TB6552FN_07 Datasheet, PDF (3/14 Pages) Toshiba Semiconductor – DUAL-BRIDGE DRIVER IC FOR DC MOTORS

Input/Output Function (common for channel A and B)
TB6552FN/FNG/FL/FLG
Input
IN1
IN2
STBY
PWM
H
H
H
H
L
H
L
H
H
L
H
H
L
H
L
H
L
L
H
L
H
H/L
H/L
L
L
O1
O2
L
L
L
H
L
L
H
L
L
L
OFF
(high impedance)
OFF
(high impedance)
Output
Mode
Short brake
CW/CCW
Short brake
CCW/CW
Short brake
Stop
Standby
Operating Description
• PWM control function
Speed can be controlled by inputting the high-level or low-level PWM signal to the pin PWM.
When PWM control is provided, normal operation and short brake operation are repeated.
To prevent penetrating current, dead time (t2 and t4) is provided in the IC.
VM
VM
VM
O1
M
O2
O1
M
O2
O1
M
O2
PWM ON
t1
GND
PWM ON → OFF
t2 = 300 ns (typ.)
GND
VM
PWM OFF
t3
VM
GND
O1
M
O2
O1
M
O2
PWM OFF → ON
t4 = 300 ns (typ.)
GND
Output Voltage Waveform
(O1)
t5
t1
t3
PWM ON
t5
GND
V_CC
t4
t2
GND
Note: Be sure to set the PWM pin to high if the PWM control function is not used.
3
2007-4-2