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| 型号： | MAX5965BUAX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/54页 |
| 文件大小： | 1334K |
| 描述： | IC PSE CTRLR FOR POE 36SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | 以太网供电控制器（PoE） |
| 应用： | IP 电话，LAN 网络供电，网络路由器和交换机 |
| 内部开关： | 无 |
| 电源电压： | 2.4 V ~ 3.6 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 带卷 (TR) |
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High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
14 ______________________________________________________________________________________
Pin Description (continued)
PIN
NAME
FUNCTION
6
SDAIN
Serial Interface Input Data Line. Connect the data line optocoupler output to SDAIN (see the Typical
Operating Circuits). Connect SDAIN to SDAOUT if using a 2-wire, I
2
C-compatible system.
710
A3A0
Address Bits. A3A0 form the lower part of the devices address. Address inputs default high with an
internal 50k& pullup resistor to V
DD
. The address values latch when V
DD
or V
EE
ramps up and exceeds
its UVLO threshold or after a reset. The 3 MSBs of the address are set to 010.
1114
DET1DET4
Detection/Classification Voltage Outputs. Use DET1 to set the detection and classification probe voltages
on port 1. Use DET1 for the AC voltage sensing of port 1 when using the AC disconnect scheme (see the
Typical Operating Circuits).
15
DGND
Digital Ground. Connect to digital ground.
16
V
DD
Positive Digital Supply. Connect to a digital power supply (reference to DGND).
17 20 SHD1SHD4
Port Shutdown Inputs. Pull SHD_ low to turn off the external FET on port_. Internally pulled up to V
DD
with
a 50k& resistor.
21
AGND
Analog Ground. Connect to the high-side analog supply.
22, 25,
29, 32
SENSE4,
SENSE3,
SENSE2,
SENSE1
MOSFET Source Current-Sense Negative Inputs. Connect to the source of the power MOSFET and
connect a current-sense resistor between SENSE_ and V
EE
(see the Typical Operating Circuits).
23, 26,
30, 33
GATE4,
GATE3,
GATE2,
GATE1
Port_ MOSFET Gate Drivers. Connect GATE_ to the gate of the external MOSFET (see the Typical
Operating Circuits).
24, 27,
31, 34
OUT4, OUT3,
OUT2, OUT1
MOSFET Drain-Output Voltage Senses. Connect OUT_ to the power MOSFET drain through a resistor
(100& to 100k&). The low leakage at OUT_ limits the drop across the resistor to less than 100mV (see the
Typical Operating Circuits).
28
V
EE
Low-Side Analog Supply Input. Connect the low-side analog supply to V
EE
(-48V). Bypass with a 1礔
capacitor between AGND and V
EE
.
35
AUTO
Auto or Shutdown Mode Input. Force AUTO high to enter auto mode after a reset or power-up. Drive low
to put the MAX5965A/MAX5965B into shutdown mode. In shutdown mode, software controls the
operational modes of the MAX5965A/MAX5965B. A 50k& internal pulldown resistor defaults to AUTO low.
AUTO latches when V
DD
or V
EE
ramps up and exceeds its UVLO threshold or when the device resets.
Software commands can take the MAX5965A/MAX5965B out of AUTO while AUTO is high.
36
OSC
Oscillator Input. AC-disconnect detection function uses OSC. Connect a 100Hz ?0%, 2V
P-P
?%, +1.3V
offset sine wave to OSC. If the oscillator positive peak falls below the OSC_FAIL threshold of 2V, the ports
that have the AC function enabled shut down and are not allowed to power-up. When not using the AC-
disconnect detection function, leave OSC unconnected.
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