- 您现在的位置：买卖IC网 > PDF目录67755 > LB1823 BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDIP30 PDF资料下载
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： | 9/11页 |
| 文件大小： | 280K |
| 代理商： | LB1823 |
External Component Functions
Notes on LB1823 Operation and External Components
1. Speed control circuit
The LB1823 uses a speed discriminator circuit and a PLL circuit in combination for speed control. The speed
discriminator generates an error output once every two FG periods using a charge pump technique. The PLL circuit
generates a phase error output once every FG period, also using a charge pump technique. By using a speed
discriminator circuit and a PLL circuit together, the LB1823 can suppress speed variations better than earlier systems
that only used a speed discriminator for speed control when used with motors faced with large load variations. Since
the following formula determines the FG servo frequency, the motor speed is set by the number of FG pulses and the
crystal oscillator frequency.
fFG (servo) = fOSC/8192
fOSC: Crystal oscillator frequency
2. Direct PWM drive
This IC adopts a direct PWM drive technique to minimize power loss in the outputs. The output transistors are
always saturated when on, and the motor drive power is adjusted by changing the duty with which the outputs are on.
Since the upper side transistors switch the outputs, Schottky, fast recovery, or similar diodes must be inserted
between OUT and ground (diodes D1, D2 and D3). (This is because through currents will flow in the upper side
transistors at the instant they turn on if these diodes do not have a short reverse recovery time.) Ordinary rectifying
diodes can be used between OUT and VCC. Transistors with no parasitic diodes must be used for the output lower
side transistors. If these transistors include parasitic diodes, through currents will flow due to their reverse recovery
time, even if Schottky diodes are used for D1, D2 and D3.
3. Current limiter circuit
The current limiter circuit operates (to limit the peak current) at a current determined by the formula I = 0.5/Rf
(where Rf = R10). The limiting operation suppresses the current by reducing the on duty. No phase compensation
capacitor is required.
No. 4263-7/11
LB1823
Part
Function
Description
C1
Power supply stabilization
Choose a value such that the voltage fluctuations due to the motor drive currents are
stabilized.
C2
IC power supply stabilization
Attach as close as possible to pins 17 and 24.
R1, C3
PWM frequency setting
Use a resistor of 30 kΩ or larger for R1.
C4, C5, R2
External crystal oscillator circuit
See the figure on page 6.
C6, C7, R3, R4, R5
Servo constants
IC internal power supply
If the capacitance of this capacitor is too small, it will become harder to reset the internal IC
C8
stabilization
logic reliably and incorrect logic operation may occur. Attach as close as possible to pins 11
Reset pulse generation
and 24.
C9, C10, R7, R8
FG amplifier gain and frequency
characteristics settings
R10
Limit current setting
Output current IOUT = VRF/R10
R11, R12
Hall element bias current settings
R13, R14, R15
Sink current settings
These resistors set the sink currents for the UL, VL and WL (open collector) outputs.
R16
Shunt regulator bias current
Select a value such that a current of over 1 mA flows in the VM voltage range for which
settings
guaranteed correct operation is desired.
R17, R18, R19
Pull-down resistors
These resistors speed up the motor drive output transistor off times.
R20
Start time assurance
Include R20 in applications in which the start up time is a problem.
D1, D2, D3
Regeneration current absorption
Use Schottky diodes for D1, D2 and D3.
相关PDF资料 |
PDF描述 |
|---|---|
| LB1889M | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDSO36 |
| LB1889D | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDIP28 |
| LB1923M | BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PQFP44 |
| LB1946 | STEPPER MOTOR CONTROLLER, 1.75 A, PDFM28 |
| LC5511D | POWER FACTOR CONTROLLER, 18 kHz SWITCHING FREQ-MAX, DIP7 |
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 |
发布紧急采购，3分钟左右您将得到回复。