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Fairchild Semiconductor Electronic Components Datasheet



Q0370RNA

FSQ0370RNA



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Q0370RNA pdf
FSQ0170RNA, FSQ0270RNA, FSQ0370RNA
Green Mode Fairchild Power Switch (FPS™)
December 2006
Features
„ Internal Avalanche Rugged 700V SenseFET
„ Consumes only 0.8W at 230 VAC & 0.5W Load with
Burst-Mode Operation
„ Precision Fixed Operating Frequency, 100kHz
www.DataSheet4U.c„omInternal Start-up Circuit and Built-in Soft-Start
„ Pulse-by-Pulse Current Limiting and Auto-Restart
Mode
„ Over-Voltage Protection (OVP), Overload Protection
(OLP), Internal Thermal Shutdown Function (TSD)
„ Under-Voltage Lockout (UVLO)
„ Low Operating Current (3mA)
„ Adjustable Peak Current Limit
Applications
„ Auxiliary Power Supply for PC and Server
„ SMPS for VCR, SVR, STB, DVD & DVCD Player,
Printer, Facsimile & Scanner
„ Adapter for Camcorder
Description
The FSQ0170RNA, FSQ0270RNA, FSQ0370RNA
consists of an integrated current mode Pulse Width
Modulator (PWM) and an avalanche-rugged 700V Sense
FET. It is specifically designed for high-performance off-
line Switch Mode Power Supplies (SMPS) with minimal
external components. The integrated PWM controller
features include: a fixed-frequency generating oscillator,
Under-Voltage Lockout (UVLO) protection, Leading
Edge Blanking (LEB), an optimized gate turn-on/ turn-off
driver, Thermal Shutdown (TSD) protection, and
temperature compensated precision current sources for
loop compensation and fault protection circuitry.
Compared to a discrete MOSFET and controller or RCC
switching converter solution, the FSQ0170RNA,
FSQ0270RNA, FSQ0370RNA reduces total component
count, design size, and weight while increasing
efficiency, productivity, and system reliability. These
devices provide a basic platform that is well suited for the
design of cost-effective flyback converters, as in PC
auxiliary power supplies.
Related Application Notes
„ AN-4134: Design Guidelines for Off-line Forward
Converters Using Fairchild Power Switch (FPS™)
„ AN-4137: Design Guidelines for Off-line Flyback
Converters Using Fairchild Power Switch (FPS™)
„ AN-4141: Troubleshooting and Design Tips for
Fairchild Power Switch (FPS™) Flyback Applications
„ AN-4147: Design Guidelines for RCD Snubber of
Flyback
„ AN-4148: Audible Noise Reduction Techniques for
FPS™ Applications
8-DIP
Ordering Information
Product Number
FSQ0170RNA
FSQ0270RNA
FSQ0370RNA
Package
8DIP
8DIP
8DIP
Marking Code
Q0170R
Q0270R
Q0370R
BVDSS
700V
700V
700V
fOSC
100kHz
100kHz
100kHz
RDS(ON) (MAX.)
11Ω
7.2Ω
4.75Ω
FPSTM is a trademark of Fairchild Semiconductor Corporation.
© 2006 Fairchild Semiconductor Corporation
FSQ0170RNA, FSQ0270RNA, FSQ0370RNA Rev. 1.0.1
www.fairchildsemi.com



No Preview Available !

Q0370RNA pdf
Application Diagram
AC
IN
Vstr Drain
IPK PWM
FB VCC GND
DC
OUT
www.DataSheet4U.com
FSQ0x70RNA Rev. 1.01
Figure 1. Typical Flyback Application
Output Power Table(1)
Product
FSQ0170RNA
FSQ0270RNA
FSQ0370RNA
230VAC ±15%(2)
Adapter(3)
Open Frame(4)
14W
20W
17W
24W
20W
27W
85–265VAC
Adapter(3)
Open Frame(4)
9W 13W
11W
16W
13W
19W
Notes:
1. The maximum output power can be limited by junction temperature.
2. 230 VAC or 100/115 VAC with doubler.
3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink, at 50°C
ambient.
4. Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink, at 50°C
ambient.
Internal Block Diagram
VCC
2
FB 3
IPK 4
VBURL/VBURH
VCC
VCC
IDELAY
IFB
8V/12V
Normal
2.5R
R
Burst
Vstr
5
ICH
VCC good
Vref
Internal
Bias
OSC
PWM
SQ
RQ
Gate
Driver
LEB
Drain
6,7,8
VSD
VCC
Vovp
TSD
VCC good
SQ
RQ
Figure 2. Internal Block Diagram
1 GND
Soft-Start
FSQ0x70RNA Rev. 1.00
© 2006 Fairchild Semiconductor Corporation
FSQ0170RNA, FSQ0270RNA, FSQ0370RNA Rev. 1.0.1
2
www.fairchildsemi.com



Part Number Q0370RNA
Description FSQ0370RNA
Maker Fairchild - Fairchild
Total Page 17 Pages
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