參數(shù)資料
型號(hào)： TB62205FG
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 0.96 A, PDSO38
封裝： 0.450 INCH, 0.65 MM PITCH, PLASTIC, HSOP-36/38
文件頁(yè)數(shù)： 14/36頁(yè)
文件大?。?/td> 828K
代理商： TB62205FG
TB62205FG
2005-04-04
21
Calculation of Set Current
To obtain the motor setting current value (peak current), values of RRS, Vref and Torque should be determined
according to the equation below.
()
)
(
=
×
=
(
RS
R
data)
serial
input
:
25%
50,
75,
100,
(torque
Torque
(V)
ref
V
gain
ref
V
1
max)
out
I
1/Vref (gain): 1/Vref attenuation ratio is 1/4.0 (typ.).
For example,
to input Vref = 1 V and Torque = 100% and to output Iout = 0.25 A,
RRS = 1.0 (0.1 W or more) is required.
Formulas for Calculating Reference Oscillation Frequency (chopping reference
frequency)
The M_osc oscillation frequency (fosc_M) and, chopping frequency (fchop) can be calculated by the following
formulas :
() []
Hz
C
ΚΒ
36000R
CR
ΚΑ
1
×
+
×
=
fosc_M
KA (constant): 0.523
KB (constant): 600
R = 3.6 k (internal resistor)
[]
Hz
8
M_osc
chop
f
=
Example: When COSC = 560 pF is connected, M_osc = 813 kHz.
At this time, the chopping frequency fchop is: fchop = fosc/8 = 101 kHz.
Note:
osc
chopc
f
1
f
=
tosc_M = t (charge) + t (discharge)
tosc_M: Motor OSC oscillation cycle
t (charge): Motor OSC charge time
DCDC Converter Oscillating Frequency
fDCDC (DCDC PWM frequency) = 50 ()/(0.8 × COSC_D) (Hz)
PWM frequency for DCDC block is about 100 kHz when COSC_D is 620 pF.
Example:
COSC_D = 680 pF: 91 kHz
= 620 pF: 100 kHz
= 560 pF: 111 kHz
= 510 pF: 122 kHz
= 470 pF: 133 kHz
= 390 pF: 160 kHz
相關(guān)PDF資料
PDF描述
TB62205FG STEPPER MOTOR CONTROLLER, 0.96 A, PDSO38
TB62205F STEPPER MOTOR CONTROLLER, 0.96 A, PDSO36
TB6608FNG STEPPER MOTOR CONTROLLER, 0.8 A, PDSO20
TBS22A SINGLE COLOR LED
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