NCP1080DER2G datasheet(9/14 Pages) ONSEMI

Part #	NCP1080DER2G

Description	Integrated PoE-PD & DC-DC Converter Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1080

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9

Table 3. Operating Conditions

Symbol

Parameter

Min.

Typ.

Max.

Units

Conditions

ERROR AMPLIFIER

Vbg_fb

Reference voltage

1.15

1.2

1.25

V

Voltage with respect to ARTN

Av_ol

DC open loop gain

−

80

−

dB

For information only

GBW

Error amplifier GBW

1

−

MHz

For information only

SOFT−START

Vss

Soft−start voltage range

−

1.15

−

V

Vss_r

Soft−start low threshold (rising edge)

0.35

0.45

0.55

V

Iss

Soft−start source current

3

5

7

mA

CURRENT LIMIT COMPARATOR

CSth

CS threshold voltage

324

360

396

mV

Tblank

Blanking time

−

100

−

nS

For information only

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 10)

−

2.5

3.5

mA

DC−DC controller off

IvportP2

VPORTP internal current consumption

(Note 11)

−

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

Parametric values guaranteed

Max 1000 hours

10.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

11. 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

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