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参数资料
| 型号： | TXS80ZD-NP2R2H |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 200 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 2.400 X 3.450 INCH, 0.500 INCH HEIGHT, 3/4 BRICK PACKAGE-14 |
| 文件页数： | 6/27页 |
| 文件大小： | 2635K |
| 代理商： | TXS80ZD-NP2R2H |
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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
14 of 27
www.power-one.com
Limits:
The combined Uo set by trim and sense should not
exceed 120 % Uo nom. The minimum Uo set by trim
should not be set below 88 % Uo nom. For increased
trim range use the option wide trim (option R).
Note:
When the output voltage is trimmed upwards, the
output power Po from the converter should not
exceed its maximum rating Po. (The voltage
directly at the output pins multiplied by the output
current).
Wide Trim Range
The wide trim range option (option R) will allow an
extended adjustment range of 70…110 % Uo nom,
Option R covers two neighbouring output voltages.
If trimmed down, the converters perform identically
to the standard types, if trimmed up, the converters
have slightly increased loss compared to the
standard types.
The adjustment functions differently for the wide
trim range as for the standard trim:
Adjustment of Vo with an external voltage
UTR [V] = (Uo – 0.7 Uo nom)/0.42
Adjustment of Vo with an external resistor
Uo increasing: (RTR connected to Vo (+))
RTR - up [k] = 2.4k Uo/(Uo - Uo nom) – 14k
Uo Decreasing: (RTR connected to Vo (-))
RTR - down [k] = 6k Uo/(Uo nom - Uo) – 14k
When the trim pin is left open, the converter
regulates to Uo nom. The input impedance of the trim
pin is equal to the standard trim 20 k
. When
trimming
with
an
external
voltage
source
Uo Set is Uo nom at UTR = Uo nom/1.4 .
Shut Down Feature
The shut down (ON/OFF control, pin 3) is available
with positive logic or with negative logic as an
option. Shut down is referenced to Vi (-).
Positive logic:
Unit off, when pin 3 pulled to Vi (-) or USD <1.5 V
Unit working, when pin 3 open or USD >1.5 V
Negative logic: (Option -N)
Unit off, when pin 3 open or USD >1.5 V
Unit on, when pin3 pulled down to Vi (-)
or USD <1.5 V
The shut down function is TTL compatible. USD
should be kept below 5.5 V. Alternatively an open
collector switch or equivalent can be used. The
remote control pin is pulled up internally, so that no
external voltage source is required. A bipolar
transistor, a FET or an opto coupler output can be
used as a switch.
The user should take care that the shut down
control signal is referenced directly to Vi(-) close to
the converter pins.
Vo (+)
Sense (+)
Trim
Sense (-)
Vo (-)
Open collector
switch
Vi (+)
Vi (-)
ON/OFF
6
4
7
8
5
2
3
1
Input Filter
USD
Figure 34:
Shut down
Shut down is active after a delay of approximately
300
s and has a soft restart after typically
6-10 ms. (see figures 13/16).
The turn on over the shut down function does not
create any inrush current and has a monotonic
form without overshoot. (see figures 22/23).
If the shut down control pin is not used, it can be
left open. With option N the shut down pin must be
hard wired to the Vi(-) pin.
Remote Sense
Remote sense compensates for distribution losses
by regulating the voltage at the remote sense
connections.
Vo (+)
Sense (+)
Trim
Sense (-)
Vo (-)
R Load
Vi (+)
Vi (-)
ON/OFF
6
4
7
8
5
2
3
1
10R
Figure 35:
Remote Sense
The sense pins are internally connected to the
power pins over 10
resistor, to prevent an
uncontrolled output voltage in case of interrupted
sense wires.
To minimize noise pick up, appropriate layout
techniques should be used. The sense wires
should not be wired in loops, but close together. If
possible sense should be placed on top of a layer
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