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Fairchild Semiconductor Electronic Components Datasheet

FAN103 Datasheet

Primary-Side-Regulation PWM Controller

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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
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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


Fairchild Semiconductor Electronic Components Datasheet

FAN103 Datasheet

Primary-Side-Regulation PWM Controller

No Preview Available !

Application Diagram
D1
RF
AC
Input
D2
L1
D4
C1 C2
D3
Internal Block Diagram
Rsn2
Csn
Dsn
Rsn1
DFa
CVDD
R1
CVS R2
Rsn Csn2
T1
DF
DC
CO1 CO2 Rd Output
3 VDD
7 N.C
8 HV
6 GND
VS 5
GATE 2
CS 1
COMR 4
RGATE
Rcs
CCR
MOSFET
RSENSE
Figure 2. Typical Application
www.DataSheet4U.com
© 2009 Fairchild Semiconductor Corporation
FAN103 • Rev. 1.0.1
Figure 3. Functional Block Diagram
2
www.fairchildsemi.com


Part Number FAN103
Description Primary-Side-Regulation PWM Controller
Maker Fairchild Semiconductor
Total Page 16 Pages
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