Overview
The DRV8908-Q1 from Texas Instruments is a multi-channel half-bridge driver designed for automotive applications. This device is part of the DRV89xx-Q1 family, which offers pin-to-pin compatibility across various models with 4 to 12 half-bridge outputs. The DRV8908-Q1 specifically features 8 half-bridge outputs, making it suitable for controlling multiple brushed DC motors and solenoids. It operates within a voltage range of 4.5-V to 32-V and supports both 3.3-V and 5-V logic inputs.
The device includes advanced protection features such as overcurrent protection, undervoltage lockout, overvoltage protection, and thermal warning and shutdown. It also supports SPI communication for configuration and diagnostics, enabling detailed fault monitoring and control.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Half-Bridge Outputs | 8 |
| Operating Voltage Range | 4.5-V to 32-V |
| Absolute Maximum Voltage | 40-V |
| RMS Current per Output | 1-A |
| Logic Input Voltage | 3.3-V and 5-V |
| SPI Communication Speed | 5 MHz, 16-Bit |
| PWM Resolution | 8-bit duty cycle resolution |
| Protection Features | Overcurrent protection, undervoltage lockout, overvoltage protection, thermal warning and shutdown |
| Package Type | 24-Pin HTSSOP with Exposed Thermal Pad |
| Low-Power Sleep Mode Current | 1.5-µA |
Key Features
- Low on-state resistance (RDS(ON)) for efficient operation.
- Support for individual half-bridge PWM operation and configurable for high-side, low-side, and H-bridge load driving.
- Integrated protection features including overcurrent protection, undervoltage lockout, overvoltage protection, and thermal warning and shutdown.
- Enhanced open load detection (OLD) and fault indicator output (nFAULT) for detailed diagnostics over SPI.
- Low-power sleep mode with a current consumption of 1.5-µA.
- SPI interface for configuration and diagnostics with daisy chain functionality.
Applications
- HVAC flap DC motors.
- Side mirror adjustment and mirror fold.
- LED applications.
- Multiple brushed DC motors and solenoids.
Q & A
- What is the operating voltage range of the DRV8908-Q1?
The DRV8908-Q1 operates within a voltage range of 4.5-V to 32-V.
- How many half-bridge outputs does the DRV8908-Q1 have?
The DRV8908-Q1 features 8 half-bridge outputs.
- What is the RMS current rating per output for the DRV8908-Q1?
Each output is rated for 1-A RMS current.
- Does the DRV8908-Q1 support SPI communication?
- What protection features are integrated into the DRV8908-Q1?
The device includes overcurrent protection, undervoltage lockout, overvoltage protection, and thermal warning and shutdown.
- What is the package type of the DRV8908-Q1?
The DRV8908-Q1 is packaged in a 24-Pin HTSSOP with an exposed thermal pad.
- How much current does the DRV8908-Q1 consume in low-power sleep mode?
The device consumes 1.5-µA in low-power sleep mode.
- Can the DRV8908-Q1 be used for multiple brushed DC motors?
- Does the DRV8908-Q1 support daisy chain functionality?
- What is the PWM resolution of the DRV8908-Q1?
The PWM resolution is 8-bit duty cycle resolution.
