Datasheet GS30T48-15, GS30T48-12, GS25T48-5 Datasheet (SGS Thomson Microelectronics)

GS25/30T48 Family

25/30 W DC-DC CONVERTER FAMILY

December 1993 1/5

Type V

in

V

out

I

out

GS25T48-5 36 to 72 V 5 V 5 A
GS25T48-12 36 to 72 V 12 V 2,5A
GS25T48-15 36 to 72 V 15 V 2 A

FEATURES

MTBF in excess of 1M hours at +45°C ambient
temperature
Wide inputvoltagerange(36to 72V)
No external componentrequired
High efficiency(see data)
Non latchingpermanent short-circuitprotection
Overvoltageprotection
Redundantoperation
Remoteoutput voltage sense
RemoteINHIBIT/ENABLE
Soft-start
Minimizedreflected input current
Reverseinput polarity protection
Peakinput overvoltage withstand
No derating over the temperaturerange
500V

DC

minimum isolation between input and
output
PCB or chassismountable

DESCRIPTION

The GS25T48-5, GS30T48-12 and GS30T48-15
are isolated DC-DC converters designed for gen­eral purpose application.

The output poweris in the range of 25W to 30W.
To ensure very long life, these converters do not
use electrolytic aluminum capacitors or optoelec­tronic feedbacksystems.

ABSOLUTEMAXIMUM RATINGS

Symbol Parameter Value Unit

V

i

DC Input Voltage

34 to 72V V

V

ipk

Input Transient Overvoltage (t ≤ 1sec.)

90 V

V

ir

Input Reverse Voltage

100 V

T

stg

Storage Temperature Range

-55 to +105 °C

T

op

Operating Temperature Range

-25 to +71 °C

2/5

ELECTRICALCHARACTERISTICS (T

amb

=25°C unlessotherwise specified)

Symbol

Parameter Test Conditions Min Typ Max Unit

V

i

Input Voltage Full Load

36 48 72 V

I

i

Input Current GS25T48-5

Full Load 640 mA

GS30T48-12

Full Load 730

GS30T48-15

Full Load 730

I

ir

Input Reflected
Current

Vi= 48V

Full Load 50 mApp

I

isc

Input Short-circuit
Current

GS25T48-5
Vi= 48V

710 mA

GS30T48-12
Vi= 48V

820

GS30T48-15
Vi= 48V

820

l

iq

Input Quiescent
Current

Vi= 48V
Converter OFF

5mA

V

inhl

Low Inhibit Voltage Vi= 48V

Full Load 1.2 V

V

inhh

High Inhibit Voltage Vi= 48V

Full Load

1.8

(open)

V

l

inh

Input Inhibit Current Vi= 48V

Full Load 1 mA

V

o

Output Voltage

GS25T48-5
Vi= 48V

Full Load

4.95 5.00 5.05

V

GS30T48-12
Vi= 48V

Full Load

11.88 12.00 12.12

GS30T48-15
Vi= 48V

Full Load

14.85 15.00 15.15

V

or

Output Ripple and
Noise Voltage

Vi= 48V
Full Load

10 mVpp

δV

o

Line Regulation

Vi= 36 to 72V
Full Load

±0.001 %

δV

o

Load Regulation

Vi= 48V
Full Load to No Load

±0.05 %

V

oov

Output Overvoltage
Protection

GS25T48-5
Vi= 48V

Full Load 6.8 V

GS30T48-12
Vi= 48V

Full Load 15

GS30T48-15
Vi= 48V

Full Load 18

δVo

Remote Sense per Leg Vi= 36V

0.5 V

Tc

Temperature
Coefficient

Vi= 48V Full Load
Operating Temperature Range

+0.02 %/°C

GS25/30T48 FAMILY

Symbol

Parameter Test Conditions Min Typ Max Unit

I

o

Output Current

GS25T48-5
Vi=36to72V

05A

GS30T48-12
Vi=36to72V

0 2.5

GS30T48-15
Vi=36to72V

02

I

osck

Output Current Limit

GS25T48-5
Vi= 48V

Overload

5.5 A

GS30T48-12
Vi= 48V

Overload

2.75

GS30T48-15
Vi= 48V

Overload

2.2

t

ss

Soft-start Time Vi= 48V

Full Load 30 ms

t

rt

Transient Recovery
Time

Vi= 48V
Step Load Change δIo = 25%

75 µs

V

is

Isolation Voltage

500 Vdc

R

is

Isolation Resistance

10

9

Ω

f

s

Switching Frequency

150 kHz

η

Efficiency

GS25T48-5
Vi= 48V

Full Load

81 %

GS30T48-12
Vi= 48V

Full Load

86

GS30T48-15
Vi= 48V

Full Load

86

R

thc

Thermal Resistance
Case to Ambient

4 °C/W

ELECTRICALCHARACTERISTICS (T

amb

=25°C unlessotherwise specified) (cont’d)

3/5

GS25/30T48 FAMILY

PackageF. Dimensionsin mm. (inches)

CONNECTIONDIAGRAM AND MECHANICAL DATA

4/5

PIN DESCRIPTION

Pin Function Description

1

-IN Negative input voltage.

2

+IN

Positive input voltage. Unregulated input voltage (typically 48V) must be applied between
pins 1-2. The input section of the DC-DC converter isprotected against reverse polarity by
a series diode. No external fuse is required. Input is filtered by a Pi network.

3

ON/OFF

Logically compatible with CMOS or open collector TTL. The converter is ON (Enable)
when the voltage applied to this pin with reference to pin 1 is higher than 1.8V.The
converter is OFF (Inhibit) for a control voltage lower than 1.2V.When the pin is
unconnected the converter is ON (Enable).

4

+ SENSE

Senses the remote load high side. Tobe connected to pin 6 when remote sense is not
used.

5

-SENSE Senses the remote load return. Tobe connected to pin 7 when remote sense is not used.

6

+ OUT Output voltage.

7

-OUT Output voltage return.

GS25/30T48 FAMILY

5/5

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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 otherwiseunder 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 ascritical componentsin life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.

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GS25/30T48 FAMILY