MAX5942BCSE(2003) データシートの表示（PDF） - Maxim Integrated

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MAX5942BCSE
(Rev.:2003)

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

Maxim Integrated 

IEEE 802.3af Power-Over-Ethernet

Interface/PWM Controller for Power Devices

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.

V+ SHUTDOWN CURRENT

vs. TEMPERATURE

182.5

CS THRESHOLD VOLTAGE

vs. TEMPERATURE

0.488

182.0

181.5

181.0

V+ = 67V, FB = SS_SHDN = V-

0.487

0.486

FB = V-

180.5

180.0

179.5

0.485

0.484

179.0

-40 -20 0 20 40 60 80

TEMPERATURE (°C)

0.483

-40 -20 0 20 40 60 80

TEMPERATURE (°C)

NDRV RESISTANCE

vs. TEMPERATURE

5.0

4.5

4.0

HIGH-SIDE DRIVER

3.5

3.0

2.5

2.0

LOW-SIDE DRIVER

1.5

1.0

-40 -20 0

20 40

60 80

TEMPERATURE (°C)

CURRENT-LIMIT DELAY

vs. TEMPERATURE

210

208

206

FB = V-, 100mV OVERDRIVE ON CS

204

202

200

198

196

194

192

190

188

-40 -20 0 20 40 60 80

TEMPERATURE (°C)

VSS_SHDN vs. VDD

2.410

2.408

2.406

2.404

2.402

2.400

0

5 10 15 20 25 30 35 40

VDD (V)

271.0

270.5

270.0

269.5

269.0

268.5

268.0

267.5

267.0

0

NDRV FREQUENCY vs. VDD

FB = V-

5 10 15 20 25 30 35 40

VDD (V)

8 _______________________________________________________________________________________

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