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NCP1082
http://onsemi.com
10
Table 3. OPERATING CONDITIONS
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
OSCILLATOR
DutyC
Maximum duty cycle
Fixed internally

80%

Frange
Oscillator frequency range
100

500
kHz
F_acc
Oscillator frequency accuracy
?5
%
CURRENT CONSUMPTION
IvportP
1
VPORTP internal current consumption
(Note 12)
DCDC controller off

2.5
3.5
mA
IvportP
2
VPORTP internal current consumption
(Note 13)
DCDC controller on

4.7
6.5
mA
THERMAL SHUTDOWN
TSD
Thermal shutdown threshold
T
J
 = junction temperature
150


癈 T
J
Thyst
Thermal hysteresis
T
J
 = junction temperature

15

癈 T
J
THERMAL RATINGS
Ta
Ambient temperature
40

85
癈
Tj
Junction temperature
Parametric values guaranteed
Max 1000 hours


125
150
癈
癈
12.Conditions
a. No current through the passswitch
b. DCDC controller inactive (SS shorted to RTN)
c. No external load on VDDH and VDDL
d. VPORTP = 57 V
13.Conditions
a. No current through the passswitch
b. Oscillator frequency = 100 kHz
c. No external load on VDDH and VDDL
d. Aux winding not used
e. 2 nF on GATE, DCDC controller enabled
f. VPORTP = 57 V
Figure 6. (Ivddl_load)max with Auxiliary
Supply Operation
Figure 7. (Ivddh_load+Ivddl_load)max with
Auxiliary Supply Operation
VPORTPARTN VOLTAGE DURING PWM OPERA-
TION (V)
VPORTPARTN VOLTAGE DURING PWM OPERA-
TION (V)
13
12
11.5
11
10.5
10
9.0
8.5
4.0
4.5
5.0
6.5
7.5
8.5
9.5
10.5
0.50
0.75
1.00
1.25
1.75
2.00
2.25
2.50
9.5
12.5
13.5
5.5
6.0
7.0
8.0
9.0
10.0
13
12
11.5
11
10.5
10
9.0
8.5
9.5
12.5
13.5
1.50
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