参数资料
型号: TPIC0108BDWPR
厂商: TEXAS INSTRUMENTS INC
元件分类: 运动控制电子
英文描述: BRUSH DC MOTOR CONTROLLER, PDSO20
封装: PLASTIC, SOP-20
文件页数: 4/15页
文件大小: 289K
代理商: TPIC0108BDWPR
TPIC0108B
PWM CONTROL INTELLIGENT HBRIDGE
SLIS068A NOVEMBER1998 REVISED APRIL 2002
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
Necessary for isolating supply voltage or interruption (e.g., 47 F).
VCC
M
CONTROL
DIAGNOSTIC
Microcontroller
IN1
IN2
STATUS1
STATUS2
GND GNDS
OUT1
OUT2
VCC
TPIC0108B
100 k
5 V
100 nF
47
F
NOTE: If a STATUS output is not connected to the appropriate microcontroller input, it shall remain unconnected.
recirculation current mode
When an inductive load (motor) is switched from one control mode to another, (i.e., forward to reverse) the
TPIC0108B automatically enters a special recirculation current mode condition. This condition allows fast
elimination of the recirculation currents caused by inductive switching. Once these currents have subsided to
an acceptable level, the device automatically enters the requested state. This feature eliminates the need for
either internally or externally connected free wheeling diodes and protects the TPIC0108B from damage due
to high inductive voltage transients.
The recirculation current mode condition is triggered when the voltage at the HSD output voltage exceeds
typically VCC + 0.7 V. In this condition, a diode inherent in the HSD structure turns on. Simultaneously internal
control circuitry turns on the opposite HSD, thus providing a current path for the recirculating currents.
Using TPIC0108B in PWM operation brake mode shall be applied before going into quiescent mode.
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