FL7930 FAIRCHILD [Fairchild Semiconductor], FL7930 Datasheet - Page 8

• Manufacturer Part Number: FL7930
• Description: Single-Stage Flyback and Boundary-Mode PFC
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

© 2011 Fairchild Semiconductor Corporation
FL7930 • Rev. 1.0.0
Comparison of FL6961, FL7930B, and FL7930C
Comparison of FL7930B and FL7930C
Frequency Limit
PFC Ready Pin
Startup without
THD Optimizer
Control Range
Compensation
Soft-Start and
Control Range
Compensation
AC Absent
Function
Overshoot
Detection
OVP Pin
Function
RDY Pin
OVP Pin
TSD
FL6961
External
None
None
None
None
None
None
None
FL7930B
Integrated
Integrated
None
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
FL7930B
Internal
None
FL7930C
Integrated
Integrated
None
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
FL7930C
Internal
None
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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
User Choice for the Use of Pin #2
FL7930B : OVP
FL7930C : RDY
Advantages
Remark
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