Rainbow-electronics MAX5945 Manual do Utilizador descarregar pdf (Página 7)

MAX5945

Quad Network Power Controller

for Power-Over-LAN

_______________________________________________________________________________________ 7

DIGITAL SUPPLY CURRENT

vs. INPUT VOLTAGE

MAX5945 toc04

INPUT VOLTAGE (V)

SUPPLY CURRENT (mA)

4.64.23.83.43.02.62.2

1.8 5.0

MEASURED AT V

UNDERVOLTAGE LOCKOUT

vs. TEMPERATURE

MAX5945 toc05

TEMPERATURE (°C)

UNDERVOLTAGE LOCKOUT (V)

603510-15

27.5

28.0

28.5

29.0

29.5

30.0

27.0

-40 85

GATE OVERDRIVE

vs. INPUT VOLTAGE

MAX5945 toc06

INPUT VOLTAGE (V)

GATE OVERDRIVE (V)

5752474237

9.80

9.82

9.84

9.86

9.88

9.90

9.92

9.94

9.96

9.98

9.78

32 62

GATE OVERDRIVE

vs. TEMPERATURE

MAX5945 toc07

TEMPERATURE (°C)

GATE OVERDRIVE (V)

603510-15

9.6

9.7

9.8

9.9

10.0

10.1

10.2

10.3

10.4

10.5

9.5

-40 85

SENSE TRIP VOLTAGE

vs. TEMPERATURE

MAX5945 toc08

TEMPERATURE (°C)

SENSE TRIP VOLTAGE (mV)

603510-15

175

180

185

190

195

200

170

-40 85

SENSE TRIP VOLTAGE

vs. INPUT VOLTAGE

MAX5945 toc09

INPUT VOLTAGE (V)

SENSE TRIP VOLTAGE (mV)

5752474237

182

184

186

188

190

180

32 62

FOLDBACK CURRENT-LIMIT

THRESHOLD vs. OUTPUT VOLTAGE

MAX5945 toc10

OUT

- V

(V)

SENSE

- V

(mV)

40302010

100

150

200

250

300

050

ZERO-CURRENT DETECTION

THRESHOLD vs. TEMPERATURE

MAX5945 toc11

TEMPERATURE (°C)

DETECTION THRESHOLD (mV)

603510-15

-40 85

Typical Operating Characteristics (continued)

= -48V, V

= +3.3V, AUTO = AGND = DGND = 0V, RESET = SHD_ = unconnected, R

SENSE

= 0.5Ω, all registers = default setting,

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 11 12 ... 43 44

Quad Network Power Controller 1

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