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  4. Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation (Monolithic Power Systems, Inc.)
Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation-HF500-40
Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation-Monolithic Power Systems, Inc.

Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation
Monolithic Power Systems, Inc.

About This Product

■Summary

The HF500-40 is a fixed frequency, current mode regulator with integrated slope compensation. The HF500-40 combines a 700V MOSFET and a full-featured controller on one chip to create a low-power, offline, flyback, switch-mode power supply. At medium and heavy loads, the regulator operates at a fixed frequency with frequency jittering. Jittering helps reduce EMI energy at the switching frequency and its harmonics. Under light load conditions, the regulator stops moving peak currents and reduces the switching frequency to 25kHz for superior efficiency. For very light loads, the controller enters burst mode to achieve low standby power consumption. Extensive protection features include power recovery and power outage, VCC undervoltage lockout (UVLO), overload protection (OLP), short circuit protection (SCP), input overvoltage protection (OVP), VCC overvoltage protection (OVP), and overtemperature protection (OTP). The HF500-40 features overpower line compensation that ensures the overload protection point is independent of the input voltage. HF500-40 is offered in PDIP8-7B package.

■Advantages

Full-featured controller for low-power, offline, flyback, switch-mode power supplies on one chip ・Multi-mode control under various load conditions ・Overpower line compensation and a series of protection functions

■Features and benefits

・700V/1Ω MOSFET integration ・Fixed frequency, current mode control operation with built-in slope compensation ・Frequency foldback down to 25kHz at light loads ・Burst mode for low standby power consumption ・Frequency jittering to reduce EMI characteristics ・Overpower compensation ・Internal high voltage current source ・VCC undervoltage lockout function with hysteresis (UVLO) ・Programmable input power outage and overvoltage protection (OVP) ・VCC overvoltage protection (OVP) ・Overload protection (OLP) with programmable delay ・Timer latch-off protection ・Over-temperature protection (OTP) (automatic restart with hysteresis) ・Short circuit protection (SCP) ・Programmable soft start (SS) ・Provided in PDIP8-7B package

  • Product

    Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation

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1 Models of Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation

Image Part Number Price (excluding tax) Control Method Type Typical Pmax (W) VCC (max) (V) Vac (max) (V) Vac (min) (V) Vbr (V) Fsw (max) (kHz) Package (mm)
Fixed frequency flyback regulator HF500-40 with multimode control and overpower line compensation-Part Number-HF500-40

HF500-40

Available upon quote

Fixed Frequency

Regulator

40

30

305

85

700

65

PDIP8-7B

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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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