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參數(shù)資料
| 型號： | LB1922 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Three-Phase Brushless Motor Driver for Office Automation Applications |
| 中文描述： | 三相無刷電機(jī)的辦公自動化應(yīng)用程序 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 123K |
| 代理商： | LB1922 |
D2, and D3 are for through current prevention, use Schottky diodes with a small V
f
. This will prevent the potential
difference between the output pins and V
CC
from becoming a problem. Although normal rectifying diodes can be
used for D4, D5, and D6, design the ground lines carefully as described in item 6, “Ground leading”, so that parasitic
effects do not occur.
8. External interface pins
LD pin
Output type: open collector
Voltage handling capacity: 20 V (absolute maximum)
Saturation voltage sample-to-sample variation reference value (I
LD
= 10 mA)
0.0 to 0.5 V
FGS pin
Output type: open collector
Voltage handling capacity: 20 V (absolute maximum)
Saturation voltage sample-to-sample variation reference value (I
FGS
= 2 mA)
0.12 to 0.18 V
The FGS pin output is the FG amplifier output converted to a pulse output by a hysteresis comparator. It is used
as a speed monitor. If the FGS pin is not used, the pull-up resistor is not required.
Start/Stop pin
Input type: PNP transistor base with a 50-k
pull-down resistor connected to ground
Threshold level (typical): About 2.6 V
The 4-V, 5-V, and 7-V fixed-voltage supplies are turned off in stop mode.
F/R pin
Input type: PNP transistor base with a 50-k
pull-down resistor connected to ground
Threshold level (typical): About 2.2 V (high
→
low), about 2.7 V (low
→
high)
Hysteresis: about 0.5 V
F/R switching must only be performed in stop mode when the motor is stopped.
9. Fixed-voltage supply temperature characteristics
4-V supply: about –0.5 mV/°C
5-V supply: about –0.6 mV/°C
7-V supply: about –2.5 mV/°C
10. FG amplifier
The FG amplifier gain is determined by R1 and R2, and the DC gain, G, will be R2/21. The FG amplifier frequency
characteristics are determined by C4 and C5. (R1 and C4 form a high-pass filter and R2 and C5 form a low-pass
filter.) Since the FG amplifier output is input to a Schmitt comparator, set up values for R1, R2, C4, and C5 so that
the FG amplifier output has an amplitude of at least 250 mV p-p. (It is desirable to set up the FG amplifier so that its
output has an amplitude of between 1 and 3 V p-p during steady state motor operation.)
11. External capacitors
C3
C3 is required to stabilize the FG
IN+
pin fixed-voltage supply and to generate the initial reset pulse for the IC
internal logic. Although a relatively small capacitance suffices for power supply stabilization, a larger capacitance
(about 4.7 μF) is required to generate the reset pulse. The reset pulse is generated at the time when the FG
IN+
pin
goes from 0 V to about 1.3 V. If the reset function does not operate, the LD pin may go on briefly at startup. If this
phenomenon is not a problem, a capacitance of around 0.1 μF can be used for C3. After C3 is charged to 4 V, if
V
CC
is turned off (or the IC is set to stop mode), the capacitor will be discharged by an IC-internal load of about
10 k
that is connected to this capacitor.
C1 and C2
C1 and C2 are required for fixed-voltage supply stabilization. Since this IC adopts a direct PWM technique and
switches large currents in the outputs, it is extremely easy for noise to be generated. Therefore, adequate power-
supply stabilization is required to prevent that noise from causing incorrect circuit operation. C1 through C3 must
be connected to GND1 with lines that are as short as possible. In particular, C1 can easily influence system
characteristics and requires care.
No. 5679-6/10
LB1922
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PDF描述 |
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| LB1923M | Power Brushless Motor Pre-Driver IC for OA Equipment |
| LB1924 | Power Brushless Motor Driver IC for Office Automation Equipment |
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參數(shù)描述 |
|---|---|
| LB1923M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Power Brushless Motor Pre-Driver IC for OA Equipment |
| LB1923M-MPB-E | 制造商:ON Semiconductor 功能描述:3PHASE MOTOR PRE-DRIVER - Trays |
| LB1923M-TLM-E | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 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 |
| LB1924 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Power Brushless Motor Driver IC for Office Automation Equipment |
| LB1927 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Office Automation Equipment 3-phase Brushless Motor Driver |
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