參數(shù)資料
型號： PT4711N
廠商： Texas Instruments, Inc.
英文描述： 45-W Dual-Output Isolated DC/DC Converter
中文描述： 45瓦雙輸出隔離式DC / DC轉(zhuǎn)換器
文件頁數(shù)： 2/13頁
文件大?。?/td> 336K
代理商： PT4711N
For technical support and further information, visit http://power.ti.com
Pin Function
1
+Vin
2
–Vin
3
EN 2
4
EN 1
5
Do Not Connect
6
Do Not Connect
7
Do Not Connect
On/Off Enable Logic
Pin Descriptions
Pin 3
Pin 4
Output Status
×
1
Off
1
0
On
0
×
Off
Notes:
Logic 1 =Open collector
Logic 0 = –Vin (pin 2) potential
For positive Enable function, connect pin 4
to pin 2 and use pin 3.
For negative Enable function, leave pin 3
open and use pin 4.
+Vin:
The positive input supply for the module with
respect to –V
in
. When powering the module from a
–48-V telecom central office supply, this input is
connected to the primary system ground.
–Vin:
The negative input supply for the module, and
the 0-VDC reference for the EN 1, and EN 2 inputs.
When powering the module from a +48-V supply,
this input is connected to the input source return.
EN 1:
The negative logic input that activates the
module output. This pin must be connected to –V
in
to enable the module’s outputs. A high impedance
disables the module’s outputs.
EN 2:
The positive logic input that activates the
module output. If not used, this pin should be left
open circuit. Connecting this input to –V
in
disables
the module’s outputs.
+Vo 1:
This is the positive DC output voltage with
respect to –Vo
1
. The output voltage produced across
±Vo
1
is electrically isolated from ±V
in
and indepen-
dently regulated from that produced at ±Vo
2
. If the
+Vo
1
node is connected to the secondary ground, a
negative output voltage will be produced at –Vo
1
.
–Vo 1:
The negative output supply voltage with
respect to +Vo
1
. If this node is connected to the
secondary ground, a positive voltage is produced at
+Vo
1
.
+Vo 2:
This is the positive DC output voltage with
respect to –Vo
2
. The output voltage produced across
±Vo
2
is electrically isolated from ±V
in
and indepen-
dently regulated from that produced at ±Vo
1
. If +Vo
2
node is connected to the secondary ground, a nega-
tive output voltage will be produced at –Vo
2
.
–Vo 2:
The negative output supply voltage with
respect to +Vo
2
. If this node is connected to the
secondary ground, a positive voltage is produced
at +Vo
2
.
±Vo
1
Adjust:
Using a single resistor, this pin allows
the output voltage produced at ±Vo
1
to be adjusted
higher or lower by up to 10%. If not used this pin
should be left open circuit.
±Vo
2
Adjust:
Using a single resistor, this pin allows
the output voltage produced at ±Vo
2
to be adjusted
higher or lower by up to 10%. If not used this pin
should be left open circuit.
Pin Function
8
Pin Not Present
9
Pin Not Present
10
Pin Not Present
11
Pin Not Present
12
Pin Not Present
13
Pin Not Present
14
+Vo
1
Pin Configuration
Note: Shaded functions indicates those pins that are at primary-side
potential. All other pins are referenced to the secondary.
Pin Function
15
Not Connected
16
–Vo
1
17
Vo
1
Adjust
18
+Vo
2
19
Not Connected
20
–Vo
2
21
Vo
2
Adjust
PT4711—48V
45-W Dual-Output Isolated
DC/DC Converter
SLTS225 APRIL 2004
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