TB67H400AHG Datasheet TB67H400AHG | P7-P9

TB67H400AHG

2016-12-22

Function mode (Small Mode condition)

Logic input function table

(1) INA1, INA2

These pins set the drive mode for Motor A ch.

PWMA

INA1

INA2

OUTA+

OUTA-

Function

INPUT

L L OFF (Hi-Z) OFF (Hi-Z)

STANDBY MODE

(Note)

H STOP (OFF)

L H

L L Short brake

H L H

CCW (Counter

clock-wise)

H L

L L Short brake

H H L CW (Clock-wise)

H H L L Short brake

(2) INB1, INB2

These pins set the drive mode for Motor B ch.

PWMB

INB1

INB2

OUTB+

OUTB-

Function

INPUT

L L OFF (Hi-Z) OFF (Hi-Z)

STANDBY MODE

(Note)

H STOP (OFF)

L H

L L Short brake

H L H

CCW (Counter

clock-wise)

H L

L L Short brake

H H L CW (Clock-wise)

H H L L Short brake

Note: The standby mode is only enabled when all 6 logic input pins (INA1, INA2, PWMA, INB1, INB2, and PWMB)

are set to Low level.

TB67H400AHG

2016-12-22

(3) TBLKAB

This pin will set the noise rejection time.

TBLKAB TBLK noise rejection time

L Digital tBLK = fOSCM × 4 clk

H Digital tBLK = fOSCM × 6 clk

Please note that the timing charts or constants may be omitted or simplified for explanatory.

* The Digital tBLK is used to avoid error judgment of varistor recovery current that occurs in charge drive mode when

H-bridges are used with DC motors. The Digital tBLK time can be controlled with TBLKAB pin.

By setting Digital tBLK, direct PWM control and constant current control is possible, but the motor current will rise

above the predefined current level (NF) while digital tBLK is active.

* Besides Digital tBLK, Analog tBLK (400 ns (typ.)) settled by an internal constant of IC is also attached.

 Digital tBLK timing for Brushed DC Motor

The Digital tBLK is inserted at the beginning of each charge period of the constant current chopping, and also when

either of INA1, INA2, INB1, or INB2 is switched.

Please note that the timing charts or constants may be omitted or simplified for explanatory.

Digital tBLK

OSCM

TBLK

count

IN1/IN2

Digital tBLK

signal

(TBLKAB=L)

Synchronous delay

Digital tBLK

signal

(TBLKAB=H)

Digital tBLK

Iout

IN1

IN2

TB67H400AHG

2016-12-22

(4) HBMODE

This pin sets the H-Bridge operation mode.

Pin name Function Input Setting

HBMODE

H-Bridge

operation setting

Small mode

Large mode

Note: When using the Large mode, please make sure that the impedance between A channel and B channel is

balanced. Also, make sure that the output pins (OUTA+ and OUTA-, OUTB+ and OUTB-), RS pins (RSA and

RSB) are connected to each other when using the Large mode.

Note: Please set the HBMODE to Low or High with the PCB pattern. (Do not change the logic input level during

operation.)

Note: When the HBMODE pin is set to High level, the motor control will be controlled by the Ach inputs (INA1, INA2,

and PWMA). The Bch inputs (INB1, INB2, and PWMB) will be invalid. (When using the TB67H400AHG in the

Large mode, setting the INB1, INB2, and PWMB to Low level is preferred.) TBLKAB pin is effective in both

Small and Large modes (HBMODE=L/H).

H-Bridge connection example in each mode

 2 Small DC motor operation setting example (HBMODE=L)

2 Small DC Motor operation

H-Bridge A

OUTA-

OUTA+

RRS

Load

H-Bridge B

Load

RRS

OUTB-

OUTB+

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P23

TB67H400AHG

Mfr. #:

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Motor / Motion / Ignition Controllers & Drivers MONOLITHIC BRUSHED DC MOTOR DRIVER BiCD

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TB67H400AHG