參數(shù)資料
型號: TB6549P
廠商: Toshiba Corporation
英文描述: Full-Bridge Driver IC for DC motor
中文描述: 全橋直流馬達(dá)驅(qū)動IC
文件頁數(shù): 5/18頁
文件大?。?/td> 295K
代理商: TB6549P
TB6549F/P
2002-08-30
5
Component Description
1. Control Input/PWM Input Circuit
The input signals are shown below. Input at the CMOS and TTL levels can be provided. Note that the
input signals have a hysteresis of 0.2 V (typ.).
V
INH
: 2 to V
reg
V
V
INL
: GND to 0.8 V
The PWM input frequency should be 100 kHz or less.
Input/Output Function
Input
Output
IN1
IN2
SB
PWM
OUT1
OUT2
Mode
H
H
H
H
L
L
L
Short brake
H
L
H
CW/CCW
L
H
H
L
L
L
Short brake
H
H
L
CCW/CW
H
L
H
L
L
L
Short brake
H
L
L
H
L
OFF
(high impedance)
Stop
H
H/L
H/L
L
L
OFF
(high impedance)
Standby
PWM control function
Motor speed can be controlled by inputting the 0/5-V PWM signal to the PWM pin.
When PWM control is provided, normal operation and short brake operation are repeated.
If the upper and lower power transistors in the output circuit were ON at the same time, a penetrating
current would be produced. To prevent this current from being produced, a dead time of 300 ns (design
target value) is provided in the IC when either of the transistors changes from ON to OFF, or vice versa.
Therefore, PWM control by synchronous rectification is enabled without an OFF time being inserted by
external input. Note that a dead time is also provided in the IC at the time of transition between CW
and CCW or between CW (CCW) and short brake mode, thereby eliminating the need for an OFF time.
V
DD
V
DD
100 k
IN1
(IN2, PWM)
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