TB62206FG Toshiba, TB62206FG Datasheet - Page 13

• Manufacturer Part Number: TB62206FG
• Manufacturer: Toshiba

Specifications of TB62206FG

• Function: Driver
• Vopmax (vm*): 35V (40V)
• Io (lpeak): 1.5A (1.8A)
• Excitation: 1/2 step
• I/f: phase input (2-bit/phase)
• Mixed Decay Mode: included
• Package: HSOP20
• Rohs Compatible†: yes

How to Calculate Set Current
How to Calculate the Chopping and OSC Frequencies
oscillator.
resistor (R
or more) is required.
(for 1-2 phase excitation with 71% of torque, the peak current should be set to 100%).
determined by external capacitor and resistor as a reference.
For example, when applying V
For example, when C
This IC drives the motor, controlling the PWM constant current in reference to the frequency of CR
At that time, the maximum current value (set current value) can be determined by setting the sensing
1/5.0 is V
At constant current control, this IC chops frequency using the oscillation waveform (saw tooth waveform)
The TB62206FG requires an oscillation frequency of eight times the chopping frequency.
The oscillation frequency is calculated as follows:
At this time, the chopping frequency f
f
I
f
chop
OUT
CR
RS
=
ref
(max)
= f
0.523
) and reference voltage (V
(gain): V
CR
/8 = 101
=
×
5.0
1
(C
x
×
ref
osc
1
V
R
ref
kHz
attenuation ratio. (for the specifications, see the electrical characteristics.)
+
= 560 pF and R
600
(V)
x
×
ref
Torque
C)
= 3 V and torque = 100% to drive out I
R
RS
ref
(Torque
chop
).
(
osc
Ω
x )
is calculated as follows:
= 3.6 kΩ are connected, f
100(%)
=
100,
13
71%)
CR
= 813 kHz.
OUT
of 0.8 A, R
RS
TB62206FG
= 0.75 Ω (0.5 W
2011-02-10