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STPM098C bảng dữ liệu(PDF) 83 Page - STMicroelectronics

tên linh kiện STPM098C
Giải thích chi tiết về linh kiện  Automotive dual digital 8-phase controller with PMBus™
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STPM098C bảng dữ liệu(HTML) 83 Page - STMicroelectronics

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3.14.6.4
Phase current balancing (PCB)
STPM098C integrates an in-loop current balancing architecture in order to control the phase current balancing.
This feature is accomplished by converting cycle by cycle the difference between the single phase current and the
loop average phase current. The converted value optionally multiplied by a factor A, is used to fine-tune the single
phase ON time to equalize all phase currents.
Figure 67. Phase current balancing simplified block diagram
DIGITAL
ISEN1
CFILT/VREF1
ISENm
G
G
ISEN2
GND
G
Iimi=1
Im
I2
I1
1m Iimi=1
+
-
Comp1
GND
FF
40MHz
Up/Down
1=Up
0=Down
Phase1 ON Time
Correction
R
PWMn rising edge
CS_COEFF<7:0>
A
The current balancing gain can be programmed by means of a dedicated PMBus™ command as follows:
A=CSCOEFF7:0×2−6
(50)
Where:
CS_COEFF [7:0] is the dedicated PMBus™ configuration register [1 ~ 256].
The default value is CS_COEFF = 0x80.
STPM098C
Functional description
DS14440 - Rev 1
page 83/110



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