参数资料
型号: VTM48ET020T080A00
厂商: Vicor Corporation
文件页数: 11/18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
11.0 SINE AMPLITUDE CONVERTER TM POINT OF LOAD CONVERSION
The Sine Amplitude Converter? (SAC) uses a high frequency
resonant tank to move energy from input to output. (The
resonant tank is formed by Cr and leakage inductance Lr in the
power transformer windings as shown in the VTM ? module
Block Diagram. See Section 10). The resonant LC tank,
operated at high frequency, is amplitude modulated as a
function of input voltage and output current. A small amount
of capacitance embedded in the input and output stages of
the module is sufficient for full functionality and is key to
achieving power density.
The VTM48EF020T080A00 SAC can be simplified into the
following model:
146 pH
I OUT
R R OUT
L = 5
L IN IN = 0.6 nH
I OUT
OUT
L OUT = 600 pH
V IN IN
0.57 m Ω
C IN
160 μ Ω
C OUT
+
V
C C IN IN
R R CIN
3.2 μF
I I Q Q
94 mA
1/24 ? I OUT
+
V?I
+
0.1 Ω
1/24 ? V IN
0.98 m Ω
C
C OUT
R R COUT
310 μF
+
V OUT
K
Figure 14 — VI Chip ? module AC model
At no load:
Eq. (3) now becomes Eq. (1) and is     R OUT = 0 Ω
interesting attributes. Assuming that essentially load and I Q = 0 A,
V OUT = V IN ? K
K represents the “turns ratio” of the SAC.
Rearranging Eq (1):
(1)
independent, resistor R is now placed in series with V IN as
shown in Figure 15.
SAC
K=
V OUT
V IN
(2)
IN
Vin
+
R R
SAC?
K = 1/32
K = 1/32
Vout
V OUT
In the presence of load, V OUT is represented by:
V OUT = V IN ? K – I OUT ? R OUT
and I OUT is represented by:
(3)
Figure 15 — K = 1/32 Sine Amplitude Converter?
with series input resistor
The relationship between V IN and V OUT becomes:
I OUT =
I IN – I Q
K
(4)
V OUT = (V IN – I IN ? R) ? K
(5)
R OUT represents the impedance of the SAC, and is a function of
the R DSON of the input and output MOSFETs and the winding
resistance of the power transformer. I Q represents the
quiescent current of the SAC control and gate drive circuitry.
Substituting the simplified version of Eq. (4)
(I Q is assumed = 0 A) into Eq. (5) yields:
The use of DC voltage transformation provides additional
V OUT = V IN ? K – I OUT ? R ? K 2
(6)
VTM ? Current Multiplier
Page 11 of 18
Rev 3.2
4/2013
vicorpower.com
800 735.6200
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