MAX5942ACSE データシートの表示（PDF） - Maxim Integrated

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MAX5942ACSE

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.

MAX5942B

MAXIMUM DUTY CYCLE vs. VDD

48.0

47.9

47.8

VFB = 4V, CS = V-

47.7

47.6

47.5

DEVICE POWERED

47.4

FROM VDD

47.3

47.2 DEVICE POWERED

47.1 FROM V+

47.0

0

5 10 15 20 25 30 35 40

VDD (V)

VCC vs. VDD

10.2

10.1

DEVICE POWERED FROM VDD

10.0

9.9

FB = V-

9.8

9.7

9.6

9.5

0

DEVICE POWERED

FROM V+

5 10 15 20 25 30 35 40

VDD (V)

1.60

1.59

1.58

1.57

1.56

1.55

1.54

1.53

1.52

1.51

0

V+ SUPPLY CURRENT vs.

V+ VOLTAGE

VFB = VDD = V-

20 40 60 80 100

V+ VOLTAGE (V)

V+ SUPPLY CURRENT vs. V+ VOLTAGE

(AFTER STARTUP)

16

14

12

VDD = 13V, FB = V-

10

8

6

4

2

0

0 10 20 30 40 50 60 70 80 90 100 110

V+ VOLTAGE (V)

VCC VOLTAGE vs. VCC CURRENT

10.4

V+ = +67V, VFB = 4V

10.2

VDD = 36V

10.0

9.8

VDD = 13V

9.6

9.4

9.2

9.0

0

5

10

15

20

VCC CURRENT (mA)

10.0

9.9

9.8

9.7

9.6

9.5

9.4

9.3

9.2

9.1

9.0

0

VCC VOLTAGE vs. VCC CURRENT

VDD = GND, VFB = 4V

V+ = 67V

V+ = 48V

V+ = 36V

V+ = 24V

5

10

15

20

VCC CURRENT (mA)

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