FAN102 Fairchild Semiconductor, FAN102 Datasheet

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FAN102

Manufacturer Part Number
FAN102
Description
The primary-side PWM controller significantly simplifies power supply design that requires CV and CC regulation capabilities
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2008 Fairchild Semiconductor Corporation
FAN102 Rev. 1.0.3
FAN102
Primary-Side-Control PWM Controller
Features
Applications
Ordering Information
Part Number
FAN102MY
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
Green Mode: Frequency Reduction at Light Load
Fixed PWM Frequency at 42kHz with Frequency
Hopping to Reduce EMI
Cable Voltage Drop Compensation in CV Mode
Low Startup Current: 10μA
Low Operating Current: 3.5mA
Peak-Current-Mode Control in CV Mode
Cycle-by-Cycle Current Limiting
V
V
Gate Output Maximum Voltage Clamped at 18V
Fixed Over-Temperature Protection with Auto-
Restart
SOP-8 Package Available
Battery Chargers for Cellular Phones, Cordless
Phones, PDA, Digital Cameras, Power Tools
Replaces Linear Transformer and RCC SMPS
Offline High Brightness (HB) LED Drivers
DD
DD
Over-Voltage Protection with Auto-Restart
Under-Voltage Lockout (UVLO)
Temperature Range
-40°C to +105°C
Operating
Eco Status
Green
8-Lead, Small Outline Package (SOP-8)
Description
The primary-side PWM controller significantly simplifies
power supply design that requires CV and CC regulation
capabilities. The FAN102 controls the output voltage
and current precisely with the information in the primary
side of the power supply, not only removing the output
current sensing loss, but eliminating all secondary
feedback circuitry.
The green-mode function with a low startup current
(10µA) maximizes the light-load efficiency so the power
supply can meet stringent standby power regulations.
Compared
regulation approach, the FAN102 can reduce total cost,
component
simultaneously increasing efficiency, productivity, and
system reliability.
A typical output CV/CC characteristic envelope is shown
in Figure 1.
Figure 1.
with
Package
count,
Typical Output V-I Characteristic
a
size,
conventional
and
weight;
secondary-side
Tape & Reel
April 2009
www.fairchildsemi.com
Packing
Method
while

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FAN102 Summary of contents

Page 1

... The green-mode function with a low startup current (10µA) maximizes the light-load efficiency so the power supply can meet stringent standby power regulations. Compared with regulation approach, the FAN102 can reduce total cost, component count, simultaneously increasing efficiency, productivity, and system reliability. A typical output CV/CC characteristic envelope is shown in Figure 1 ...

Page 2

... Internal Block Diagram 7 VDD + - 16V/5V OSC with Frequency Hopping Green Mode Controller GND 6 © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0 TAR FAN102 R G ATE ...

Page 3

... PWM Signal Output. This pin outputs PWM signal and includes the internal totem-pole output 8 GATE driver to drive the external power MOSFET. The clamped gate output voltage is 18V. © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 F- Fairchild Logo Z- Plant Code X- 1-Digit Year Code Y- 1-Digit Week Code ...

Page 4

... The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter T Operating Ambient Temperature A © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 Parameter (1,2) <50°C) A Conditions Min. -40 4 Min ...

Page 5

... COMV Current-Sense Section Propagation Delay to GATE t PD Output t Minimum On Time at No Load MIN-N t Minimum On Time in CC Mode MINCC Threshold Voltage for Current V TH Limit © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 Conditions Min. V =20V OSC V =2V =3V, C =1nF CS L 0< ...

Page 6

... Output Clamp Voltage CLAMP Over-Temperature-Protection Section Threshold Temperature for T OTP (3) OTP Note: 3. When over-temperature protection is activated, the power system enters auto restart mode and output is disabled. © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 Conditions Min. 2.475 f =f -2KHz, S OSC V =2. =1KHz ...

Page 7

... Temperature (ºC) Figure 8. Operating Current (I vs. Temperature 2.525 2.515 2.505 2.495 2.485 2.475 -40 -30 - Temperature (ºC) Figure 10. Reference Voltage (V © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 5.5 5.3 5.1 4.9 4.7 4 100 125 -40 ) Figure 7. DD- 100 125 ...

Page 8

... Temperature G 3 2.5 2 1.5 1 0.5 0 -40 -30 - Temperature (ºC) Figure 16. Green Mode Starting Voltage on COMV Pin (V ) vs. Temperature N © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0 100 125 -40 Figure 13. Minimum Frequency at CCM (f 1250 1170 1090 1010 930 ...

Page 9

... Figure 20. Output Sink Current (I vs. Temperature 2 1.6 1.2 0.8 0.4 0 -40 -30 - Temperature (ºC) Figure 22. Variation Test Voltage on COMR Pin for Cable Compensation (V vs. Temperature © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0 100 125 -40 ) Figure 19. Output Source Current (I V-SINK 60 58 ...

Page 10

... During constant voltage regulation mode, V duty cycle while V is saturated to high. During COMI constant current regulation mode, V duty cycle while V is saturated to HIGH. COMV © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 discontinuous input voltage ( Gate ). Then ...

Page 11

... As V decreases below 0.8V, the switching COMV frequency is fixed at 550Hz and FAN102 enters deep green mode, where the operating current reduces to 1mA, further reducing the standby power consumption. © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 ...

Page 12

... MOSFET remains off. This causes V When V reaches the V turn-off voltage of 5V, the DD DD current consumed by FAN102 reduces to the startup current (typically 10µA) and the current supplied startup resistor charges the V capacitor. When V DD the turn-on voltage of 16V, FAN102 resumes normal © ...

Page 13

... C COMV C 68nF COMI R COMV 200kΩ R COMI 43kΩ © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 Input Voltage Range 90~265V SM V2.0 and CEC regulation with enough margin and Pin=0.123W for 230V 115V60Hz (70.7% avg ...

Page 14

... Typical Application Circuit (Continued) Transformer specification Core: EE16 Bobbin: EE16 Primary-Side Inductance Primary-Side Effective Leakage © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 Pin Specification 1-3 2.3mH ± 5% 100kHz, 1V 1-8 Short one of the secondary windings 65μH ± 5%. 14 Remark www.fairchildsemi.com ...

Page 15

... 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/. © 2008 Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 5.00 4.80 A 3.81 ...

Page 16

... Fairchild Semiconductor Corporation FAN102 Rev. 1.0.3 16 www.fairchildsemi.com ...

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