参数资料
型号: L6227Q
厂商: STMICROELECTRONICS
元件分类: 运动控制电子
英文描述: BRUSH DC MOTOR CONTROLLER, 2.8 A, QCC32
封装: 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32
文件页数: 7/27页
文件大小: 435K
代理商: L6227Q
L6227Q
Circuit description
15/27
Figure 12.
Area where tON can vary maintaining the PWM regulation
4.5
Slow decay mode
Figure 13 shows the operation of the bridge in the slow decay mode. At the start of the off
time, the lower power MOS is switched off and the current recirculates around the upper half
of the bridge. Since the voltage across the coil is low, the current decays slowly. After the
dead time the upper power MOS is operated in the synchronous rectification mode. When
the monostable times out, the lower power MOS is turned on again after some delay set by
the dead time to prevent cross conduction.
Figure 13.
Slow decay mode output stage configurations
0.1
1
10
100
1
10
100
Coff [nF]
to
n(
mi
n)
[
s]
1.5
s (typ. value)
相关PDF资料
PDF描述
L6228D STEPPER MOTOR CONTROLLER, 2.8 A, PDSO24
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