MAX5941A datasheet(8/24 Pages) MAXIM

Part #	MAX5941A

Description	IEEE 802.3af-Compliant Power-Over-Ethernet Interface/PWM Controller for Power Devices

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Manufacturer	MAXIM [Maxim Integrated Products]

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IEEE 802.3af-Compliant Power-Over-Ethernet

Interface/PWM Controller for Power Devices

8

_______________________________________________________________________________________

185

188

187

186

190

189

194

193

192

191

195

-40

-20

0

20

40

60

80

V+ SHUTDOWN CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = 67V, OPTO = SS_SHDN =

CS = V-, VDD = 13V

0.483

0.484

0.486

0.485

0.487

0.488

-40

0

-20

20

40

60

80

CS THRESHOLD VOLTAGE

vs. TEMPERATURE

TEMPERATURE (

°C)

VOPTO = 4V, V+ = 67V

NDRV RESISTANCE

vs. TEMPERATURE

1.0

1.5

2.5

2.0

4.0

4.5

3.5

3.0

5.0

-40

0

20

-20

40

60

80

TEMPERATURE (

°C)

HIGH-SIDE DRIVER

LOW-SIDE DRIVER

170

176

174

172

180

178

188

186

184

182

190

-40

-20

0

20

40

60

80

CURRENT-LIMIT DELAY

vs. TEMPERATURE

TEMPERATURE (

°C)

VOPTO = 4V, 100mV OVERDRIVE ON CS

2.400

2.402

2.406

2.404

2.408

2.410

010

15

5

2025303540

VSS_SHDN vs. VDD

VDD (V)

267.0

268.0

267.5

269.0

268.5

269.5

270.0

270.5

271.0

010

15

5

2025303540

NDRV FREQUENCY vs. VDD

VDD (V)

VOPTO = 4V, CS = V-

Typical Operating Characteristics (continued)

(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.)

4.50

4.65

4.60

4.55

4.75

4.70

4.95

4.90

4.85

4.80

5.00

-40

-20

0

20

40

60

80

SOFT-START SOURCE CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = 67V, OPTO = VCC

CS = SS_SHDN = V-

11.00

11.05

11.15

11.10

11.20

11.25

-40

0

-20

20

40

60

80

V+ INPUT CURRENT

vs. TEMPERATURE (AFTER STARTUP)

TEMPERATURE (

°C)

V+ = 67V, VOPTO = 4V,

CS = V-, VDD = 13V

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