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參數(shù)資料
| 型號： | ISL8102CRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
| 中文描述： | SWITCHING CONTROLLER, PQCC32 |
| 封裝： | 5 X 5 MM, ROHS COMPLIANT, PLASTIC, MO-220VHHD-2, MLFP-32 |
| 文件頁數(shù)： | 25/27頁 |
| 文件大?。?/td> | 711K |
| 代理商： | ISL8102CRZ |
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25
FN9247.0
October 19, 2005
switched current path generates a large voltage spike during
the switching interval. Careful component selection, tight
layout of the critical components, and short, wide circuit
traces minimize the magnitude of voltage spikes.
There are two sets of critical components in a DC/DC
converter using a ISL8102 controller. The power-
components are the most critical because they switch large
amounts of energy. Next are small signal components that
connect to sensitive nodes or supply critical bypassing
current and signal coupling.
It is important to have a symmetrical layout, preferably with
the controller equidistantly located from the two power trains it
controls. Equally important are the gate drive lines (UGATE,
LGATE, PHASE): since they drive the power train MOSFETs
using short, high current pulses, it is important to size them as
large and as short as possible to reduce their overall
impedance and inductance. Extra care should be given to the
LGATE traces in particular since keeping the impedance and
inductance of these traces helps to significantly reduce the
possibility of shoot-through. Equidistant placement of the
controller to the two power trains also helps keeping these
traces equally short (equal impedances, resulting in similar
driving of both sets of MOSFETs).
The power components should be placed first. Locate the input
capacitors close to the power switches. Minimize the length of
the connections between the input capacitors, C
IN
, and the
power switches. Locate the output inductors and output
capacitors between the MOSFETs and the load. Locate the
high-frequency decoupling capacitors (ceramic) as close as
practicable to the decoupling target, making use of the shortest
connection paths to any internal planes, such as vias to GND
immediately next, or even onto the capacitor solder pad.
The critical small components include the bypass capacitors
for VCC and PVCC. Locate the bypass capacitors, CBP,
close to the device. It is especially important to locate the
components associated with the feedback circuit close to
their respective controller pins, since they belong to a high-
impedance circuit loop, sensitive to EMI pick-up. It is also
important to place current sense components close to their
respective pins on the ISL8102, including the RISEN
resistors, RS, RCOMP, CCOMP. For proper current sharing
route two separate symmetrical as possible traces from the
corresponding phase node for each RISEN.
A multi-layer printed circuit board is recommended. Figure 27
shows the connections of the critical components for the
converter. Note that capacitors C
xxIN
and C
xxOUT
could each
represent numerous physical capacitors. Dedicate one solid
layer, usually the one underneath the component side of the
board, for a ground plane and make all critical component
ground connections with vias to this layer. Dedicate another
solid layer as a power plane and break this plane into smaller
islands of common voltage levels. Keep the metal runs from
the PHASE terminal to inductor L
OUT
short. The power plane
should support the input power and output power nodes. Use
copper filled polygons on the top and bottom circuit layers for
the phase nodes. Use the remaining printed circuit layers for
small signal wiring. The wiring traces from the IC to the
MOSFETs’ gates and sources should be sized to carry at least
one ampere of current (0.02” to 0.05”).
ISL8102
相關PDF資料 |
PDF描述 |
|---|---|
| ISL8102CRZ-T | Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
| ISL8102IRZ | Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
| ISL8102IRZ-T | Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
| ISL8102 | Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
| ISL8102EVAL1 | Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL8102CRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ISL8102EVAL1 | 功能描述:EVAL BOARD 1 FOR ISL8102 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:* 標準包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓撲結構:降壓 頻率 - 開關:250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| ISL8102IRZ | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF) |
| ISL8102IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF) |
| ISL8103 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Three-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers |
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