参数资料
型号: VTM48ET020T080A00
厂商: Vicor Corporation
文件页数: 14/18页
文件大小: 0K
描述: VTM CURRENT MULTIPLIER 2V 80A
应用说明: Factorized Power Architecture and V-I Chips
标准包装: 1
系列: V-I Chip™, VTM™
类型: 变压模块
输出数: 1
电压 - 输入(最小): 26V
电压 - 输入(最大): 55V
输出电压: 2V
电流 - 输出(最大): 80A
电源(瓦) - 制造商系列: 160W
电压 - 隔离: 2.25kV(2250V)
应用: 商用
特点: 具有远程开/关功能
安装类型: 通孔
封装/外壳: 模块
尺寸/尺寸: 1.28" L x 0.87" W x 0.26" H(32.5mm x 22.0mm x 6.7mm)
包装: 托盘
工作温度: -40°C ~ 125°C
效率: 92.4%
电源(瓦特)- 最大: 160W
重量: 0.033 磅(14.97g)
其它名称: 1102-1170
VTM48ET020T080A00-ND
VTM 48 E x 020 y 080 A00
14.0 CURRENT SHARING
The SAC topology bases its performance on efficient transfer
of energy through a transformer without the need of closed
loop control. For this reason, the transfer characteristic can be
approximated by an ideal transformer with some resistive drop
and positive temperature coefficient.
This type of characteristic is close to the impedance
characteristic of a DC power distribution system, both in
behavior (AC dynamic) and absolute value (DC dynamic).
When connected in an array with the same K factor, the VTM ?
module will inherently share the load current (typically 5%)
with parallel units according to the equivalent impedance
divider that the system implements from the power source to
the point of load.
Some general recommendations to achieve matched array
impedances:
? Dedicate common copper planes within the PCB
to deliver and return the current to the modules.
? Provide the PCB layout as symmetric as possible.
? Apply same input / output filters (if present) to each unit.
For further details see AN:016 Using BCM ? Bus Converters
in High Power Arrays .
16.0 REVERSE OPERATION
The VTM48EF020T080A00 is capable of reverse operation.
If a voltage is present at the output which satisfies the
condition V OUT > V IN ? K at the time the VC voltage is applied,
or after the unit has started, then energy will be transferred
from secondary to primary. The input to output ratio will be
maintained. The VTM48EF020T080A00 will continue to
operate in reverse as long as the input and output are within
the specified limits. The VTM48EF020T080A00 has not been
qualified for continuous operation (>10 ms) in the reverse
direction.
+
V IN
DC
Z IN_EQ1
Z IN_EQ2
Z IN_EQn
VTM?1
R O_1
VTM?2
R O_2
VTM?n
R O_n
Z OUT_EQ1
Z OUT_EQ2
Z OUT_EQn
V OUT
Load
Figure 17 — VTM ? module array
15.0 FUSE SELECTION
In order to provide flexibility in configuring power systems
VI Chip ? products are not internally fused. Input line fusing
of VI Chip products is recommended at system level to provide
thermal protection in case of catastrophic failure.
The fuse shall be selected by closely matching system
requirements with the following characteristics:
? Current rating
(usually greater than maximum current of VTM module)
? Maximum voltage rating
(usually greater than the maximum possible input voltage)
? Ambient temperature
? Nominal melting I 2 t
VTM ? Current Multiplier
Page 14 of 18
Rev 3.2
4/2013
vicorpower.com
800 735.6200
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