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PDF ( 数据手册 , 数据表 ) FAN103

零件编号 FAN103
描述 Primary-Side-Regulation PWM Controller
制造商 Fairchild Semiconductor
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FAN103 数据手册, 描述, 功能
October 2009
FAN103
Primary-Side-Regulation PWM Controller
Features
ƒ Low Standby Power Under 30mW
ƒ High Voltage Startup
ƒ Fewest External Component Counts
ƒ Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
ƒ Green-Mode Function: Linearly-Decreasing PWM
Frequency
ƒ Fixed PWM Frequency at 50kHz with Frequency
Hopping to Solve EMI Problem
ƒ Cable Compensation in CV Mode
ƒ Peak-Current-Mode Control in CV Mode
ƒ Cycle-by-Cycle Current Limiting
ƒ VDD Over-Voltage Protection with Auto Restart
ƒ VDD Under-Voltage Lockout (UVLO)
ƒ Gate Output Maximum Voltage Clamped at 15V
ƒ Fixed Over-Temperature Protection with
Auto Restart
ƒ Available in the 8-Lead SOP Package
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Applications
ƒ Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, power tools, etc.
ƒ Replaces linear transformer and RCC SMPS
Description
This third-generation Primary-Side-Regulation (PSR)
and highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. The proprietary topology,
TURECURRENT™, of FAN103 enables precise CC
regulation and simplified circuit for battery charger
applications. A low-cost, smaller and lighter charger
results as compared to a conventional design or a linear
transformer.
To minimize standby power consumption, the
proprietary green-mode function provides off-time
modulation to linearly decrease PWM frequency under
light-load conditions. This green mode assists the power
supply in meeting the power conservation requirement.
By using the FAN103, a charger can be implemented
with few external components and minimized cost. A
typical output CV/CC characteristic envelope is shown
in Figure 1.
VO
Maximum
Minimum
Before Cable Compensation
After Cable Compensation
IO
Figure 1. Typical Output V-I Characteristic
Ordering Information
Part Number
FAN103MY
Operating
Temperature Range
-40°C to +105°C
Eco
Status
Package
Packing Method
Green 8-Lead, Small Outline Package (SOP-8) Tape & Reel
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html
© 2009 Fairchild Semiconductor Corporation
FAN103 • Rev. 1.0.1
www.fairchildsemi.com







FAN103 pdf, 数据表
Typical Performance Characteristics
450
420
390
360
330
300
-40 -30 -15
0 25 50 75
Temperature (ºC)
85 100 125
16
15
14
13
12
11
10
-40 -30 -15
0 25 50 75
Temperature (ºC)
85 100 125
Figure 12. Minimum Frequency at No Load
(fOSC-N-MIN) vs. Temperature
Figure 13. Minimum Frequency at CCM (fOSC-CM-MIN)
vs. Temperature
3
2.5
2
1.5
1
0.5
0
-40 -30 -15
0 25 50 75
Temperature (ºC)
85 100 125
1100
1050
1000
950
900
850
800
-40 -30 -15
0 25 50 75
Temperature (ºC)
85 100 125
Figure 14. Supply Current Drawn from Pin HV (IHV)
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vs. Temperature
Figure 15. Minimum On Time at No Load (tMIN-N)
vs. Temperature
2.7
2.62
2.54
2.46
2.38
2.3
-40 -30 -15
0 25 50 75
Temperature (ºC)
85 100 125
Figure 16. Green Mode Starting Voltage
on EA_V (VN) vs. Temperature
0.65
0.56
0.47
0.38
0.29
0.2
-40 -30 -15
0 25 50 75
Temperature (ºC)
85 100 125
Figure 17. Green Mode Ending Voltage
on EA_V (VG) vs. Temperature
© 2009 Fairchild Semiconductor Corporation
FAN103 • Rev. 1.0.1
8
www.fairchildsemi.com







FAN103 equivalent, schematic
www.DataSheet4U.com
© 2009 Fairchild Semiconductor Corporation
FAN103 • Rev. 1.0.1
16
www.fairchildsemi.com










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