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參數(shù)資料
| 型號(hào)： | ADP3025 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Efficiency Dual Output Power Supply Controller |
| 中文描述： | 高效率雙輸出電源控制器 |
| 文件頁(yè)數(shù)： | 13/24頁(yè) |
| 文件大小： | 609K |
| 代理商： | ADP3025 |
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ADP3025
OUTPUT VOLTAGE ADJUSTMENT
Fixed output voltages (5 V/3.3 V) are selected when ADJ/FX5 =
ADJ/FX3 = 0 V. The output voltage of each controller can also
be set by an external feedback resistor network when
ADJ/FX5 = ADJ/FX3 = 5 V, as shown in Figure 16. There should
be two external feedback resistor dividers for each controller,
one for the voltage feedback loop and one for the output voltage
monitor. Both resistor dividers must be identical. The mini-
mum output voltage is 800 mV, and the maximum output
voltage is 6.0 V.
Rev. A | Page 13 of 24
ADP3025
DRVH
DRVL
FB
ADJ/FX
V
IN
5V
EAN
R1
R2
R3
R4
V
OUT
0
Figure 16. Adjustable Output Mode
The output voltage can be calculated using the following
formula:
1
×
=
R2
R1
V
T
OU
mV
800
(3)
where
R
1/
R
2 =
R3
/
R4
.
If the loop is carefully compensated, R3 and R4 can be removed
and FB and EAN can be tied together.
APPLICATION INFORMATION
A typical application circuit using the ADP3025 is shown in
Figure 17. Although the component values given in Figure 17
are based on a 5 V @ 4 A/3.3 V @ 4 A/2.5 V @ 1.5 A design, the
ADP3025 output drivers are capable of handling output
currents anywhere from <1 A to over 10 A. Throughout this
section, design examples and component values are given for
three different power levels. For simplicity, these levels are
referred to as low power and basic power. Table 5 shows the
input/output specifications for these three levels.
Table 5. Typical Power Level Examples
Input Voltage Range
Switching Output 1
Switching Output 2
Linear Output
INPUT VOLTAGE RANGE
The input voltage range of the ADP3025 is 5.5 V to 25 V. The
converter design is optimized to deliver the best performance
within a 7.5 V to 18 V range, which is the nominal voltage for
three to four cell Li-Ion battery stacks. Voltages above 18 V may
occur under light loads and when the system is powered from
an ac adapter with no battery installed.
Low Power
5.5 V to 25 V
3.3 V/2 A
5 V/2 A
2.5 V/1 A
Basic
5.5 V to 25 V
3.3 V/4 A
5 V/4 A
2.5 V/1.5 A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADP3025JRU | 制造商:Analog Devices 功能描述:DC DC CNTRLR DUAL-OUT SYNC BUCK 5.5V TO 25V 38TSSOP - Bulk |
| ADP3025JRU-REEL | 制造商:Analog Devices 功能描述:DC DC Cntrlr Dual-OUT Sync Buck 5.5V to 25V Input 38-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:TRIPLE OUTPUT SYNCHRONOUS BUCK CNTLR - Tape and Reel |
| ADP3025JRUZ-REEL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADP3026 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High-Efficiency Notebook Computer Power Supply Controller |
| ADP3026ARU | 制造商:AD 制造商全稱:Analog Devices 功能描述:High-Efficiency Notebook Computer Power Supply Controller |
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