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Power Controller. FAN400C Datasheet

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Power Controller. FAN400C Datasheet






FAN400C Controller. Datasheet pdf. Equivalent




FAN400C Controller. Datasheet pdf. Equivalent





Part

FAN400C

Description

PWM Flyback Power Controller

Manufacture

Fairchild Semiconductor

Datasheet
Download FAN400C Datasheet


Fairchild Semiconductor FAN400C

FAN400C; FAN400C — Low-Power, Green-Mode, PWM F lyback Power Controller without Seconda ry Feedback (CC) www.DataSheet4U.com September 2008 FAN400C — Low-Power, Green-Mode, PWM Flyback Power Controlle r without Secondary Feedback (CC) Featu res ƒ Linearly Decreasing PWM Frequenc y ƒ Green Mode Under Light-Load and Ze ro-Load Conditions Circuitry Descripti on This highly integrate.


Fairchild Semiconductor FAN400C

d PWM controller provides several featur es to enhance the performance of low-po wer flyback converters. To minimize sta ndby power consumption, a proprietary g reen-mode function provides off-time mo dulation to linearly decrease the switc hing frequency under light-load and zer o-load conditions. This green mode enab les the power supply to meet internatio nal power conserva.


Fairchild Semiconductor FAN400C

tion requirements. Another advantage of the FAN400C is that the typical startup current is only 8μA, while the typica l operating current can be as low as 3. 6mA. A large startup resistance can be used to achieve higher power conversion efficiency. FAN400C integrates a frequ ency-hopping function internally to red uce EMI emissions with minimum line fil ters. Built-in sync.



Part

FAN400C

Description

PWM Flyback Power Controller

Manufacture

Fairchild Semiconductor

Datasheet
Download FAN400C Datasheet




 FAN400C
www.DataSheet4U.com
September 2008
FAN400C — Low-Power, Green-Mode, PWM Flyback Power
Controller without Secondary Feedback (CC)
Features
ƒ Linearly Decreasing PWM Frequency
ƒ Green Mode Under Light-Load and Zero-Load
Conditions
ƒ Constant Current (CC) without Secondary-Feedback
Circuitry
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 Protection (Auto Restart)
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
Ordering Information
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.
Another advantage of the FAN400C 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 higher power
conversion efficiency.
FAN400C 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 FAN400C 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
24.5V. 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 FAN400C 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-6072 — Low-Power, Green-Mode, PWM Flyback
Power Controller without Secondary Feedback
Part Number Operating Temperature Range Package
Eco Status Packing Method
FAN400CTY
FAN400CNY
-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
FAN400C • Rev. 1.0.1
www.fairchildsemi.com





 FAN400C
Application Diagram
www.DataSheet4U.com
Figure 1. Typical Application
Internal Block Diagram
Figure 2. Functional Block Diagram
© 2008 Fairchild Semiconductor Corporation
FAN400C • Rev. 1.0.1
2
www.fairchildsemi.com





 FAN400C
Marking Information
XXX: AAU=FAN400C
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: Z=Lead free + RoHS compatible
Y=Green package
M: Manufacture flow code
Figure 3. Top Mark
Pin Configurations
GND
FB
NC
GATE
VDD
SENSE
Figure 4. SSOT-6 Pin Configuration
GATE
VDD
NC
SENSE
Figure 5.
GND
FB
NC
NC
DIP-8 Pin Configuration
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 detects 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.
Ground
© 2008 Fairchild Semiconductor Corporation
FAN400C • Rev. 1.0.1
3
www.fairchildsemi.com



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