參數(shù)資料
型號: TB6582FG
元件分類: 運動控制電子
英文描述: BRUSHLESS DC MOTOR CONTROLLER, 0.002 A, PQFP52
封裝: 10 X 10 MM, 0.65 MM PITCH, ROHS COMPLIANT, PLASTIC, QFP-52
文件頁數(shù): 7/28頁
文件大?。?/td> 279K
代理商: TB6582FG
TB6582FG
2007-10-18
Design Specifications
15
8.
Lead Angle Correction
The phase-current delay is corrected by comparing the phase current from the shunt resistor circuit
(U-phase) and the induced voltage detected at the induced voltage detection circuit (U-phase).
Current waveform with a delay of
YT
(The delay of
YT is adjusted by the
external capacitor CLA.)
2.5 V
(3)
YT
Induced voltage calculated by the
induced voltage equation
0 V
(4’)
0 V
(3’)
YT
XT
YT XT (*)
Square wave converted from the
current waveform (4)
Square wave converted from the
induced voltage waveform (3)
*: The lead angle correction logic is applied to correct the misalignment of XT.
XT
YT
2.5 V
(4)
Waveform under high-efficient
operation (ideal)
180°
360°
XT
2.5 V
(2)
0 V
(1)
Sample and hold & amplified waveform
Current waveform without the lead
angle correction (Shunt current)
Phase current
Induced voltage
(1)
Iu
Vu
Phase current
detection & Sample
and hold
Induced voltage
& Filter
Induced voltage
calculation
(2)
(3)
Phase current
delay
(4)
Lead
angle
control
logic
(3’)
(4’)
Ru
Phase current
Iu
Vref/2
46
(Note 1)
3
(Note 2)
Vrefout
VLA
Preliminary
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