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参数资料
| 型号： | FSDL321L |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 13/20页 |
| 文件大小： | 0K |
| 描述： | IC SWIT PWM GREEN CM OVP HV 8SOP |
| 产品变化通告： | Passivation Layer Change 07/Dec/2007 Product Discontinuation 03/Dec/2009 |
| 标准包装： | 50 |
| 输出隔离： | 隔离 |
| 频率范围： | 45kHz ~ 55kHz |
| 输入电压： | 8 V ~ 20 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 17W |
| 工作温度： | 25°C ~ 140°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP |
| 其它名称： | FSDL321L_NL FSDL321L_NL-ND |
FSDH321, FSDL321
8. Adjusting Current limit function: As shown in fig 12, a
combined 2.8k ? 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 2.8k ? when the internal diodes are biased by
the main current source of 900uA.
Feed
Back
3
5uA
900uA
2 K ?
PWM
comparator
Current
Limit
4
0 . 8 K ?
AK ?
Rsense
SenseFET
Sense
Figure 12. Peak current adjustment
For example, FSDH321 has a typical Sense FET current
limit (I LIM ) of 0.7A. The Sense FET current can be limited
to 0.5 by inserting a 7k ? between the current limit pin and
ground which is derived from the following equations:
0.7: 0.5 = 2.8k ? : Xk ? ,
X = 2k ? ,
Since X represents the resistance of the parallel network, A
can be calculated using the following equation:
A = X / (1 - (X/2.8k ? ))
Layout Considerations
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FSDL321L_Q | 功能描述:电源开关 IC - 配电 FPS for DVDP/STB RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| FSDLC01G-S | 制造商:AXIOMTEK 制造商全称:AXIOMTEK 功能描述:Capacity: 128MB to 32GB |
| FSDLC128-S | 制造商:AXIOMTEK 制造商全称:AXIOMTEK 功能描述:Capacity: 128MB to 32GB |
| FSDLC16G-S | 制造商:AXIOMTEK 制造商全称:AXIOMTEK 功能描述:Capacity: 128MB to 32GB |
| FSDLC256-S | 制造商:AXIOMTEK 制造商全称:AXIOMTEK 功能描述:Capacity: 128MB to 32GB |
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