NCP1081
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10
Table 3. OPERATING CONDITIONS
Symbol
Parameter
Min.
Typ.
Max.
Units
Conditions
CURRENT CONSUMPTION
IvportP
1
VPORTP internal current consumption
(Note 12)

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

4.7
6.5
mA
DCDC controller on
THERMAL SHUTDOWN
TSD
Thermal shutdown threshold
150


癈 Tj
Tj = junction temperature
Thyst
Thermal hysteresis

15

癈 Tj
Tj = junction temperature
THERMAL RATINGS
Ta
Ambient temperature
40

85
Tj
Junction temperature


125
150
Parametric values guaranteed
Max 1000 hours
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
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