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參數(shù)資料
| 型號： | TB62209F |
| 廠商： | Toshiba Corporation |
| 英文描述： | Stepping Motor Driver IC Using PWM Chopper Type |
| 中文描述： | 步進(jìn)馬達(dá)驅(qū)動IC用PWM斬波型 |
| 文件頁數(shù)： | 32/51頁 |
| 文件大?。?/td> | 1773K |
| 代理商： | TB62209F |
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TB62209F
2001-09-05
32
How to Calculate Set Current
This IC controls constant current in CLK-IN mode.
At that time, the maximum current value (set current value) can be determined by setting the sensing
resistor (R
RS
) and reference voltage (V
ref
).
100
×
)
(
=
×
×
=
R
50%)
70,
85,
100,
(Torque
Torque
(V)
V
5.0
1
I
RS
ref
(max)
OUT
1/5.0 is V
ref
(gain): V
ref
attenuation ratio. (For the specifications, see the electrical characteristics.)
For example, when inputting V
ref
=
3 V and torque
=
100% to output I
OUT
=
0.8 A, R
RS
=
0.75
(0.5 W
or more) is required.
How to Calculate the Chopping and OSC Frequencies
At constant current control, this IC chops frequency using the oscillation waveform (saw tooth waveform)
determined by external capacitor and resistor as a reference.
The TB62209F requires an oscillation frequency of eight times the chopping frequency.
The oscillation frequency is calculated as follows:
C)
600
R
(C
0.523
1
f
CR
×
+
×
×
=
For example, when C
osc
=
560 pF and R
osc
=
3.6 k
are connected, f
CR
=
813 kHz.
At this time, the chopping frequency f
chop
is calculated as follows:
f
chop
=
f
CR
/8
=
101
kHz
When determining the chopping frequency, make the setting taking the above into consideration.
IC Power Dissipation
IC power dissipation is classified into two: power consumed by transistors in the output block and power
consumed by the logic block and the charge pump circuit.
Power consumed by the Power Transistor (calculated with R
ON
=
0.60
)
In Charge mode, Fast Decay mode, or Slow Decay mode, power is consumed by the upper and lower
transistors of the H bridges.
The following expression expresses the power consumed by the transistors of a H bridge.
P (out)
=
2 (T
r
)
×
I
OUT
(A)
×
V
DS
(V)
=
2
×
I
OUT2
×
R
ON
..............................(1)
The average power dissipation for output under 4-bit micro step operation (phase difference between
phases A and B is 90°) is determined by expression (1).
Thus, power dissipation for output per unit is determined as follows (2) under the conditions below.
R
ON
=
0.60
(at 1.0 A)
I
OUT
(Peak: max)
=
1.0 A
V
M
=
24 V
V
DD
=
5 V
P (out)
=
2 (T
r
)
×
1.0
2
(A)
×
0.60 (
)
=
1.20 (W)..............................................(2)
Power consumed by the logic block and IM
The following standard values are used as power dissipation of the logic block and IM at operation.
I (LOGIC)
=
4.0 mA (typ.):
I (I
M3
)
=
15.0 mA (typ.): operation/unit
I (I
M1
)
=
4.0 mA (typ.): stop/unit
The logic block is connected to V
DD
(5 V). IM (total of current consumed by the circuits connected to
V
M
and current consumed by output switching) is connected to V
M
(24 V). Power dissipation is
calculated as follows:
P (Logic&IM)
=
5 (V)
×
0.004 (A)
+
24 (V)
×
0.015 (A)
=
0.38 (W).................(3)
Thus, the total power dissipation (P) is
P
=
P (out)
+
P (Logic&IM)
=
1.51 (W)
Power dissipation at standby is determined as follows:
P (standby)
+
P (out)
=
24 (V)
×
0.004 (A)
+
5 (V)
×
0.004 (A)
=
0.116 (W)
For thermal design on the board, evaluate by mounting the IC.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB62209FG | 制造商:Toshiba 功能描述:Stepper Motor Driver 5V 38-Pin (36+2Tab) HSOP Cut Tape |
| TB62209FG(EL) | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Stepping Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| TB62209FG(O,EL) | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Stepping Motor PWM 40V 1.8A RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| TB62209SN | 制造商:THOMAS & BETTS 功能描述: |
| TB622-100.0M | 制造商:Connor-Winfield 功能描述:OSC TCXO 100MHZ 3.3V SMD |
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