ncp1081 ON Semiconductor, ncp1081 Datasheet - Page 8

• Manufacturer Part Number: ncp1081
• Description: Integrated High Power Poe-pd Interface & Dc-dc Converter Controller
• Manufacturer: ON Semiconductor

9. The current value corresponds to the PoE−PD input current (the current flowing in the external Rdet and the quiescent current of the device
Table 3. Operating Conditions
UVLO
PASS−SWITCH AND CURRENT LIMITS
INRUSH AND ILIM1 CURRENT LIMIT TRANSITION
Vuvlo_on
Vuvlo_off
Vhyst_int
Vuvlo_pr
Vhyst_ext
Uvlo_Filter
Ron
I_Rinrush1
I_Rinrush2
I_Rilim1
I_Rilim2
I_Rilim3
I_Rilim4
Vds_pgood
Vds_pgood_hyst
are included).
Symbol
Default turn on voltage (VportP rising)
Default turn off voltage (VportP falling)
UVLO internal hysteresis
UVLO external programming range
UVLO external hysteresis
UVLO on/off filter time
Pass−switch Rds−on
Rinrush = 150 kW (Note 9)
Rinrush = 57.6 kW (Note 9)
Rilim1 = 84.5 kW (Note 9)
Rilim1 = 66.5 kW (Note 9)
Rilim1 = 55.6 kW (Note 9)
Rilim1 = 38.3 kW (Note 9)
VDS required for power good status
VDS hysteresis required for power
good status
Parameter
http://onsemi.com
Min.
29.5
260
450
600
720
970
0.8
25
95
−
−
−
−
−
−
8
1100
Typ.
125
310
510
645
770
0.6
8.2
38
32
15
90
6
−
1
Max.
1230
155
360
570
690
820
1.2
1.2
40
50
−
−
−
−
−
Units
ohm
mA
mA
mA
mA
mA
mA
mS
%
V
V
V
V
V
V
UVLO pin tied to
VPORTN
UVLO pin tied to
VPORTN
UVLO pin tied to
VPORTN
UVLO pin connected to the
resistor divider (R1 & R2).
For information only
UVLO pin connected to the
resistor divider (R1 & R2)
For information only
Max Ron specified at
Tj = 130°C
Measured at RTN−
VPORTN
Measured at RTN−
VPORTN
Current limit threshold
Current limit threshold
Current limit threshold
Current limit threshold
RTN−VPORTN
Voltage with respect to
VPORTN
Voltage with respect to
VPORTN
Conditions
1,2
1,2
1,2
1,2
1,2
1,2
1,2
= 3 V
= 3 V
1,2
falling;