計算工具
FET-INRUSH-SOA-CALC — FET SOA margin calculator for dvdt based startup
The design calculator allows user to estimate the FET SOA margin while starting up with dVdt based startup for inrush current control
LM7481-Q1
- AEC-Q100 qualified for automotive applications
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
- 3-V to 65-V input range
- Reverse input protection down to –65 V
- Drives external back to back N-channel MOSFETs
- Ideal diode operation with 9.1-mV A to C forward voltage drop regulation
- Low reverse detection threshold (–4 mV) with fast response (0.5 µs)
- Active rectification up to 200-KHz
- 60-mA peak gate (DGATE) turn-on current
- 2.6-A peak DGATE turnoff current
- Integrated 3.8-mA charge pump
- Adjustable over voltage protection
- Low 2.87 µA shutdown current (EN/UVLO=Low)
- 2.6-A peak DGATE turn-off current
- Meets automotive ISO7637 transient requirements with a suitable TVS diode
- Available in space saving 12-Pin WSON package
The LM74810-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON/OFF control and over voltage protection. The wide input supply of 3 V to 65 V allows protection and control of 12-V and 24-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65 V. An integrated ideal diode controller (DGATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. A strong charge pump of 3.8 mA with 60-mA peak GATE source current driver stage and short turn ON and turn OFF delay times ensures fast transient response ensuring robust and efficient MOSFET switching performance during automotive testing such as ISO16750 or LV124 where an ECU is subjected to input short interruptions and AC superimpose input signals upto 200-KHz frequency. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) and over voltage protection using HGATE control. The device features an adjustable over voltage cut-off protection feature for load dump protection.
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檢視所有 8 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM7481-Q1 Ideal Diode Controller with Active Rectification and Load Dump Protection datasheet (Rev. A) | PDF | HTML | 2020年 12月 7日 |
| Functional safety information | LM7481-Q1 Functional Safety FIT Rate, FMD, and Pin FMA | PDF | HTML | 2024年 4月 5日 | |
| Application note | Basics of Ideal Diodes (Rev. B) | PDF | HTML | 2021年 10月 5日 | |
| EVM User's guide | LM74810 Evaluation Module: LM74810EVM (Rev. A) | PDF | HTML | 2020年 12月 9日 | |
| Analog Design Journal | Automotive EMC-compliant reverse-battery protection with ideal-diode controllers | 2020年 9月 22日 | ||
| Application note | Ideal Diode Controllers for Active Rectification of AC Voltage Ripple | 2020年 6月 30日 | ||
| White paper | 簡化汽車及工業領域的功 能安全認證 | 2020年 6月 9日 | ||
| Application note | Six System Architectures With Robust Reverse Battery Protection | 2020年 4月 30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
LM74810EVM — LM7481-Q1 理想二極體控制器評估模組
TI 的評估模組 LM74810EVM 可協助設計人員評估 LM7481-Q1 理想二極體控制器 (LM74810QDRR) 在反向電池保護應用中的運作及性能。此評估模組展示 LM7481-Q1 理想二極體控制器為高功率 (>100W) 汽車 ECU 設計提供反向電池保護的能力。此裝置控制兩個背對背 N 通道功率 MOSFET，首先連接理想二極體 MOSFET，接著連接第二個 MOSFET，以進行切換輸出及電源路徑切斷。
設計工具
TIDA-020033-TD-DESIGN — TIDA-020033 test documentation
支援產品和硬體
產品
AC/DC 和 DC/DC 控制器 (外部 FET)
類比電流感測放大器
喇叭放大器
理想二極體/ORing 控制器
模擬工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
參考設計
TIDA-020033 — 車用 H 類音訊與追蹤電源供應器參考設計
此參考設計展示 H 類音訊與追蹤電源供應音訊子系統。TAS6584-Q1 音訊放大器可追蹤數位音訊輸入的包絡線，並調整 LM5123-Q1 升壓輸出電壓以符合電源效率需求，無需使用外部微控制器。此參考設計可提升效率、熱性能，且總體積更小。此外，此參考設計也允許 H 類實作隨插即用，對汽車音訊架構的其他部分只有最少的軟體更動。
Design guide: PDF
參考設計
TIDA-020040 — 汽車瞬態和過電流保護濾波器參考設計
This reference design showcases a protection system for voltage and current transient events typically found in automotive systems. This reference design optimizes functionality, size and protection capabilities while not sacrificing power delivery for premium audio amplifiers.
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DRR) | 12 | 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
- 進行中持續性的可靠性監測
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。