參數(shù)資料
型號(hào)： L6280
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 4.4 A, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 9/26頁
文件大小： 8983K
代理商： L6280
DUAL HALF BRIDGE CONFIGURATION (CH1
and CH2)
In dual half bridge configuration the connection
between the output of the high side drivers and
the corresponding low side drivers has to be
made with external jumpers. The output stage
block diagram shown in figure 20 must be substi-
tuted in side the blank boxes in the following
block diagrams. In dual half bridge configuration,
the time sharing strategy is always used.
Figure 20
D0
D1
D2
D3
X
0
Tristate left and right
X
0
1
Chopper left, fixed righ
X
0
1
0
Chopper right, fixed left
X
011
Fixed left and right. For these
configurations, see the
corresponding shown in Full
Bridge Configuration paragraph
(Page 14/24).
D0
D1
D2
D3
X
1
0
Chopper left chopper right
As foreseen when in unipolar motor configura-
tion(see Figure 5), the time sharing strategy is
used (see Figure 10), so when the current in left
winding is controlled, the current in right winding
recirculate trough the low side drivers and not
through the sense resistor (Fig. 21).
Figure 21
D0
D1
D2
D3
X
1
0
1
Tristate left, chopper right
During ON time (Q = LOW) the current flows
through high side driver HSD2, right winding and
sense resistor. During OFF time the current recir-
culate through winding and side drivers LSD2A
and LSD2B (Fig. 22).
Figure 22
D0
D1
D2
D3
X
1
0
Tristate right, chopper left
During ON time (Q = LOW) the current flows
through high side driver HSD1, left winding and
sense resistor. During OFF time the current recir-
culate through the winding and low side drivers
LSD1A and LSD2A (Fig 23).
L6280
17/26
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