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參數(shù)資料
| 型號： | L6256 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 12V COMBO |
| 中文描述： | 12V的組合 |
| 文件頁數(shù)： | 23/28頁 |
| 文件大?。?/td> | 258K |
| 代理商： | L6256 |
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Figure 14. Back EMF Phase Detection Timing Relantionships
TRANSITIONS
Transitioning from blind table drive to a back EMF mode drive is handled in the following manner. Re-
member, data written to the CPR takes effect only when SP_CLK receives a positive transition. The fol-
lowing steps must be taken:
●
The programmer must ensure that the last state before state 0 has been output to the CPR and
clocked in using SP_CLK.
●
An all 1’s value is written to the CPR to enable the state counter.
●
The next SP_CLK will then produce a state 0 from the sequencer.
Voice Coil Driver (Vcm) Section
VCM SECTION SPECIFICATIONS
Parameter
Test Conditions
Output Swing from 1 to
10V
Min.
Typ.
70
Max.
Units
dB
Large Signal Voltage gain
Gain Bandwidth Product, A-Amp
3dB BW, total loop
Phase Margin, A Amp
Slew Rate, A Amp
Gain, B Amp
3dB Bandwidth, B
Total A+B saturation Resistance
Offset reflected to I
sense
Vpwr/2 Input Impedance
Loopback Output Threshold (2)
V
sst
Saturated seek comparator threshold
4.5
25
45
MHz
kHz
°
V/
μ
s
*A gain
MHz
mV (1)
k
mA/
mV
1.4
2
-1.17
2.3
I = 600mA
D/A reg @ 0
25°C
25°C
Output saturated either
polarity
2
3
30
65
38
50
50
50
30
70
(1) Total current offset of VCM loop must not exceed 3% of full scale current.
(2) Optional.
L6256
23/28
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|---|---|
| L6258 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
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