
TRIPLE OUTPUT EXTERNAL CAPACITOR
O
PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY
.
B4-53
HR40 SERIES
4 WATT
DC/DC C
ONVERTERS
Notes
1. External capacitors required to prevent damage to internal circuitry
(see Table 2 for specifications).
2. Minimum load required on main output for full power auxiliary oper-
ation.
FEEDBACK
LOGIC
TIMING
CONTROL
SWITCH
REF. &
COMP
DUAL
TRACKING
REGULATOR
+5 O9
8
POSITIVE
AUXILIARY
OUTPUT
5
NEGATIVE
AUXILIARY
OUTPUT
OUTPUT
CO6, 7
1, 2
POSITIVE
INPUT
15
INHIBIT
INPUT
CO17, 18
220
μ
F
EXTERNAL
CAPACITOR
Required
Connection
1
Minimum
Capacitor Value2
Model
HR43-2812
and
HR43-2815
Positive 5 VDC Output (9) to
Output Common (6 or 7)
220 μF, 10 V
F
IGURE
2:
T
RIPLE
O
UTPUT
E
XTERNAL
C
APACITOR
C
ONNECTIONS
Table 2 Notes
1. See Figure 2 for connection diagram.
2. Capacitors should be high quality, low ESR components —
solid tantalum is recommended.
T
ABLE
2: E
XTERNAL
C
APACITOR
R
EQUIREMENTS
TRIPLE OUTPUT MODELS
PARAMETER
1
HR43-2812
HR43-2815
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
P
OUT
= 2 W
BALANCED LOAD
MAIN
4.9
5.0
5.1
4.9
5.0
5.1
VDC
AUX
±11.5
±12.0
±12.5
±14.5
±15.0
±15.5
OUTPUT CURRENT
2
18 TO 32 V
IN
MAIN
10.0
—
400
10.0
—
400
mA
AUX
—
—
±50.0
—
—
±40.0
OUTPUT POWER
Tc = –40°C TO +85°C
—
—
3.2
—
—
3.2
W
OUTPUT RIPPLE
BW DC TO 1 MHz
MAIN
—
50
100
—
50
100
mV p-p
± AUX
—
50
100
—
50
100
LINE REGULATION
P
OUT
= 2 W
18 TO 32 V
IN
MAIN
—
5
10
—
5
10
mV
± AUX
—
3
6
—
3
7.5
LOAD REGULATION
NO LOAD TO FULL
MAIN
—
15
30
—
15
30
mV
± AUX
—
15
30
—
12
24
INPUT VOLTAGE
Tc = –40°C TO +85°C
16
28
32
16
28
32
VDC
TRANSIENT 50 ms
—
—
40
—
—
40
V
NO LOAD
—
10
20
—
10
20
INPUT CURRENT
FULL LOAD
—
—
176
—
—
176
mA
INHIBITED
—
—
15
—
—
15
EFFICIENCY
FULL LOAD
68
70
—
68
70
—
%
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
W
ARNING
: E
XTERNAL
C
APACITORS
R
EQUIRED