PSC-Family
Switching Regulators, PCB & Chassis
Rugged Environment
4 - 22
Edition 2/96 - Melcher AG
MELCHER
The Power Partners.
4.1
No input to output isolation
Single output of 12, 15, 24, 36 or 48 V DC/72...288 W
Input voltage up to 144 V DC
High efficiency up to 96%
Extremely wide input voltage range
Very good dynamic properties
Input undervoltage cut-out
External output voltage adjustment and inhibit
Two temperature ranges
Continuous no-load and short-circuit proof
No derating
Table of Contents
Page
Type Survey .............................................................. 4 - 22
Description ................................................................ 4 - 22
Safety and Installation Instructions ........................... 4 - 23
Standard Features .................................................... 4 - 24
Immunity to Environmental Conditions ...................... 4 - 25
Electromagnetic Compatibility EMC .......................... 4 - 26
Characteristics and Definitions .................................. 4 - 27
Electrical Input and Output Data ............................... 4 - 28
Description of Options ............................................... 4 - 30
Mechanical Data ....................................................... 4 - 32
Type Key and Product Marking ................................. 4 - 32
Safety according to IEC 950
C
PSR: Positive Switching Regulators
PSC-Family
Type Survey
Table 1: Type survey
Nominal
Input
Nominal
Efficiency
Type
Options
output
voltage
input
designation
voltage
current
range
voltage
Uo nom
Io nom
Ui 1
Ui nom
η
12 V
6 A
18...144 V
60 V
89%
PSC 126-7iR
-9, L, P, C, D
15 V
22...144 V
90%
PSC 156-7iR
24 V
31...144 V
94%
PSC 246-7iR
36 V
44...144 V
80 V
95%
PSC 366-7iR
48 V
58...144 V
96%
PSC 486-7iR
1 Surges up to 156 V for 2 sec. See data
Uio min (min. differential voltage Ui – Uo)
Description
The PSC family of positive swiching regulators is designed
as power supply modules for electronic systems. Their ma-
jor advantages include a high level of efficiency that re-
mains virtually constant over the entire input range, high
reliability, low ripple and excellent dynamic response.
Modules with input up to 144 V are specially designed for
battery driven mobile applications.
Case C03: Aluminium, black finish and self cooling.
External input circuitry
An external capacitor (see "Application Notes") is required
in rectifier mode and in DC operation mode only, if the sum
of the lengths of the two input lines between source and in-
put (without option L) is greater than approx. 5 m. For long
connection lines the use of option L is recommended in or-
der to reduce superimposed interference voltages or cur-
rents and to prevent oscillation.