Data Sheet

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7
FAN7930C — Critical Conduction Mode PFC Controller
Comparison of FAN7530 and FAN7930C
Function
FAN7530
FAN7930C
FAN7930C Advantages
PFC Ready Pin
None
Integrated
 No External Circuit for PFC Output UVLO
 Reduce Pow er Loss and BOM Cost Caused by
PFC Out UVLO Circuit
 Versatile Open-Drain Pin
Frequency Limit
None
Integrated
 Abnormal CCM Operation Prohibited
 Abnormal Inductor Current Accumulation Can Be
Prohibited
V
IN
-Absent
Detection
None
Integrated
 Increase System Reliability by Testing for Input
Supply Voltage
 Guarantee Stable Operation at Short Electric
Pow er Failure
Soft-Start and
Startup w ithout
Overshoot
None
Integrated
 Reduce Voltage and Current Stress at Startup
 Eliminate Audible Noise due to Unw anted OVP
Triggering
Control Range
Compensation
None
Integrated
 Can Avoid Burst Operation at Light Load and High
Input Voltage
 Reduce Probability of Audible Noise Due to Burst
Operation
THD Optimizer
External
Internal
 No External Resistor Needed
TSD
None
140°C w ith
60°C Hysteresis
 Stable and Reliable TSD Operation
 Converter Temperature Range Limited Range
Comparison of FAN7930C and FAN7930B
Function
FAN7930C
FAN7930B
Remark
RDY Pin
Integrated
None
 User Choice for the Use of Number #2 Pin
OVP Pin
None
Integrated