ncp1080 ON Semiconductor, ncp1080 Datasheet - Page 8

• Manufacturer Part Number: ncp1080
• Description: Integrated Poe-pd & Dc-dc Converter Controller
• Manufacturer: ON Semiconductor

7. The current value corresponds to the PoE−PD input current (the current flowing in the external Rdet and the quiescent current of the device
8. Power dissipation must be considered. Load on VDDH and VDDL must be limited especially if VDDH is not powered by an auxiliary winding.
9. Ivddl_load = current flowing out of the VDDL pin.
Table 3. Operating Conditions
PASS−SWITCH AND CURRENT LIMITS
INRUSH AND ILIM1 CURRENT LIMIT TRANSITION
VDDH REGULATOR
VDDL REGULATOR
GATE DRIVER
PWM COMPARATOR
Ron
I_Rinrush1
I_Rinrush2
I_Rilim1
Vds_pgood
Vds_pgood_hyst
VDDH_reg
VDDH_Off
VDDH_lim
VDDH_Por_R
VDDH_Por_F
VDDH_ovlo
VDDL_reg
VDDL_Por_R
VDDL_Por_F
Gate_Tr
Gate_Tf
VCOMP
are included).
Ivddh_load = current flowing out of the VDDH pin + current delivered to the Gate Driver (function of the frequency, VDDH voltage & MOSFET
gate capacitance).
Symbol
Pass−switch Rds−on
Rinrush = 150 kW (Note 7)
Rinrush = 57.6 kW (Note 7)
Rilim1 = 84.5 kW (Note 7)
VDS required for power good status
VDS hysteresis required for power good
status
Regulator output voltage (Notes 8 and 9)
Ivddh_load + Ivddl_load < 10 mA
with
0 < Ivddl_load < 2.25 mA
Regulator turn−off voltage
VDDH regulator current limit
(Notes 8 and 9)
VDDH POR level (rising)
VDDH POR level (falling)
VDDH over−voltage level (rising)
Regulator output voltage (Notes 8 and 9)
0 < lvddl_load < 2.25 mA
with
lvddh_load + Ivddl_load < 10 mA
VDDL POR level (rising)
VDDL POR level (falling)
GATE rise time (10−90%)
GATE fall time (90−10%)
COMP control voltage range
Parameter
http://onsemi.com
VDDL
8
– 0.2
Min.
3.05
260
450
0.8
8.4
7.3
2.5
1.3
95
13
16
−
−
−
6
−
−
VDDH_reg
+ 0.5 V
Typ.
125
310
510
0.6
8.2
3.3
1
9
−
−
−
−
−
−
−
−
−
– 0.02
VDDL
Max.
18.5
3.55
155
360
570
1.2
1.2
9.6
8.3
2.9
26
50
50
−
−
7
3
Units
ohm
mA
mA
mA
mA
ns
ns
V
V
V
V
V
V
V
V
V
V
V
Max Ron specified at
Tj = 130°C
Measured at RTN−
VPORTN
Measured at RTN−
VPORTN
Current limit threshold
RTN−VPORTN
falling; voltage with re-
spect to VPORTN
Voltage with respect to
VPORTN
For information only
Cload = 2 nF,
VDDHreg = 9 V
Cload = 2 nF,
VDDHreg = 9 V
For information only
Conditions
1,2
1,2
1,2
= 3 V
= 3 V
1,2
1,2