FSDM0365RNB Fairchild Semiconductor, FSDM0365RNB Datasheet - Page 15

• Manufacturer Part Number: FSDM0365RNB
• Description: IC SWIT PWM GREEN CM OVP HV 8DIP
• Manufacturer: Fairchild Semiconductor

Specifications of FSDM0365RNB

• Output Isolation: Isolated
• Frequency Range: 61 ~ 73kHz
• Voltage - Input: 8 ~ 20 V
• Voltage - Output: 650V
• Power (watts): 30W
• Operating Temperature: 25°C ~ 140°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: FSDM0365RNB_NL; FSDM0365RNB_NL

8. Adjusting Current limit function: As shown in fig 13, a
combined 2.8kΩ internal resistance is connected into the
non-inverting lead on the PWM comparator. A external
resistance of A on the current limit pin forms a parallel resis-
tance with the 2.8kΩ when the internal diodes are biased by
the main current source of 900uA.
For example, FSDx0365RNB has a typical Sense FET cur-
rent limit (I
limited to 1A by inserting a 2.4kΩ between the current limit
pin and ground which is derived from the following equa-
tions:
2.15: 1 = 2.8kΩ : XkΩ ,
X = 1.3kΩ,
Since X represents the resistance of the parallel network, A
can be calculated using the following equation:
A = X / (1 - (X/2.8kΩ))
Current
Limit
Feed
Back
AK
Ω
3
4
OVER
Figure 13. Peak current adjustment
) of 2.15A. The Sense FET current can be
5uA
900uA
0
8 .
2
K
K
Ω
Ω
Rsense
comparator
SenseFET
Sense
PWM
FSDL0365RNB, FSDM0365RNB
15