?2010 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
FAN7930B " Rev. 1.0.3
7
 
Comparison of FAN7530 and FAN7930B
Function
FAN7530
FAN7930B
FAN7930B Advantages
OVP Pin
None
Integrated
?   No External Circuit for additional OVP 
?   Reduction of Power Loss and BOM Cost Caused 
by Additional OVP Circuit 
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 
Power Failure
Soft-Start and
Startup without
Overshoot
None
Integrated
?   Reduce Voltage and Current Stress at Startup 
?   Eliminate Audible Noise Due to Unwanted 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 is Needed 
TSD
None
140癈 with
60癈 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
 
 
 
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