參數(shù)資料
型號(hào)： 22495
英文描述： Implementation of Write Allocate Application Note Mobile AMD-K6 Processor Power Supply Design Application Note
中文描述： 在寫(xiě)分配執(zhí)行情況的說(shuō)明移動(dòng)應(yīng)用的AMD - K6處理器電源設(shè)計(jì)應(yīng)用指南
文件頁(yè)數(shù)： 19/50頁(yè)
文件大?。?/td> 1087K
代理商： 22495
Mobile AMD-K6
Processor Family Power Requirements
9
22495C/0—May 1999
Mobile AMD-K6
Processor Power Supply Design
Figure 5. Basic Synchronous Design
Another consideration is power dissipation in the lower
MOSFET Q2 (synchronous) or diode CR2 (asynchronous). As
the output voltage decreases, the power dissipation in CR2 (Q2)
increases. The higher power dissipation may require using a
different package type or adding a heat sink to dissipate the
additional power.
To determine if the transistors or the diode need a heat sink,
use the following equation:
P = I
2
R
duty cycle (Q1)
P = I
2
R
(1– duty cycle) (Q2)
Duty cycle ~ V
out
/V
in
Compare these calculations with the specifications of the
device used.
Other specifications to consider are the input-voltage range and
the number of outputs provided. The input-voltage range must
be matched to the batteries and charger. Ensure that the
charger voltage does not exceed the input-voltage range of the
regulator when the battery is removed. Generally, the battery
stack consists of 5 to 12 NiCd cells or 2 to 3 Li-Ion cells.
Some parts supply multiple outputs. These devices can save
critical space in a mobile design. However, these devices limit
some of the voltage and current options, and should be
evaluated based on the total requirements of the end product.
R
L
C
out
Q
2
Q
1
Controller
L1
Sense
Vout
相關(guān)PDF資料
PDF描述
224CNQ SCHOTTKY RECTIFIER
224CNQ040 Proximity Sensor; Sensor Input Type:Magnetic; Sensor Output Type:NPN; Leaded Process Compatible:No; Output Type:3 Wire; Peak Reflow Compatible (260 C):No; Sensor Housing:Barrel
224CNQ045 SCHOTTKY RECTIFIER
224CNQ035 SCHOTTKY RECTIFIER
225.1 Fuse
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參數(shù)描述
224951 制造商:Q-MAX 功能描述:CUTTER ROUND 76.5MM
2249520 制造商: 功能描述: 制造商:OSM 功能描述: 制造商:undefined 功能描述:
224953 制造商:Q-MAX 功能描述:CUTTER SQUARE 19.0MM
224954 制造商:Q-MAX 功能描述:CUTTER SQUARE 25.4MM 制造商:Q-MAX 功能描述:CUTTER, SQUARE, 25.4MM
224956 制造商:Q-MAX 功能描述:PUNCH METAL RECTANGULAR 17.5X24.0MM
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