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MAX5953A Datasheet(PDF) 2 Page - Maxim Integrated Products

Part No. MAX5953A
Description  IEEE 802.3af PD Interface and PWM Controllers with Integrated Power MOSFETs
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX5953A Datasheet(HTML) 2 Page - Maxim Integrated Products

 
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IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN = (V+ - VEE) = 48V, GATE = PGOOD = PGOOD = unconnected, GND = OUT, HVIN = V+, UVLO = VEE, TJ = 0°C to +125°C, unless
otherwise noted. Typical values are at TJ = +25°C. All voltages are referenced to VEE, unless otherwise noted.) (Note 1)
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.
V+ to VEE ................................................................-0.3V to +90V
OUT, PGOOD, PGOOD to VEE.....................-0.3V to (V+ + 0.3V)
RCLASS, GATE to VEE ...........................................-0.3V to +12V
UVLO to VEE ............................................................ -0.3V to +8V
PGOOD to OUT ........................................... -0.3V to (V+ + 0.3V)
HVIN, INBIAS, DRNH, XFRMRH,
XFRMRL to GND.................................................-0.3V to +80V
BST to GND ........................................................... -0.3V to +95V
BST to XFRMRH .................................................... -0.3V to +12V
PGND to GND .......................................................-0.3V to +0.3V
DCUVLO, RAMP, CSS, OPTO, FLTINT, RCFF,
RTCT to GND..................................................... -0.3V to +12V
SRC, CS to GND...................................................... -0.3V to +6V
REGOUT, DRVIN to GND .......................................-0.3V to +12V
REGOUT to HVIN .................................................. -80V to +0.3V
REGOUT to INBIAS ............................................... -80V to +0.3V
PPWM to GND....................................-0.3V to (VREGOUT + 0.3V)
Maximum Input/Output Current (Continuous)
OUT to VEE....................................................................500mA
V+, RCLASS to VEE.........................................................70mA
UVLO, PGOOD, PGOOD to VEE .....................................20mA
GATE to VEE....................................................................80mA
REGOUT to GND ............................................................50mA
DRNH, XFRMRH, XFRMRL, SRC to GND (Average),
TJ = +125°C..................................................................0.9A
PPWM to GND ..............................................................±20mA
Continuous Power Dissipation* (TA = +70°C)
48-Pin TQFN 7mm X 7mm
(derate 27.8mW/°C above +70°C) .............................2222mW
θJA ................................................................................36°C/W
Operating Ambient Temperature Range ................0°C to +85°C
Operating Junction Temperature Range ..............0°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWERED DEVICE (PD) INTERFACE
DETECTION MODE
Input Offset Current
IOFFSET
VIN = 1.4V to 10.1V (Note 2)
10
µA
Effective Differential Input
Resistance (Note 3)
dR
VIN = 1.4V, up to 10.1V with 1V step
550
k
CLASSIFICATION MODE
Classification Current Turn-Off
Threshold
VTH,CLASS
VIN rising (Note 4)
20.8
21.8
22.5
V
Class 0, RRCLASS = 10k
02
Class 1, RRCLASS = 732
9.17
11.83
Class 2, RRCLASS = 392
17.29
19.71
Class 3, RRCLASS = 255
26.45
29.55
Classification Current
ICLASS
VIN = 12.6V
to 20V,
RDISC =
25.5k
(Notes 5, 6)
Class 4, RRCLASS = 178
36.6
41.4
mA
POWER MODE
Operating Supply Voltage
VIN
VIN = (V+ - VEE)67
V
Operating Supply Current
IIN
Measure at V+, not including RDISC,
GATE = VEE, HVIN = GND = OUT
0.4
1
mA
MAX5953A/MAX5953C
37.4
38.6
40.2
Default Power Turn-On Voltage
VUVLO, ON
VIN
increasing
MAX5953B/MAX5953D
34.3
35.4
36.9
V
Default Power Turn-Off Voltage
VUVLO,OFF
VIN decreasing, MAX5953A/MAX5953C
30
V
*As per JEDEC 51 standard.


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