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參數資料
| 型號： | 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 |
| 文件頁數： | 14/24頁 |
| 文件大小： | 609K |
| 代理商： | ADP3025 |
ADP3025
Rev. A | Page 14 of 24
C14A
10
μ
F
C14B
10
μ
F
D2
10BQ040
L2
6.8
μ
H
R1
130k
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
CS5
FB5
EAN5
EAO5
ADJ/FX5
SS5
SD
CLSET5
BST5
DRVH5
SW5
DRVL5
PGND1
PGND2
INTVCC1
VIN
DRVL3
SW3
DRVH3
BST3
DRV2
FB2
COMP2/SD2
CPOR
PWRGD
REF
AGND
CLSET3
INTVCC2
SYNC
SS3
ADJ/FX3
EAO3
EAN3
FB3
CS3
PFI
PFO
U1
ADP3025
C1
68pF
R10
10k
C18
150pF
C4
33nF
R11
6.2k
C19
330pF
D6
1N4148
C17
100nF
Q5
SI4410
Q4
SI4410
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
D4
10BQ040
C27A
68
μ
F
C27B
68
μ
F
V
5V, 4A
++
D3
10BQ040
C24A
100
μ
F
C24B
100
μ
F
V
3.3V, 4A
++
Q2
SI4410
Q3
SI4410
100nF
C15
4.7
μ
F
C13
1
μ
F
C20A
10
μ
F
C20B
10
μ
F
L1
6.8
μ
H
C26
4.7
μ
F
V
OUT25
2.5V, 1.5A
330pF
R8
25.5k
R7
12k
C11
33
μ
F
R24
200k
R26
34.8k
C12
R12
10k
R13
10k
PWRGD
PFO
R14
4.7
C22
4.7
μ
F
VIN 5.5V–25V
R2
200k
R3
200k
C5
22nF
R4
75k
C8
470pF
C9
68pF
C6
33nF
D5
1N4148
R5
10
C2
330pF
Q1
IRF7403
C28
33pF
R9
C29
C10
47nF
R27
10k
D1
10BQ040
11
0
Figure 17. 45 W, Triple Output DC-to-DC Converter
MAXIMUM OUTPUT CURRENT AND MOSFET SELECTION
The maximum output current for each switching regulator is
limited by sensing the voltage drop between the drain and
source of the high-side MOSFET when it is turned on. A
current sense comparator senses voltage drop between CS5 and
SW5 for the 5 V converter and between CS3 and SW3 for the
3.3 V converter. The sense comparator threshold is 72 mV when
the programming pin CLSET is floating, and 300 mV when
CLSET is connected to ground. Current limiting is based on
sensing the peak current. Peak current varies with input voltage
and depends on the inductor value. The higher the ripple
current or input voltage, the lower the converter maximum
output current at the set current sense amplifier threshold. The
relation between peak and dc output current is given by
×
×
×
V
×
+
=
)
(
)
(
2
MAX
IN
OUT
MAX
L
IN
f
OUT
OU
I
PEAK
I
V
V
V
T
(4)
At a given current comparator threshold,
V
TH
and MOSFET
R
DS(ON)
, the maximum inductor peak current is
)
(
ON
DS
TH
PEAK
I
R
V
=
(5)
Rearranging Equation 2 to solve for
I
OUT(MAX)
gives
×
×
×
V
×
=
)
(
)
(
)
(
)
(
2
MAX
IN
OUT
MAX
L
IN
f
OUT
ON
DS
TH
MAX
OUT
I
V
V
V
R
V
(6)
V
TH
can be chosen to accommodate
I
OUT(MAX)
.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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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