参数资料
| 型号： | PI2121-00-LGIZ |
| 厂商： | Vicor Corporation |
| 文件页数： | 6/21页 |
| 文件大小： | 0K |
| 描述： | IC OR CTRLR N-CH 17LGA |
| 产品培训模块： | Cool-ORing? Series |
| 标准包装： | 50 |
| 系列： | Picor®, Cool-ORing® |
| 应用： | 冗余电源，电信基础结构 |
| FET 型： | N 沟道 |
| 输出数： | 1 |
| 内部开关： | 是 |
| 电源电压： | 4.5 V ~ 13.2 V |
| 电流 - 电源： | 3.7mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | 管件 |
| 其它名称： | 1102-1107-5 |
?
Functional Description:
The PI2121 integrated Cool-ORing product takes
advantage of two different technologies combining a
1.5m Ω on-state resistance (Rds(on)) single N-
channel MOSFET with high density control circuitry.
This combination provides superior density,
minimizing PCB space to achieve an ideal ORing
diode function, significantly reducing power
dissipation and eliminating the need for heat sinking,
while minimizing design complexity.
The PI2121’s 1.5m Ω on-state resistance MOSFET
used in the conduction path enables a dramatic
reduction in power dissipation versus the
performance of a diode used in conventional ORing
applications due to its high forward voltage drop.
This can allow for the elimination of complex heat
sinking and other thermal management
requirements. Due to the inherent characteristics of
the integrated MOSFET, while the gate remains
enhanced above the gate threshold voltage it will
allow current to flow in the forward and reverse
direction. Ideal ORing applications do not allow for
reverse current flow, so the integrated controller has
to be capable of very fast and accurate detection of
reverse current caused by input power source
failures, and turn off the gate of the MOSFET as
quickly as possible. Once the gate voltage falls
below the gate threshold, the MOSFET is off and the
body diode will be reverse biased preventing reverse
current flow and subsequent excessive voltage
droop on the redundant bus. During forward over-
current conditions caused by load faults, the
controller maintains gate drive to the MOSFET to
keep power dissipation as low as possible,
otherwise the inherent body diode of the MOSFET
would conduct, which has higher effective forward
drop. Conventional ORing solutions using diodes
offer no protection against forward over-current
Reverse Comparator: RVS
The reverse comparator is the most critical
comparator. It looks for negative voltage caused by
reverse current. When the SN pin is 6mV higher
than the SP pin, the reverse comparator will enable
the BK current source to charge an internal 2pF
capacitor. The blanking timer provides noise filtering
for typical switching power conversion that might
cause premature reverse current detection. Once
the voltage across the capacitor reaches the timer
threshold voltage (1.25V) the MOSFET will be
turned off. The shortest blanking time is 50ns when
BK is connected to ground. The Blanking time will
be added to the controller delay time. The Electrical
Specifications in the DIFFERENTIAL AMPLIFIER
AND COMPARATOR section for Reverse Fault to
Slave Low Delay Time “t RVS-MS or t RVS-SL ” is the
controller delay time plus the blanking time.
Reverse Blanking Timer: BK
Connecting an external resistor ( R BK ) between the
BK pin and ground will increase the blanking time as
shown in the following chart.
Where: R BK ≤ 200 K Ω
If BK is connected to VC for slave mode operation,
then the blanking time will be about 320ns typically,
and total delay time will be 430ns.
The reverse comparator has 3mV of hysteresis
referenced to SP-SN.
If the conditions are met for a reverse current fault,
then the active-low fault flag output will also indicate
a fault to the system after the 40μs fault delay time.
conditions. During the
forward over-current
condition, the PI2121 will provide an active-low fault
flag to the system via the fault pin. The fault flag is
also issued during the reverse current condition,
light load conditions, VC under-voltage, Input Under-
Voltage and Over-Voltage and Over-Temperature
conditions.
Differential Amplifier:
The PI2121 integrates a high-speed, low offset
voltage differential amplifier to sense the difference
between the Sense Positive (SP) pin voltage and
Sense Negative (SN) pin voltage with high accuracy.
The amplifier output is connected to three
comparators: Reverse
comparator, Forward
comparator, and Forward over-current comparator.
Picor Corporation ? picorpower.com
PI2121
Rev. 1.1
Page 6 of 21
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| PI2121-EVAL1 | 功能描述:BOARD EVAL ORING CTRLR PI2121 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:Picor®, Cool-ORing® 标准包装:1 系列:- 主要目的:数字电位器 嵌入式:- 已用 IC / 零件:AD5258 主要属性:- 次要属性:- 已供物品:板 相关产品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP |
| PI2122 | 制造商:VICOR 制造商全称:Vicor Corporation 功能描述:12Amp Active ORing Solution With Load Disconnect |
| PI2122-00-LGIZ | 制造商:VICOR 制造商全称:Vicor Corporation 功能描述:12Amp Active ORing Solution With Load Disconnect |
| PI2122-EVAL1 | 制造商:Vicor Corporation 功能描述:PI2122 Full Function Active ORing w/ Load Disconnect Evaluation Board |
| PI2123 | 制造商:VICOR 制造商全称:Vicor Corporation 功能描述:15 Volt, 15 Amp Full-Function Active ORing Solution |
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