FAN7631 Fairchild Semiconductor, FAN7631 Datasheet - Page 5

• Manufacturer Part Number: FAN7631
• Description: The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FAN7631 • 1.0.2
Electrical Characteristics
T
Supply Section
UVLO Section
Oscillator & Feedback Section
Soft-Start and Restart Section
HV
LV
A
HV
LV
V
Symbol
HV
LV
=25C and LV
V
V
I
I
I
I
f
SS_START
Q
O
Q
O
OSC_SS
CC,START
V
CC,START
SS_END
RT-CON
CC,STOP
f
HV
HV
CC,STOP
V
V
I
I
V
DC
LV
LV
CC,HYS
OSC
I
CC,HYS
SS1
SS2
SSC
LK
BH
BL
RT
CC
CC
CC
CC
Offset Supply Leakage Current
Quiescent HV
Quiescent LV
Operating HV
(RMS Value)
Operating LV
(RMS Value)
LV
LV
LV
HV
HV
HV
Pulse Skip Disable Threshold Voltage
Pulse Skip Enable Threshold Voltage
Regulated RT Voltage
Output Oscillation Frequency
Output Duty Cycle
Soft-Start Current 1
Soft-Start Current 2
Soft-Start Start Voltage
Soft-Start End Voltage
Clamped Soft-Start Voltage
Initial Output Oscillation Frequency
During Soft-Start
RT-CON Voltage for Startup
CC
CC
CC
CC
CC
CC
CC
=17V unless otherwise specified.
UVLO Turn-On Threshold
UVLO Turn-Off Threshold
UVLO Hysteresis
UVLO Turn-Off Threshold
UVLO Turn-On Threshold
UVLO Hysteresis
(3)
(3)
CC
CC
Parameter
CC
CC
Supply Current
Supply Current
Supply Current
Supply Current
HV
HV
LV
f
V
f
V
f
V
f
V
f
V
f
V
R
R
R
R
V
V
C
C
C
R
R
R
OSC
OSC
OSC
OSC
OSC
OSC
CON
CON
CTR
CON
CON
CTR
CSS
CSS
T
T
T
T
SS
SS
SS
T
T
T
=11.6kΩ, C
=2.7kΩ, C
=11.6kΩ, C
=2.7kΩ, C
=11.6kΩV
=5.8kΩ
=2.7kΩ
CC
5
CC
CC,START
=1nF, V
=1nF, V
=1nF, V
=100kHz, C
=300kHz, C
=300kHz, V
=100kHz, C
=300kHz, C
=300kHz, V
=0V (No Switching)
=0V (No Switching)
=0V, LV
=1.6V, LV
,
=V
> 0.6V, V
> 0.6V, V
> 0.6V, V
> 0.6V, V
START
CTR
Condition
- 0.1V, V
- 0.1V, V
CON
CON
CON
CC
SS
Load
CSS
Load
SS
CC
=17V
=1nF
=3V
=3V
=3V
CTR
CTR
CTR
CTR
CON
CON
Load
Load
Load
Load
=1nF
=100pF
=17V
=1.6V
=100pF
=0V
=0V
=0V
=0V
=1nF,
=1nF,
=1nF
=1nF,
CTR
< 0.4V,
< 0.4V,
CTR
=0V
=0V
Continued on the following page…
Min.
11.2
0.54
0.36
4.75
188
600
8.9
8.2
7.8
1.5
1.5
4.0
48
49
48
25
3
Typ.
12.5
10.0
0.60
0.40
5.00
100
100
200
300
530
3.0
2.6
2.5
9.2
8.7
0.5
2.0
1.6
4.2
10
50
50
50
30
60
50
8
5
Max.
13.8
11.1
10.2
0.66
0.44
5.25
www.fairchildsemi.com
120
200
200
212
120
4.5
3.5
9.6
2.5
1.7
4.4
50
10
14
52
51
52
35
7
Unit
kHz
kHz
mA
mA
mA
mA
mA
mA
mV
μA
μA
μA
μA
μA
%
V
V
V
V
V
V
V
V
V
V
V
V