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PDF ( 数据手册 , 数据表 ) FAN301

零件编号 FAN301
描述 PWM Controller
制造商 Fairchild Semiconductor
LOGO Fairchild Semiconductor LOGO 


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FAN301 数据手册, 描述, 功能
July 2010
FAN301
PWM Controller for Low Standby Power Charger
Applications
Features
ƒ Ultra-Low Standby Power Under 20mW at 264VAC
ƒ Constant-Current (CC) Control without Secondary-
Feedback Circuitry
ƒ Green Mode: PWM Frequency Linearly Decreasing
ƒ Fixed PWM Frequency at 45kHz with Frequency
Hopping to Solve EMI Problems
ƒ High-Voltage Startup
ƒ Low Operating Current: 3mA
ƒ Peak-Current-Mode Control in CV Mode
ƒ Cycle-by-Cycle Current Limiting
ƒ VDD Over-Voltage Protection (Auto-Restart)
ƒ VDD Under-Voltage Lockout (UVLO)
ƒ Gate Output Maximum Voltage Clamped at 15V
ƒ Fixed Over-Temperature Protection (Auto-Restart)
Applications
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, FAN301,
provides 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 is
the result, compared to a conventional design or a
linear transformer.
To minimize standby power consumption, a 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 power conservation requirements.
By using FAN301, a charger can be implemented with
fewer external components and minimized cost. A
typical output CV/CC characteristic envelope is shown
in Figure 1.
Vo Maximum
Typical
Minimum
Io
Figure 1. Typical Output V-I Characteristic
(without Cable)
Ordering Information
Part Number
FAN301MY
Operating
Temperature Range
-40°C to +105°C
Package
8-Lead, Small Outline Package
Packing Method
Tape & Reel
© 2008 Fairchild Semiconductor Corporation
FAN301 • Rev. 1.0.0
www.fairchildsemi.com







FAN301 pdf, 数据表
Typical Performance Characteristics (Continued)
Figure 12. Minimum Frequency if CCM (fOSC-CM-MIN)
vs. Temperature
Figure 13. Maximum Duty Cycle (DCYMAX)
vs. Temperature
Figure 14. Supply Current Drawn from HV Pin (IHV)
vs. Temperature
Figure 15. Variation Test Voltage on CS Pin for
Constant Current Output (VCCR)
vs. Temperature
Figure 16. Green-Mode Entry Voltage (VFB-N)
vs. Temperature
Figure 17. Green-Mode Exit Voltage (VFB-G)
vs. Temperature
© 2008 Fairchild Semiconductor Corporation
FAN301 • Rev. 1.0.0
8
www.fairchildsemi.com







FAN301 equivalent, schematic
© 2008 Fairchild Semiconductor Corporation
FAN301 • Rev. 1.0.0
16
www.fairchildsemi.com










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