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参数资料
| 型号： | TB62209FG |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1.8 A, PDSO38 |
| 封装： | 0.450 INCH, 0.65 MM PITCH, PLASTIC, HSOP-26/38 |
| 文件页数： | 26/51页 |
| 文件大小： | 501K |
| 代理商： | TB62209FG |
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TB62209FG
2005-03-02
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 (RRS) and reference voltage (Vref).
1/5.0 is Vref (gain): Vref attenuation ratio. (For the specifications, see the electrical characteristics.)
For example, when inputting Vref = 3 V and torque = 100% to output IOUT = 0.8 A, RRS = 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 TB62209FG requires an oscillation frequency of eight times the chopping frequency.
The oscillation frequency is calculated as follows:
C)
600
R
(C
0.523
1
fCR
×
+
×
=
For example, when Cosc = 560 pF and Rosc = 3.6 k are connected, fCR = 813 kHz.
At this time, the chopping frequency fchop is calculated as follows:
fchop = fCR/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 RON = 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 (Tr) × IOUT (A) × VDS (V) = 2 × IOUT2 × RON ..............................(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.
RON = 0.60 (@ 1.0 A)
IOUT (Peak: max) = 1.0 A
VM = 24 V
VDD = 5 V
P (out) = 2 (Tr) × 1.02 (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) = 2.5 mA (typ.):
I (IM3) = 10.0 mA (typ.): operation/unit
I (IM1) = 2.0 mA (typ.): stop/unit
The logic block is connected to VDD (5 V). IM (total of current consumed by the circuits connected to
VM and current consumed by output switching) is connected to VM (24 V). Power dissipation is
calculated as follows:
P (Logic&IM) = 5 (V) × 0.0025 (A) + 24 (V) × 0.010 (A) = 0.25 (W) ...............(3)
Thus, the total power dissipation (P) is
P = P (out) + P (Logic&IM) = 1.45 (W)
Power dissipation at standby is determined as follows:
P (standby) + P (out) = 24 (V) × 0.002 (A) + 5 (V) × 0.0025 (A) = 0.06 (W)
For thermal design on the board, evaluate by mounting the IC.
100%
)
(
RS
R
50%)
70,
85,
100,
(Torque
Torque
(V)
ref
V
5.0
1
(max)
OUT
I
×
=
×
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TB62209FG(EL) | 功能描述:马达/运动/点火控制器和驱动器 Stepping Motor Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TB62209FG(O,EL) | 功能描述:马达/运动/点火控制器和驱动器 Stepping Motor PWM 40V 1.8A RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装: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 |
| TB-6221-01 | 功能描述:界面模块 SWITCH TERMINATION BRD 62P D-SUB FEMALE RoHS:否 制造商:4D Systems 产品:Serial Converters 通道/端口数量: 数据速率: 接口类型:USB, UART 工作电源电压:3.3 V, 5 V 最大工作温度: |
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