收藏本站
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
ON_
FORCE-ON
BIT
EN1_BIT
CHANNEL
EN2_BIT
ENABLED
ANALOG SLOW_TRIP
S
Q
RETRY PIN
ANALOG FAST_TRIP
R
Q
200ms DELAY,
THEN PULSE
UV/OV CRITICAL
PROT
S
R
Q
Q
Figure 1. Channel On-Off Control Logic Functional Schematic
To determine the output dV/dt during startup, divide
the GATE_ pullup current I G(UP) by the gate-to-ground
capacitance. The voltage at the source of the external
MOSFET follows the gate voltage, so the load dV/dt is
the same as the gate dV/dt. Inrush current is the product
of the dV/dt and the load capacitance. The time to start
up t SU is the hot-swap voltage VS_ divided by the output
dV/dt.
Be sure to choose an external MOSFET that can handle
the power dissipated during startup. The inrush cur-
rent is roughly constant during startup, and the voltage
drop across the MOSFET (drain to source) decreases
linearly as the load capacitance charges. The resulting
power dissipation is therefore roughly equivalent to a
single pulse of magnitude (VS_ x Inrush current)/2 and
duration t SU . Refer to the thermal resistance charts in
the MOSFET data sheet to determine the junction tem-
perature rise during startup, and ensure that this does
not exceed the maximum junction temperature for worst-
case ambient conditions.
Circuit-Breaker Protection
As the channel is turned on and during normal opera-
tion, two analog comparators are used to detect an
overcurrent condition by sensing the voltage across
an external resistor connected between SENSE_ and
MON_. If the voltage across the sense resistor is less
than the slow-trip and fast-trip circuit-breaker thresholds,
the GATE_ output remains high. If either of the thresholds
is exceeded due to an overcurrent condition, the gate
of the MOSFET is pulled down to MON_ by an internal
500mA current source.
The higher of the two comparator thresholds, the fast-
trip, is set by an internal 8-bit DAC (see Table 8),
within one of three configurable full-scale current-sense
ranges: 25mV, 50mV, or 100mV (see Tables 7a and 7b).
The 8-bit fast-trip threshold DAC can be programmed
16
_____________________________________________________________________________________
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX5976BEVKIT+ EVAL KIT MAX5976B
MAX5977AEVKIT# EVAL KIT MAX5977A
MAX5980EVKIT# EVAL KIT MAX5980
MAX5982CEVKIT# EVAL KIT MAX5982C
MAX6397SATA+T IC SW OVERVOLT PROT 8-TDFN
MAX6496EVKIT+ KIT EVAL FOR MAX6496
MAX6651EVKIT EVAL KIT FOR MAX6651
MAX7325EVKIT+ KIT EVAL FOR MAX7325
相关代理商/技术参数
MAX5971AETI+ 功能描述:热插拔功率分布 IEEE 802.3af/at PSE 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
MAX5971AETI+T 功能描述:热插拔功率分布 IEEE 802.3af/at PSE 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
MAX5971AETI+W 制造商:Maxim Integrated Products 功能描述:IEEE802.3 AT PSE SWITCH - Rail/Tube
MAX5971AEVKIT 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
MAX5971AEVKIT+ 制造商:Maxim Integrated Products 功能描述:PD INTERFACE CONTROLLER - Boxed Product (Development Kits)
MAX5971BETI 制造商:Maxim Integrated Products 功能描述:
MAX5971BETI+ 功能描述:热插拔功率分布 IEEE 802.3af/at PSE 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
MAX5971BETI+T 功能描述:热插拔功率分布 IEEE 802.3af/at PSE 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