- 您现在的位置：买卖IC网 > Sheet目录1236 > PI2007-EVAL2 (Vicor Corporation)EVAL BRD FOR PI2007 12V/15A
?
Functional Description:
The PI2007 Cool-ORing controller IC is designed to
drive single or parallel N-channel MOSFETs in high
side Active ORing applications. The PI2007 used
with an external MOSFET can function as an ideal
ORing diode in the high side of a redundant power
system, significantly reducing power dissipation and
eliminating the need for heatsinking.
An N-channel MOSFET in the conduction path offers
extremely low on-resistance resulting in a dramatic
reduction of 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 MOSFET,
current will flow in the forward and reverse directions
while the gate remains above the gate threshold
voltage. Ideal ORing applications should not allow
reverse current flow, so the controller has to be
capable of very fast and accurate detection of
reverse current caused by input power source
failures, and very fast turn off of the gate of the
MOSFET. 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.
Differential Amplifier:
The PI2007 integrates a high-speed low offset
There is a bias current path from SN to SP during
the reverse fault condition. The bias current is
proportional to the voltage between SN and SP.
The maximum SN pin bias current is 9mA when
V SN =80V and V SP =0V and assumes that the
in the Application Information section for more
details.
Forward Voltage Comparator: FWD
The FWD comparator detects when a forward
voltage condition exists and SP is above 275mV
(typical) positive with respect to SN. When SP-SN is
more than 275mV, the FWD comparator will assert
the Gate Status low to report a fault condition.
VC and Internal Voltage Regulator:
The PI2007 has a separate input VC that provides
power to the control circuitry, charge pump and gate
driver. An internal regulator clamps the VC voltage
(V VC-SGND ) to 11.7V.
The internal regulator circuit has a comparator to
monitor the VC voltage and pulls the GATE pin low
when the VC is lower than the VC Under-Voltage
Threshold.
In 12V Bus applications (10V to 14V) the VR input
pin can be connected to the input voltage eliminating
the need for an external limiter. An i nternal 420Ω
resistor is connected between the VR pin and the
internal regulator VC pin.
Charge Pump:
The PI2007 has an integrated charge pump that
voltage differential amplifier to sense the difference
approximately
doubles the VC voltage
with
between the Sense Positive (SP) pin voltage and
Sense Negative (SN) pin voltage with high accuracy.
The amplifier output is connected to the Reverse
and Forward comparators.
Reverse Current Comparator: RVS
The reverse current comparator provides the critical
function in the controller, detecting negative voltage
caused by reverse current. When the SN pin is 6mV
higher than the SP pin, the reverse comparator will
force the gate discharge circuit to turn off the
MOSFETs in typically 80ns.
The reverse comparator will hold the gate low until
reference to the SGND pin, to drive the N-Channel
MOSFET gate to a voltage higher than the input
voltage at 15μA minimum source current.
Gate Driver:
The gate driver (GATE) output is configured to drive
an external N-channel MOSFET. In the high state,
the gate driver applies a 20μA typical current source
to the MOSFET gate from the integrated charge
pump. The Charge Pump voltage is limited to
2*(V VC – V SGND -1V).
When a reverse current fault is initiated, the gate
driver pulls the GATE pin low to the PGND pin and
the SP pin is 6mV higher than the SN pin.
The
discharges the MOSFET gate with 4A typical peak
Figure 3: Reverse comparator hysteresis: V SP - V SN
capability.
Fault Indication: FT
The FT pin is an open collector NPN that will be
pulled low when the Gate pin is low. The FT pin is
also pulled low when V VC-SGND is below UVLO or
during the following fault conditions as indicated in
the table below:
Picor Corporation ? picorpower.com
PI2007
Rev 1.3
Page 5 of 19
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
PI2126-EVAL1
EVALUATION BOARD FOR PI2126
PI2127-EVAL1
EVAL BRD FOR PI2127 60V/12A
PI2161-EVAL1
EVALUATION BOARD FOR PI2161
PI2211-EVAL1
BOARD EVAL FOR PI2211
PI5101-EVAL1
EVALUATION BOARD FOR PI5101
PICOSMDC035S-2
POLYSWITCH PTC RESET .35A 0805
PIIPM25P12B008X
IC PWR MODULE PROG ISO 25A 1200V
PK3020KB
KIT KEYPAD, MOUSE, AND USB HUB
相关代理商/技术参数
PI200MC-A4
制造商:AMI 制造商全称:AMI 功能描述:200DPI CIS Module
PI201M-A4
制造商:AMI 制造商全称:AMI 功能描述:200DPI CIS Sensor
PI20-5,08
功能描述:可插拔接线端子 PCB Hdr, 45 Deg, 5,08 PitchOpen End, 20pole, 12A,300V,Grn RoHS:否 制造商:Phoenix Contact 产品:Plugs 系列:PTS 端接类型:Spring Cage 位置/触点数量:5 线规量程:26-14 节距:5 mm 电流额定值:10 A 电压额定值:250 V 安装风格: 安装角: 触点电镀:
PI-205M
制造商:Polycase 功能描述:Enclosure, Computer, Desktop, ABS,UL94-5VA, Blue, 4x3x1.375 In, For Raspberry Pi
PI2061-00-QEIG
制造商:Vicor Corporation 功能描述:PI2061 Series 8.5 - 10.5 V 4 A Load Disconnect Switch Controller IC - TDFN-10
PI207MC-A4
制造商:AMI 制造商全称:AMI 功能描述:200DPI CIS Module
PI2121
制造商:VICOR 制造商全称:Vicor Corporation 功能描述:8 Volt, 24 Amp Full-Function Active ORing Solution
PI2121-00-LGIZ
功能描述:IC OR CTRLR N-CH 17LGA RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:Picor®, Cool-ORing® 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR)