FAN7602C Fairchild Semiconductor, FAN7602C Datasheet

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FAN7602C

Manufacturer Part Number
FAN7602C
Description
The FAN7602C is a green current-mode PWM controller
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2009 Fairchild Semiconductor Corporation
FAN7602C • Rev. 1.0.0
FAN7602C
Green Current Mode PWM Controller
Features
Applications
Related Resources
Ordering Information
Part Number
FAN7602CMX
Green Current Mode PWM Controller
Random Frequency Fluctuation for Low EMI
Internal High-Voltage Startup Switch
Burst Mode Operation
Line Voltage Feedforward to Limit Maximum Power
Line Under-Voltage Protection
Latch Protection & Internal Soft-Start (10ms) Function
Overload Protection
Over-Voltage Protection
Over-Temperature Protection
Low Operation Current: 1mA Typical
8-Pin DIP/SOP
Adapter
LCD Monitor Power
Auxiliary Power Supply
AN-6014- Green Current Mode PWM Controller
(Except for frequency fluctuation part in AN-6014)
FAN7602CN
FAN7602CM
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Operating Junction
-40°C to +150°C
Temperature
Eco Status
RoHS
Description
The FAN7602C is a green current-mode PWM controller.
It is specially designed for off-line adapter applications;
DVDP, VCR, LCD monitor applications; and auxiliary
power supplies.
The internal high-voltage startup switch and the burst
mode operation reduce the power loss in standby mode.
As a result, the input power is lower than 1W when the
input line voltage is 265V
load condition, input power is under 0.15W.
The maximum power can be limited constantly,
regardless of the line voltage change, using the power
limit function.
The switching frequency is not fixed and it has random
frequency fluctuation.
The FAN7602C includes various protections for the
system reliability and the internal soft-start prevents the
output voltage over-shoot at startup.
Package
8-SOP
8-DIP
Tape and Reel
AC
Packing
Method
and the load is 0.5W. At no-
Rail
Rail
Top Mark
FAN7602C
FAN7602C
FAN7602C
www.fairchildsemi.com
April 2009

FAN7602C Summary of contents

Page 1

... For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Description The FAN7602C is a green current-mode PWM controller specially designed for off-line adapter applications; DVDP, VCR, LCD monitor applications; and auxiliary power supplies. ...

Page 2

... Typical Application Diagram Internal Block Diagram 1 LUVP 2V/1.5V SS End 10ms Soft Start Latch/ Latch 2 Plimit 4V Plimit Offset Generator © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 LUVP V STR Latch/ NC Plimit FAN7602C CS/ GND Out Figure 1. Typical Flyback Application V STR 8 LUVP OLP Auto Restart ...

Page 3

... Startup Pin. This pin is used to supply IC operating current during IC startup. After 8 V STR startup, the internal JFET is turned off to reduce power loss. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Figure 3. Pin Configuration (Top View) Description 3 voltage is lower than 5V. For CC www.fairchildsemi.com ...

Page 4

... Thermal Impedance Symbol θ Thermal Resistance JA Note: 1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Parameter Human Body Model, JESD22-A114 Charged Device Model, JESD22-C101 Parameter (1) , Junction-to-Ambient 4 Min. Max. ...

Page 5

... K Offset Gain Plimit Output Section V Output Voltage High OH V Output Voltage Low OL (2) t Rising Time R (2) t Falling Time F © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Condition V = 30V 25°C STR A V Increasing CC V Decreasing 25°C A Output Not Switching V = 0.2V 25°C ...

Page 6

... Line Under-Voltage Protection V LUVPon Off Over-Voltage Protection OVP T SD Shutdown Temperature HYS Note: 2. These parameters, although guaranteed, are not 100% tested in production. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 (Continued) Condition ( 25° 25° 25°C A (2) 6 Min. ...

Page 7

... Temperature [°C] Figure 6. UVLO Hysteresis vs. Temperature 1.50 1.40 1.30 1.20 1.10 1.00 0.90 0.80 -50 - Temperature [°C] Figure 8. Operating Supply Current vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0. 100 125 -50 Figure 5. Stop Threshold Voltage vs. Temperature 1.40 1.30 1.20 1.10 1.00 0.90 0.80 0.70 0.60 - 100 125 Figure 7. Startup Threshold Current vs. Temperature 1 ...

Page 8

... Temperature [°C] Figure 10. Burst On/Off Voltage vs. Temperature 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 -50 - Figure 12. Offset Gain vs. Temperature 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 -50 - Figure 14. OVP Voltage vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 (Continued). 1.20 1.15 1.10 CSFB2 CSFB3 1.05 1.00 0.95 0.90 0.85 0. 100 125 -50 Figure 11. Operating Frequency vs. Temperature 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 - 100 125 Figure 13 ...

Page 9

... Figure 16. LUVP On-to-Off Voltage vs. Temperature 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 -50 - Temperature [°C] Figure 18. CS/FB Threshold Voltage vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 (Continued) 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 - 100 125 Figure 17. LUVP Off-to-On Voltage vs. Temperature 50 75 100 125 9 - 100 Temperature [°C] www ...

Page 10

... Application Information 1. Startup Circuit and Soft-Start Block The FAN7602C contains a startup switch to reduce the power loss of the external startup circuit of the conventional PWM converters. The internal startup circuit charges the V capacitor with 0.9mA current CC source if the AC line is connected. The startup switch is turned off 15ms after IC starts up, as shown in Figure 19 ...

Page 11

... Figure 23. The Burst+ is the sum of the CS/FB voltage and Plimit offset voltage. The FAN7602C enters the burst mode when the offset voltage of the Burst+ is higher than 0.95V and exits the burst mode when the offset voltage is lower than 0.88V. ...

Page 12

... R109 should be designed carefully to make the V no load. R110 should be designed carefully to make the V at full load. R103 should be designed to keep the MOSFET V shorted. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Input Voltage Universal input 48W (85 ~ 265 voltage higher than 8V when the input voltage is 265 V ...

Page 13

... C103 C104 R113 C102 C110 R107 R101 C107 C101 FUSE AC INPUT 2. Inductor Schematic Diagram 1 Np2 2 Np1 Vcc 6 © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 R206 D202 D204 D101 9 3 R114 D102 6 Q101 R105 C109 5 R102 1 8 LUVP Vstr ...

Page 14

... Insulation: Polyester Tape t = 0.03mm, 2 Layers N p2 Outer Insulation: Polyester Tape t = 0.03mm, 2 Layers 4. Electrical Characteristics Inductance Inductance 5. Core & Bobbin Core: EER2828 Bobbin: EER2828 2 Ae(mm ): 82.1 © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Wire φ 3 → Copper Tape φ 12 → Copper Tape φ ...

Page 15

... R203 20kΩ R204 27kΩ R205 7kΩ R206 10Ω R207 10kΩ IC IC101 FAN7602C IC201 KA431 OP1, OP2 H11A817B © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Note Part C101 C102 C103, C104 C105 1/4W C106 1/2W C107 1/4W C108 1/4W C109 1/2W C110 1/4W C201, C202 ...

Page 16

... PCB Layout Minimize leakage DC Link LUVP Place these cap. close Performance Data Input Power at No Load Input Power at 0.5W Load OLP Point © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 inductance OUT str CC Latch/P CS/FB GND ...

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/. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 Figure 29. 8-Lead Dual In-Line Package (DIP) 17 www.fairchildsemi.com ...

Page 18

... 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/. © 2009 Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0 ...

Page 19

... Fairchild Semiconductor Corporation FAN7602C • Rev. 1.0.0 19 www.fairchildsemi.com ...

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