Overview
The LB11920-E, produced by onsemi, is a three-phase power brushless motor driver IC designed for direct PWM (Pulse Width Modulation) control. This IC is suitable for a wide range of applications, including office automation and other industrial uses. It supports a broad voltage range of 9.5V to 30V, making it versatile for various power requirements.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Maximum Source Voltage | VM | - | - | - | 35 | V |
| Maximum Output Current | I_O | T≦500ms | - | - | 3.5 | A |
| Maximum Output Voltage | V_OUT | - | - | - | 35 | V |
| Operating Ambient Temperature | T_opr | - | -20 | - | 80 | ℃ |
| Storage Ambient Temperature | T_stg | - | -55 | - | 150 | ℃ |
| Power Dissipation (Single IC) | Pd_max1 | - | - | - | 3 | W |
| Power Dissipation (With Heat Sink) | Pd_max2 | - | - | - | 20 | W |
Key Features
- Three-Phase Bipolar Drive: Supports 35V, 3.5A output.
- Direct PWM Drive: Allows control via PWM duty input.
- Internal Diodes: Includes output upper and lower kickback absorption diodes.
- Brake Function: Features short brake functionality.
- Forward/Reverse Switching: Includes forward/reverse switching circuit.
- Protection Circuits: Includes current limit, low voltage protection, motor lock protection, and overheat protection circuits.
- Hall Input: Supports Hall sensor input for 3-phase motor control.
- PWM Input: Allows PWM pulse input for motor control.
- Start/Stop Control: Features start/stop control via S/S pin.
Applications
The LB11920-E is suitable for various applications, including:
- Office automation equipment.
- Industrial machinery.
- Automotive systems (where applicable).
- Other applications requiring three-phase brushless motor control.
Q & A
- What is the voltage range supported by the LB11920-E?
The LB11920-E supports a voltage range of 9.5V to 30V.
- What is the maximum output current of the LB11920-E?
The maximum output current is 3.5A.
- Does the LB11920-E have built-in protection circuits?
- How is the motor controlled using the LB11920-E?
The motor is controlled via PWM duty input and Hall sensor inputs.
- What is the operating temperature range of the LB11920-E?
The operating temperature range is -20°C to 80°C.
- Can the LB11920-E be used in automotive applications?
While it is primarily designed for industrial and office automation, it may be used in automotive systems where applicable, but specific automotive certifications should be checked.
- How is the brake function controlled in the LB11920-E?
The brake function is controlled via the BR pin, where a low level or open state activates the brake.
- What is the purpose of the CSD pin in the LB11920-E?
The CSD pin is used to set the motor lock protection time by connecting a capacitor (approximately 10μF) between CSD and GND.
- How is the forward/reverse switching controlled in the LB11920-E?
The forward/reverse switching is controlled via the F/R pin, where a high level sets forward and a low level sets reverse.
- What is the significance of the PWMIN pin in the LB11920-E?
The PWMIN pin is used to input PWM pulses for controlling the motor, where a low level turns the output on and a high level or open state turns the output off.
