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參數(shù)資料
| 型號： | TDA21302 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Multi-Phase PWM Controller for CPU Core Power Supply |
| 中文描述： | 多相PWM控制器，電源為CPU內(nèi)核電源 |
| 文件頁數(shù)： | 21/25頁 |
| 文件大?。?/td> | 588K |
| 代理商： | TDA21302 |
Layout Guide :
CoreControl
TM
Page 21 of 25
DS-CoreControl-TDA21302
Place the high-power switching components first, and separate them from the sensitive nodes.
1. Most Critical Path :
The current sense circuit is the most sensitive part of the converter. The current sense resistor
tied to ISP1,2,3,4 and ISN1,2,3,4 should be located not more than 0,5 inch from the IC and
away from the noise switching nodes. The PCB trace of sense nodes should be parallel and as
short as possible. Kelvin connection of the sense component, additional current sense resistor
or the R
DS(ON)
of MOSFETs, ensures the accurate and stable current sensing signals.
2. Switching Ripple Path :
The best connection of the input capacitors is to place at the drain of the high side MOSFET
and the source of the low side MOSFET.
Low side MOSFET to the output capacitor.
The return path of input and output capacitor.
Separate the power and signal GND.
The PHASE node, the conjunction of the high / low side MOSFETs and inductor, is the
nosiy node. Keep them away from the sensitive small-signal node.
Reducing the parasitic impedance and inductance is done by minimizing the length of the
traces, offering enough copper area and avoiding the vias.
DPAK or
D
2
PAK
IPAK
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