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参数资料
| 型号： | ADM1170-2AUJZ-RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR HOTSWAP 16.5V TSOT-23-8 |
| 产品培训模块： | Hot Swap Design |
| 标准包装： | 1 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 2.7 V ~ 16.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 薄型，TSOT-23-8 |
| 供应商设备封装： | TSOT-23-8 |
| 包装： | 标准包装 |
| 产品目录页面： | 792 (CN2011-ZH PDF) |
| 配用： | EVAL-ADM1170EBZ-ND - BOARD EVALUATION FOR ADM1170 |
| 其它名称： | ADM1170-2AUJZ-RL7DKR |
ADM1170
gate voltage of the external FET. This minimizes the bus supply
voltage drop caused by the fault and protects neighboring cards.
As the voltage across the sense resistor approaches the current
limit, a timer activates. This timer resets again if the sense
voltage returns below this level. If the sense voltage is any
Data Sheet
When the initial cycle ends, a start-up cycle activates and the
GATE pin is pulled high; the TIMER pin continues to pull down.
V IN
1
voltage below 44 mV, the timer is guaranteed to be off. Should
the current continue to increase, the ADM1170 tries to regulate
the gate of the FET to achieve a limit of 50 mV across the sense
resistor. However, if the device is unable to regulate the fault
V ON
V TIMER
2
3
4
current and the sense voltage further increases, a larger pull-
down, in the order of milliamperes, is enabled to compensate
for fast current surges. If the sense voltage is any voltage greater
than 56 mV, this pull-down is guaranteed to be on. When the
timer expires, the GATE pin shuts down.
TIMER FUNCTION
V GATE
V OUT
The TIMER pin is responsible for several key functions on the
RESET
MODE
INITIAL
CYCLE
NORMAL
CYCLE
and the amount of time an overcurrent condition lasts before
the FET shuts down. On the ADM1170-1 , the timer pin also
controls the time between auto retry pulses. There are pull-up
and pull-down currents internally available to control the timer
functions. The voltage on the TIMER pin is compared with two
V IN
START-UP
CYCLE
Figure 33. Power-Up Timing
threshold voltages: COMP1 (0.2 V) and COMP2 (1.3 V). The
V ON
5μA
60μA
2μA
Table 5.
Timing Current
Pull-up
Pull-up
Pull-down
Pull-down
Level (μA)
5
60
2
100
V TIMER
V GATE
100μA
V OUT
POWER-UP TIMING CYCLE
The ADM1170 is in reset when the ON (ON-CLR) pin is held
low. The GATE pin is pulled low and the TIMER pin is pulled
I RSENSE
low with a 100 μA pull-down. At Time Point 2 in Figure 33, the
RESET
INITIAL START-UP
NORMAL
ON (ON-CLR) pin is pulled high. For the device to startup
MODE
CYCLE
CYCLE
CYCLE
correctly, the supply voltage must be above UVLO, the ON
(ON-CLR) pin must be above 1.3 V, and the TIMER pin voltage
must be less than 0.2 V. The initial timing cycle begins when these
three conditions are met, and the TIMER pin is pulled high with
5 μA. At Time Point 3, the TIMER reaches the COMP2 threshold.
This is the end of the first section of the initial cycle. The 100 μA
current source then pulls down the TIMER pin until it reaches
0.2 V at Time Point 4. The initial cycle delay (Time Point 2 to
Time Point 4) relates to C TIMER by equation
Figure 34. Power-Up into Capacitor
CIRCUIT BREAKER TIMING CYCLE
When the voltage across the sense resistor exceeds the circuit
breaker trip voltage, the 60 μA timer pull-up current is activated.
If the sense voltage falls below this level before the TIMER pin
reaches 1.3 V, the 60 μA pull-up is disabled and the 2 μA pull-
down is enabled. This is likely to happen if the overcurrent fault
is only transient, such as an inrush current. This is shown in
t INITIAL = 1.3 × C TIMER /5 μA
(4)
and the sense voltage remains above the circuit breaker trip
voltage, the 60 μA pull-up remains active. This allows the TIMER
pin to reach the high trip point of 1.3 V and initiate the GATE
shutdown. On the ADM1170-2 , the TIMER pin continues pulling
up but switches to the 5 μA pull-up when it reaches the 1.3 V
Rev. A | Page 12 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1171 | 制造商:AD 制造商全称:Analog Devices 功能描述:2.7 V to 16.5 V Hot Swap Controller with Current Sense Output |
| ADM1171-1AUJ | 制造商:Analog Devices 功能描述:ADI HOT SWAP CONTROLLER - Bulk |
| ADM1171-1AUJZ-RL7 | 功能描述:IC CTRLR HOTSWAP 16.5V TSOT-23-8 RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| ADM1171-2AUJ | 制造商:Analog Devices 功能描述:ADI HOT SWAP CONTROLLER - Bulk |
| ADM1171-2AUJZ-RL7 | 功能描述:IC CTRLR HOTSWAP 16.5V TSOT-23-8 RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
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