FAN7930C Просмотр технического описания (PDF) - Fairchild Semiconductor

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производитель

FAN7930C

Critical Conduction Mode PFC Controller

Fairchild Semiconductor 

Comparison of FAN7530 and FAN7930C

Function

FAN7530

PFC Ready Pin

None

Frequency Limit

None

VIN-Absent Detection

None

Soft-Start and

Overshoot

Prevention

THD Optimizer

TSD

None

External

None

FAN7930C

FAN7930C Advantages

ƒ No External Circuit for PFC Output UVLO

Integrated

ƒ Reduce Power Loss and BOM Cost Caused by

PFC Out UVLO Circuit

ƒ Versatile Open-Drain Pin

ƒ Abnormal CCM Operation Prohibited

Integrated

ƒ Abnormal Inductor Current Accumulation can be

Prohibited

ƒ Increase System Reliability by testing for input

Integrated

supply voltage

ƒ Guarantee Stable Operation at Short Electric

Power Failure

ƒ Reduce Voltage and Current Stress at Startup

Integrated

ƒ Eliminate Audible Noise due to Unwanted OVP

Triggering

Internal

ƒ No External Resistor is Needed

140°C with 60°C ƒ Stable and Reliable TSD Operation

Hysteresis

ƒ Converter Temperature Range Limited Range

Comparison between FAN7930 and FAN7930C

Function

RDY Threshold

RDY Hysteresis

Control Range

Compensation

FAN7930

2.240V

0.600V

None

FAN7930C

2.240V

0.189V

Integrated

FAN7930C Remark

ƒ If PFC rated output voltage is assumed 390V:

FAN7930: VRDY_HIGH trigger voltage = 349V

VRDY_LOW trigger voltage = 256V

FAN7930C: VRDY_HIGH trigger voltage = 349V

VRDY_LOW trigger voltage = 320V

© 2010 Fairchild Semiconductor Corporation

FAN7930C • Rev. 1.0.0

7

www.fairchildsemi.com

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