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Power Controller. FAN400A Datasheet

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Power Controller. FAN400A Datasheet






FAN400A Controller. Datasheet pdf. Equivalent




FAN400A Controller. Datasheet pdf. Equivalent





Part

FAN400A

Description

Low-Power Green-Mode PWM Flyback Power Controller



Feature


FAN400A — Low-Power Green-Mode PWM Fly back Power Controller without Secondary Feedback www.DataSheet4U.com Septemb er 2008 FAN400A — Low-Power Green-Mo de PWM Flyback Power Controller without Secondary Feedback Features ƒ Linearl y Decreasing PWM Frequency ƒ Green Mod e Under Light-Load and Zero-Load Condit ions Description This highly integrate d PWM controller provide.
Manufacture

Fairchild Semiconductor

Datasheet
Download FAN400A Datasheet


Fairchild Semiconductor FAN400A

FAN400A; s several features to enhance the perfor mance of low-power flyback converters. To minimize standby power consumption, a proprietary green-mode function provi des off-time modulation to linearly dec rease the switching frequency under lig ht-load and zero-load conditions. This green mode enables the power supply to meet international power conservation r equirements. The s.


Fairchild Semiconductor FAN400A

upply voltage VDD is also used for feedb ack compensation, to regulate the outpu t voltage without requiring a conventio nal TL431 and a photo-coupler. Another advantage of the FAN400A is that the ty pical startup current is only 8μA, whi le the typical operating current can be as low as 3.6mA. A large startup resis tance can be used to achieve even highe r power conversion .


Fairchild Semiconductor FAN400A

efficiency. FAN400A integrates a frequen cy hopping function internally to reduc e EMI emissions with minimum line filte rs. Built-in synchronized slope compens ation maintains the stability of peak c urrent-mode control. Proprietary intern al compensation ensures constant output power limiting over a universal range of AC input voltages, from 90VAC to 264 VAC. The FAN400A p.

Part

FAN400A

Description

Low-Power Green-Mode PWM Flyback Power Controller



Feature


FAN400A — Low-Power Green-Mode PWM Fly back Power Controller without Secondary Feedback www.DataSheet4U.com Septemb er 2008 FAN400A — Low-Power Green-Mo de PWM Flyback Power Controller without Secondary Feedback Features ƒ Linearl y Decreasing PWM Frequency ƒ Green Mod e Under Light-Load and Zero-Load Condit ions Description This highly integrate d PWM controller provide.
Manufacture

Fairchild Semiconductor

Datasheet
Download FAN400A Datasheet




 FAN400A
www.DataSheet4U.com
September 2008
FAN400A — Low-Power Green-Mode PWM Flyback Power
Controller without Secondary Feedback
Features
ƒ Linearly Decreasing PWM Frequency
ƒ Green Mode Under Light-Load and Zero-Load
Conditions
ƒ Constant Voltage (CV) and Constant Current (CC)
ƒ No Secondary Feedback
ƒ Low Startup Current: 8μA
ƒ Low Operating Current: 3.6mA
ƒ Leading-Edge Blanking
ƒ Constant Power Limit
ƒ Universal AC Input Range
ƒ Synchronized Slope Compensation
ƒ 140°C OTP Sensor with Hysteresis
ƒ VDD Over-Voltage Clamping
ƒ Cycle-by-Cycle Current Limiting
ƒ Under-Voltage Lockout (UVLO)
ƒ Fixed PWM Frequency with Hopping
ƒ Gate Output Maximum Voltage Clamped at 17V
ƒ Small SSOT-6 Package
Applications
General-purpose, switching mode, power supplies and
flyback power converters, such as:
ƒ Battery Chargers for Cellular Phones, Cordless
Phones, PDAs, Digital Cameras, Power Tools
ƒ Power Adapters for Ink Jet Printers, Video Game
Consoles, Portable Audio Players
ƒ Open-Frame SMPS for TV/DVD Standby and
Auxiliary Supplies, Home Appliances, Consumer
Electronics
ƒ Replacement for Linear Transformers and RCC SMPS
ƒ PC 5V Standby Power
Description
This highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. To minimize standby power
consumption, a proprietary green-mode function
provides off-time modulation to linearly decrease the
switching frequency under light-load and zero-load
conditions. This green mode enables the power supply
to meet international power conservation requirements.
The supply voltage VDD is also used for feedback
compensation, to regulate the output voltage without
requiring a conventional TL431 and a photo-coupler.
Another advantage of the FAN400A is that the typical
startup current is only 8μA, while the typical operating
current can be as low as 3.6mA. A large startup
resistance can be used to achieve even higher power
conversion efficiency.
FAN400A integrates a frequency hopping function
internally to reduce EMI emissions with minimum line
filters. Built-in synchronized slope compensation
maintains the stability of peak current-mode control.
Proprietary internal compensation ensures constant
output power limiting over a universal range of AC input
voltages, from 90VAC to 264VAC.
The FAN400A provides many protection functions.
Pulse-by-pulse current limiting ensures constant output
current, even if a short circuit occurs. The internal
protection circuit disables PWM output if VDD exceeds
22.7V. The gate output is clamped at 17V to protect the
power MOS from over-voltage damage. The built-in
over-temperature protection (OTP) function shuts down
the controller at 140°C with a 30°C hysteresis.
The FAN400A is designed to provide a low-cost total
solution for flyback converters. It is available in a small-
footprint, 6-pin, SSOT-6 package.
Related Resources
ƒ AN-400A Low-Power Green-Mode PWM Flyback
Power Controller without Secondary Feedback
Ordering Information
Part Number Operating Temperature Range Package
Eco Status Packing Method
FAN400ATY
FAN400ANY
-40°C to +105°C
-40°C to +105°C
SSOT-6
DIP-8
Green
Green
Tape & Reel
Tube
For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation
FAN400A Rev. 1.0.1
www.fairchildsemi.com




 FAN400A
Application Diagram
V IN
R IN
C IN
D1
VDD
Q1
G ATE
W AUX
SENSE
GND
RS
www.DataSheet4U.com
DO
CO VO
Figure 1.
Typical Application
Internal Block Diagram
Figure 2.
Functional Block Diagram
© 2008 Fairchild Semiconductor Corporation
FAN400A Rev. 1.0.1
2
www.fairchildsemi.com




 FAN400A
Marking Information
XXX: AAT=FAN400A
TT : Die run code
. . . : Year code
- - - : Week code
www.DataSheet4U.com
1’st line
Z: Assembly plant code
X: Year code
Y: Week code
TT: Die run code
3’rd line
T: N=DIP
P: Y=Green package
M: Manufacture flow code
Figure 3.
Top Mark
Pin Configuration
SSOT-6
GND
FB
NC
GATE
VDD
SENSE
GATE
VDD
NC
SENSE
Figure 4.
Pin Configurations
DIP-8
GND
FB
NC
NC
Pin Definitions
DIP
Pin #
1
2
3
SSOT
Pin #
6
5
Name
GATE
VDD
NC
4 4 SENSE
5
63
NC
NC
72
FB
8 1 GND
Description
The totem-pole output driver to drive the power MOSFET
Power supply
No connection
Current sense senses the voltage across a sensed resistor. To provide over-
current protection, PWM output is disabled if the voltage exceeds an internal
threshold. This pin also provides current information for current-mode control.
No connection
No connection
The FB pin provides feedback information to the internal PWM comparator. This
feedback is used to control the duty cycle. When no feedback is provided, this
pin is left open.
Ground
© 2008 Fairchild Semiconductor Corporation
FAN400A Rev. 1.0.1
3
www.fairchildsemi.com






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