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参数资料
| 型号： | LB11876 |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDSO36 |
| 封装： | 0.275 INCH, SSOP-36 |
| 文件页数： | 6/15页 |
| 文件大小： | 168K |
| 代理商： | LB11876 |
LB11876
No.8317-14/15
8. Constraint protection circuit
The LB11876 includes a built-in constraint protection circuit to protect the IC and the motor if the motor is physically
constrained from turning. If one Hall sensor input signals do not switch states for a period in excess of a certain fixed
time in the start state, the PWM drive side output is turned off. The time is set by the capacitor connected to the CSD
pin.
Set time (seconds)
≈ 15.4 × C (μF)
If a 0.068F capacitor is used, the protection time will be about 1.05 seconds. (If one Hall sensor input signal period
becomes longer than this time, the PWM drive side output is turned off.) This set time must have a certain amount of
margin with respect to the motor startup time. This protection circuit will not operate during deceleration due to
switching the clock frequency. The constraint protection state can be cleared by either switching to the stop state or
turning the power off and then on again.
Since the CSD pin also functions as the initial reset pulse generation pin, connecting this pin to ground will reset the
logic circuits and make speed control operation impossible. Therefore, if the constraint protection circuit is not used,
this pin must be connected to ground by a resistor of about 220k
Ω and a capacitor of about 4700pF connected in
parallel.
9. Undervoltage protection circuit
The LB11876 includes a undervoltage protection circuit to prevent incorrect operation when power is first applied or
when the power supply voltage falls. The LVSD pin turns the PWM drive side output off at voltages under about 3.7V
(typical), and clears the protection state when the voltage rises above about 4.2V (typical). An arbitrary operating
voltage can be set by adding an external Zener diode.
Note that the maximum applied voltage for the LVSD pin is 18V.
10. Phase lock signal
(1) Phase lock range
: Since this IC does not have a speed system counter, the speed error range in the
phase locked state cannot be determined by the IC characteristics alone. (This is because the range is affected by the
acceleration with changes in the FG frequency.) If it is necessary to stipulate this in conjunction with a motor, it will
be necessary to measure the range with the actual motor state. Since speed errors occur easily in states where the FG
acceleration is large, it is thought that the lock pull-in time at startup and the unlock time due to clock switching will
be the cases where the speed error is the largest.
(2) Phase lock signal mask function : It is possible to assure that the lock signal is output in stable states by masking the
short-term low levels due to hunting during lock pull-in. Note, however, that the lock signal output will be delayed
by the amount of the mask time. The mask time is set by the capacitor connected between the CLD pin and ground.
Mask time (seconds)
≈ 0.9 × C (μF)
When a 0.1F capacitor is used, the mask time will be about 90ms. If full masking is required, the mask time must
be set with an adequate margin. Leave the CLD pin open if masking is not required.
11. Power supply stabilization
(1) VCC
: Since this IC is used in switching drive applications with large output currents,
the power supply line is easily disrupted.
Therefore it is necessary to connect an adequately large capacitor between the VCC pin and ground. The capacitor
ground side should be located as close to the IC GND pin as possible.
Since the power supply line is most easily disrupted during lock pull-in at high speeds, designers must analyze this
case carefully and select an adequately large capacitor.
Since the power supply line is particularly susceptible to disruption if a diode is inserted in the power supply line to
prevent destruction of the IC by reverse connection, an even larger capacitor must be selected in this case.
(2) 13V regulator
: When implementing a motor driver circuit with single-voltage power supply
specifications and a voltage that is outside the power supply voltage range of this IC, the supply voltage required by
this IC (approx. 13V) can be created using the V13 pin. The V13 pin circuit is a shunt regulator and can generate a
13V level by supplying current through an external resistor. A stabilized voltage is generating by setting the current
to a level in the range 0.5mA to 4mA. An external transistor with a current capacity of over 80mA (ICC + Hall
sensor bias current + output source current) and a voltage handling capacity higher than the motor supply voltage
must be selected. Since heat generation in the transistor may become a problem, heat dissipation must be provided
by the package.
(3) 5V regulator
: Connect a capacitor with a value over 0.1F to stabilize the VREG voltage,
which is the IC's control circuit power supply. That capacitor's ground side must be connected as close as possible
to the IC ground.
相关PDF资料 |
PDF描述 |
|---|---|
| LB11889M | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDSO36 |
| LB11946 | STEPPER MOTOR CONTROLLER, 1.2 A, PDIP28 |
| LB11946 | STEPPER MOTOR CONTROLLER, 1.2 A, PDIP28 |
| LB11980H | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDSO28 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LB11876-MPB-E | 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| LB11876-TLM-E | 功能描述:马达/运动/点火控制器和驱动器 PRINTER RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| LB-1188 | 制造商:Ideal Industries Inc 功能描述:GRIPPER-SET C/STMLT .109/GRTPD |
| LB11880 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Three-Phase Sensorless Motor Driver with Loading Motor Driver |
| LB11885N | 制造商:SANYO Semiconductor Co Ltd 功能描述:Vcr Deck 3 In 1 Motor Driver Sanyo IC 48-Pin op-Hs SMD |
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