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| 型号： | LB1669 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.5 A, PDIP10 |
| 封装： | SDIP-10 |
| 文件页数： | 4/6页 |
| 文件大小： | 189K |
| 代理商： | LB1669 |
LB1669
No. 3513-4/6
Sample Application Circuit 2 Output Waveform Diagram
Truth TableI
IN+
IN–
C
OUT1
OUT2
HL
L
H
L
LH
L
H
HL
H
LH
H
Design Notes (See Sample Application Circuits.)
(1) Supply Voltage (VIN pin)
Due to the built-in parallel regulator which supplies power to the Hall amplifier circuit and the control block.
Therefore, the LB1669 is not affected by power source fluctuations and kickbacks from the motor and maintains
the stable operation even if noise signals such as surge are generated.
Set the resistance R1 between VCC and VIN so that the ICC current of 6 mA to 50 mA can flow into the VIN pin within the
supply voltage range of a fan motor.
VIN is 6.7 V typ at ICC = 7 mA.
The current flowing into VIN is calculated using the equation shown below.
ICC =
VCC –VIN
....... (1)
R1
Consideration given to surge voltage
The maximum allowable current at VIN pin is 200 mA, so the withstand voltage level is designed as follows.
Vsurge = VIN + R1 x 200 mA......(2)
(2) Hall input pin voltage (IN– and IN+ pins)
IN– and IN+ are input pins for the Hall element output. Set the Hall element output voltage to within the range of 0 V to VIN
– 1.5 V.
The gain between the Hall input pin and the output pin is 100 dB or greater. The offset voltage of the Hall input amplifier is
±7 mV therefore, the Hall element output must be set with the offset voltage (±7 mV) considered.
(3) Output transistors (OUT1 and OUT2 pins)
Output current IO = 1.5 A max.
Output saturation voltage VO sat = 1.15 V/1.0 A (typ.)
The LB1669 requires one of the three types of output protection.
1 When external capacitors are connected between OUT and GND, the capacitance should not exceed 10 F. Use
capacitance that will hold kickback voltage and back voltage to 60 V or less.
2 When external Zener diodes are connected, use one that will have a cutoff voltage of 40 V or less. If radio noise is a
problem, insert a capacitor of 0.01 to 0.1
F between B1 and B2.
3 When external capacitors are connected between OUT and B, use one that will hold kickback voltage to 40 V or less.
If it oscillates, insert resistance in series with the capacitor.
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相关代理商/技术参数 |
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| LB1669M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:2-Phase Unipolar Brushless Motor Driver |
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