?2010 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
FL6961 " Rev. 1.0.2
5
 
Electrical Characteristics
Unless otherwise noted, V
CC
=15V and T
J
=-40癈 to 150癈. Current is defined as positive into the device and negative
out of the device.
Symbol
Parameter
Conditions
Min.    Typ.    Max.   Units
V
CC
 Section
V
CC-OP
    Continuous Operation Voltage
 
 
 
24.5
V
V
CC-ON
    Turn-On Threshold Voltage
 
11.5
12.5
13.5
V
V
CC-OFF
    Turn-Off Threshold Voltage
 
8.5
9.5
10.5
V
I
CC-ST
     Startup Current
V
CC
=V
CC-ON
  0.16V
 
10
20
I
CC-OP
     Operating Supply Current
V
CC
=12V, V
CS
=0V,
C
L
=3nF, f
SW
=60KHz
 
4.5
6
mA
V
CC-OVP
    V
DD
 Over-Voltage Protection Level 
 
26.8
27.8
28.8
V
t
D-VCCOVP
   V
DD
 Over-Voltage Protection Debounce
 
 
30
 
Error Amplifier Section
V
REF
 
Reference Voltage
 
2.475    2.500    2.525
V
Gm
Transconductance
 
 
125
 
糾ho
V
INVH
     Clamp High Feedback Voltage
 
 
2.65
2.70
V
V
INVL
     Clamp Low Feedback Voltage
 
2.25
2.30
 
V
V
OUT HIGH
   Output High Voltage
 
4.8
 
 
V
V
OZ
 
Zero Duty Cycle Output Voltage
 
1.15
1.25
1.35
V
V
INV-OVP
   Over-Voltage Protection for INV Input
 
2.70
2.75
2.80
V
V
INV-UVP
   Under-Voltage Protection for INV Input
 
0.40
0.45
0.50
V
I
COMP
 
Source Current
V
INV
=2.35V, V
COMP
=1.5V
10
20
 
V
INV
=1.5V
550
800
 
Sink Current
V
INV
=2.65V, V
COMP
=5V
10
20
 
Current-Sense Section
V
PK
 
Threshold Voltage for Peak Current Limit
Cycle-by-Cycle Limit
 
0.77
0.82
0.87
V
t
PD
 
Propagation Delay
 
 
 
200
ns
t
LEB
 
Leading-Edge Blanking Time
R
MOT
=24k&, V
COMP
=5V
 
400
500
ns
R
MOT
=24k&,
V
COMP
=V
OZ
+50mV
 
270
350
Gate Section
V
Z
-
OUT
    Output Voltage Maximum (Clamp)
V
CC
=25V
14.5
16.0
17.5
V
V
OL
 
Output Voltage Low
V
CC
=15V, I
O
=100mA
 
 
1.4
V
V
OH
 
Output Voltage High
V
CC
=14V, I
O
=100mA
8
 
 
V
t
R
 
Rising Time
V
CC
=12V, C
L
=3nF,
20~80%
 
80
 
ns
t
F
 
Falling Time
V
CC
=12V, C
L
=3nF,
80~20%
 
40
 
ns
Continued on the following page&
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