Overview
The LV8907UWR2G, produced by onsemi, is a high-performance, sensorless three-phase Brushless DC (BLDC) motor controller designed specifically for automotive applications. This device integrates predrivers for driving six N-MOSFETs and features a two-stage charge pump to support continuous 100% duty cycle operation. It offers advanced system protection and diagnostic functions, including overcurrent, overvoltage, short-circuit, undervoltage, and overtemperature protection. The LV8907UWR2G supports both open-loop and closed-loop speed control with configurable startup, speed settings, and proportional/integral (PI) control coefficients, making it versatile for various motor and load combinations.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| Operating Junction Temperature | °C | -40 | - | 175 |
| Operating Voltage Range | V | 5.5 | - | 20 |
| Supply Voltage Tolerance | V | 4.5 | - | 40 |
| Internal Charge Pump Oscillator Frequency | kHz | 49.6 | 52.1 | 54.6 |
| Boost Voltage (VS = 6.0 V to 8.0 V) | V | VS + 6.0 | VS + 12.0 | VS + 14.0 |
| High-side Output Current (pulsed, duty 5%) | mA | - | - | 400 |
| Low-side Output Current (pulsed, duty 5%) | mA | - | - | 400 |
| 5 V / 3.3 V Regulator Output Current | mA | - | - | 50 |
Key Features
- AEC-Q100 Qualified and PPAP Capable
- Embedded proprietary sensorless trapezoidal and pseudo-sinusoidal commutation
- Supports open-loop and closed-loop speed control with user-configurable startup, speed settings, and PI control coefficients
- Integrated predrivers for driving six N-MOSFETs
- Two-stage charge pump for continuous 100% duty cycle operation
- 5 V / 3.3 V regulator, LIN transceiver, and watchdog timer
- Various system protection features including overcurrent, overvoltage, short-circuit, undervoltage, and overtemperature protection
- Configurable speed settings and PI control coefficients
- SPI interface for parameter setting and system status monitoring
- Embedded one-time programmable (OTP) non-volatile memory and RAM system memory
Applications
- Pumps (fuel, oil, coolant, hydraulic controls, vacuum, etc.)
- Fans and blowers (HVAC, radiator, condenser, battery, inverter, charger, etc.)
- Compressors
Q & A
- What is the LV8907UWR2G used for?
The LV8907UWR2G is a high-performance, sensorless three-phase BLDC motor controller designed for automotive applications.
- What are the key protection features of the LV8907UWR2G?
The device includes overcurrent, overvoltage, short-circuit, undervoltage, and overtemperature protection.
- What types of speed control does the LV8907UWR2G support?
The device supports both open-loop and closed-loop speed control with user-configurable startup, speed settings, and PI control coefficients.
- What is the operating junction temperature range of the LV8907UWR2G?
The operating junction temperature range is from -40°C to 175°C.
- What is the purpose of the two-stage charge pump in the LV8907UWR2G?
The two-stage charge pump provides gate current for a wide range of ultra-low RDS(ON) NFETs and supports continuous 100% duty cycle operation.
- Does the LV8907UWR2G have integrated power supplies?
Yes, it includes an internal 3.3 V regulator, a configurable 5 V or 3.3 V VCC regulator for external circuits, and a dual-stage charge pump.
- How does the LV8907UWR2G handle system errors?
The device includes auto-run settings and can restart after standby mode in case of system errors such as missing control signals or watchdog errors.
- What communication interfaces are available on the LV8907UWR2G?
The device features an SPI interface for parameter setting and system status monitoring, as well as a LIN transceiver.
- Can the LV8907UWR2G be used with external microcontrollers?
Yes, it can be combined with a small microcontroller for more complex operations and flexibility.
- What are the typical applications of the LV8907UWR2G?
Typical applications include pumps, fans and blowers, and compressors.
