參數(shù)資料
型號(hào)： TPIC43T02DAR
廠商： TEXAS INSTRUMENTS INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： BRUSHLESS DC MOTOR CONTROLLER, PDSO38
封裝： PLASTIC, TSSOP-38
文件頁(yè)數(shù)： 11/29頁(yè)
文件大?。?/td> 463K
代理商： TPIC43T02DAR
TPIC43T01, TPIC43T02
THREE-PHASE BRUSHLESS MOTOR RPM CONTROLLERS
SLIS098 – APRIL 2000
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
Table 6. Digital Coefficient Truth Table
EEPROM
ADDR 0
BIT 7
EEPROM
ADDR 0
BIT 6
EEPROM
ADDR 0
BIT 5
K2
COEFFICIENT
0
120
0
1
121
0
1
0
122
0
1
123
1
0
124
1
0
1
125
1
0
126
1
127
Default setting for the digital filter coefficient
15
5
40
0
120
121
122
123
124
Digital
Filter
Zero
–
Hz
30
20
35
K2 and K1 Filter Coefficient
50
125
126
127
45
25
10
Default Zero Setting
K1 = 14
K1 = 28
K1 = 56
DIGITAL FILTER ZERO
vs
K2 and K1 FILTER COEFFICIENT, (TS = 500 s)
Figure 14. Digital Filter Coefficient
FG watchdog
The FG watchdog monitors FGOUT output, allowing an internal timer to count until a transition in FGOUT occurs
and clears the counter. Should timer time-out occur by reaching a count equivalent to 25 ms (512 counts of the
PWM clock), two actions are taken: 1) speed discriminator UP error output is set to 100%; 2) lock detect is set
and lock timer begins counting (see
lock timer oscillator/counter section). These actions ensure the digital
integrator counts up (increasing motor drive PWM) at startup of the system, or, if the FG signal is lost during
operation and if no detection of an FG period of < 25 ms occurs for the duration of the lock timer, the IC will go
into shutdown mode, disabling the motor drive (see
shutdown section).
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