參數(shù)資料
型號(hào)： 21103
英文描述： AMD-K6 Processor Family Thermal Solutions Application Note AMD-K6 Processor Power Supply Design Application Note
中文描述： 的AMD - K6處理器系列散熱解決方案應(yīng)用指南的AMD - K6處理器電源設(shè)計(jì)應(yīng)用指南
文件頁(yè)數(shù)： 19/64頁(yè)
文件大?。?/td> 1056K
代理商： 21103
Processor Power Requirement
9
21103G/0—February 1999
AMD-K6
Processor Power Supply Design
several high-accuracy designs that provide the processor with
accurate and stable voltage supplies.
In the basic asynchronous circuit design shown in Figure 3, 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 suppling current. The main reason
this design is less efficient than a synchronous design is
because the power dissipated in CR2 is higher than Q2 in the
synchronous design.
Figure 3. Basic Asynchronous Design
The operation of the basic synchronous circuit design shown in
Figure 4 on page 10 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 this
design is more efficient is because the power dissipated in Q2 is
lower than the power in CR2.
R
L
C
out
CR2
Controller
Q
1
Sense
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