参数资料
| 型号： | PSS369-7 |
| 厂商： | Power-One |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | SWITCHING REGULATOR 324W 36V |
| 标准包装： | 1 |
| 系列： | * |
PSK, PSS Series Data Sheet
?
Positive Switching Regulators
regulators by a logic signal (TTL, C-MOS, etc.). An output
voltage overshoot will not occur, when switching on or off.
The inhibit signal is referenced to the S– (pin 18). The signal
i and the switching times are specified in table 5, fig. 6 to 8.
Vi+
V ref = 2.5 V
4 k ?
JM154
S+
R ext 2
Note: With open i input, the output is enabled.
+
R
+
Sense Lines
This feature enables compensation of the voltage drop across
the connector contacts and the load lines. If the sense lines are
Gi–
Control
logic
S–
Go–
R ext1
–
V ext
connected at the load rather than directly at the connector, the
V ext ≈ 2.5 V ? –––––
V o ≈ V o nom ? –––––
user must ensure that V o max (between Vo+ and Go–) is not
exceeded.
Applying generously dimensioned cross-section load leads
reduces the voltage drop. To minimize noise pick-up, the
sense lines should be wired in parallel or twisted.
To ensure correct operation, both sense lines must be
connected to their respective power output. The voltage
difference between any sense line and its respective power
output pin (as measured on the connector) should not exceed
the values given in table 6.
Note: Sense lines should always be connected! It is recom-
mended to connect the sense lines directly at the female connector.
Table 6: Allowed voltage compensation using sense lines
Fig. 10
Voltage adjustment via R-input
R Control (Output Voltage Adjust)
Note: With open R input, V o ≈ V o nom .
The output voltage V o can either be adjusted with an external
voltage source ( V ext ) or with an external resistor ( R ext1 or R ext2 ).
The adjustment range is approx. 0 – V o max . The minimum
differential voltage ? V io min between input and output (see
Electrical Input Data ) should be maintained.
a) V o = 0 – V o max , using V ext between R and S–:
V o V ext
V o nom 2.5 V
R 1 ≈ –––––––––––
V o ≈ –––––––––––
R 2 ≈ –––––––––––––––––––––––––––––––––
V o ≈ ––––––––––––––––––––––––––––––– ––––––– ––
Nominal output
voltage
3.3 V, 5.1 V
12 – 48 V
Vi+
i
R
T
Gi –
Total voltage difference
between both sense lines
and their respective output
≤ 0.5 V
≤ 1.0 V
06046a
Vo+
S+
S–
Go –
Voltage difference
between
Go– and S–
≤ 0.25 V
≤ 0.25 V
Load
Caution: To prevent damage V ext should not exceed 20 V, nor be
negative.
b) V o = 0 to V o nom , using R ext1 between R and S–:
4000 ? ? V o V o nom ? R ext1
V o nom – V o R 1 + 4000 ?
c) V o = V o nom to V o max , using R ext2 between R and S+:
4000 ? ? V o ? ( V o nom – 2.5 V)
2.5 V ? ( V o – V o nom)
V o nom ? 2.5 V ? R ext2
2.5 V ? ( R 2 + 4000 ? ) – V o nom ? 4000 ?
Caution: R ext should never be less than 47 k ? .
Fig. 9
Sense lines connection
Current Sharing
For parallel operation of several regulators, interconnect all T-
pins to ensure that the output currents are evenly distributed.
This feature improves transient load performance and
increases system reliability. All paralleled regulators should
be supplied by equal input voltage ( V i ). The output lines
should exhibit equal length and cross section to provide equal
voltage drop.
Table 7: Maximum adjustable output voltage
Test Sockets
Test sockets (pin ? = 2 mm) for measuring the output voltage
V o at the sense lines, are located at the front side of the
regulator. The test sockets are protected by a series resistor.
LED Output Voltage Indicator
A green LED indicator shines when the output voltage is
present.
V o nom Nominal Output Volt.
Conditions
3.3 V
5.1 V
12/15 V
24 V
36 V
48 V
Unit
min typ
min typ
min typ
min typ
min typ
min typ
V o max
Maximum adjustable
V i nom , I o nom
5.6
16
26
42.5
52.8
V
output voltage with R-input
BCD20029-G Rev AB, 12-Aug-2013
MELCHER
The Power Partners.
Page 11 of 20
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