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參數資料
| 型號： | ADP3025JRU-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩壓器 |
| 英文描述： | High Efficiency Dual Output Power Supply Controller |
| 中文描述： | DUAL SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO38 |
| 封裝： | MO-153BD-1, TSSOP-36 |
| 文件頁數： | 15/24頁 |
| 文件大小： | 609K |
| 代理商： | ADP3025JRU-REEL |
ADP3025
This current limit circuit is designed to protect against high
current or short-circuit conditions only. This protects the IC
and MOSFETs long enough to allow the output undervoltage
protection circuitry to latch off the supply.
Rev. A | Page 15 of 24
NOMINAL INDUCTOR VALUE
Inductor design is based on the assumption that the inductor
ripple current is 30% of the maximum output dc current at a
nominal 12 V input voltage. The inductor ripple current and
inductance values are not critical, but are important in analyz-
ing the trade-offs between cost, size, efficiency, and volume. The
higher the ripple current, the lower the inductor size and
volume. However, this leads to higher ac losses in the windings.
Conversely, a higher inductor value means lower ripple current
and smaller output filter capacitors, as well as slower transient
response.
The inductor design should be based on the maximum output
current plus 15% ( of the 30% ripple allowance) at the
nominal input voltage:
(
)
)
(
)
(
)
(
3
NOM
IN
MAX
OUT
I
OUT
OUT
NOM
IN
V
f
V
V
V
L
×
×
×
×
≥
(7)
Optimum standard inductor values for various output voltage
and current levels are shown in Table 6.
Table 6. Standard Inductor Values
Frequency (kHz)
200
300
INDUCTOR SELECTION
Once the value for the inductor is known, there are two ways to
proceed: design the inductor in-house or buy the closest induc-
tor that meets the overall design goals.
Standard Inductors
Buying a standard inductor provides the fastest, easiest solution.
Many companies offer suitable power inductor solutions. A list
of power inductor manufacturers is given in Table 7.
3.3 V/2 A 3.3 V/4 A
20 μH
12 μH
5 V/2 A
22 μH
15 μH
5 V/4 A
10 μH
8.2 μH
8.2 μH
6.8 μH
Table 7. Recommended Inductor Manufacturers
Coilcraft
Phone: 847/639-6400
Fax: 847/639-1469
Web: www.coilcraft.com
SMT Power Inductors,
Series 1608, 3308, 3316, 5022, 5022HC, DO3340,
Low Cost Solution
SMT Shielded Power Inductors
Series DS5022, DS3316, DT3316,
Best for Low EMI/RFI
Power Inductors and Chokes,
Series DC1012, PCV-0, PCV-1, PCV-2, PCH-27, PCH-45,
Low Cost
Coiltronics
Phone: 561/241-7876
Fax: 561/241-9339
Web: www.coiltronics.com
SMT Power Inductors,
Series UNI-PAC2, UNI-PAC3 and UNI-PAC4,
Low Cost Solution
SMT Power Inductors,
Series, ECONO-PAC, VERSA-PAC,
Best for Low Profile or Flexible Design
Power Inductors CTX Series,
Low EMI/RFI, Low Cost Toroidal Inductors but not
Miniature
Murata Electronics
North America, Inc.
Phone: 770/436-1300
Fax: 770/436-3030
Web: www.murata.com
SMT Power Inductors,
Series LQT2535.
Best for Low EMI/RFI
Chip Inductors
LQN6C, LQS66C
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| ADP3026JRUZ-REEL | 制造商:Rochester Electronics LLC 功能描述:DUAL OUTPUT SYNCHRNOUS BUCK CONTROLLER - Tape and Reel 制造商:Analog Devices 功能描述: |
| ADP3031 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2 MHz PWM Boost Switching Regulator |
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