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參數(shù)資料
| 型號： | LH3040-2-D3 |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT 44 W AC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-32/11 |
| 文件頁數(shù)： | 7/21頁 |
| 文件大小： | 984K |
| 代理商： | LH3040-2-D3 |
H Series Data Sheet
70 Watt AC-DC Converters
BCD20019 Rev AA
Page 15 of 21
www.power-one.com
Safety of Operator-Accessible Output Circuits
If the output circuit of a DC-DC converter is operator-
accessible, it shall be an SELV circuit according to the safety
standard IEC/EN 60950.
The table below shows a possible configuration, compliance
with which causes the output to be an SELV circuit up to a
configured output voltage of 36 V (sum of the nominal voltages
connected in series).
Fig. 17
Schematic safety concept.
Table 12: Isolation
Characteristic
Input to case
Output(s) to
Output to
Unit
and output(s)
case
output
Electric
Factory test >1 s
2.8 1
1.4
0.3
kVDC
strength
AC test voltage equivalent
2.0
1.0
0.2
kVAC
test
to factory test
Insulation resistance at 500 VDC
>300
>100 2
M
1 According to EN 50116 and IEC/EN 60950, subassemblies connecting input to output are pre-tested with 5.6 kVDC or 4 kVAC.
2 Tested at 300 VDC
AC-DC
con-
verter
Mains
SELV
Earth connection
+
–
~
10021a
Fuse
Table 13: Safety concept leading to an SELV output circuit
Conditions
AC-DC converter
Installation
Result
Nominal Supply
Grade of insulation between
Measures to achieve the resulting
Safety statuts of the AC-DC
voltage
input and output, provided
safety statuts of the output circuit
converter output circuit
by the AC-DC converter
Mains
≤250 V AC
Double or reinforced
Earthed case 1 and installation
SELV circuit
according to the applicable standards
1 The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC/EN 60950
Description of Options
D Undervoltage Monitor
The input and/or output undervoltage monitoring circuit
operates independently of the built-in input undervoltage
lockout circuit. A logic "low" (JFET output) or "high" signal
(NPN output) is generated at pin 5, as soon as one of the
monitored voltages drops below the preselected threshold
Table 14: Survey of options
Option
Function of Option
Characteristic
D
Input and/or output undervoltage monitoring circuitry
Safe data signal output (D1 – D8)
V 1
Input and output undervoltage monitoring circuitry
ACFAIL signal according to VME specifications ( V2, V3)
1 Option V is only available for models with 5.1 V main output; it excludes option D.
level Vt. The return for this signal is Vo1– (pin 23). The D output
recovers, when the monitored voltages exceeds Vt + Vh. The
threshold level Vt is adjustable by a potentiometer, accessible
through a hole in the front cover.
Option D exists in various versions D1 – D8 as shown in table
15.
Table 15: Undervoltage monitor functions
Output type
Monitoring
Minimum adjustment range
Typical hysteresis Vh [% of Vt]
JFET
NPN
Vi
Vo1
of threshold level Vt
for Vt min – Vt max
Vti
Vto
Vhi
Vho
D1
D5
no
yes
–
3.5 V – 48 V 1
–
2.3 – 1
D2
D6
yes
no
Vi min – Vi max 1–
3.0 – 0.5
–
D3
D7
yes
Vi min – Vi max 1
0.95 – 0.98 Vo1 2
3.0 – 0.5
"0"
D4
D8
no
yes
–
0.95 – 0.98 Vo1 2
–
"0"
1 Threshold level adjustable by potentiometer (not recommended for mobile applications)
2 Fixed value between 95% and 98% of Vo1 (tracking)
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