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參數(shù)資料
| 型號： | AFL2705DZ/HBPBF |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | HERMETIC SEALED PACKAGE-12 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 117K |
| 代理商： | AFL2705DZ/HBPBF |
8
www.irf.com
AFL270XXD Series
Figure V. Connection for V
OUT
Adjustment
Input Filter
Undervoltage Lockout
The AFL270XXD series converters incorporate a single
stage LC input filter whose elements dominate the input
load impedance characteristic during the turn-on sequence.
The input circuit is as shown in Figure IV.
Figure IV. Input Filter Circuit
A minimum voltage is required at the input of the converter
to initiate operation. This voltage is set to 150
±
5 volts. To
preclude the possibility of noise or other variations at the
input falsely initiating and halting converter operation, a hys-
teresis of approximately 10 volts is incorporated in this cir-
cuit. Thus if the input voltage droops to 140
±
5 volts, the
converter will shut down and remain inoperative until the
input voltage returns to
≈
150 volts.
Output Voltage Adjust
Connect R
adj
to + to increase, - to decrease
By use of the trim pin (10), the magnitude of output voltages
can be adjusted over a limited range in either a positive or
negative direction. Connecting a resistor between the trim
pin and either the output return or the positive output will
raise or lower the magnitude of output voltages. The span
of output voltage adjustment is restricted to the limits shown
in Table I.
Table 1. Output Voltage Trim Values and Limits
Note that the nominal magnitude of output voltage resides in
the middle of the table and the corresponding resistor value
is set to
∞
.
To set the magnitude greater than nominal, the
adjust resistor is connected to output return. To set the
magnitude less than nominal, the adjust resistor is con-
nected to the positive output. (Refer to Figure V.)
For output voltage settings that are within the limits, but
between those listed in Table I, it is suggested that the
resistor values be determined empirically by selection or by
use of a variable resistor. The value thus determined can
then be replaced with a good quality fixed resistor for per-
manent installation.
When use of this adjust feature is elected, the user should
be aware that the temperature performance of the con-
verter output voltage will be affected by the temperature
performance of the resistor selected as the adjustment
element and therefore, is advised to employ resistors with a
tight temperature coefficient of resistance.
8.4μH
Pin 1
Pin 2
0.54μfd
AFL27005D
AFL27012D
AFL27015D
V
out
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.583
R
adj
0
12.5K
33.3K
75K
200K
∞
190K
65K
23K
2.5K
0
V
out
12.5
12.4
12.3
12.2
12.1
12.0
11.7
11.3
10.8
10.6
10.417
R
adj
0
47.5K
127K
285K
760K
∞
975K
288K
72.9K
29.9K
0
V
out
15.5
15.4
15.3
15.2
15.1
15.0
14.6
14.0
13.5
13.0
12.917
R
adj
0
62.5K
167K
375K
1.0M
∞
1.2M
325K
117K
12.5K
0
Enable 2
Share
Trim
- Vout
Return
+ Vout
To
Loads
R
ADJ
AFL270xxD
7
12
+
-
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AFL5012DX | DC to DC Converter |
| AFL5012DY | DC to DC Converter |
| AFL5012DZ | DC to DC Converter |
| AFL5012S | Hi-Rel DC-DC Standard Single Converter in a AFL package |
| AFL5012SW | DC to DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AFL270XXD | 制造商:IRF 制造商全稱:International Rectifier 功能描述:ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS |
| AFL270XXS | 制造商:IRF 制造商全稱:International Rectifier 功能描述:270V Input, Single Output |
| AFL2803.3DW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| AFL2803.3DW/CH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| AFL2803.3DW/ES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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