Rainbow-electronics MAX5965B Manual de usuario descargar pdf (Pagina 2)

MAX5965A/MAX5965B

High-Power, Quad, Monolithic, PSE Controllers

for Power over Ethernet

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

AGND

= 32V to 60V, V

= 0V, V

to V

DGND

= +3.3V, all voltages are referenced to V

, unless otherwise noted. Typical values are at

AGND

= +48V, V

DGND

= +48V, V

= (V

DGND

+ 3.3V), T

= +25°C. Currents are positive when entering the pin and negative other-

wise.) (Note 2)

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.

(Voltages referenced to V

, unless otherwise noted.)

AGND, DGND, DET_, V

, RESET, A3–A0, SHD_, OSC,

SCL, SDAIN, AUTO .............................................-0.3V to +80V

OUT_........................................................-12V to (AGND + 0.3V)

GATE_ (internally clamped) (Note 1) ..................-0.3V to +11.4V

SENSE_ ..................................................................-0.3V to +24V

, RESET, MIDSPAN, A3–A0, SHD_, OSC, SCL,

SDAIN and AUTO to DGND ..................................-0.3V to +7V

INT and SDAOUT to DGND....................................-0.3V to +12V

Maximum Current into INT, SDAOUT, DET_ .......................80mA

Maximum Power Dissipation (T

= +70°C)

36-Pin SSOP (derate 17.4mW/°C above +70°C) .....1388.9mW

Operating Temperature Ranges:

MAX5965A/MAX5965B_EAX ...…………………-40°C to +85°C

MAX5965A/MAX5965B_UAX ...............................0°C to +85°C

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

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

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

Note 1: GATE_ is internally clamped to 11.4V above V

. Driving GATE_ higher than 11.4V above V

may damage the device.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLIES

AGND

- V

32 60

DGND

060

to V

DGND

, V

DGND

= V

AGND

2.4 3.6

Operating Voltage Range

to V

DGND

, V

DGND

= V

3.0 3.6

OUT_

= V

, V

SENSE

_ = V

, DET

= AGND,

all logic inputs open, SCL = SDAIN = V

INT and SDAOUT unconnected. Measured at

AGND in power mode after GATE_ pullup

4.8 6.8

Supply Currents

DIG

All logic inputs high, measured at V

0.2 0.4

GATE DRIVER AND CLAMPING

GATE_ Pullup Current I

Power mode, gate drive on, V

GATE

= V

(Note 3)

-40 -50 -65 µA

Weak GATE_ Pulldown Current I

PDW

SHD_ = DGND, V

GATE_

= V

+ 10V 42 µA

Maximum Pulldown Current I

PDS

SENSE

= 600mV, V

GATE_

= V

+ 2V 100 mA

External Gate Drive V

GATE

- V

, power mode, gate drive on,

= 1µA

9 10 11.5 V

1 2 3 4 5 6 7 ... 51 52

MAX5965A/MAX5965B 1

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Rainbow-electronics MAX5965B Manual de usuario Pagina 2

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