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NCP1082 Datasheet(PDF) 10 Page - ON Semiconductor

Part # NCP1082
Description  Integrated PoE-PD & DC-DC Converter Controller with 9V Auxiliary Supply Support
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1082 Datasheet(HTML) 10 Page - ON Semiconductor

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NCP1082
http://onsemi.com
10
Table 3. Operating Conditions
Symbol
Parameter
Min.
Typ.
Max.
Units
Conditions
OSCILLATOR
DutyC
Maximum duty cycle
−
80%
−
Fixed internally
Frange
Oscillator frequency range
100
−
500
kHz
F_acc
Oscillator frequency accuracy
±25
%
CURRENT CONSUMPTION
IvportP1
VPORTP internal current consumption
(Note 12)
−
2.5
3.5
mA
DC−DC controller off
IvportP2
VPORTP internal current consumption
(Note 13)
−
4.7
6.5
mA
DC−DC controller on
THERMAL SHUTDOWN
TSD
Thermal shutdown threshold
150
−
−
°C Tj
Tj = junction temperature
Thyst
Thermal hysteresis
−
15
−
°C Tj
Tj = junction temperature
THERMAL RATINGS
Ta
Ambient temperature
−40
−
85
°C
Tj
Junction temperature
−
−
125
150
°C
°C
Parametric values guaranteed
Max 1000 hours
12.Conditions
a. No current through the pass−switch
b. DC−DC 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 pass−switch
b. Oscillator frequency = 100 kHz
c. No external load on VDDH and VDDL
d. Aux winding not used
e. 2 nF on GATE, DC−DC 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
VPORTP−ARTN VOLTAGE DURING PWM
OPERATION (V)
VPORTP−ARTN VOLTAGE DURING PWM
OPERATION (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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