参数资料
| 型号： | MAX5969AEVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT MAX5969A |
| 标准包装： | 1 |
| 系列： | * |
IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated Power MOSFET
When the MAX5969A/MAX5969B are powered by a Type 2
PSE, the 2-event identification output 2EC asserts low
after the internal isolation n-channel MOSFET is fully
turned on. 2EC current sink is turned off when V DD goes
below the UVLO threshold (V OFF ) and turns on when
V DD goes above the UVLO threshold (V ON ), unless V DD
goes below V THR to reset the latched output of the Type 2
PSE detection flag.
Alternatively, the 2EC output also serves as a wall adapt-
er detection output when the MAX5969A/MAX5969B are
powered by an external wall power adapter. See the Wall
Power Adapter Detection and Operation section for more
information.
Power Mode (Wake Mode)
The MAX5969A/MAX5969B enter power mode when V IN
rises above the undervoltage lockout threshold (V ON ).
When V IN rises above V ON , the MAX5969A/MAX5969B
turn on the internal n-channel isolation MOSFET to con-
nect V SS to RTN with inrush current limit internally set
to 135mA (typ). The isolation MOSFET is fully turned on
when the voltage at RTN is near V SS and the inrush cur-
rent is reduced below the inrush limit. Once the isolation
MOSFET is fully turned on, the MAX5969A/MAX5969B
change the current limit to 800mA. The open-drain
power-good output (PG) remains low for a minimum of
t DELAY until the power MOSFET fully turns on to keep the
downstream DC-DC converter disabled during inrush.
Undervoltage Lockout
The MAX5969A/MAX5969B operate up to a 60V sup-
ply voltage with a turn-on UVLO threshold (V ON ) at
35.4V/38.6V and a turn-off UVLO threshold (V OFF ) at 31V.
When the input voltage is above V ON , the MAX5969A/
MAX5969B enter power mode and the internal MOSFET
is turned on. When the input voltage goes below V OFF for
more than t OFF_DLY , the MOSFET turns off.
Power-Good Output
An open-drain output (PG) is used to allow disabling
downstream DC-DC converter until the n-channel isola-
tion MOSFET is fully turned on. PG is pulled low to V SS
for a period of t DELAY and until the internal isolation
MOSFET is fully turned on. The PG is also pulled low
when coming out of thermal shutdown.
Thermal-Shutdown Protection
The MAX5969A/MAX5969B include thermal protection
from excessive heating. If the junction temperature
exceeds the thermal-shutdown threshold of +140 N C,
the MAX5969A/MAX5969B turn off the internal power
MOSFET and 2EC current sink. When the junction tem-
perature falls below +112 N C, the devices enter inrush
mode and then return to power mode. Inrush mode
ensures the downstream DC-DC converter is turned off
as the internal power MOSFET is turned on.
Wall Power Adapter Detection
and Operation
For applications where an auxiliary power source such
as a wall power adapter is used to power the PD,
the MAX5969A/MAX5969B feature wall power adapter
detection. Once the input voltage (V DD - V SS ) exceeds
the mark event threshold, the MAX5969A/MAX5969B
enable wall adapter detection. The wall power adapt-
er is connected from WAD to RTN. The MAX5969A/
MAX5969B detect the wall power adapter when the
voltage from WAD to RTN is greater than 9V. When a
wall power adapter is detected, the internal n-channel
isolation MOSFET turns off, 2EC current sink turns on,
and classification current is disabled if V IN is in the clas-
sification range.
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5969AEVKIT# | 功能描述:电源管理IC开发工具 MAX5969A Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX5969BETB+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube 制造商:Maxim Integrated Products 功能描述:1-/2-CHANNEL, 2-WIRE SERIAL, 12-BIT ADCS |
| MAX5969BETB+T | 功能描述:热插拔功率分布 802.3at PD Int Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5969BETE+T | 功能描述:热插拔功率分布 802.3at PD Int Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5969BEVKIT | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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