FSDM0365RNB Fairchild Semiconductor, FSDM0365RNB Datasheet - Page 14

• 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

FSDL0365RNB, FSDM0365RNB
the output voltages start to drop at a rate dependent on the
standby current load. This causes the feedback voltage to
rise. Once it passes V
The feedback voltage then falls and the process repeats.
Burst mode operation alternately enables and disables
switching of the power Sense FET thereby reducing switch-
ing loss in Standby mode.
7. Frequency Modulation : EMI reduction can be accom-
plished by modulating the switching frequency of a switched
power supply. Frequency modulation can reduce EMI by
spreading the energy over a wider frequency range than the
band width measured by the EMI test equipment. The
amount of EMI reduction is directly related to the depth of
the reference frequency. As can be seen in Figure 10, the fre-
quency changes from 65KHz to 69KHz in 4mS for the
FSDM0365RNB. Frequency modulation allows the use of a
cost effective inductor instead of an AC input mode choke to
satisfy the requirements of world wide EMI limits.
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waveform
0.5V
0.3V
Current
Feedback
Figure 10. Frequency Modulation Waveform
D rain to
S ource
curren t
D rain to
voltage
S ource
Figure 9. Circuit for Burst Operation
Burst Operation
T urn-on
Switching OFF
O scillator
Inte rnal
BURH
W aveform
65kH z
V ds
(500mV) switching resumes.
69kH z
67kH z
69kH z
Burst Operation
Switching OFF
T u rn-off
po int
4kH z
Normal Operation
Figure 12. FSDX-series FPS Full Range EMI Scan (67KHz,
Figure 11. KA5-series FPS Full Range EMI scan(67KHz,
with Frequency Modulation) with DVD Player SET
no Frequency Modulation) with DVD Player SET
Frequency (MHz)
Frequency (MHz)
CISPR2QB
CISPR2AB
CISPR2QB
CISPR2AB