參數(shù)資料
型號: TPS5103DB
廠商: Texas Instruments, Inc.
英文描述: MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
中文描述: 多模同步DC / DC控制器
文件頁數(shù): 25/37頁
文件大小: 1052K
代理商: TPS5103DB
TPS5103
MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
SLVS240 – SEPTEMBER 1999
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The typical compensation circuit used as an option in the EVM design is a part of the output feedback circuit.
The circuitry is displayed below.
_
+
R4
C3
C2
R2
R1
C1
R3
Vref
To PWM
This circuit is composed of one integrator, two poles, and two zeros:
Assuming R1 << R2 and C2 << C3, the equation i
s:
Comp
(1
sC3R4)
(1
sC2R2)
sC1R1)
sC3R2(1
sC2R4)(1
Therefore,
Pole1
1
2 C1R1
Pole2
1
2 C2R4
Zero2
1
2 C3R4
Zero1
1
2 C2R2
Integrator
1
2
C3R2
A simplified version used in the EVM design is exhibited below.
_
+
R4
C3
C2
R2
Vo
R3
Vref
Assuming C2 << C3, the equation is:
Comp
(1
sC3R4)
sC2R4)
sC3R2(1
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