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参数资料
| 型号： | LT1701-7 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 550 W AC-DC REG PWR SUPPLY MODULE |
| 封装： | CASE T01, MODULE |
| 文件页数： | 2/32页 |
| 文件大小： | 1000K |
| 代理商： | LT1701-7 |
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BCD20023 Rev. AA, 3-Sep-2008
Page 10 of 32
www.power-one.com
T Series Data Sheet
500 Watt AC-DC Converters
L~
N~
Vo–
i/Vcr
Vo+
Iinh
Vinh
06116a
4
28
12
22
6
Converter
Fig. 13
Inhibit connection
Table 7: Hold-up time thold for T1701
Vo = 54 V
Vo min v
Unit
Po [W]
46 V
43 V
40 V
38 V
100
164
219
270
302
ms
200
82
109
135
151
300
55
73
90
101
400
41
55
67
75
500
33
44
54
60
550
30
40
49
55
Hold-Up Time
The hold-up time depends upon the output voltage at the time
of failure, the minimum acceptable output voltage, and the load
according to the formula:
Vo2 – Vo2 min v
t hold = –––––––––––– (Co + Cext)
2 Po
where:
Vo
= Output voltage at the moment of mains’ failure
Vomin v = Minimum acceptable output voltage
Po
= Average output power during hold-up time
Co
= Internal output capacitance
Cext
= External output capacitance
Examples of t hold are given in the table below:
Fig. 14
Hold-up and warning time with Power Down output signal.
Note: The table Hold-up time also informs about the warning time
of the Power Down signal. For example, if the threshold level Vt of
the Power Down signal is set to 43 V and the minimum acceptable
voltage of the load is 38 V, the time between the activation of the
power-down signal and the switch-off of the load (550 W) will be
15 ms (= 55 ms – 40 ms).
Series and Parallel Connection
The output of the T Series converters may either be connected
in series or in parallel.
Connection in parallel: Current sharing between paralleled
converters
is
ensured
by
the
output
droop
(slope)
characteristic.
Note: Several Txx40 battery chargers connected in parallel can be
controlled by a single voltage source or a single sensor wired to
the inputs i/Vcr.
Connection in series: A maximum of two T Series converters
may be connected in series, however the resulting output
voltage of up to 110 V would no longer be SELV.
Vo
Vo min v
Vt
mains' failure
warning time
thold
t
V
low load
heavy load
05049a
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