

・Monolithic 900V/15Ω MOSFET and high voltage current source ・Fixed switching frequency, programmable up to 150kHz ・Current mode control method ・Frequency jittering ・Low standby power consumption due to active burst mode ・<30mW no-load power consumption ・Frequency doubling operation mode

  • Product

    Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920

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1 Models of Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920

Image Part Number Price (excluding tax) Control Method Type Typical Pmax (W) Vac (max) (V) Vac (min) (V) Vbr (V) Fsw (max) (kHz) Package (mm)
Flyback Secondary Regulation 900V, Fixed Frequency, Offline Regulator with Ultra-Low Standby Power Consumption HF920-Part Number-HF920

HF920

Available upon quote

Fixed Frequency

Regulator

10

440

85

900

150

SOIC14-11, SOIC8-7

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About Company Handling This Product

Monolithic Power Systems, Inc.

Company Overview

Monolithic Power Systems (MPS), founded in 1997 and headquartered in San Jose, California, is a manufacturer o...

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Switch Regulators　Monolithic Power Systems, Inc.
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