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参数资料
| 型号： | FSDL321L |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 3/20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
Pin Definitions
Pin Number
1
2
3
4
5
6, 7, 8
Pin Name
GND
Vcc
Vfb
Ipk
Vstr
Drain
Pin Function Description
Sense FET source terminal on primary side and internal control ground.
Positive supply voltage input. Although connected to an auxiliary transform-
er winding, current is supplied from pin 5 (Vstr) via an internal switch during
startup (see Internal Block Diagram section). It is not until Vcc reaches the
UVLO upper threshold (12V) that the internal start-up switch opens and de-
vice power is supplied via the auxiliary transformer winding.
The feedback voltage pin is the non-inverting input to the PWM comparator.
It has a 0.9mA current source connected internally while a capacitor and op-
tocoupler are typically connected externally. A feedback voltage of 6V trig-
gers over load protection (OLP). There is a time delay while charging
between 3V and 6V using an internal 5uA current source, which prevents
false triggering under transient conditions but still allows the protection
mechanism to operate under true overload conditions.
Pin to adjust the current limit of the Sense FET. The feedback 0.9mA current
source is diverted to the parallel combination of an internal 2.8k ? resistor
and any external resistor to GND on this pin to determine the current limit.
If this pin is tied to Vcc or left floating, the typical current limit will be 0.7A.
This pin connects directly to the rectified AC line voltage source. At start up
the internal switch supplies internal bias and charges an external storage
capacitor placed between the Vcc pin and ground. Once the Vcc reaches
12V, the internal switch is disabled.
The Drain pin is designed to connect directly to the primary lead of the trans-
former and is capable of switching a maximum of 650V. Minimizing the
length of the trace connecting this pin to the transformer will decrease leak-
age inductance.
Pin Configuration
8DIP
8LSOP
GND 1
Vcc 2
Vfb 3
Ipk 4
8 Drain
7 Drain
6 Drain
5 Vstr
Figure 3. Pin Configuration (Top View)
3
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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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