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参数资料
| 型号： | LB1695M |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2 A, PDSO30 |
| 封装： | MFP-30 |
| 文件页数： | 5/7页 |
| 文件大小： | 248K |
| 代理商： | LB1695M |
LB1695M Functional Description
1. Hall input circuit
The Hall input circuit is a differential amplifier with a hysteresis of 30 mV (typical). The operating DC level must fall
within the common-mode input voltage range (1.5 V to VCC - 1.8 V). We recommend providing inputs with a swing
of at least three times the hysteresis, i.e. 120 to 160 mV p-p, to prevent noise from interfering with circuit operation.
Insert capacitors in the Hall amplifier IN+ and IN– inputs if capacity is found to be problematic during noise
evaluation.
2. Protection circuits
Low voltage protection circuit
If the VCC voltage falls below a stipulated level (VLVSD), the sink side output transistor is turned off. This circuit
prevents incorrect operation at low VCC voltages.
Thermal protection circuit
If the junction temperature exceeds a stipulated temperature (TSD), the sink side output transistor is turned off. This
circuit protects the IC from thermal damage. Applications must be designed so that this circuit only operates in
abnormal conditions.
3. FG output circuit
This circuit outputs signals that are synthesized from the IN1, IN2, and IN3 Hall amplifier input signals and to which
wave shaping has been applied. FG1 has the same frequency as the Hall inputs, and FG2 has a frequency three times
that of the Hall inputs.
4. Forward/reverse control circuit
This IC is designed assuming that applications will not perform motor forward/reverse (F/R) control operations while
the motor is turning. Through currents will flow in the output if the motor direction is switched while the motor is
turning and ASO will become a problem. We recommend performing F/R control operations with the VM power
supply in the off state, i.e. when the motor is stopped.
5. VCC and VM power supplies
If the power supply slew rate at power on is excessive, through currents will flow in the output and ASO will become
a problem. The power supply slew rates must not exceed ΔVCC/Δt = 0.04 V/μs and ΔVM/Δt = 0.16 V/μs. Also, at
power on it is desirable to bring up the VCC voltage first, and then bring up the VM voltage. At power off, it is
desirable to bring down VM first, and then bring down VCC only after the motor has stopped. If VCC is turned off
after VM but while the motor is still turning due to inertia, the VM voltage may rise beyond the voltage handling
capacity of the IC.
6. Power supply stabilization capacitors
If large fluctuation occur in the VCC line, the low-voltage protection circuit may operate incorrectly. Capacitors (with
values of a few μF) must be inserted in the VCC line (between VCC and ground) to stabilize the power supply. Since
large switching current flow in the VM line, fluctuations in the IC VM voltage may occur due to inductances in the
wiring pattern. Capacitors must be inserted in the VM line (between VM and ground) so that incorrect operation and
voltages in excess of the IC voltage handling capacity do not occur. In particular, if the application wiring lines (VM,
VCC, and ground) are long, capacitors adequate to stabilize the power supply lines must be used.
7. Current limiter circuit
When the output current reaches the current set as the output current (the limit value), the current limiter circuit turns
off the sink side output transistor to limit the output current to the limit value. The RF pin is used to detect the output
current. In particular, the output current is detected as a voltage using the Rf resistor, which is inserted between the
RF pin and ground. The current limiter operates when the Rf pin reaches 0.5 V (typical) and thus the output current is
limited to a value of 0.5/Rf.
Output off time
After the current limiter circuit operates and limits the current by turning off the sink side output transistor, it provides
a fixed off period (referred to as the output off time), after which it turns the transistor back on. As opposed to current
limiter techniques that operated the output in an unsaturated state, the use of an output switching system of this type for
the current limiter has the advantage that ASO during current limiter operation is less likely to be a problem. The
output off time is determined by the charging time of the capacitor connected to the C pin. When the current limiter
operates, the circuit starts to charge the C pin capacitor, and the output off time is the time required to charge the
capacitor to a voltage of 2 V (typical). When the capacitor voltage reaches 2 V, the sink side output is turned on again.
The capacitor charge current is a fixed current determined by the resistor R connected to the R pin. The C charge
No. 5802-5/7
LB1695M
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LB1696 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:3-phase Brushless Motor Driver |
| LB1696-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 |
| LB16CGG01 | 功能描述:按钮开关 SPDT ON-ON GRAY ROUND BODY ONLY RoHS:否 制造商:C&K Components 触点形式:2 NC - 2 NO 开关功能:ON ? OFF 电流额定值:4 A 电压额定值 AC:12 V to 250 V 电压额定值 DC:12 V to 50 V 功率额定值: 安装风格:Through Hole 照明:Illuminated 照明颜色:None IP 等级:IP 40 端接类型:Solder 触点电镀:Silver 执行器:Square 盖颜色: 封装: 可燃性等级:UL 94 V-0 |
| LB16CGG01-05-BJ | 制造商:NKK 制造商全称:Nihon Kaiheiki Industry Co. Ltd. 功能描述:Standard Size Pushbuttons |
| LB16CGG01-12-BJ | 制造商:NKK 制造商全称:Nihon Kaiheiki Industry Co. Ltd. 功能描述:Standard Size Pushbuttons |
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