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參數資料
| 型號： | TXS75ZY-P2R2V |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 90 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 2.400 X 3.450 INCH, 0.500 INCH HEIGHT, 3/4 BRICK PACKAGE-14 |
| 文件頁數： | 10/27頁 |
| 文件大?。?/td> | 2635K |
| 代理商： | TXS75ZY-P2R2V |
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Product Specification
TXS Series: 75…120 A DC-DC Converters
36 to 75 V DC Input, 1.2, 1.5, 1.8, 2.0 and 2.5 V Output, 90 W to 250 W
REV. FEB 18, 2003
18 of 27
www.power-one.com
Safety Considerations
TXS modules have been designed for building into
system
applications
in
pollution
degree
2
environments
1.
The converters provide basic insulation
1 from
input to output and from input to the metallic base
plate. The insulation supports 1500 V DC electric
strength test voltage and has an insulation
resistance >50 M
.
The converters provide functional insulation
1
between output and base plate. The insulation
supports 500 V DC electric strength test voltage.
The base plate is normally floating. For safety
reasons the base plate may only be connected to
the secondary or safety ground.
If the system using the converter requires safety
agency approval, certain rules should be followed
in the design of the system. In particular, all
creepage and clearance distance requirements of
the appropriate standard should be observed. This
document refers to UL 60950, EN 60950:2000 and
CSA 60950-00 only. Specific applications may
have additional requirements.
The converter has no internal fuse. An external
fuse should be provided to protect the system. For
UL purpose the fuse needs to be UL-listed. A fuse
rating not greater than 10 A is recommended. The
user can select a lower rating fuse based upon the
inrush transient of the input filter and the maximum
input current of the converter (see page 2). Both
input tracks and the chassis ground track (if
applicable) should be capable of conducting a
current of 1.5 times the value of the fuse without
failure. The fuse should be placed in the non-
grounded input line.
The maximum specified input voltage is 100 V
DC for 100 ms. Exceeding of this voltage limit may
destroy the input stage of the converter but it will
not damage the insulation
2.
If an input supply other than SELV is used, the
components on the primary of the converter may
need to be considered as hazardous. The report:
“TXS layout considerations” on the TXS CD ROM
provides recommendations for the PCB layout
beneath the converter.
1 According to UL 60950, EN 60950:2000, CSA 60950-00
2 The creepage and clearance distance and the insulation
thickness were dimensioned for 200 V DC. The
converters have been approved for basic insulation. It is
in the responsibility of the customer to use the converter
in applications, where supplementary insulation is
required.
Definitions
The following section should help to classify the
supplying circuit of the converter. For the precise
identification of the voltage types in a system, the
relevant safety standard should be used.
Primary circuit = Circuit connected to the AC mains
which makes it hazardous per definition.
Secondary circuit = Circuit which is isolated from a
primary circuit. A battery without connection to a
primary circuit is considered to be a secondary
circuit.
SELV, ELV and TNV are secondary circuits.
SELV = User accessible secondary circuit with
U <60 V DC and no transients. An SELV circuit
remains safe even after single faults.
ELV = Basic insulated circuit with the same limits
as a SELV circuit but without protection to 60 V in
case of a single fault.
TNV = Double or reinforced insulated secondary
circuit, isolated from earth and connected to a
telecommunication network or a circuit meeting the
TNV specifications.
Table 8: Normal condition:
With
Transients
1
Without Transients
TNV-1
ELV
SELV
<60 V DC or 42.4 V AC peak
TNV-3
TNV-2
<120 V DC or 70.7 V AC peak
2
Table 9: Maximum voltage after a single fault:
With
Transients
1
Without Transients
TNV-1
ELV
SELV
<120 V continuous
3
Possibly
hazardous
<60 V, 120 V
for 0.2 s max
TNV-3
TNV-2
<120 V continuous
3
1 Up to 1.5 kV transients possible.
2 For DC voltages with overlaid AC voltages the limit:
UAC/70.7 V + UDC/120 V < 1 applies.
Exception: According deviation 2 in UL60950, the limit
80 V DC instead of 120 V DC applies in a DC-power
system for TNV2.
3 In the event of a single fault, the voltage can
rise to 1500 V for 1 ms, then fall down to 400 V within
14 ms and stay at 400 V DC over 185 ms. Limiting
curve, see figure in IEC 60950:2000.
SELV:
Safety Extra Low Voltage
ELV:
Extra Low Voltage
TNV:
Telecommunication Network Voltage
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