MAX5942A datasheet(6/24 Pages) MAXIM | IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices

6 page

IEEE 802.3af Power-Over-Ethernet

Interface/PWM Controller for Power Devices

_______________________________________________________________________________________

DETECTION CURRENT vs.

INPUT VOLTAGE

INPUT VOLTAGE (V)

0.10

0.20

0.30

0.40

0.05

0.15

0.25

0.35

0.45

010

RDISC = 25.5k

Ω

GND = V+ = V- = OUT

CLASSIFICATION CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

CLASS 0

CLASS 1

CLASS 2

CLASS 3

CLASS 4

EFFECTIVE DIFFERENTIAL INPUT

RESISTANCE vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

0.5

1.5

2.5

1.0

2.0

3.0

3.5

OFFSET CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

-2.0

-1.0

-3.0

-2.5

-1.5

-0.5

-3.5

111

NORMALIZED UVLO

vs. TEMPERATURE

TEMPERATURE (

°C)

-15

0.996

1.004

0.992

0.994

1.000

1.008

1.002

0.998

1.006

1.010

0.990

-40

UVLO = VEE

PGOOD OUTPUT LOW VOLTAGE

vs. CURRENT

ISINK (mA)

120

160

100

140

180

200

020

PGOOD OUTPUT LOW VOLTAGE

vs. CURRENT

ISINK (mA)

100

200

300

150

250

350

400

020

OUT LEAKAGE CURRENT

vs. TEMPERATURE

INPUT VOLTAGE (V)

-15

-40

VOUT = 67V

INRUSH CURRENT CONTROL

(VIN = 12V)

MAX5942A/B toc09

VGATE

5V/div

IINRUSH

100mA/div

VOUT

10V/div

PGOOD

10V/div

1ms/div

Typical Operating Characteristics

(VIN = (GND - VEE) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = VEE, VDD = 13V, NDRV floating, TA = TMIN to TMAX.

Typical values are at TA = +25°C. All voltages are referenced to VEE (for graphs 1–11 in the Typical Operating Characteristics); all

voltages are referenced to V- (for graphs 12–30 in the Typical Operating Characteristics), unless otherwise noted.

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