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參數(shù)資料
| 型號： | LB1824 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Power Brushless Motor Driver for OA Equipment |
| 中文描述： | 功率無刷電機驅(qū)動的辦公自動化設(shè)備 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大小： | 134K |
| 代理商： | LB1824 |
7. Output parasitic effect
Parasitism occurs when the voltage on an output pin falls more than –0.7 V below GND1 and GND2. (The –0.7 V
figure is reduced by the temperature characteristics.) Also, do not let the voltage on the output pins exceed V
CC
by
more than 1 V. When parasitism occurs, first speed control will be lost intermittently, and then, if it becomes larger,
the output transistors can be damaged. D1, D2 and D3 are used to prevent through currents, and Schottky diodes with
a low V
f
should be used. Therefore the potential difference between the output pin and V
CC
will not be a serious
issue. Although normal forward current diodes can be used for D4, D5 and D6, care must be taken to keep the ground
leads short, as mentioned in item 6 above, to avoid parasitism.
8. External interface pins
LD pin
Output type: open collector
Breakdown voltage: a maximum current voltage of 30 V
Saturation voltage variance reference value (at I
LD
= 10 mA)
0.10 V to 0.15 V
FGS pin
Output type: open collector
Breakdown voltage: a maximum current voltage of 30 V
Saturation voltage variance reference value (at I
FGS
= 2 mA)
0.12 V to 0.18 V
FGS is the FG amplifier output converted to pulses by a hysteresis comparator (for high speed monitoring).
Start/stop pin
Input type: PNP transistor base with a 50 k
pull-down resistor to ground
Threshold level (typical): about 2.6 V
Turns off the 4, 5 and 7 V fixed voltage power supplies in steps.
F/R pin
Input type: PNP transistor base with a 50 k
pull-down resistor to ground
Threshold level (typical): about 2.2 V (high
→
low), about 2.7 V (low
→
high)
With a hysteresis of about 0.5 V.
F/R switching must be performed when stopped.Continued from preceding page.
9. Fixed voltage power supply temperature characteristics
4 V power supply: about –0.5 mV/°C (typical)
5 V power supply: about –0.6 mV/°C (typical)
7 V power supply: about –2.5 mV/°C (typical)
10.FG amplifier
The FG amplifier gain is set by R1 and R2 to be a gain of G = R2/R1. C4 and C5 determine the FG amplifier’s
frequency characteristics. (R1 and C4 form a high pass filter, and R2 and C5 form a low pass filter.) Since a Schmitt
comparator is connected following the FG amplifier, the FG amplifier’s output must be set to be over 250 mVp-p by
R1, R2, C4 and C5. (It is desirable that the FG output be between 1 to 3 Vp-p during normal motor rotation.)
11.External capacitors
C3
C3 is required for FGIN+ pin fixed voltage power supply stabilization and for IC internal logic initial reset pulse
generation. Although a low capacitance is acceptable for the power supply stabilization function, a relatively large
capacitance (about 4.7 μF) is required for reset pulse generation. The reset pulse is generated when the FGIN+ pin
goes from 0 V to about 1.3 V. If the reset does not occur, it is possible that LD could go on briefly at start time. If
this phenomenon is not a problem, a value of 0.1 μF can be used for C3. After C3 has been charged to 4 V,
when V
CC
is turned off (or in stop mode) the charge on C3 is dissipated through an IC internal load resistance of
about 10 k
that is connected to ground.
LB1824
No. 4264-7/9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LB1825 | Three-Phase Brushless Motor Driver |
| LB1830 | Low-Saturation Bidirectional Motor Driver for Low-Voltage Applications |
| LB1830M | Low-Saturation Bidirectional Motor Driver for Low-Voltage Applications |
| LB1831M | Low-Saturation Bidirectional Motor Driver for Low-Voltage Applications |
| LB1832V | Low-Saturation 1.5-Channel 3 V Drive Bidirectional Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LB1825 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Three-Phase Brushless Motor Driver |
| LB1830 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Low-Saturation Bidirectional Motor Driver for Low-Voltage Applications |
| LB1830M | 制造商:Panasonic Industrial Company 功能描述:IC |
| LB1830M_11 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Low-Voltage, Low-Saturation Bidirectional Motor Driver |
| LB1830MC | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Bidirectional Motor Driver |
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