FAN6749 Fairchild Semiconductor, FAN6749 Datasheet - Page 5

• Manufacturer Part Number: FAN6749
• Description: The FAN6749 highly integrated PWM controller enhances the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2012 Fairchild Semiconductor Corporation
FAN6749 • Rev. 1.0.0
Electrical Characteristics
V
V
Symbol
V
t
V
V
D-VDDOVP
DD
V
V
DD
V
V
V
I
I
I
V
RESTART
t
I
DD-OP1
DD-OP2
DD-OLP
DD-OFF
DD-OLP
DD-SCP
DD-OVP
D-SCP
DD-ST
V
DD-ON
DD-LH
DD-AC
=15V and T
UVLO
I
LH
Section
OP
Continuously Operating Voltage
Threshold Voltage to Startup
Threshold Voltage to Stop
Switching in Protection Mode
Threshold Voltage to Turn On HV
Startup in Protection Mode
Threshold Voltage to Stop
Switching in Normal Mode
Threshold Voltage to Enable HV
Startup to Charge V
Mode
Threshold Voltage to Release
Latch Mode
Threshold Voltage on VDD Pin for
Disable Brown-in to Avoid Startup
Failure
Threshold Voltage on VDD Pin for
Short-Circuit Protection (SCP)
Debounce Time for SCP
Startup Current
Supply Current in PWM Operation
Supply Current when PWM Stops
Operating Current when V
OFF
Internal Sink Current
Threshold Voltage for V
Voltage Protection
V
Debounce Time
V
DD-ON
DD
in Protection Mode
A
Over-Voltage Protection
=25C unless otherwise noted.
V
DD
GATE
Parameter
Normal Mode
DD
in Normal
V
DD
UVLO
DD
Over-
<V
DD-
Figure 5. V
V
RESTART
Limited by V
V
V
V
V
V
V
V
V
& V
V
V
Open
V
V
V
DD
DD
DD
DD
DD
DD
FB
FB
DD-ON
DD
DD
DD
DD-OLP
>V
DD
=20V, V
=15V, V
> V
Rising
Falling
Falling
Falling
Falling
Falling
= 5V
< V
Conditions
FB-OLP
– 0.16V
+0.1V
FB-OLP
t
DD-SCP
5
DD
FB
FB
DD
Behavior
= 3V Gate
< 1.4V
OVP
V
V
Min.
+2.5
+1.0
28.5
DD-OFF
100
265
160
6.5
6.0
4.5
3.5
UVLO
16
10
12
V
Continued on the following page…
V
UVLO
Typ.
+1.5
29.0
DD-OFF
120
325
200
7.5
6.5
5.0
4.0
1.8
1.0
17
11
17
+3
V
V
DD-OFF
UVLO
Max.
29.9
140
385
240
8.5
7.0
5.5
4.5
2.4
1.9
25
18
12
22
30
+3.5
www.fairchildsemi.com
+2.0
Unit
mA
mA
ms
µA
µA
µA
µs
V
V
V
V
V
V
V
V
V
V