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Q0370RNA Schematic ( PDF Datasheet ) - Fairchild

Teilenummer Q0370RNA
Beschreibung FSQ0370RNA
Hersteller Fairchild
Logo Fairchild Logo 




Gesamt 17 Seiten
Q0370RNA Datasheet, Funktion
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






Q0370RNA Datasheet, Funktion
Electrical Characteristics (Continued)
TA = 25°C unless otherwise specified.
Symbol
Parameter
Condition
Burst-Mode Section
VBURH
VBURL Burst-Mode Voltage
VBUR(HYS)
Protection Section
TJ = 25°C
FSQ0170RNA
ILIM Peak Current Limit FSQ0270RNA
www.DataSheet4U.com
FSQ0370RNA
tCLD
TSD
Current Limit Delay Time(10)
Thermal Shutdown Temperature(10)
VSD Shutdown Feedback Voltage
VOVP
Over-Voltage Protection
IDELAY
tLEB
Shutdown Delay Current
Leading Edge Blanking Time(10)
Total Device Section
IOP
Operating Supply Current
(control part only)
di/dt = 170mA/µs
di/dt = 200mA/µs
di/dt = 240mA/µs
VFB = 4V
VCC = 14V
ICH
VSTR
Start-Up Charging Current
Vstr Supply Voltage
VCC = 0V
VCC = 0V
Notes:
10. These parameters, although guaranteed, are not 100% tested in production.
11. Pulse test: Pulse width 300µs, duty 2%.
Min. Typ. Max. Unit
0.5 0.6 0.7
V
0.3 0.4 0.5
V
100 200 300 mV
0.70 0.80 0.90
0.79 0.90 1.01
0.97 1.10 1.23
500
125 140
5.5 6.0 6.5
18 19
3.5 5.0 6.5
200
A
ns
°C
V
V
μA
ns
135
0.70 0.85 1.00
24
mA
mA
V
© 2006 Fairchild Semiconductor Corporation
FSQ0170RNA, FSQ0270RNA, FSQ0370RNA Rev. 1.0.1
6
www.fairchildsemi.com

6 Page









Q0370RNA pdf, datenblatt
Typical Application Circuit
Application
PC Auxiliary Power Supply
(Using FSQ0270RNA)
Output power
15W
Input Voltage
Universal input
(85-265 VAC)
Output Voltage (Max. Current)
5V (3A)
Features
„ High efficiency (> 78% at 115 VAC and 230 VAC input)
„ Low standby mode power consumption (< 0.8W at 230 VAC input and 0.5W load)
„ Enhanced system reliability through various protection functions
„ Internal soft-start (10ms)
www.DataSheet4U.c„omLine UVLO function can be achieved using external component
Key Design Notes
„ The delay time for overload protection is designed to be about 30ms with C8 of 47nF. If faster/slower triggering of
OLP is required, C8 can be changed to a smaller/larger value (e.g. 100nF for about 60ms).
„ ZP1, DL1, RL1, RL2, RL3, RL4, RL5, RL7, QL1, QL2, and CL9 build a Line Under-Voltage Lockout block (UVLO).
The Zener voltage of ZP1 determines the input voltage that makes FPS turn on. RL5 and DL1 provide a reference
voltage from VCC. If the input voltage divided by RL1, RL2, and RL4 is lower than the Zener voltage of DL1, QL1 and
QL2 turn on and pull down VFB to ground.
„ An evaluation board and corresponding test report can be provided.
1. Schematic
C1
2.2nF
AC250V
RS1 CS1
9 1.5nF
L1
330μH
CON1
1
R6
2.4 1W
2
3
Input
D2 D3
1N4007 1N4007
R2
4.7k
C2
22μF
400V
D4 D5
Rop8en
1N4007 1N4007
C3
22μF
400V
C10
1nF
250V
ZP1
1N4762
ZDS1
P6KE180A
R14
30
DS1
1N4007
T1
EE2229
1 6,7
D1
SB540
3 9, 10
C4
1000μF
16V
L3
0
J1
FB
RL1 1M
RL2
DL1
1N5233B
RL5
30k
1M
U3
8 7 6 5 FSQ0270RNA
D6 R10
1N4007 2
4
5
QL1
KSP2907A
J3
open
RL4
120k
RL3
1k
J2
0
4
CL9
10μF
50V
RL7 3
40k
QL2 U1B
KSP2222A FOD817A
1234
ZD2 C8
open 47nF
R13
open
ZR1 C7
80
47μF
25V
Rop1e2n
ZD1
1N4745
L2
1μH
R3 R4
560 100
J4
0
C9
1000μF
16V
1
U1A
FOD817A
2
3
U2
TL431A
2
C6
47nF
1
R9
10k
R5
1.25k
1%
R11
1.2k
1%
CON2
1
2
Output
C5
470μF
10V
FSQ0x70RNA Rev. 1.12
Figure 21. Demo Circuit
© 2006 Fairchild Semiconductor Corporation
FSQ0170RNA, FSQ0270RNA, FSQ0370RNA Rev. 1.0.1
12
www.fairchildsemi.com

12 Page





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