FEATURES

Uko INTERFACE (DC) and MAINS (AC) inputs
to enable NPM (Normal Power Mode) and
RPM (Restricted Power Mode) CONDITIONS

INPUT FILTER TO MEET EMI requirements

PEAK INPUT OVERVOLTAGE WITHSTAND-
ING

AC INPUT PROTECTION FUSE

INPUTS TO OUTPUTS INSULATION

2 INSULATED OUTPUTS:

Vo1=5 V for NT1 logics
Vo2=40 V for "S" interface

AUXILIARY LOGIC OUTPUT TTL-COMPAT-
IBLE for LED & NPM/RPM MODE indication.

PS1 and PS2 output TTL-compatible

INTERNAL RELAY FUNCTION FOR Vo2 PO-
LARITY REVERSE

U-INTERFACE ACCORDING TO ETR080

"S" INTERFACE OUTPUT CHARAC-
TERISTICS:

- Peak output of 220 mA for 150 ms
- Typical output power 4,5 W
- Output filtering to meet ETSI requirements
- Hold up time: 20 ms with 4,5 W output power
- Continuous short circuit protection
- Peak overvoltage withstand:1KV for 10/700 us
transversal

S-INTERFACE ACCORDING TO ETS 300
012

MTBF: 300 Kh, according to MIL HDBK 217-F

Operating Temperature: -10 to +70

May 2001

�

PRODUCT VIEW

ORDERING NUMBER: GS-COMBI/E1-I

COMBI/E1-I

Power Management Module for

ISDN NT1

SPECIFICATION Rev. 02

Type

COMBI/E1-I

195 to 253 Vac
and
28 to 115 Vdc

out1: 5 V

80 mA

out 2: 40V

120 mA

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DESCRIPTION

The NT1 Power Management Module COMBI/E1-
I is a comprehensive solution for ISDN-NT1 (Net-
work Termination Basic Access NTBA) equip-
ment, combining both AC-DC and DC-DC
functions.

The GS-COMBI/E1-I provide the NTBA with all
necessary supply voltages as well as control sig-
nals to operate in the different operating modes,
typically the Normal Power Mode (NPM) and Re-
stricted Power Mode (RPM).

Connected to the main, Input 1 (2 poles AC con-
nector) is the AC input power to the COMBI/E1-I,
source of the whole necessary power in normal
operating mode, namely in NPM. Input 2 is the
DC power source when in RPM, therefore to con-
nect to the U-INTERFACE.

The device supply 5V (out 1) for logics and 40 V
(out 2) for the S interface both in Normal Power
Mode (NPM) and in Restricted Power Mode
(RPM).

RPM mode is the emergency condition that oc-
curs if the mains (AC) input is not available. An
internal "relay function" is available to reverse the
40 V output polarity. A third auxiliary output can
be used for LEDs driving and RPM/NPM mode
acknowledge (Logic output).

The Logic output becomes high (+5V) when in
NPM condition.

PS1 and PS2 signal overload at the S-interface
(PS1 in NPM and PS2 in RPM)

The converter offers short-circuit protection on
both outputs: particularly, short-circuit on 40V out-
put doesn't affect the +5V output.

Out 1, out 2... out 5 share the same common re-
turn.

3000 VRMS insulation voltage for 60 seconds (re-
inforced insulation) is provided among input 1
and all outputs. Same reinforced insulation is also
provided between Input 1 and Input 2.

2000 VRMS / 1 min. reinforced insulation is pro-
vided between input 2 and all outputs.

When in NPM mode (AC main supply), the mod-
ule max. power consumption is <15 VA (apparent
power).

Input 2 undervoltage lockout offers high imped-
ance in order to have 10 uA max input current
when Vi2 is <18 Volts.

The design of the module has been conducted
using the following reference standards:

EN 60950, VDE0878 part 1 class B (EMC),
EN55022 class B (emission), EN50 082-1 (immu-
nity) ITU-T I.430, ETS 300 012 and ETR 080 and
ETS300 047 (ISDN BASIC ACCESS, Safety and
Protection); anyway, please note that no certifica-
tion processes have been carried out on the mod-
ule itself.

