FSQ0370RNA Fairchild Semiconductor, FSQ0370RNA Datasheet - Page 3

• Manufacturer Part Number: FSQ0370RNA
• Description: IC SWIT PWM GREEN OVP UVLO 8DIP
• Manufacturer: Fairchild Semiconductor
• Series: FPS™r

Specifications of FSQ0370RNA

• Output Isolation: Isolated
• Frequency Range: 92kHz ~ 108kHz
• Voltage - Input: 9 V ~ 20 V
• Voltage - Output: 700V
• Power (watts): 27W
• Operating Temperature: 25°C ~ 140°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power Switch Family: FSQ0370
• Power Switch On Resistance: 4Ohm
• Output Current: 970mA
• Number Of Outputs: Single
• Mounting: Through Hole
• Supply Current: 3mA
• Package Type: PDIP
• Operating Temperature (min): -25C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Pin Count: 8
• Power Dissipation: 1.5W
• On Resistance (max): 4 Ohms
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Maximum Power Dissipation: 1500 mW
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FSQ0170RNA, FSQ0270RNA, FSQ0370RNA Rev. 1.0.2
© 2006 Fairchild Semiconductor Corporation
Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
Drain
Drain
Drain
GND
V
V
I
FB
PK
CC
str
Figure 3. Pin Configuration (Top View)
Ground. SenseFET source terminal on primary side and internal control
ground.
Power Supply. Positive supply voltage input. Although connected to an aux-
iliary transformer winding, current is supplied from pin 5 (V
switch during start-up, see Figure 2. It is not until V
threshold (12V) that the internal start-up switch opens and device power is
supplied via the auxiliary transformer winding.
Feedback. The feedback voltage pin is the non-inverting input to the PWM
comparator. It has a 0.9mA current source connected internally while a capac-
itor and opto-coupler are typically connected externally. A feedback voltage of
6V triggers overload protection (OLP). There is a time delay while charging ex-
ternal capacitor C
time delay prevents false triggering under transient conditions, but still allows
the protection mechanism to operate under true overload conditions.
Peak Current Limit. This pin adjusts the peak current limit of the SenseFET.
The 0.9mA feedback current source is diverted to the parallel combination of
an internal 2.8kΩ resistor and any external resistor to GND on this pin. This
determines the peak current limit. If this pin is tied to V
typical peak current limit is 0.8A (FSQ0170RNA), 0.9A (FSQ0270RNA), or
1.1A (FSQ0370RNA).
Start-up. This pin connects to the rectified AC line voltage source. At start-up,
the internal switch supplies internal bias and charges an external storage ca-
pacitor placed between the V
the internal switch is opened.
SenseFET drain. High-voltage power SenseFET drain connection.
SenseFET drain. High-voltage power SenseFET drain connection.
SenseFET drain. High-voltage power SenseFET drain connection.
GND
V
FB
I
CC
PK
FSQ0x70RNA Rev. 1.00
FB
8-DIP
3
from 3V to 6V using an internal 5µA current source. This
CC
V
Description
D
D
D
str
pin and ground. Once the V
CC
reaches the UVLO upper
CC
or left floating, the
str
CC
) via an internal
reaches 12V,
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