参数资料
型号: FSQ100
厂商: Fairchild Semiconductor
文件页数: 3/12页
文件大小: 0K
描述: IC SWIT PWM GREEN OVP HV 8DIP
标准包装: 50
输出隔离: 隔离
频率范围: 61 ~ 73kHz
输入电压: 8 V ~ 20 V
输出电压: 650V
功率(瓦特): 8W
工作温度: 25°C ~ 145°C
封装/外壳: 8-DIP(0.300",7.62mm)
供应商设备封装: 8-DIP
包装: 管件
Pin Assignments
GND
V CC
V FB
NC
1
2
3
4
8
7
6
5
Drain
Drain
Drain
V STR
Pin Definitions
Figure 3.
Pin Configuration (Top View)
Pin #
1
2
3
4
5
6,7,8
Name
GND
V CC
V FB
NC
V STR
Drain
Description
Ground . 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 (V STR ) via an internal switch during startup (see Figure 2). When
V CC reaches the UVLO upper threshold (9V), the internal startup switch opens and device power
is supplied via the auxiliary transformer winding.
Feedback . Inverting input to the PWM comparator with its normal input level lies between 0.5V
and 2.5V. It has a 0.4mA current source connected internally, while a capacitor and opto-
coupler are typically connected externally. A feedback voltage of 4.5V triggers overload
protection (OLP). There is a time delay while charging external capacitor C fb from 3V to 4.5V
using an internal 5μA current source. This time delay prevents false triggering under transient
conditions, but still allows the protection mechanism to operate in true overload conditions.
No Connection .
Startup . This pin connects directly to the rectified AC line voltage source. At startup, the internal
switch supplies internal bias and charges an external storage capacitor placed between the V CC
pin and ground. Once the V CC reaches 9V, the internal switch stops charging the capacitor.
SenseFET Drain . 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
FSQ100 Rev. 1.0.2
3
www.fairchildsemi.com
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