tb62202afg TOSHIBA Semiconductor CORPORATION, tb62202afg Datasheet - Page 22

• Manufacturer Part Number: tb62202afg
• Description: Dual-stepping Motor Driver Ic For Oa Equipment Using Pwm Chopper Type
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Calculation of Set Current
Determining R
I
1
For example,
Formulas for Calculating CR Oscillation Frequency
The CR oscillation frequency and f
Example : When Cosc = 1,000 pF and Rosc = 2.0 kΩ are connected, f
At this time, the chopping frequency f
out
/
5.0 is V
Note:
(Max)
ref
to input V
R
f
KA (constant): 0.523
KB (constant): 600
f
=
CR =
chop =
f
At this time, t (CR-discharge) is subject to the following condition:
Be sure to set the CR value in accordance with this condition.
RS =
CR
(gain) : V
V
RS
ref
=
0.75 Ω (0.5 W or more) is required.
KA
f
t
and V
CR
CR
8
(GAIN)
1
1
ref =
600 ns > t (CR-discharge) > 400 ns.
×
ref
(C
[Hz]
ref
×
attenuation ratio (typ.).
3 V and Torque
1
R
× V
determines the set current value.
CR oscillation CR charge
×
KB
ref
cycle
×
(V) ×
C)
t
chop
CR
[Hz]
chop
=
can be calculated by the following formulas:
T
t
=
orque
(Charge)
100% and to output I
is : f
time
(T
chop
orque
+
= f
t
CR
(Dis
=
100,
CR distance
22
/
8 = 92 kHz.
-
Charge)
time
85,
R
RS
out =
70,
(
Ω
50%
CR
)
0.8 A,
(Chopping reference frequency)
= 735 kHz.
:
input
serial
data
)
TB62202AFG
2005-04-04