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參數(shù)資料
| 型號(hào)： | HV3-2405E-9 |
| 廠商： | Harris Corporation |
| 英文描述： | World-Wide Single Chip Power Supply |
| 中文描述： | 環(huán)球單片電源 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 573K |
| 代理商： | HV3-2405E-9 |
5-23
HV-2405E
R2 = 2.7
, C2 = 330
μ
F)
FIGURE 13. OUTPUT CURRENT vs TEMPERATURE (R1 = 150
,
R2 = 2.7
, C2 = 330
μ
F)
Component List
(Imbedded Supply
≤
30mA)
Fuse
Opens the connection to the power line should the system fail.
Recommended value: 1/4AG
R1 Source Resistor
R1 limits the input current into the HV-2405E. Needs to be
large enough to limit inrush current when C2 is discharged
fully. The maximum inrush current needs to be limited to less
than 2A (Vpeak / R1 < 2A). The equation for power dissipa-
tion in R1 is:
Wirewound resistors are recommended due to their superior
temperature characteristics.
R1 = 150
(
±
10%)
R2 Series Resistor
R2 limits the input current by boosting the voltage on pin 2
sooner in the cycle.
R2 = 2.7
(5%), 1/4W
C1 Snubber Capacitor
C1 and R1 form a low pass filter that limits the voltage rate of
rise across SA1 (the main current carrying SCR of the HV-
2405E) and therefore its power dissipation.
C1 = 0.1
μ
F (
±
10%) AC rated, metallized polyester.
C2 Pre-Regulator Capacitor
C2 is charged once each line cycle. The post regulator sec-
tion of the HV-2405E is powered by C2 for most of the line
cycle. If the application requires a smaller input voltage, the
value of C2 can be reduced from that shown in Figure 7 or
Figure 8 (see section on “Optimizing Design” for details.
Note; capacitors with high ESR may not store enough
Pd = 2.8
25
20
15
10
5
0
0
10
20
30
40
50
60
70
80
90
100
O
OUTPUT CURRENT (mA)
30
+85
o
C
-40
o
C
+25
o
C
IMBEDDED SUPPLY
√
R1 Vrms (I
OUT
)
3
charge to maintain full load current. The voltage rating of C2
should be about 10V greater than the selected V
OUT
.
Recommended value = 330
μ
F electrolytic (
±
20%),unless
otherwise specified.
C3 Inhibit Capacitor
C3 keeps the HV-2405E from turning on during large input
voltage transients.
C3 = 150pF (10%)
C4 Output Filter Capacitor
C4 is required to maintain the stability of the output stage.
Larger values may help in supplying short momentary
current peaks to the load and improves output ripple during
start-up.
C4 = 10
μ
F (
±
20%)
Z1 Output Voltage Adjust
Z1 is used to set the output voltage above the 5V reference
on pin 5 (see section titled “Setting The Output Voltage” for
more details).
Z1 = V
OUT
- 5V,1/4W
Note, the wattage rating is different when configured as a
dual supply (see dual supply section for on how to determine
wattage).
Low Input Voltage Supply
(I
OUT
<50mA)
An ideal application, taking advantage of the low voltage
operation, would be thermostat controls were 28Vrms is sup-
plied via a transformer. In this application the HV-2405E
could deliver a regulated 5V at 40mA with a power dissipa-
tion in R1 (R1= 20
) equal to 530mw. The current limiting
components, in Figure 1, are not required at this low input
voltage level. See Figure 23 and Figure 24 for output vs tem-
perature.
FIGURE 14. LOW INPUT VOLTAGE SUPPLY
1
2
3
4
8
7
6
5
HV-2405E
N
C2
330
μ
F
C3
150pF
C4
10
μ
F
C1
0.1
μ
F
V
OUT
+
-
R1
20
COMPONENT LIST
C2 = 330
μ
F, 15V + V
, ELECTROLYTIC
C3 = 150pF, CERAMIC
C4 = 10
μ
F, V
+ 10V, ELECTROLYTIC
Z1 = V
OUT
-5V, 1/4W
FUSE = 1/ 4A, OPTIONAL
R1 = 20
, 1W
C1 = 0.05
μ
F, AC RATED
Z1
AC
HIGH
AC
RETURN
28Vrms
FUSE
Application Information
(Continued)
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