DataSheet.es    


PDF FAN6747LMY Data sheet ( Hoja de datos )

Número de pieza FAN6747LMY
Descripción Highly Integrated Green-Mode PWM Controller
Fabricantes Fairchild Semiconductor　
Logotipo Fairchild Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de FAN6747LMY (archivo pdf) en la parte inferior de esta página.


Total 15 Páginas

No Preview Available ! FAN6747LMY Hoja de datos, Descripción, Manual

September 2010
FAN6747
Highly Integrated Green-Mode PWM Controller
Features
ƒ High-Voltage Startup
ƒ AC-Line Brownout Protection by HV Pin
ƒ Constant Output Power Limit by HV Pin
(Full AC-Line Range)
ƒ Built-in 8ms Soft-Start Function
ƒ Two-Level Over-Current Protection (OCP) with
220ms Debounce
ƒ Short-Circuit Protection (SCP) with 15ms Debounce
as Output Short
ƒ Peak-Current Mode Operation with Cycle-by-Cycle
Current Limiting
ƒ Low Startup Current: 30µA
ƒ Low Operating Current: 1.7mA
ƒ Over-Temperature Protection (OTP) with an
External Negative-Temperature-Coefficient (NTC)
Thermistor
ƒ PWM Frequency Decreasing at Green-Mode
ƒ VDD Over-Voltage Protection (OVP)
ƒ Internal Latch Circuit for OVP, OTP, SCP, and OCP
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
ƒ Power Adapters
ƒ SMPS with Peak-Current Output, such as for
Printers, Scanners, Motor Drivers
ƒ AC/DC NB Adapters
ƒ Open-Frame SMPS
Description
The highly integrated FAN6747 PWM controller
provides several features to enhance the performance
of flyback converters. To minimize standby power
consumption, a proprietary green-mode function
provides off-time modulation to decrease the switching
frequency with load condition.
Under zero-load condition, the power supply enters
burst mode and burst frequency can be low to save
more power. Green-mode function enables the power
supply to meet international power conservation
requirements.
The FAN6747 is especially designed for SMPS with
peak-current output. It incorporates a cycle-by-cycle
current limiting and two-level Over-Current-Protection
(OCP) that can handle peak load with a debounce time.
Once the current is over the threshold level, it triggers
the first counter 15ms and checks if VDD is below 10V; if
it is, the PWM latches off for SCP. If VDD is higher than
10V; it keeps counting to 220ms, then the PWM latches
off for OCP.
FAN6747 also integrates a frequency-hopping function
internally to help reduce EMI emission of a power
supply with minimum line filters. Built-in proprietary
internal synchronized slope compensation achieves
constant output power limit over universal AC line
range. The gate output is clamped at 14V to protect the
external MOSFET from over-voltage damage.
Other protection functions include AC-line brownout
protection with hysteresis and VDD over-voltage
protection. For over-temperature protection, an external
NTC thermistor can be applied to sense the ambient
temperature. When OCP, OVP, SCP, or OTP is
activated, an internal latch circuit latches off the
controller. The latch is reset when the VDD supply is
removed.
Ordering Information
Part Number
FAN6747LMY
Operating
Temperature Range
-40 to +105°C
Package
8-Lead, Small-Outline Integrated Circuit (SOIC),
JEDEC MS-012, .15-Inch Narrow Body
Packing
Method
Tape & Reel
© 2010 Fairchild Semiconductor Corporation
FAN6747 • Rev. 1.0.3
www.fairchildsemi.com

1 page




FAN6747LMY pdf
Electrical Characteristics
VDD=15V and TA=25°C, unless otherwise specified.
Symbol
Parameter
Conditions
VDD Section
VOP
VDD-ON
VDD-OFF
VDD-OLP
VDD-LH
VDD-AC
Continuously Operating Voltage
Turn-On Threshold Voltage
PWM Turn-Off Threshold Voltage
Threshold Voltage on VDD for HV
JFET Turn-On in Protection
Condition
After Trigger OCP/
SCP/ OVP/ OTP
Threshold Voltage on VDD Pin
for Latch-Off Release Voltage
Threshold Voltage on VDD Pin
for Disable AC Recovery to Avoid
Startup Failed
VDD-SCP
Threshold Voltage on VDD Pin
for Short-Circuit Protection (SCP)
VFB > VFBO
ILH
Holding Current Under Latch-Off
Conduction
VDD=5V
IDD-ST
IDD-OLP
IDD-OP1
IDD-OP2
VDD-OVP
Startup Current
Holding Current at PWM-Off
Phase
Operating Supply Current when
PWM Operating
Operating Supply Current when
PWM Stop
Threshold Voltage on VDD Pin
for VDD Over-Voltage Protection
(Latch-Off)
VDD-ON – 0.16V
VDD-OLP+0.1V
VDD=20V, VFB=3V
Gate Open
VDD=20V, VFB=3V
Gate Open
tD-OVP
VDD OVP Debounce Time
VFB > VFB-N
Min. Typ. Max.
24
15.5 16.5 17.5
8 9 10
5.5 6.5 7.5
3.5 4.0 4.5
VDD-OFF
+2.5
VDD-OFF
+0.5
80
210
VDD-OFF
+3.0
VDD-OFF
+1.0
100
270
VDD-OFF
+3.5
VDD-OFF
+1.5
120
30
330
1.7 2.0
1.2 1.5
24 25 26
75 160 245
Units
V
V
V
V
V
V
V
μA
μA
μA
mA
mA
V
μs
Figure 5. UVLO Specification
© 2010 Fairchild Semiconductor Corporation
FAN6747 • Rev. 1.0.3
5
Continued on following pages…
www.fairchildsemi.com

5 Page





FAN6747LMY arduino
Typical Performance Characteristics
6
5.5
5
4.5
4
3.5
3
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 20. FB Open-Loop Trigger Level (VFB-OLP)
vs. Temperature
27
26
25
24
23
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 22. VDD Over-Voltage Protection (VDD-OVP)
vs. Temperature
1.2
300
285
270
255
240
225
210
195
180
165
150
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 21. Debounce Time of FB Pin Open-Loop
Protection (tD-OLP) vs. Temperature
120
115
110
105
100
95
90
85
80
75
70
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 23. Output Current from RT Pin (IRT)
vs. Temperature
0.9
1.1 0.8
1 0.7
0.9 0.6
0.8
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 24. Over-Temperature Protection Threshold
Voltage (VOTP) vs. Temperature
124
122
120
118
116
114
112
110
108
106
104
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 26. Brown-In (VIN-ON) vs. Temperature
0.5
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 25. Over-Temperature Protection Threshold
Voltage (VOTP2) vs. Temperature
120
118
116
114
112
110
108
106
104
102
100
98
96
94
92
90
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (℃ )
Figure 27. Brownout (VIN-OFF) vs. Temperature
© 2010 Fairchild Semiconductor Corporation
FAN6747 • Rev. 1.0.3
11
www.fairchildsemi.com

11 Page







PáginasTotal 15 Páginas
PDF Descargar[ Datasheet FAN6747LMY.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
FAN6747LMYHighly Integrated Green-Mode PWM ControllerFairchild Semiconductor
Fairchild Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

 Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

 Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar