FSQ100 Fairchild Semiconductor, FSQ100 Datasheet - Page 3

• Manufacturer Part Number: FSQ100
• Description: IC SWIT PWM GREEN OVP HV 8DIP
• Manufacturer: Fairchild Semiconductor

Specifications of FSQ100

• Output Isolation: Isolated
• Frequency Range: 61 ~ 73kHz
• Voltage - Input: 8 ~ 20 V
• Voltage - Output: 650V
• Power (watts): 8W
• Operating Temperature: 25°C ~ 145°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power Switch Family: FSQ100
• Power Switch On Resistance: 16Ohm
• Output Current: 475mA
• Number Of Outputs: Single
• Mounting: Through Hole
• Supply Current: 1.5mA
• Package Type: PDIP W
• Operating Temperature (min): -25C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Pin Count: 8
• Power Dissipation: 1.4W
• On Resistance (max): 16 Ohms
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Maximum Power Dissipation: 1400 mW
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2007 Fairchild Semiconductor Corporation
FSQ100 Rev. 1.0.2
Pin Assignments
Pin Definitions
Pin #
6,7,8
1
2
3
4
5
Name
Drain
GND
V
V
V
NC
STR
CC
FB
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
V
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
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
pin and ground. Once the V
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.
CC
reaches the UVLO upper threshold (9V), the internal startup switch opens and device power
Figure 3.
GND
V
V
NC
CC
FB
Pin Configuration (Top View)
CC
1
2
3
4
reaches 9V, the internal switch stops charging the capacitor.
STR
) via an internal switch during startup (see Figure 2). When
3
Description
8
7
6
5
Drain
Drain
Drain
V
STR
fb
from 3V to 4.5V
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CC