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參數(shù)資料
| 型號(hào)： | LT1740-7Z |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 500 W AC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 30/32頁 |
| 文件大?。?/td> | 1000K |
| 代理商： | LT1740-7Z |
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BCD20023 Rev. AA, 3-Sep-2008
Page 7 of 32
www.power-one.com
T Series Data Sheet
500 Watt AC-DC Converters
General conditions:
TA = 20 °C, unless specified.
Vi = 230 VAC, f i = 50 Hz
Table 5: Output data of battery charger versions
Output
LT/UT1240-7Z
LT/UT1740-7Z
LT1840-7Z
Unit
Characteristic
Conditions
min
typ max
min
typ
max
min
typ
max
Vo set
Output voltage adjustment 6
Vi nom
27.25
54.5
40.88
V
Vo set tol
Vo setting tolerance 4
Io = 0.5 Io nom
27.2
27.3
54.45
54.55 40.83
40.93
Vo
Output voltage range1
25.25
28.25 50.5
56.5
37.9
42.4
Vo
Output voltage over input
LT
Vi min – Vi max,
26.8
27.6
53.8
55
40.3
41.3
voltage and load 1
UT
(0.01 – 1) Io nom
26.9
27.6
53.8
56.6
Vo L
Overvoltage protection by second control loop
32.5
59.3
48.4
αVo
Temperature coefficient of output voltage
– 3
mV/K
Io nom
Nominal output current
14.5
10
11
A
Io L
Current limit 2
20
14.5
16
Po L
Output power limit 2
Vi nom
400
550
450
W
vo
Output voltage noise
Low frequency
Io nom
710
1000
850
mVpp
Switching freq.
IEC/EN 61204
40
Total
BW = 20 MHz
750
1005
900
Vo I
Static load regulation (droop) 1
(0.01 – 1) Io nom
– 0.4
– 0.6
V
Vo V
Static line regulation 1
Vi min – Vi max,
0.2
0.35
0.25
Io nom
Vo d
Dynamic load regulation 3
Voltage deviation UI nom
1.6
2.0
2.5
t d
Recovery time
0.1 Io nom
Io nom
0.2
s
IEC/EN 61204 5
Co
Internal output capacitance
86
41
49
mF
1
Vo decreases with rising output current due to the droop characterstic to ease current sharing; see fig. 8.
2
Due to the large output capacitance, the maximum transient value can be much higher.
3
Deviation limited by output overvoltage protection
4
Defined by temperature sensor, by remote control, and by voltage selector switch
5
See fig. Dynamic load regulation.
6
Output voltage adjustment with Vcr = 9.5 V (2.27 V/cell)
Output Characteristic
The models T1701/1702 and the battery chargers T1240/1740/
1840 can be operated in 3 different modes:
– Output voltage regulation
– Output power limitation
– Output current limitation.
In output voltage regulation mode, the converter can be
operated within the full temperature range –25 to 71 °C.
Caution: In output power or current limitation mode, the max.
ambient temperature TA should not exceed 65 °C with free air
convection cooling.
The output of all models is fully protected against continuous
short circuit. The maximum constant current is limited to Io L
(see table Electrical output data). As the LEDs indicating the
system status are driven from the output voltage, all LEDs
switch off in the case of a short circuit.
Fig. 6
Output characteristics LT1701-7 and LT1740-7Z
02
4
6
8
10
12
14
16
60
50
40
30
20
10
0
Io [A]
Vo [V]
Vi = 110 VAC
Vi = 230 VAC
Output
voltage
regulation
Output
power
limitation
Output
current
limitation
05045a
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