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參數(shù)資料
| 型號： | ADP3166JRU-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller |
| 中文描述： | SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | TSSOP-28 |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 351K |
| 代理商： | ADP3166JRU-REEL |
REV. 0
ADP3166
–19–
Power Circuitry
The switching power path should be routed on the PCB to
encompass the shortest possible length to minimize radiated
switching noise energy (i.e., EMI) and conduction losses in
the board. Failure to take proper precautions often results in
EMI problems for the entire PC system as well as noise-
related operational problems in the power converter control
circuitry. The switching power path is the loop formed by
the current path through the input capacitors and the power
MOSFETs including all interconnecting PCB traces and
planes. The use of short and wide interconnection traces is
especially critical in this path for two reasons: it minimizes
the inductance in the switching loop, which can cause high
energy ringing, and it accommodates the high current
demand with minimal voltage loss.
Whenever a power dissipating component (e.g., a power
MOSFET) is soldered to a PCB, the liberal use of vias, both
directly on the mounting pad and immediately surrounding
it, is recommended. Two important reasons for this are
improved current rating through the vias, and improved
thermal performance from vias extended to the opposite side
of the PCB where a plane can more readily transfer the heat
to the air. Make a mirror image of any pad being used to
heatsink the MOSFETs on the opposite side of the PCB to
achieve the best thermal dissipation to the air around the
board. To further improve thermal performance, the largest
possible pad area should be used.
The output power path should also be routed to encompass
a short distance. The output power path is formed by the
current path through the inductor, the output capacitors,
and the load.
For best EMI containment, a solid power ground plane
should be used as one of the inner layers extending fully
under all the power components.
Signal Circuitry
The output voltage is sensed and regulated between the
FB pin and the FBRTN pin, which connects to the signal
ground at the load. To avoid differential mode noise pickup
in the sensed signal, the loop area should be small. Therefore
the FB and FBRTN traces should be routed adjacent to each
other on top of the power ground plane back to the controller.
The feedback traces from the switch nodes should be con-
nected as close as possible to the inductor. The CSREF
signal should be connected to the output voltage at the
inductor nearest to the controller.
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相關(guān)代理商/技術(shù)參數(shù) |
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| ADP3166JRU-REEL7 | 功能描述:IC REG BUCK 5BIT 2-4PHAS 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
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| ADP3167 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ADP3160/ADP3167: 5-Bit Programmable 2-Phase Synchronous Buck Controller Data Sheet (Rev. B. 5/02) |
| ADP3167JR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADP3167JR-REEL7 | 制造商:Rochester Electronics LLC 功能描述:5BIT PROG'BLE 2 PHASE SYNCRO BUCK CNTRLR - Tape and Reel |
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