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参数资料
| 型号： | AFL27005DX/CHPBF |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 10/11页 |
| 文件大小： | 180K |
| 代理商： | AFL27005DX/CHPBF |
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 150V
± 5.0V. To
preclude the possibility of noise or other variations at the
input falsely initiating and halting converter operation, a
hysteresis of approximately 10V is incorporated in this circuit.
Thus if the input voltage droops to 140V
± 5.0V, the converter
will shut down and remain inoperative until the input voltage
returns to
≈ 150V.
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 connected
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
permanent installation.
When use of this adjust feature is elected, the user should
be aware that the temperature performance of the converter
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.
8.4H
Pin 1
Pin 2
0.54fd
AFL27005D
AFL27012D
AFL27015D
V
out
R
adj
V
out
R
adj
V
out
R
adj
5.5
0
12.5
0
15.5
0
5.4
12.5K
12.4
47.5K
15.4
62.5K
5.3
33.3K
12.3
127K
15.3
167K
5.2
75K
12.2
285K
15.2
375K
5.1
200K
12.1
760K
15.1
1.0M
5.0
∞
12.0
∞
15.0
∞
4.9
190K
11.7
975K
14.6
1.2M
4.8
65K
11.3
288K
14.0
325K
4.7
23K
10.8
72.9K
13.5
117K
4.6
2.5K
10.6
29.9K
13.0
12.5K
4.583
0
10.417
0
12.917
0
Enable 2
Share
Trim
- Vout
Return
+ Vout
To
Loads
R
ADJ
AFL270xxD
7
12
+
-
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AFL27005DX-ES | 制造商:IRF 制造商全称:International Rectifier 功能描述:ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS |
| AFL27005DXHB | 制造商:IRF 制造商全称:International Rectifier 功能描述:270V Input, Single Output |
| AFL27005DX-HB | 制造商:IRF 制造商全称:International Rectifier 功能描述:ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS |
| AFL27005DY | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, MINIMUM SCREENING - Bulk |
| AFL27005DY/CH | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, CLASS H - Bulk |
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