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| 型号： | FSQ321L |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/21页 |
| 文件大小： | 0K |
| 描述： | IC SWIT PWM GREEN OVP UVLO 8LSOP |
| 标准包装： | 50 |
| 输出隔离： | 隔离 |
| 频率范围： | 55kHz ~ 67kHz |
| 输入电压： | 9 V ~ 20 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 12W |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOP，8-LSOP |
| 供应商设备封装： | 8-LSOP |
| 包装： | 管件 |
| 产品目录页面： | 1219 (CN2011-ZH PDF) |
Pin Assignments
Pin Definitions
Figure 3.
Pin Configuration (Top View)
Pin#
1
2
3
4
5
6, 7, 8
Name
GND
V CC
Vfb
Sync
Vstr
Drain
Description
SenseFET source terminal on primary side and internal control ground.
Positive supply voltage input. Although connected to an auxiliary transformer winding,
current is supplied from pin 5 (Vstr) via an internal switch during startup (see Figure 2) .
It is not until V CC reaches the UVLO upper threshold (12V) that the internal startup switch
opens and device 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 opto-coupler are typically
connected externally. There is a time delay while charging external capacitor C fb from 3V
to 6V using an internal 5 ? A current source. This delay prevents false triggering under
transient conditions, but still allows the protection mechanism to operate under true
overload conditions.
This pin is internally connected to the sync-detect comparator for valley switching.
Typically the voltage of the auxiliary winding is used as Sync input voltage and external
resistors and capacitor are needed to make delay to match valley point. The threshold of
the internal sync comparator is 0.7V/0.2V.
This pin is connected to the rectified AC line voltage source. At startup, the internal switch
supplies internal bias and charges an external storage capacitor placed between the Vcc
pin and ground. Once the V CC reaches 12V, the internal switch is opened.
The drain pins are designed to connect directly to the primary lead of the transformer and
are capable of switching a maximum of 650V. Minimizing the length of the trace
connecting these pins to the transformer decreases leakage inductance.
? 2007 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321 ? Rev. 1.0.6
4
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FSQ321LX | 功能描述:开关变换器、稳压器与控制器 0.5A, 650V SMPS Power Switch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| FSQ3W | 制造商:RFE 制造商全称:RFE international 功能描述:FUSIBLE RESISTORS FM, FKN, & FSQ Series: Fusible |
| FSQ500HL | 功能描述:电源开关 IC - 配电 Green Mode Power Switch 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 |
| FSQ500L | 功能描述:电源开关 IC - 配电 Power Switch 0.245A 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 |
| FSQ500L_09 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Compact, Green Mode, Fairchild Power Switch |
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