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What is FAN103?

This electronic component, produced by the manufacturer "Fairchild Semiconductor", performs the same function as "Primary-Side-Regulation PWM Controller".


FAN103 Datasheet PDF - Fairchild Semiconductor

Part Number FAN103
Description Primary-Side-Regulation PWM Controller
Manufacturers Fairchild Semiconductor 
Logo Fairchild Semiconductor Logo 


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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
www.DataSheet4U.com
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

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FAN103 equivalent
Electrical Characteristics
Unless otherwise specified, VDD=15V and TA=25°C.
Symbol
Parameter
Conditions
VDD Section
VOP Continuously Operating Voltage
VDD-ON Turn-On Threshold Voltage
VDD-OFF Turn-Off Threshold Voltage
IDD-OP Operating Current
IDD-GREEN Green-Mode Operating Supply Current
VDD-OVP VDD Over-Voltage Protection Level
VDD-OVP- Hysteresis Voltage for VDD OVP
HYST
tD-VDDOVP VDD Over-Voltage-Protection Debounce Time
HV Startup Current Source Section
VHV-MIN Minimum Startup Voltage on HV Pin
IHV
IHV-LC
Supply Current Drawn from Pin HV
Leakage Current after Startup
VDC=100V
HV=500V, VDD=VDD-
OFF +1V
Oscillator Section
Center Frequency
fOSC
Frequency
Frequency Hopping Range
tFHR
fOSC-N-MIN
fOSC-CM-MIN
fDV
fDT
Frequency Hopping Period
Minimum Frequency at No-Load
Minimum Frequency at CCM
Frequency Variation vs. VDD Deviation
Frequency Variation vs. Temperature
Deviation
VDD=10~25V
TA=-40°C to +105°C
www.DataShVeoeltt4aUg.ceo-mError-Amplifier Section
VVR Reference Voltage
VN Green-Mode Starting Voltage on EA_V
VG Green-Mode Ending Voltage on EA_V
fOSC=-2kHz
fOSC=1kHz
Voltage-Sense Section
VBIAS-COMV Adaptive Bias Voltage Dominated by VCOMV
Itc IC Bias Current
Current-Sense Section
tPD Propagation Delay to GATE Output
tMIN-N Minimum On Time at No-Load
VTH Threshold Voltage for Current Limit
VTL
Threshold Voltage on VS Pin Smaller than
0.5V
RVS=20k
VCOMR=1V
Min.
15
4.5
1.5
90
47
±1.5
2.475
Typ.
16
5.0
3.2
0.95
28
2.0
200
1.2
0.5
50
±2.0
3
370
13
1
2.500
2.5
0.5
1.4
10
90
950
0.8
0.25
Max.
25
17
5.5
5.0
1.20
2.5
350
50
3.0
3.0
53
±2.5
2
15
2.525
200
Units
V
V
V
mA
mA
V
V
µs
V
mA
µA
kHz
ms
Hz
kHz
%
%
V
V
V
V
µA
ns
ns
V
V
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FAN103 • Rev. 1.0.1
5
www.fairchildsemi.com


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1. Datasheet - Primary-Side-Regulation PWM Controller

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