MAX5953DUTM datasheet(7/27 Pages) MAXIM

Part #	MAX5953DUTM

Description	IEEE 802.3af PD Interface and PWM Controllers with Integrated Power MOSFETs

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Manufacturer	MAXIM [Maxim Integrated Products]

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IEEE 802.3af PD Interface and PWM Controllers

with Integrated Power MOSFETs

_______________________________________________________________________________________

7

DETECTION CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

8

6

4

2

0.1

0.2

0.3

0.4

0.5

0

010

RDISC = 25.5kΩ

IIN + IRDISC

CLASSIFICATION CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

25

20

15

10

5

10

15

20

25

30

35

40

45

50

0

030

CLASS 4

CLASS 3

CLASS 2

CLASS 1

CLASS 0

EFFECTIVE DIFFERENTIAL INPUT

RESISTANCE vs. INPUT CURRENT

INPUT VOLTAGE (V)

8

6

4

2

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0

010

INPUT OFFSET CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

8

6

2

4

-3.5

-3.0

-2.5

-2.0

-1.5

-1.0

-0.5

0

-4.0

010

NORMALIZED UVLO

vs. TEMPERATURE

TEMPERATURE (°C)

100

75

50

25

0.992

0.994

0.996

0.998

1.000

1.002

1.004

1.006

1.008

1.010

0.990

0125

PGOOD OUTPUT LOW VOLTAGE

vs. CURRENT

ISINK (mA)

15

10

5

50

100

150

200

250

0

020

OUT LEAKAGE CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

100

75

50

25

1

10

100

1000

0.1

0125

VOUT = 48V

INRUSH CURRENT CONTROL

(VIN = 48V)

MAX5953A/B/C/D toc08

4ms/div

VOUT TO

VEE

50V/div

VGATE

5V/div

0V

0A

0V

IINRUSH

100mA/div

PGOOD

50V/div

DCUVLO THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

100

75

50

25

1.2750

1.2775

1.2800

1.2825

1.2725

0

125

DCUVLO RISING

Typical Operating Characteristics

(VIN = (V+ - VEE) = 48V, GATE = PGOOD = unconnected, GND connected to OUT, HVIN connected to V+, UVLO = VEE, CINBIAS = 1µF,

CREGOUT = 2.2µF, RRTCT = 25kΩ, CRTCT = 100pF, CBST = 0.22µF, TJ = 0°C to +125°C, unless otherwise noted. Typical values are

at TJ = +25°C. All voltages are referenced to VEE, unless otherwise noted.)

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