FL7930CMX View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FL7930CMX

Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting

Fairchild Semiconductor 

Comparison of FL6961, FL7930B, and FL7930C

Function

OVP Pin

FL6961

None

PFC Ready Pin

None

Frequency Limit

None

AC Absent

Detection

None

Soft-Start and

Startup without

Overshoot

None

Control Range

Compensation

None

THD Optimizer

TSD

External

None

FL7930B

Integrated

None

Integrated

Integrated

Integrated

Integrated

Internal

Integrated

FL7930C

None

Integrated

Integrated

Integrated

Integrated

Integrated

Internal

Integrated

Advantages

 No External Circuit for Additional OVP

 Reduced Power Loss and BOM Cost Due to

Additional OVP Circuit

 No External Circuit for PFC Output UVLO

 Reduced Power Loss and BOM Cost Due to

PFC Out UVLO Circuit

 Versatile Open-Drain Pin

 Abnormal CCM Operation Prohibited

 Abnormal Inductor Current Accumulation Can

Be Prohibited

 Increased System Reliability with AC On-Off

Test

 Guaranteed Stable Operation at Short Electric

Power Failure

 Reduced Voltage and Current Stress at Startup

 Eliminates Audible Noise due to Unwanted

OVP Triggering

 Can Avoid Burst Operation at Light Load and

High Input Voltage

 Reduced Probability of Audible Noise Due to

the Burst Operation

 No External Resistor is Needed

 Stable and Reliable TSD Operation

 Converter Temperature Range Limited Range

Comparison of FL7930B and FL7930C

Function

RDY Pin

OVP Pin

Control Range

Compensation

FL7930B

None

Integrated

Integrated

FL7930C

Integrated

None

Integrated

Remark

 User Choice for the Use of Pin #2

FL7930B : OVP

FL7930C : RDY

© 2011 Fairchild Semiconductor Corporation

FL7930 • Rev. 1.0.0

8

www.fairchildsemi.com

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