tb62212ftag TOSHIBA Semiconductor CORPORATION, tb62212ftag Datasheet - Page 20

• Manufacturer Part Number: tb62212ftag
• Description: Pwm Chopper Type Dual-stepping Motor Driver
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Calculation of Set Current
Determining R
V
For example, when
The value of the motor constant current (Peak current) can be obtained as follows.
When Output Current > Set Current in Mixed Decay Mode
ref (gain)
Set current
value
I
25%
Mixed
decay
mode
out
V
I
out
ref
: V
I
out
ref
= 1.5 V/5.0/1.0 Ω = 0.30 A
= 1.5 V, R
RS
=
attenuation ration is 1/5.0 (typ.)
V
and V
ref
NF
(gain)
RS
ref
= 1.0 Ω,
V
determines the set current value.
ref
×
1/f
R
V
change
chop
ref
RS
(V)
(
Ω
)
NF
Set current value
20
1/f
chop
MDT (Mixed Decay Timing) point
1/f
TB62212FTAG
chop
2010-10-05