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PDF FAN400C Data sheet ( Hoja de datos )
| Número de pieza | FAN400C | |
| Descripción | PWM Flyback Power Controller | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FAN400C (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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www.DataSheet4U.com
September 2008
FAN400C — Low-Power, Green-Mode, PWM Flyback Power
Controller without Secondary Feedback (CC)
Features
Linearly Decreasing PWM Frequency
Green Mode Under Light-Load and Zero-Load
Conditions
Constant Current (CC) without Secondary-Feedback
Circuitry
Low Startup Current: 8μA
Low Operating Current: 3.6mA
Leading-Edge Blanking
Constant Power Limit
Universal AC Input Range
Synchronized Slope Compensation
140°C OTP Sensor with Hysteresis
VDD Over-Voltage Protection (Auto Restart)
Cycle-by-Cycle Current Limiting
Under-Voltage Lockout (UVLO)
Fixed PWM Frequency with Hopping
Gate Output Maximum Voltage Clamped at 17V
Small SSOT-6 Package
Applications
General-purpose, switching-mode, power supplies and
flyback power converters, such as:
Battery Chargers for Cellular Phones, Cordless
Phones, PDAs, Digital Cameras, Power Tools
Power Adapters for Ink Jet Printers, Video Game
Consoles, Portable Audio Players
Open-Frame SMPS for TV/DVD Standby and
Auxiliary Supplies, Home Appliances, Consumer
Electronics
Replacement for Linear Transformers and RCC SMPS
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
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
1 page  
Electrical Characteristics
www.DataSheet4U.com
Unless otherwise noted, VDD=15V and TA=25°C.
Symbol
Parameter
Conditions
VDD Section
VDD-OP Continuously Operation Voltage
VDD-ON Turn-On Threshold Voltage
VDD-OFF Turn-Off Threshold Voltage
IDD-ST Startup Current
VDD=VDD-ON – 0.1V
IDD-OP Operating Supply Current
CL=1nF
VDD-G OFF
VDD Low-threshold Voltage to Exit Green-off
Mode
VDD-OVP
tD-VDDOVP
VDD Over-Voltage Protection
VDD Over-Voltage Protection Debounce
Time
Feedback Input Section
AV Input-Voltage to Current-Sense Attenuation
ZFB Input Impedance
VFB-OPEN Open-Loop Voltage
Current-Sense Section
IFB=0.1mA to 0.2mA
tPD Propagation Delay
VSTHVA Current Limit Valley Threshold Voltage
VSTHFL Current Limit Flat Threshold Voltage
tLEB Leading-Edge Blanking Time
VDD=18V
VDD=15V
VDD=10V
VDD=18V
VDD=15V
VDD=10V
Min.
16
7.5
23.5
70
1.5/5
4.5
250
Typ. Max.
23.5
17 18
8.0 8.5
8 20
3.6 4.6
VDD-OFF+1.2
24.5 25.5
135 200
2.0/5
4.6
2.5/5
100 150
0.81
0.73
0.58
1.10
1.01
0.81
310 370
Units
V
V
V
μA
mA
V
V
μs
V/V
kΩ
V
ns
V
V
V
V
V
V
ns
© 2008 Fairchild Semiconductor Corporation
FAN400C • Rev. 1.0.1
Figure 6. Saw Limit
5
www.fairchildsemi.com
5 Page 
Applications Information
www.DataSheet4U.com
Figure 17. Reference Circuit
BOM
Reference
BD1
CY1 (Option)
C1
C2
C3
C4
C6
C7 (Option)
C8
C9
C10
D1
D2
D4
D5 (Option)
F1
L1
Component
BD DI106 1A/600V
YC 2.2nF/250V (Y1)
EC 4.7μF/400V 105°C
EC 4.7μF/400V 105°C
CC 1nF/1kV
EC 10μF/50V
CC 4.7nF/0805
CC 1nF/100V 1206
EC 470μF/10V 105°C
EC 470μF/10V 105°C
CC 2.2nF/0805
Diode FRI07
Diode FR102
Diode SB360
ZD 6.8V/0.5W
R 1Ω/0.5W
Inductor 20mH 6*8mm
Reference
L2
Q1
R1,R2
R3,R4
R5
R6
R7
R8
R10
R11
R12
R13
R14
T1
U1
U2
U3
Component
Inductor 10μH 6mm
MOSFET 1A/600V
R 750kΩ/1206
R 47kΩ/1206
R 47Ω/1206
R 4.7Ω/0.5W
R 100Ω/0805
R 10Ω/1206
R 10Ω/1206
R 100Ω/ 1/8W
R 33kΩ/0805
R 33kΩ/ 1/8W
R 4.7kΩ/0805
Transformer EE-16
IC FAN400C (Green PWM IC)
IC PC817
IC TL431
© 2008 Fairchild Semiconductor Corporation
FAN400C • Rev. 1.0.1
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet FAN400C.PDF ] | |
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