FSQ0370RLA Fairchild Semiconductor, FSQ0370RLA Datasheet

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FSQ0370RLA

Manufacturer Part Number
FSQ0370RLA
Description
IC PWM/SENSEFET 700V 3A 8-LSOP
Manufacturer
Fairchild Semiconductor
Series
FPS™r
Datasheet

Specifications of FSQ0370RLA

Output Isolation
Isolated
Frequency Range
92kHz ~ 108kHz
Voltage - Input
9 V ~ 20 V
Voltage - Output
700V
Power (watts)
27W
Operating Temperature
-25°C ~ 85°C
Package / Case
8-SOP, 8-LSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
© 2011 Fairchild Semiconductor Corporation
FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2
FSQ0370RNA, FSQ0370RLA
Green Mode Fairchild Power Switch (FPS™)
Features
Applications
Ordering Information
Part Number
FSQ0370RNA
FSQ0370RLA
Internal Avalanche Rugged 700V SenseFET
Consumes Only 0.8W at 230V
Burst-Mode Operation
Precision Fixed Operating Frequency: 100kHz
Internal Startup Circuit and Built-in Soft-Start
Pulse-by-Pulse Current Limiting, 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
Auxiliary Power Supply for PC and Server
SMPS for VCR, SVR, STB, DVD, and DVCD Player
Printer, Facsimile, and Scanner
Adapter for Camcorder
8-Lead, Dual Inline Package (DIP)
8-Lead, LSOP
Package
AC
& 0.5W Load with
Marking Code
Q0370RA
Description
The FSQ0370 consists of an integrated Current Mode
Pulse Width Modulator (PWM) and an avalanche rugged
700V SenseFET. It is specifically designed for high-
performance offline Switched Mode Power Supplies
(SMPS)
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
compensated
compensation and fault protection circuitry.
Compared to a discrete MOSFET and controller or RCC
switching converter solution, the FSQ0370 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,
such 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 Offline 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 Converters
with
(TSD)
precision
minimal
BV
700V
DSS
protection,
external
current
100KHz
f
OSC
and
sources
components.
R
March 2012
DS(ON)(MAX)
www.fairchildsemi.com
temperature-
4.75Ω
for
loop
The

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FSQ0370RLA Summary of contents

Page 1

... FSQ0370RNA 8-Lead, Dual Inline Package (DIP) FSQ0370RLA 8-Lead, LSOP © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Description The FSQ0370 consists of an integrated Current Mode Pulse Width Modulator (PWM) and an avalanche rugged & 0.5W Load with 700V SenseFET specifically designed for high- ...

Page 2

... 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 © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Vstr Drain Ipk PWM Vfb Vcc Source Figure 1 ...

Page 3

... Minimizing the length of the trace connecting these pins to the transformer decreases leakage inductance. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Figure 3. Pin Configuration (Top View) Description reaches the UVLO upper threshold (12V) that the internal startup switch ...

Page 4

... Junction-to-Top Thermal Resistance JT Notes: 7. Free-standing with no heat-sink, without copper clad. 8. Measured on the drain pin, close to the plastic interface. 9. Measured on the package top surface. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 =25°C, unless otherwise specified. A Parameter (5) (6) Parameter (7) (8) (9) 4 Min ...

Page 5

... Startup Charging Current Supply Voltage STR STR Notes: 10. Pulse test: Pulse width ≤ 300μs, duty ≤ 2%. 11. These parameters, although guaranteed, are not 100% tested in production. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Condition V =700V =560V, V =0V, DS ...

Page 6

... Typical Performance Characteristics Characteristic graphs are normalized at T Figure 4. Operating Frequency (f Figure 6. Maximum Duty Cycle (D Figure 8. Start Threshold Voltage (V © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 =25° vs. T Figure 5. Over-Voltage Protection (V OSC A ) vs. T Figure 7. Operating Supply Current (I MAX ...

Page 7

... Typical Performance Characteristics Characteristic graphs are normalized at T Figure 10. Feedback Source Current (I Figure 12. Peak Current Limit (I © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 =25° vs. T Figure 11. Startup Charging Current ( vs. T LIM vs www.fairchildsemi.com ...

Page 8

... Leading-Edge Blanking (LEB) circuit to inhibit the PWM comparator for a short time (t SenseFET is turned on. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 4. Protection Circuits: The FPS protective functions include Protection (OVP), Under-Voltage Lockout (UVLO), and Thermal Shutdown (TSD). Because these protection ...

Page 9

... I LIM Figure 16. Soft-Start Function © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 6. Burst Operation: To minimize power dissipation in Standby Mode, the FPS enters Burst Mode. Feedback voltage decreases as the load decreases and, as shown in Figure 17, the device automatically enters Burst Mode when the feedback voltage drops below V 600mV) ...

Page 10

... D a feedback gain resistor ( shown in Figure 20. F © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Figure 20. Typical Feedback Network of FPS™ Reference Materials AN-4134 — Design Guidelines for Offline Forward Converters Using Fairchild Power Switch (FPS™) AN-4137 — Design Guidelines for Offline Flyback Converters Using Fairchild Power Switch (FPS™ ...

Page 11

... Low EMI through frequency modulation  Internal soft-start: 10ms  Line UVLO function can be achieved using external components © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Input Voltage Universal Input 15W (85-264V ) AC Key Design Notes  ...

Page 12

... Schematic © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Figure 21. Demonstration Circuit 12 www.fairchildsemi.com ...

Page 13

... Insulation: Polyester Tape t = 0.025mm, 2-Layer Table 3. Electrical Characteristics Inductance Leakage Core & Bobbin  Core: EER2229 ( PL-7, 37.2mm  Bobbin: BE2229 © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 EE2229 1 2 Np Figure 22. Transformer Schematic Diagram Wire Turns φ ...

Page 14

... D1 SB540 ZD1 1N4745 DL1 1N5233 ZP1 82V (1W) ZDS1 P6KE180A © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Quantity Description (Manufacturer) 2 Ceramic Capacitor 1 AC Ceramic Capacitor(X1 & Y1) 1 Mylar Capacitor 1 SMD Ceramic Capacitor Low Impedance Electrolytic Capacitor KMX series (Samyoung ...

Page 15

... Layout © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Figure 23. Top Image of PCB Figure 24. Bottom of Image of PCB 15 www.fairchildsemi.com ...

Page 16

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0 .400 10 ...

Page 17

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Figure 26. 8-Lead, MLSOP 17 www.fairchildsemi.com ...

Page 18

... Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 18 www.fairchildsemi.com ...

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