參數(shù)資料
型號: 22495
英文描述: Implementation of Write Allocate Application Note Mobile AMD-K6 Processor Power Supply Design Application Note
中文描述: 在寫分配執(zhí)行情況的說明移動應(yīng)用的AMD - K6處理器電源設(shè)計應(yīng)用指南
文件頁數(shù): 18/50頁
文件大?。?/td> 1087K
代理商: 22495
8
Mobile AMD-K6
Processor Family Power
Mobile AMD-K6
Processor Power Supply Design
22495C/0—May 1999
that provide the processor with accurate and stable voltage
supplies.
In the basic asynchronous circuit design shown in Figure 4, Q1
turns on to charge C
out
and builds up the magnetic field in L1.
When the feedback from the sense input is too high, the
controller turns Q1 off. Current is supplied to the load by the
collapsing magnetic field in L1 and the discharge of C
out
. When
the sense feedback detects a drop in the load voltage, the
controller turns on Q1 to recharge the circuit. CR2 supplies a
return path for L1 when it is supplying current.
Figure 4. Basic Asynchronous Design
The operation of the basic synchronous circuit design shown in
Figure 5 is essentially the same as the asynchronous design. Q1
turns on to charge C
out
and builds up the magnetic field in L1.
When the feedback from the sense input is too high, the
controller turns Q1 off. Current is supplied to the load by the
collapsing magnetic field in L1 and the discharge of C
out
. When
the sense feedback detects a drop in the load voltage, the
controller turns on Q1 to recharge the circuit. Q2 supplies a
return path for L1 when it is supplying current. When Q1 is on,
Q2 is off and when Q1 is off, Q2 is on. The main reason the
synchronous design is more efficient than the asynchronous
design is because the power dissipated in Q2 is lower than the
power dissipated in CR2.
R
L
C
out
L
1
CR2
Controller
Q
1
Sense
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