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參數(shù)資料
| 型號： | FSDH0370RNB |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Green Mode Fairchild Power Switch (FPSTM) |
| 中文描述： | 12 A SWITCHING REGULATOR, 108 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | MS-001BA, DIP-8 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大小： | 608K |
| 代理商： | FSDH0370RNB |
11
www.fairchildsemi.com
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
F
Figure 9. Frequency Modulation Waveform
8. Adjusting Peak Current Limit:
As shown in Figure
10, a combined 2.8k
Ω
internal resistance is connected to
the non-inverting lead on the PWM comparator. An
external resistance of Rx on the current limit pin forms a
parallel resistance with the 2.8k
Ω
when the internal
diodes are biased by the main current source of 900μA.
Figure 10. Peak Current Limit Adjustment
For example, FSDH0270RNB has a typical Sense FET
peak current limit (I
LIM
) of 0.9A. I
LIM
can be adjusted to
0.6A by inserting Rx between the Ipk pin and the ground.
The value of the Rx can be estimated by the following
equations:
0.9A : 0.6A = 2.8k
Ω
: Xk
Ω
,
X = Rx || 2.8k
Ω
.
(X represents the resistance of the parallel network)
t
s
f
s
=1/t
s
100kHz
97kHz
103kHz
4ms
t
Drain
Current
3
Vcc
Vcc
I
DELAY
I
FB
2k
Ω
Vfb
PWM
Comparator
4
Ipk
0.8k
Ω
Rx
SenseFET
Current
Sense
900uA
5uA
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| FSDH0565 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPSTM) |
| FSDH321 | 功能描述:電源開關(guān) IC - 配電 FPS for DVDP/STB RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| FSDH321_04 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch |
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| FSDH321LX | 制造商:Fairchild Semiconductor Corporation 功能描述:Power Switch 2A 8-Pin LSOP |
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