GS1T70-D540 [STMICROELECTRONICS]
ISDN DC-DC CONVERTER; ISDN的DC -DC转换器
| 型号： | GS1T70-D540 |
| 厂家： | 
ST |
| 描述： | ISDN DC-DC CONVERTER |
| 文件： | 总5页 (文件大小：74K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
GS1T70-D540/2
ISDN DC-DC CONVERTER
PRELIMINARY DATA
Type
V
i
V
o
I
o
out 1 : 5V 72 mA
out 2 : 40V 12 mA
GS1T70-D540/2 28 to 115 V
FEATURES
Wide operating line termination voltage
Positive or negative input voltage polarity
Input and output filtering
Short-circuit protection on both outputs
Input power during shortcircuit within specifica-
tion
Minimum current drain during stand-by condition:
10µA for Vi<18V
Input-Output2 insulation voltage: 3000VRMS for
60 seconds
Output1-Output2 insulation voltage: 3000VRMS
for 60 seconds
Mechanical dimensions (L x W x H): 50.8 mm x
50.8 mm x 18 mm (2" x 2" x 0.71")
DESCRIPTION
In addition, the wide operating input voltage range
allows it to operate within the whole range of LT
(Line Termination) battery voltage and its relevant
line resistance.
The GS1T70-D540/2 converter has been designed
for the “U” interface of an ISDN-NTBA (Network
Termination Basic Access) system with either 4B3T
or 2B1Q standard trasmission.
3000V
isolation voltage for 60 second is pro-
RMS
vided between input to output 2 and between output
1 and output 2. No insulation is provided between
input and output 1.
Two outputs, 5V/72mA and 40V/12mA are sup-
plied.
The converter offers short-circuit protection (short-
circuit on 40V output doesn’t affect 5V output and
the input power never exceeds the limits of the
specification), input either voltage polarity, 80%
minimum efficiency at maximum load, input and
output filtering to meet very stringent noise require-
ments.
The design of the module has been conducted
using, as reference standards, the following:
EN 60950, VDE0878 part 1 class B (EMC),
EN55022 class B (EMC), CCITT 430, ETS 300 012
and ETS 300 047 (ISDN BASIC ACCESS, Safety
and Protection); anyway, please note that no certi-
fication processes have been carried out on the
module itself.
When the input voltage is below 18V, the converter
offers a very high input impedance and a maximum
quiescentcurrent of10µAaccording to thestandard
ETR 080.
20 January 1997
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GS1T70-D540/2
ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified)
Std. Conditions:
Line Termination voltage: 47 to 71V
87 to 115V
Line Resistance (Rs): 0 to 600 Ω
550 to 1400 Ω
Parameter
Input Voltage
Test Conditions
Std. Conditions
Min
28
Typ
Max
115
44
Unit
V
Symbol
V
i
Start Up Input
Voltage
V
ist
See fig. 3
28
V
Output Voltage 1
Output Voltage 2
Std. Conditions
Std. Conditions
V
V
4.75
34
5
5.25
42
V
V
o1
40
o2
Output Ripple
Voltage 1
Std. Conditions
V
or1
5
20
30
72
mVpp
mVpp
mA
BW = 0 to 20MHz
Output Ripple
Voltage 2
Std. Conditions
BW = 0 to 20MHz
V
or2
o1
10
Std. Conditions
Output Current 1
I
2
0
P
o2
= 410 mW V = 5V
o1
Std. Conditions
Vo1 = 4.75 to 5.25V
Vo2 = 34 to 42 V
Output Power 2
P
420
mW
o2
Std. Conditions
Io1 = 2 to 72 mA
o2
Max Output Current 2
I
12
9.8
mA
mA
o2max
V
= 34 to 40V
Output 2 Short
Circuit Current
Std. Conditions
Output Shorted (Indefinite time)
I
osc2
Input to Output 2
Output 1 to Output 2 (*)
f = 50 Hz
Insulation Voltage
V
is
3000
V
RMS
Mean Time Before Failure
Ground Fixed
MTBF
1
Mhours
Operating Ambient
Temperature Range
T
-20
+70
+85
°C
op
Storage
Temperature Range
T
stg
- 40
°C
(*) no insulation is provided between input and output 1
OUTPUT POWER CHARACTERISTICS
LT (Line Termination Voltage) = 47V to 71V
Rs (Line Resistance) = 0 to 600 Ω
LT (Line Termination Voltage) = 87V to 99V
Rs (Line Resistance) = 550 to 1400 Ω
Max
Input
Power
(mW)
Min
Min
Max
Input
Power
Min
Min
Output
Power 1
Output
Power 2
Output
Output
NT Status
NT Status
Power 1
(5V)[mW] (40V)[mW]
Power 2
(5V)[mW] (40V)[mW] (mW)
450
950 (*)
90
Activated
320
320
40
0
410
0
450
950
90
Activated
320
320
40
0
410
0
Activated Emergency
Deactivated
Activated Emergency
Deactivated
180
Deactivated Emergency
40
45
180
Deactivated Emergency
40
45
Activated with 40 V
Short circuit
Short
circuit
Activated with 40V
Short circuit
Short
circuit
1050 (*)
320
1050
320
N.B.: with the following output loads:
P 1 (5V) : 15 mW and P 2 (40 V) : 410 mW , maintained for a time t > 2s, V 2 = 34 to 42 V
o
o
o
(*) Note: the values indicated are subordinated to the available input power
2/5
20 January 1997
GS1T70-D540/2
Figure 1. Connection diagram and mechanical data
18.0 (0.71)
50.8 (2.00)
O 1 (0.04)
3
5.08 (0.2)
Bottom view
4
10.16 (0.4)
5.08 (0.2)
1.27
(0.05)
5
50.8
(2.00)
6
10.16 (0.4)
7.62 (0.3)
2
1
21.59 (0.85)
19.05 (0.75)
3.0 (1.18)
Package V. Dimensions in mm (inches).
PIN DESCRIPTION
Figure 2. Galvanic insulation barrier
Pin
1
Description
Input (either polarity)
Input (either polarity)
+5V Output
Galvanic
insulation
barrier
out 1
5V
2
3
4
Return for +5V Output
+40V Output
out 2
40V
5
6
Return for +40 V Output
GALVANIC INSULATION
INPUT
Galvanic insulation (3000 V for 60 s as specified in
EN60950) is provided between the input and the
output 1 (40 V output for the "S" interface).
No insulation is provided between input and output
2 (+5 V for logics put on NT1 board). See figure 2.
3000 V RMS
20 January 1997
3/5
GS1T70-D540/2
Figure 3. Voltage Supply operating area
Vin
Input Voltage
Voltage Supply Operating Area
Input current < 10 µA Area
115 V
28-44 V
28 V
18 V
0 V
t > 1 ms
t
t >1 s
VOLTAGE SUPPLY OPERATING AREA
One second after U-interface disconnection, and if
the input voltage remains below 18V, the maximum
quiescent input current value remains below than
10µA.
Figure 3 shows the Voltage Supply Operating area
during a switching OFF-ON sequence.The start-up
voltage is 44V maximum.
Figure 4. Typical application example
3
+
1
2
GS5AC-40
40 V
Led
4
5
-
+
1
Relay/Led
Mains
input
GS1T70-D540/2
6
-
2
AC/DC converter
5
+
40 V
6
-
3
+
Relay
5 V
4
DC/DC converter
-
So
Uo
"U"
"S"
interf.
interf.
NT1 board
4/5
20 January 1997
GS1T70-D540/2
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
© 1997 SGS-THOMSON Microelectronics – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - China - Canada - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
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20 January 1997
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