COMBI/E1-I

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ELECTRICAL CHARACTERISTICS when in NPM (Tamb=25

C, unless otherwise specified.)

NPM Standard Condition: Vin1 = 195 to 253 Vrms Vin2 = 28 to 115 Vdc

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Vi1

Input Voltage 1

195

253

VRMS

Vi2

Input Voltage 2

any polarity

115

Vdc

Vi1 Input Frequency

Vi1 = 230 VRMS

Vi1st

Start up Input 1 voltage

Output parameters as per NPM
Standard Conditions

185

VRMS

Vi2st

Start up Input 2 voltage

Output parameters as per Standards
Conditions

Vdc

Vo1

Output Voltage 1

Standard conditions

4.75

5.25

Vo2

Output Voltage 2

Standard conditions

Vo3

Output Voltage 3

Standard conditions, Io3=0.9 to 3mA

4.5

5.25

Vo4

Output Voltage 4

Vo2 > 34 v (normal load)

4.75

5.25

(PS 2)

Vo2 < 24v (overload)

4.75

5.25

Vo5

Output Voltage 5

Vo2> 34v (normal load)

4.75

5.25

(PS 1)

Vo2 < 24v (overload)

0.8

Vor1

Output Ripple voltage 1

Standard conditions BW: 0-20 MHz

mVrms

Vor2

Output Ripple voltage 2

Standard conditions BW: 0-20 MHz

100

mVrms

Io1

Output Current 1

Standard conditions

Io2

Output Current 2

Standard conditions

120

Ioc2

Output Overcurrent 2

t=150ms, Vo1=34 to 42 V

220

240

260

Io2sc

Output 2 short circuit current

Continuous short circuit

Vi1th

NPM => RPM mode Vi1
threshold

Output parameters as per Standard
Conditions

160

Vrms

Ttr

Transition time

transition NPM => RPM and vice versa

Vi1pk

Input 1 Transient overvoltage

t = 8/20 us transversal

Vi2pk

Input 2 Transient overvoltage

t= 10/700 us transversal

500

Vo2pk

Output 1 Transient overvoltage

t = 10/700 us transversal

1000

Pi1r

Input 1 Real Power

NPM standard conditions

Pi1

Input 1 Apparent Power

NPM standard conditions

Vist

Insulation Voltage, pulse

INputs to outputs t=10/700 us (pulse)

Hold-up time

Vin=195 VRMS Pout 1:0 to 340 mW
Pout 2: 4.5 W

COMBI/E1-I

3/6

ELECTRICAL CHARACTERISTICS when in RPM (Tamb=25

C, unless otherwise specified.)

RPM Standard Condition: Vin1 < 100 Vrms Vin2 = 28 to 115 Vdc

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Vi1

Input Voltage 1

100

Vrms

Vi2

Input Voltage 2

any polarity

115

Vdc

Vi2st

Start Up Input 2 Voltage

Vdc

Vo1

Output Voltage 1

RPM Standard Conditions

4.75

5.25

Vo2

Output Voltage 2

RPM Standard Conditions

Vo3

Output Voltage 3

RPM Standard conditions, out 3 load=50
kOhm

0.8

Vo4

Output Voltage 4

Vo2 > 34v (normal load)

4.75

5.25

(PS 2)

Vo2 < 24v (overload)

0.8

Vo5

Output Voltage 5

Vo2 > 34v (normal load)

0.8

(PS 1)

Vo2 < 24v (overload)

0.8

Vor1

Output Ripple Voltage 1

RPM Standard Conditions BW:0-20 Mhz

mVrms

Vor2

Output Ripple Voltage 2

RPM Standard Conditions BW:0-20 Mhz

100

mVrms

Io1

Output Current 1

RPM Standard Conditions

Io2

Output Current 2

RPM Standard Conditions

12.5

Io2sc

Output 2 short circuit current

Continuous short circuit

13.5

Vi1th

RPM=>NPM mode Vi1
threshold

185

VRMS

Ttr

Transition time

transition NPM => RPM and vice versa

Vi1pk

Input 1 Transient overvoltage

t = 8/20 us transversal

2.0

COMBI/E1-I

4/6

Электронный компонент: COMBI/E1-I