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参数资料
| 型号： | LB1823 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDIP30 |
| 封装： | SDIP-30 |
| 文件页数： | 11/11页 |
| 文件大小： | 280K |
| 代理商： | LB1823 |
8. FG amplifier
The FG amplifier gain is determined by R7 and R8, with the DC gain, G, being R8/R7. C9 and C10 determine the
FG amplifier frequency characteristics. (R7 and C9 form a high-pass filter and R8 and C10 form a low-pass filter.)
Since a Schmitt comparator is connected following the FG amplifier, the components R1, R2, C4 and C5 must be
chosen so that the amplitude is at least 250 mVp-p. (It is desirable that the FG output be set up to provide a level of
between 1 and 3 Vp-p during steady state motor rotation.)
9. Notes on external capacitors
C8
C8 is required for stabilization of the FGIN+ pin constant voltage power supply and to generate the IC internal
logic reset pulse. The reset pulse is generated when the FGIN– pin reaches about 1.3 V from 0 V. If the reset does
not operate, the LD pin will go on briefly during IC start.
C2
C2 is required for power supply stabilization. Since this IC adopts a PWM technique that switches large output
currents, it can generate noise extremely easily. Thus the power supply must be stabilized adequately so that this
noise does not cause the IC to operate incorrectly. C2 should be located as close as possible to pins 17 and 24.
10. Notes on external resistors
R13, R14 and R15
These resistors set the external output (source side) transistor drive currents. The drive currents (ID) can be derived
from the following formula.
ID ≥ IOUT/hFE min
ID = (VCC – 0.7 – VO sat)/R
IOUT: Maximum output current
hFE min: Output transistor minimum current amplification factor
VO sat: The LB1823 output saturation voltage
R16
R16 sets the shunt regulator bias current. R16 must be selected so that a current of over 1 mA flows in the VM
voltage range for which guaranteed correct operation is desired.
R16 ≤ (VM min – VREG)/1 mA
R17, R18 and R19
R17, R18 and R19 prevent leakage from the lower side output transistors and make the switching time faster.
R20
R20 prevents leakage from the integrator. A value of around 24 kΩ is recommended. If this resistor is not used, the
INT OUT pin will go high in stop mode due to leakage currents. Startup is delayed by the integrator external time
constant at start time, since the motor is accelerated when the INTOUT pin is low.
11. External transistors
Regulator transistor
Select a transistor with a current capacity of at least 70 mA and a breakdown voltage greater than the largest VM
voltage. Heat generation will be a problem. Use a heat sink or other cooling technique if required.
Pd = (VM max – VREG) × I
I: ICC + Hall bias current + output current (source) + α
When the internal shunt regulator is not used, the power supply must be connected directly to the VCC pin
(4.5 to 7 V). The regulator transistor is not required in this case.
2SC2314 (TO126), 2SD330 (TO220)
2SC3985 (TO220ML) or similar transistor
Output interface transistors
These transistors are used to assure that high voltages are not applied to the IC. (The total system cost is lower by
restricting the IC breakdown voltage.) Select transistors with a current capacity of at least 30 mA and a breakdown
voltage greater than the largest VM voltage. (R13, R14 and R15 determine the currents.)
2SC4641 (NP), 2SC4640 (SPA)
2SC4520 (PCP), 2SC4211 (MCP) or similar transistors
No. 4263-9/11
LB1823
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LB1823-F-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LB1823M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Power Brushless Motor Predriver IC for OA Applications |
| LB1824 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Power Brushless Motor Driver for OA Equipment |
| LB1825 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Three-Phase Brushless Motor Driver |
| LB1830 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Low-Saturation Bidirectional Motor Driver for Low-Voltage Applications |
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