H-Family
AC-DC Converters <100 W
Benign Environment
Table 6: Inhibit data
Characteristics
Conditions
min
–50
2.4
–60
typ
max
0.8
50
Unit
Uinh
Inhibit input voltage causing
switched on
switched off
Ui min...Ui max
V DC
output voltage being…
Iinh
Inhibit current
Uinh = 0
–100
–220
µA
Output
Uo nom
Output Response
The reaction of the outputs is similar whether the input volt-
age is applied or the inhibit is switched low.
0.1
0
An output voltage overshoot will not occur when the module
is turned on or off.
t
tr
tf
Ui
1
0
t
t
Inhibit
1
Fig. 7
Output response as a function of input voltage (on/off
switching) or inhibit control
0
Table 7: Output response time
Type of Converter
tr at Po = 0 and tf at Po =Po nom
tr and tf at Po =3/4 Po nom
tr at Po =Po nom
Unit
ms
typ
max
typ
max
typ
max
H1001-2R
H1301-2R
H1501-2R
H1601-2R
H1901-2R
3
5
17
25
3
8
17
30
5
10
15
20
85
25
40
50
70
230
3
17
5
25
8
30
15
50
45
150
35
100
H2320-2
H2540-2
10
8
40
30
15
10
50
40
25
20
80
60
H3020-2
H3040-2
30
20
85
70
45
30
130
90
75
50
210
150
Conditions:
R input not used. For multiple output modules the figures indicated in the table above relate to the output which reacts
slowest. All outputs are resistively loaded. Variation of the input voltage within Ui min...Ui max does not influence the values.
Programmable Voltage (R Input)
or: Between pin 14 and pin 20 (Uo > Uo nom) to achieve
an output voltage adjustment range of approximately
Uo = 100...110% of Uo nom
As a standard feature single output modules offer an ad-
justable output voltage identified by letter R in the type des-
ignation. The control input R (pin 14) accepts either a con-
trol voltage Uext or a resistor Rext to adjust the desired out-
put voltage. When not connected, the control input auto-
matically sets the output voltage to Uo nom.The control input
is protected against external overvoltage up to 8 V max.
(Uo - 2.5 V)
R'ext ≈ 4 kΩ • ––––––––––––––––
2.5 V• (Uo/Uo nom - 1)
For output voltages Uo > Uo nom, the minimum input voltage
according to "Electrical Input Data" increases proportionally
a) Adjustment by means of an external control voltage Uext
between pin 14 (R) and pin 17 (G):
to Uo/Uo nom
.
The control voltage range is 0...2.75 V and allows an
adjustment in the range of approximately
Warning
The value of R'ext should never be less than 47 kΩ to avoid
damage to the unit! R inputs may be parallel connected, but
1/Rtot = 1/R1 + 1/R2 +.... should be considered.
Uo = 0...110% Uo nom
Uo
.
Uext ≈ ––––––– • 2.5 V
Uo nom
Vo1+
Vi+
Vo1+
Vi+
29
2.5 V 4 kΩ
20
20
14
29
2.5 V 4 kΩ
b) Adjustment by means of an external resistor:
Depending upon the value of the required output volt-
age, the resistor shall be connected
either: Between pin 14 and pin 17 (Uo < Uo nom) to
achieve an output voltage adjustment range of approx.
Uo = 0...100% Uo nom
R'ext
R
R
+
14
control
circuit
control
circuit
Uext
Rext
G
–
G
17
23
17
23
Vo1–
Vo1–
Vi–
Vi–
32
32
Uo
Uo nom - Uo
R
ext ≈ 4 kΩ • ––––––––
Fig. 8
Output voltage control by means of the R input
10 - 68
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.