Overview
The LB11961-TLM-H is a single-phase bipolar drive motor driver produced by onsemi. This component is designed to implement direct PWM motor drive systems with high efficiency, making it optimal for fan motor drive applications in personal computer power supply systems and CPU cooling fan systems. The LB11961-TLM-H integrates various features to ensure quiet, low-vibration variable speed control and robust protection mechanisms.
Key Specifications
| Parameter | Symbol | Conditions | Ratings | Unit |
|---|---|---|---|---|
| VCC supply voltage | VCC | 4.5 to 16 | V | |
| VTH input level voltage range | VTH | 0 to 9 | V | |
| Hall sensor input common-mode input voltage range | VICM | 0.2 to 3 | V | |
| Circuit current (Drive mode) | ICC1 | 12 to 24 | mA | |
| Circuit current (Lock protection mode) | ICC2 | 8 to 16 | mA | |
| 6VREG voltage | V6VREG | 5.8 to 6.2 | V | |
| HB voltage | VHB | 1.10 to 1.25 | V | |
| Operating Temperature | TA | -30°C to 90°C | °C | |
| Package | 14-HSSOP (225mil) | |||
| Motor Type | Brushed DC | |||
| Output Current | 1A |
Key Features
- Single-phase full-wave drive with built-in 16V, 1.0A transistors.
- Built-in variable speed function controlled by a thermistor input.
- Quiet, low-vibration variable speed control using externally clocked high side transistor direct PWM drive.
- Built-in regenerative diode; requires a minimal number of external components.
- Built-in HB (Hall effect sensor bias constant-voltage output of 1.25V).
- Minimum speed setting pin allows full-speed mode operation at startup.
- Operates in full-speed mode when the thermistor is removed.
- Built-in lock protection and automatic recovery circuits.
- FG (speed detection) and RD (lock detection) outputs.
- Built-in thermal shutdown circuit.
Applications
- Personal computer power supply systems.
- CPU cooling fan systems.
Q & A
- What is the primary function of the LB11961-TLM-H?
The LB11961-TLM-H is a single-phase bipolar drive motor driver designed for fan motor drive applications.
- What is the voltage range for the VCC supply?
The VCC supply voltage ranges from 4.5V to 16V.
- How is the variable speed function controlled?
The variable speed function is controlled by a thermistor input.
- What type of motor does the LB11961-TLM-H support?
The LB11961-TLM-H supports brushed DC motors.
- What is the maximum output current of the LB11961-TLM-H?
The maximum output current is 1A.
- What protection mechanisms are built into the LB11961-TLM-H?
The component includes built-in lock protection, automatic recovery circuits, and a thermal shutdown circuit.
- What is the purpose of the FG and RD outputs?
The FG output is for speed detection, and the RD output is for lock detection.
- How does the LB11961-TLM-H operate when the thermistor is removed?
When the thermistor is removed, the LB11961-TLM-H operates in full-speed mode.
- What is the operating temperature range of the LB11961-TLM-H?
The operating temperature range is from -30°C to 90°C.
- What package type is the LB11961-TLM-H available in?
The LB11961-TLM-H is available in a 14-HSSOP (225mil) package.
