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Fairchild Semiconductor Electronic Components Datasheet

FAN102 Datasheet

Primary-Side-Control PWM Controller

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FAN102 pdf
August 2008
FAN102
Primary-Side-Control PWM Controller
Features
ƒ Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
ƒ Green Mode: PWM Frequency Linearly Decreasing
ƒ Fixed PWM Frequency at 42kHz with Frequency
Hopping to Solve EMI Problem
ƒ Cable Compensation in CV Mode
ƒ Low Startup Current: 10μA
ƒ Low Operating Current: 3.5mA
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 18V
ƒ Fixed Over-temperature Protection with Latch
ƒ SOP-8 Package Available
www.DataShAeept4pUl.iccomations
ƒ Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, power tools
ƒ Replaces linear transformer and RCC SMPS
Description
This highly integrated PWM controller, FAN102,
provides several features to enhance the performance
of low-power flyback converters. The proprietary
topology enables simplified circuit design for battery
charger applications. A low-cost, smaller and lighter
charger results when compared to a conventional
design or a linear transformer. The startup current is
only 10µA, which allows use of large startup resistance
for further power saving.
To minimize the standby power consumption, the
proprietary green-mode function provides off-time
modulation to linearly decrease PWM frequency under
light-load conditions. This green-mode function assists
the power supply in meeting the power conservation
requirements.
Using FAN102, a charger can be implemented with
fewer external components and minimized cost. A
typical output CV/CC characteristic envelope is shown
in Figure 1.
FAN102 controller is available in 8-pin SOP package.
Figure 1. Typical Output V-I Characteristic
Ordering Information
Part Number
Operating
Temperature Range
FAN102MY
-40°C to +105°C
Eco Status
Green
Package
8-Lead, Small Outline
Package (SOP-8)
Packing Method
Tape & Reel
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation
FAN102 Rev. 1.0.1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FAN102 Datasheet

Primary-Side-Control PWM Controller

No Preview Available !

FAN102 pdf
Application Diagram
Internal Block Diagram
Figure 2. Typical Application
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VDD
VIsPaKh
Vsah
© 2008 Fairchild Semiconductor Corporation
FAN102 Rev. 1.0.1
Figure 3. Functional Block Diagram
2
Brownout
Protection
www.fairchildsemi.com


Part Number FAN102
Description Primary-Side-Control PWM Controller
Maker Fairchild Semiconductor
Total Page 14 Pages
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