LM7480
- Qualified for extended temperature applications
- Device temperature: –55°C to +125°C ambient operating temperature range
- 3-V to 65-V input range
- Reverse input protection down to –65 V
- Drives external back-to-back N-channel MOSFETs in common drain and common source configurations
- Ideal diode operation with 10.5-mV A to C forward voltage drop regulation (LM74800)
- Low reverse detection threshold (–4.5 mV) with fast response (0.5 µs)
- 20-mA peak gate (DGATE) turnon current
- 2.6-A peak DGATE turnoff current
- Adjustable overvoltage protection
- Low 2.87-µA shutdown current (EN/UVLO = Low)
- Available in space saving 12-pin WSON package
The LM7480 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 overvoltage protection. The wide input supply of 3 V to 65 V allows protection and control of 12-V and 24-V input powered systems. 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. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) and overvoltage protection using HGATE control. The device features an adjustable overvoltage cut-off protection feature. LM7480 has two variants, LM74800 and LM74801. LM74800 employs reverse current blocking using linear regulation and comparator scheme versus LM74801, which supports a comparator based scheme. With common-drain configuration of the power MOSFETs, the mid-point can be utilized for ORing designs using another ideal diode. The LM7480 has a maximum voltage rating of 65 V. The loads can be protected from extended overvoltage transients like 200-V unsuppressed load dumps in 24-V battery systems by configuring the device with external MOSFETs in common source topology.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM7480 3-V to 65-V, Ideal Diode Controller Driving Back to Back NFETs datasheet | PDF | HTML | 2022年 12月 21日 |
設計與開發
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LM74800EVM-CD — LM74800-Q1 理想二極體控制器評估模組
TI 的評估模組 LM74800EVM-CD 可協助設計人員評估 LM7480-Q1 理想二極體控制器 (LM74800QDRR 和 LM74801QDRR) 在反向電池保護應用中的運作及性能。此評估模組展示 LM7480-Q1 如何控制兩個背對背 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。
LM74800EVM-CS — LM7480-Q1 理想二極體控制器評估模組
TI 的評估模組 LM74800EVM-CD 可協助設計人員評估 LM7480-Q1 理想二極體控制器 (LM74800QDRR 和 LM74801QDRR) 在反向電池保護應用中的運作及性能。此評估模組展示 LM7480-Q1 如何控制兩個背對背 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。
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DRR) | 12 | Ultra Librarian |
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