
Industrial Environment
Switching Regulators, PCB & Chassis
PSC-Family
Edition 2/96 - Melcher AG
4 - 53
MELCHER
The Power Partners.
4.2
PSR: Positive Switching Regulators
PSC-Family
No input to output isolation
Single output of 5.1, 12, 15, 24 or 36 V DC/51...288 W
Input voltage up to 80 V DC
High efficiency up to 96 %
Wide input voltage range
Low input-to-output differential voltage
Very good dynamic properties
Input undervoltage cut-out
External output voltage adjustment and inhibit
Continuous no-load and short-circuit proof
No derating
Safety according to IEC 950
C
Table of Contents
Page
Type Survey .............................................................. 4 - 53
Description ................................................................ 4 - 53
Safety and Installation Instructions ........................... 4 - 54
Standard Features .................................................... 4 - 55
Immunity to Environmental Conditions ...................... 4 - 56
Electromagnetic Compatibility EMC .......................... 4 - 57
Electrical Input and Output Data ............................... 4 - 58
Characteristics and Definitions .................................. 4 - 60
Description of Options ............................................... 4 - 61
Mechanical Data ....................................................... 4 - 63
Type Key and Product Marking ................................. 4 - 63
Type Survey
Table 1: Type survey
Nominal
Input
Nominal
Efficiency
Type
Options
Superseded
output
voltage
input
designation
old type
voltage
current
range
voltage
(phase-out)
Uo nom
Io nom
Ui 1
Ui nom
η
5.1 V
12 A
7...40 V
20 V
83 %
PSC 5A12-7iR
-9, L, P, C, D
PSR 512-7
5.1 V
10 A
8...80 V
40 V
79 %
PSC 5A10-7iR
PSR 510-7
12 V
8 A
15...80 V
90 %
PSC 128-7iR
PSR 128-7
15 V
19...80 V
91 %
PSC 158-7iR
PSR 158-7
24 V
29...80 V
50 V
94 %
PSC 248-7iR
PSR 248-7
36 V
42...80 V
60 V
96 %
PSC 368-7iR
PSR 368-7
1See 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 80 V are specially designed for
secondary switched and battery driven 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.