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參數資料
| 型號： | FSDL0365 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Green Mode Fairchild Power Switch (FPSTM) |
| 中文描述： | 綠色模式飛兆功率開關（FPSTM） |
| 文件頁數： | 11/20頁 |
| 文件大?。?/td> | 905K |
| 代理商： | FSDL0365 |
FSDL0365RNB, FSDM0365RNB
11
Figure 8. Burst Operation Function
7. Frequency Modulation
: Modulating the switching fre-
quency of a switched power supply can reduce EMI. Fre-
quency modulation can reduce EMI by spreading the energy
over a wider frequency range than the bandwidth 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 9, the frequency changes from 65KHz
to 69KHz in 4ms for the FSDM0365RNB (48.5KHz to
51.5KHz for FSDL0365RNB). 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.
Figure 9. Frequency Modulation Waveform
Figure 10. KA5-series FPS Full Range EMI scan(67KHz,
no Frequency Modulation) with DVD Player SET
Figure 11. FSDX-series FPS Full Range EMI Scan (67KHz,
with Frequency Modulation) with DVD Player SET
V
BURH
Switching
OFF
Current
Waveform
Burst
Operation
Normal
Operation
V
FB
V
BURL
Switching
OFF
Burst
Operation
3
Vcc
Vcc
I
DELAY
I
FB
R
2.5R
Vfb
V
BURL
/V
BURH
PWM
+
-
V
BURH
Vcc
I
BUR(pk)
Burst
Normal
MOSFET
Current
t
s
f
s
=1/t
s
67kHz
65kHz
69kHz
4ms
t
Drain
Current
Frequency (MHz)
A
μ
V
Frequency (MHz)
A
μ
V
相關PDF資料 |
PDF描述 |
|---|---|
| FSDL0365RL | Green Mode Fairchild Power Switch (FPSTM) |
| FSDL0365RN | Green Mode Fairchild Power Switch (FPSTM) |
| FSDM0265RNB | Green Mode Fairchild Power Switch (FPS) |
| FSDM0265RL | Green Mode Fairchild Power Switch (FPSTM) |
| FSDM0265RN | Green Mode Fairchild Power Switch (FPSTM) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FSDL0365RL | 功能描述:電源開關 IC - 配電 POWER_CONVERSION RoHS:否 制造商:Exar 輸出端數量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| FSDL0365RN | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPS TM) |
| FSDL0365RN_05 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPSTM) |
| FSDL0365RNB | 功能描述:電源開關 IC - 配電 SMPS Power Switch Built-in Soft Start RoHS:否 制造商:Exar 輸出端數量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| FSDL321 | 功能描述:電源開關 IC - 配電 FPS for DVDP/STB RoHS:否 制造商:Exar 輸出端數量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
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