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

ABSOLUTE MAXIMUM RATINGS

(All voltages are referenced to VEE, unless otherwise noted.)

GND........................................................................-0.3V to +80V

OUT, PGOOD ...........................................-0.3V to (GND + 0.3V)

RCL, GATE .............................................................-0.3V to +12V

UVLO ........................................................................-0.3V to +8V

PGOOD to OUT.........................................-0.3V to (GND + 0.3V)

V+ to V-...................................................................-0.3V to +80V

VDD to V-.................................................................-0.3V to +40V

VCC to V-..............................................................-0.3V to +12.5V

FB, NDRV, SS_SHDN, CS to V- ..................-0.3V to (VCC + 0.3V)

Maximum Input/Output Current (continuous)

OUT to VEE ...................................................................500mA

GND, RCL to VEE ............................................................70mA

UVLO, PGOOD, PGOOD to VEE .....................................20mA

GATE to VEE....................................................................80mA

VDD, VCC.........................................................................20mA

NDRV Continuous ...........................................................25mA

NDRV (pulsed for less than 1µs) .......................................±1A

Continuous Power Dissipation (TA = +70°C)

16-Pin SO (derate 9.1mW/°C above +70°C)................727mW

Operating Temperature Ranges

MAX5942_CSE...................................................0°C to +70°C

MAX5942_ESE ................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature ......................................................+150°C

Lead Temperature (soldering, 10s) ................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VIN = (GND - VEE) = 48V, GATE = PGOOD = PGOOD = OPEN, V- tied to OUT, V+ tied to GND, UVLO = VEE, TA = TMIN to TMAX,

unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to VEE, unless otherwise noted.) (Note 1)

PARAMETER

PD INTERFACE

DETECTION MODE

Input Offset Current

Effective Differential Input

Resistance

SYMBOL

CONDITIONS

IOFFSET

dR

VIN = 1.4V to 10.1V (Note 2)

VIN = 1.4V up to 10.1V with 1V step,

OUT = PGOOD = GND (Note 3)

MIN TYP MAX UNITS

10

µA

550

kΩ

CLASSIFICATION MODE

Classification Current Turn-Off

Threshold

Classification Current

POWER MODE

Operating Supply Voltage

Operating Supply Current

Default Power Turn-On Voltage

VTH,CLSS VIN rising (Note 4)

ICLASS

VIN = 12.6V

to 20V, RDISC

= 25.5kΩ

(Notes 5, 6)

Class 0, RCL = 10kΩ

Class 1, RCL = 732Ω

Class 2, RCL = 392Ω

Class 3, RCL = 255Ω

Class 4, RCL = 178Ω

VIN

IIN

VUVLO,ON

VIN = (GND - VEE)

Measure at GND, not including RDISC

VIN increasing, UVLO = VEE

20.8 21.8 22.5

V

0

9.17

17.29

26.45

36.6

2

11.83

19.71 mA

29.55

41.4

67

V

0.4

1

mA

37.4 38.6 40.1

V

Default Power Turn-Off Voltage

VUVLO,OFF VIN decreasing, UVLO = VEE

30

V

Default Power Turn-On/Off

Hysteresis

External UVLO Programming

Range

UVLO External Reference Voltage

UVLO External Reference

Voltage Hysteresis

VHYST,UVLO

VIN,EX Set UVLO externally (Note 7)

VREF,UVLO VUVLO increasing

HYST Ratio to VREF,UVLO

7.4

V

12

67

V

2.400 2.460 2.522

V

19.2

20

20.9

%

2 _______________________________________________________________________________________

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