Lucent Technologies Inc.
3
Data Sheet
January 2000
36 Vdc to 75 Vdc Inputs; 20 W
LW020 Single-Output-Series Power Modules:
Electrical Specications (continued)
Table 2. Output Specications
Parameter
Device
Symbol
Min
Typ
Max
Unit
Output Voltage Set Point
(VI = 48 V; IO = IO, max; TC = 25
°C)
LW020G
LW020F
LW020A
LW020B
LW020C
VO, set
2.46
3.25
4.92
11.81
14.76
2.5
3.3
5.0
12.0
15.0
2.54
3.35
5.08
12.19
15.24
Vdc
Output Voltage
(Over all line, load, and temperature
conditions until end of life; see Figure
13.)LW020G
LW020F
LW020A
LW020B
LW020C
VO
2.4
3.20
4.85
11.64
14.55
—
2.6
3.40
5.15
12.36
15.45
Vdc
Output Regulation:
Line (VI = 36 V to 75 V)
Load (IO = IO, min to IO, max)
Temperature (TC = –40
°C to +100 °C)
All
—
0.01
0.05
0.5
0.1
0.2
1.0
%VO
Output Ripple and Noise Voltage
RMS
Peak-to-peak (5 Hz to 20 MHz)
LW020A, F, G
LW020B, C
LW020A, F, G
LW020B, C
—
20
50
20
50
100
150
mVrms
mVp-p
Output Current
(At IO < IO, min, the modules may exceed
output ripple specications.)
LW020A, F, G
LW020B
LW020C
IO
0.4
0.17
0.13
—
4.0
1.67
1.33
A
Output Current-limit Inception
(VO = 90% x VO, set; see Figure 2.) All
IO
103
—
150
%IO, max
Output Short-circuit Current
(VO = 250 mV)
LW020C
LW020B
LW020A, F, G
IO
—
150
250
220
200
%IO, max
Efciency
(VI, nom; IO = IO, max; TC = 25
°C; see Figures
LW020G
LW020F
LW020A
LW020B
LW020C
η
71
74
77
82
75
77
81
85
—
%
Switching Frequency
All
—
256
—
kHz
Dynamic Response
(
IO/t = 1 A/10 s, VI = VI, nom, TA = 25 °C):
Load Change from IO = 50% to 75% of
IO, max:
Peak Deviation
Settling Time (VO < 10% peak
deviation)
Load Change from IO = 50% to 25% of
IO, max:
Peak Deviation
Settling Time (VO < 10% peak
deviation)
All
—
2
1.0
2
1.0
—
%VO, set
ms
%VO, set
ms