TB6613FTG

2012-01-30

6

Principle of Operation

Bridge Outputs: Channels A through H

PWM Control

In PWM constant-current mode, the PWM chopper circuit alternates between on (t1, t5) and short brake

(t3).

(To eliminate shoot-through current, a dead time (t2, t4) of 50 ns (design target only) is inserted when the

PWM is turned on and off.)

M

VM

OUT2

OUT1

<PWM: OFF → ON>

t4

GND

M

VM

OUT2

OUT1

<PWM: ON>

t5

GND

M

GND

OUT2

OUT1

<PWM: OFF>

t3

M

GND

OUT2

OUT1

<PWM: ON → OFF>

t2

M

GND

OUT2

OUT1

<PWM: ON>

t1

VM

GND

Output voltage waveform

(OUT1)

t1

t5

t3

t2

t4

VM

VM

VM