ncp1083 ON Semiconductor, ncp1083 Datasheet - Page 10

• Manufacturer Part Number: ncp1083
• Description: Integrated High Power Poe-pd Interface & Dc-dc Converter Controller With 9v Auxiliary Supply Support
• Manufacturer: ON Semiconductor

14. Conditions
Table 3. Operating Conditions
SOFT−START
CURRENT LIMIT COMPARATOR
OSCILLATOR
CURRENT CONSUMPTION
THERMAL SHUTDOWN
THERMAL RATINGS
Vss
Vss_r
Iss
CSth
Tblank
DutyC
Frange
F_acc
IvportP
IvportP
TSD
Thyst
Ta
Tj
10.5
10.0
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
a. No current through the pass−switch
b. DC−DC controller inactive (SS shorted to RTN)
d. VPORTP = 57 V
c. No external load on VDDH and VDDL
Symbol
8.5
1
2
9.0
Figure 6. (Ivddl_load)max with Auxiliary
VPORTP−ARTN VOLTAGE DURING PWM
9.5
Soft−start voltage range
Soft−start low threshold (rising edge)
Soft−start source current
CS threshold voltage
Blanking time
Maximum duty cycle
Oscillator frequency range
Oscillator frequency accuracy
VPORTP internal current consumption
(Note 14)
VPORTP internal current consumption
(Note 15)
Thermal shutdown threshold
Thermal hysteresis
Ambient temperature
Junction temperature
10
Supply Operation
OPERATION (V)
10.5
11
Parameter
11.5
12
12.5
http://onsemi.com
13
13.5
Min.
0.35
324
100
150
−40
10
−
3
−
−
−
−
−
−
15. Conditions
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
Typ.
80%
1.15
0.45
360
100
±25
2.5
4.7
15
5
−
−
−
−
a. No current through the pass−switch
b. Oscillator frequency = 100 kHz
d. Aux winding not used
e. 2 nF on GATE, DC−DC controller enabled
c. No external load on VDDH and VDDL
8.5
f. VPORTP = 57 V
Figure 7. (Ivddh_load+Ivddl_load)max with
9.0
Max.
0.55
VPORTP−ARTN VOLTAGE DURING PWM
396
500
125
150
3.5
6.5
85
−
7
−
−
−
−
9.5
Auxiliary Supply Operation
Units
10
°C Tj
°C Tj
kHz
mV
mA
mA
nS
mA
°C
°C
°C
%
V
V
OPERATION (V)
10.5
For information only
Fixed internally
DC−DC controller off
DC−DC controller on
Tj = junction temperature
Tj = junction temperature
Parametric values guaranteed
− Max 1000 hours
11
11.5
Conditions
12
12.5
13
13.5