DRV8421
- Dual H-Bridge Motor Driver
- Single/Dual Brushed DC
- Stepper
- Solenoids
- 4 to 18V Operating Supply Voltage Range
- Low ON-resistance: HS + LS = 900mΩ (Typical, 25°C)
- High Output Current per H-Bridge
- 2A Maximum Driver Current at 12V and TA = 25°C
- Parallel Mode Available Capable of 4A Maximum Driver Current at 12V and TA = 25°C
- Device versions:
- DRV8421A (4-wire input): Independent Half Bridge Control
- DRV8421B (2-wire input): Sleep Mode, Fault detect
- Similar LV Stepper Drivers:
- PWM Control Interface
- Low-Current 3µA Sleep Mode (2-wire input version only)
- Thermally-Enhanced Surface Mount Package
- Protection Features
- VM Undervoltage Lockout (UVLO)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Fault Condition Indication Pin (nFAULT) (2-wire input version only)
The DRV8421 provides a dual H-bridge motor driver for home appliances and other mechatronic applications. The device can be used to drive one or two DC motors, a bipolar stepper motor, or other loads. A simple PWM interface allows easy interfacing to controller circuits.
The output block of each H-bridge driver consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8421 is capable of driving a maximum current of 2A from each output or 4A in parallel mode (with proper heat sinking, at 12V and TA = 25°C).
The device contains two versions having a 4-wire input (DRV8421A) or a 2-wire input (DRV8421B). The 2-wire input version (DRV8421B) contains features like enable and fault detection, while the 4-wire input version (DRV8421A) can drive four half bridges based on signals to four input terminals. A low-power sleep mode is also provided for the 2-wire input version. It shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be set by pulling the enable pin low.
Internal protection functions are provided for UVLO, OCP, short-circuit protection, and overtemperature. Fault conditions are indicated by a nFAULT pin in the DRV8421B, the 2-wire input device.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DRV8421 18V 2A Dual H-Bridge Stepper Driver datasheet | PDF | HTML | 2024年 6月 17日 |
設計與開發
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DRV8421BEVM — DRV8421B 評估模組
DRV8421 評估模組 (EVM) 可用於輕鬆評估 DRV8421 裝置。EVM 已編程並配置為可立即使用並開始轉動馬達。裝置可用於驅動一個或兩個 DC 馬達、雙極步進馬達，或是其他每個輸出最高 2A 的負載，或在並聯模式下為 4A 的負載。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HVSSOP (DGQ) | 10 | Ultra Librarian |
訂購與品質
- 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
- 進行中持續性的可靠性監測
- 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。