驅動程式或資料庫
DRV3946-Q1-DESIGN — DRV3946-Q1 Datasheet
DRV3946-Q1 Datasheet
DRV3946-Q1
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Compliant
- Developed for functional safety applications
- Documentation to aid ISO26262 system design is available
- Systematic integrity up to ASIL D
- Hardware integrity up to ASIL C
- Highly integrated solenoid driver targeted at automotive EV contactor relay and solenoid control applications
- Integration of power supplies, current regulation, diagnostics, and safety functions
- High-efficiency solenoid driving with configurable peak and hold current settings
- Built-in-self-test and diagnostic functions for power supplies, interfaces, drivers, and monitors
- Architecture for reliable operation with redundant power supplies, low-side and high-side drivers, and secondary monitoring logic
- Up to 28V (40V abs. max) operating voltage
- Integrated modified half-bridge
- For charging, recirculation and clamping
- Typical RDS(ON): 37mΩ (low-side), 57mΩ (high-side)
- Quick Turn Off with integrated clamp circuits
- High-side clamp with redundant low-side clamp
- Low-side load control by single wire connection
- Allows external high-side switch for redundant shut-off
- ± 5% accurate Low and High-side current sense
- Analog load current feedback pin (IPROPI)
- Internal control mode:
- Closed loop PWM current regulation
- Configurable peak time, peak and hold currents
- External control mode:
- Vary duty cycle at fixed PWM frequency
- Vary PWM frequency at fixed duty cycle
- 4-wire, addressable, 24-bit SPI with CRC
- Allows multiple devices to operate on same SPI
- All devices on shared SPI bus can receive broadcast commands
- Comprehensive protection and diagnostics:
- Device built-in-self-test
- Load monitoring for open/short detection
- Sensing loss of control during driver ON and OFF
- Forced relay open for undercurrent or undervoltage
- Redundant pin shut-off
- Fault notification on nFAULT pin
The DRV3946-Q1 is a highly integrated solution to drive two solenoids for automotive applications such as contactor relays in EV battery management systems. It includes power supplies, current sensing and current regulation, configurable peak and hold currents and associated timings, and diagnostics and protection functions. It also incorporates several unique functions that enhance performance compared to traditional discrete solenoid drivers. These functions include integrated redundant clamp circuits to quickly discharge the load current, an addressable SPI, and modified half-bridge driver stage with low on-resistance switches.
The device controls solenoid loads through a single wire low-side connection and can pair with an external high-side switch (that can be shared) for redundant shut-off function. Integrated switches perform charging, recirculation and clamping. The device supports internal and external current control modes. The PWM frequency is configurable, with added low frequency dithering using automatic pseudo random frequencies generation and wave shaping. Internal PWM current control loop leads to reduced software development, since MCU current control loop is not needed. The DRV3946-Q1 supports flexible current control parameters to support wide range of solenoid types. Configurable peak and hold current and corresponding timing parameters allow system level power saving.
The DRV3946-Q1 is targeted to be functional safety-compliant, with ASIL-C rated functional safety goal for relay control and avoiding unintended operation. The device supports comprehensive protection and diagnostic features, such as continuous monitoring of load for open and short detection, on and off-state diagnostics, voltage monitors, short protection and high voltage rated IOs.
An addressable SPI allows multiple devices to be controlled on a shared SPI bus. In addition to reducing required MCU resources, the addressable SPI incorporates a broadcast command structure that can enable all devices on the shared addressed bus to take certain actions simultaneously. The SPI incorporates multiple robustness functions including a CRC, address readback capability, and various bus fault detection mechanisms.
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檢視所有 3 | 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | DRV3946-Q1 Dual Channel Automotive Solenoid Driver with Current Regulation, Clamping and Diagnostics datasheet (Rev. A) | PDF | HTML | 2024年 6月 12日 |
| Technical article | 爆管和接觸器驅動器如何協助 HEV/EV 電池斷開系統提高安全 性和效率 (Rev. A) | PDF | HTML | 2025年 5月 1日 | |
| White paper | 設計更安全、更智慧且更緊密相連的電池管理系統 (Rev. A) | PDF | HTML | 2025年 4月 3日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
開發板
DRV3946-Q1EVM — DRV3946-Q1 評估模組
DRV3946-Q1EVM 可輕鬆控制及評估 DRV3946-Q1 雙通道完全整合式電磁及接觸器驅動器。DRV3946-Q1EVM 包含兩個 DRV3946-Q1 IC，各能驅動兩個配置於低壓側的接觸器。DRV3946-Q1 的兩個輸出通道各能驅動最高 9 A 電流，總電流可達 18 A。評估模組配備 20 A 保險絲，可在電流大幅增加時中斷電源與電路板其他部分的連接。
使用指南: PDF
設計工具
DRV3946-Q1EVM-DESIGN — DRV3946-Q1EVM Design Files
Folder contains datasheet of DRV3946-Q1EVM design files, user guide, firmware source code and GUI installer
支援產品和硬體
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 28 | Ultra Librarian |
訂購與品質
內含資訊：
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中的可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。