
OK Series
AC-DC Converters 100 Watt
Benign Environment
Edition 2/6.99
2/8
MELCHER
The Power Partners.
Type Key and Product Marking
Type Key
LOK 1 1 4 0 -2 R D
Series .......................................................................... LOK
Number of outputs ........................................................... 1
Output
12 V rectifier version .................................... 3
24 V rectifier version .................................... 6
13.6 V battery charger ............................... 14
27.3 V battery charger ............................... 24
rectifier version .......................................... 01
battery charger ........................................... 40
other voltages or specs. ...................... 02...99
Ambient temperature range
T
A:
–10...50
°C .................................................. -2
Auxiliary functions and options:
Rectangular
U/I output characteristic ......... R 1
Output voltage OK signal ............................ D 2
1 Battery charger versions. Rectifier versions have hiccup mode.
2 Option D only together with feature R
Examples:
LOK 1140-2R: AC-DC converter, battery charger version, providing 13.6 V/3.6 A output
LOK 1601-2: AC-DC converter, rectifier version, providing 24 V/2 A, 48 W output
Produkt Marking
Family designation
Type designation, applicable safety approval and recognition marks, CE mark, specific type designation, input voltage
range, nominal output voltage and current and terminal allocation. Caution remarker.
Label with manufacturing lot no., data code and serial no.
Fig. 1
Block diagram LOK 1301 and LOK 1601, rectifier version
Functional Description
The Convert Simply 50 front end modules are fly back con-
verters with a fixe frequency of 100 kHz. The battery
charger modules LOK 1140-2R and LOK 1240-2R have
a rectangular
U/I output characteristic. The rectifier mod-
ules LOK 1301-2 and LOK 1601-2 have overload protection
working in a hiccup mode.
100
kHz
switching
device
and
control
circuit
Line
filter
and
rectifier
L
Vo+
Vo–
R
03094
Vo+
Vo–
N
2
1
3
4
6
7
9
8
NTC
100
kHz
switching
device
and
control
circuit
Line
filter
and
rectifier
L
Vo+
Vo–
R
03095
Vo+
Vo–
N
2
1
3
4
6
7
9
8
NTC
Fig. 2
Block diagram LOK 1140 and LOK 1240, battery charger
version