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参数资料
| 型号： | LT1240-7DZFB1 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 500 W AC-DC REG PWR SUPPLY MODULE |
| 封装： | CASE T01, MODULE |
| 文件页数： | 25/33页 |
| 文件大小： | 864K |
| 代理商： | LT1240-7DZFB1 |
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Cassette Style
AC-DC Converters
T Series
Edition 5/5.2000
31/33
Further information about designing battery systems is con-
tained in VDE 0510, part 2.
If a T unit is to be parallel connected with another T unit, it is
recommended to connect the two hot plug-in pins of each
female connector, HC+ (pin 16) and HC– (pin 18) to their
respective output pins Vo+ and Vo- to provide the hot plug-
in capabilities.
In case of remote temperature control, the temperature
sensor should be connected according to its wiring dia-
gram. Wrong connection may damage the sensor.
Make sure that there is sufficient air flow available for con-
vection cooling. This should be verified by measuring the
case temperature when the unit is installed and operated in
the end-use application. The maximum specified case tem-
perature
TC max must not be exceeded. See also: Thermal
Considerations.
If the end-product is to be UL certified, the temperature test
may be repeated asv part of the end-product investigation.
Ensure that a unit failure (e.g. by an internal short-circuit)
does not result in a hazardous condition. See also:
Safety
of operator accessible output circuit.
Cleaning Agents
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented, since the power supplies
are not hermetically sealed.
Audible Noise
Under certain operating conditions, a T series AC-DC con-
verter may generate a slight audible noise due to magneto-
striction in the transformer. This noise does neither affect
the function of the unit nor is it detrimental to its perform-
ance over time.
Standards and approvals
All T series AC-DC converters correspond to class I equip-
ment. They are UL recognized according to UL 1950, UL
recognized for Canada to CAN/CSA C22.2 No. 950-95 and
LGA approved to IEC/EN 60950 standards and have been
evaluated in accordance with these standards for:
Building in
Basic insulation between input and case, based on
250 V AC
Double or reinforced insulation between input and out-
put, based on 250 V AC
Operational insulation between output and case
The use in a pollution degree 2 environment
Connecting the input to a primary circuit with a maxi-
mum transient rating of 2500 V (overvoltage class III
based on a 110 V primary circuit, overvoltage class II
based on a 230 V primary circuit).
The AC-DC converters are subject to manufacturing sur-
veillance in accordance with
the above mentioned UL,
CSA, EN and with ISO 9001 standards.
Isolation
The electric strength test is performed as factory test in ac-
cordance with IEC/EN 60950 and UL 1950 and should not
be repeated in the field. Power-One will not honour any
guarantee claims resulting from electric strength field tests.
Important: Testing by applying AC voltages will result in
high and dangerous leakage currents flowing through
the Y-capacitors (see fig.:
Block diagram).
Table 22: Isolation
Characteristic
LT/UT AC-DC converter
Sensor
Unit
Input to
Output to
case
output
case
Electric
Required according to IEC/EN 60950
1.5
3.0 1
0.5
kVrms
strength
2.1
4.2 1
0.7
kV DC
test voltage
Actual factory test 1 s
2.8
5.6 1
1.4
AC test voltage equivalent to actual
2.0
4.0 1
1.0
kVrms
factory test
Insulation resistance at 500 V DC
>300
>100
M
1 In accordance with IEC/EN 60950 only subassemblies are tested in factory with this voltage.
V
MI
500
1500
10 k
220 nF
22 nF
10061
Fig. 55
Measuring instrument (MI) for earth leakage current tests
according to IEC/EN 60950, Annex D.
Leakage Currents in AC-DC operation
Leakage currents flow due to internal leakage capacitance
and RFI suppression Y-capacitors. The current values are
proportional to the mains voltage and nearly proportional to
the mains frequency. They are specified at maximum oper-
ating input voltage where phase, neutral and protective
earth are correctly connected as required for class I equip-
ment.
Under test conditions, the leakage current flows through a
measuring instrument (MI) as described in fig.:
Measuring
instrument for earth leakage current tests, which takes into
account impedance and sensitivity of a person touching
unearthed accessible parts. The current value is calculated
by dividing the measured voltage by 500
. If inputs and/or
outputs of T units are connected in parallel, their individual
leakage currents are added.
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相关代理商/技术参数 |
参数描述 |
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| LT1240-7Z | 制造商:POWER-ONE 制造商全称:Power-One 功能描述:500 Watt AC-DC Converters |
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| LT1241CN8 | 功能描述:IC REG CTRLR ISO PWM CM 8-DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT1241CN8#PBF | 功能描述:IC REG CTRLR ISO PWM CM 8-DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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