FAN301 PDF даташит
Спецификация FAN301 изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «PWM Controller». |
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Детали детали
Номер произв | FAN301 |
Описание | PWM Controller |
Производители | Fairchild Semiconductor |
логотип |
16 Pages
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July 2010
FAN301
PWM Controller for Low Standby Power Charger
Applications
Features
Ultra-Low Standby Power Under 20mW at 264VAC
Constant-Current (CC) Control without Secondary-
Feedback Circuitry
Green Mode: PWM Frequency Linearly Decreasing
Fixed PWM Frequency at 45kHz with Frequency
Hopping to Solve EMI Problems
High-Voltage Startup
Low Operating Current: 3mA
Peak-Current-Mode Control in CV Mode
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection (Auto-Restart)
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection (Auto-Restart)
Applications
Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, power tools
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
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Application Diagram
Internal Block Diagram
Figure 2. Typical Application
© 2008 Fairchild Semiconductor Corporation
FAN301 • Rev. 1.0.0
Figure 3. Functional Block Diagram
2
www.fairchildsemi.com
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Marking Information
F- Fairchild Logo
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die-Run Code
T: M=SOP
P: Y= Green Package
M: Manufacture Flow Code
Figure 4. Top Mark
Pin Configuration
CS
GATE
VDD
VS
HV
NC
FB
GND
Figure 5. Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
CS
GATE
VDD
VS
GND
FB
NC
HV
Description
Current sense. Connected to a current-sense resistor for peak-current-mode control in CV
mode. The current-sense signal is also provided for output-current regulation in CC mode.
The totem-pole output driver to drive the power MOSFET.
Power supply
Feedback. The VS pin provides feedback information for output-current regulation in CC mode.
Power ground
Feedback. The FB pin provides feedback information to the internal PWM comparator. This
feedback is used to control the duty cycle.
No connection
For startup. This pin is pulled HIGH to the line input or bulk capacitor via resistors.
© 2008 Fairchild Semiconductor Corporation
FAN301 • Rev. 1.0.0
3
www.fairchildsemi.com
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Номер в каталоге | Описание | Производители |
FAN301 | PWM Controller | Fairchild Semiconductor |
FAN301MY | PWM Controller | Fairchild Semiconductor |
FAN302HLMY_F117 | PWM Controller | Fairchild Semiconductor |
FAN302UL | PWM Controller | Fairchild Semiconductor |
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