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Automotive ideal diode controller with active rectification driving B2B NFETs

Inventory: 2,905
Limit:  250

Quality information

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Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
WSON (DRR) | 12 3,000 | LARGE T&R
-40 to 125
Package | Pins WSON (DRR) | 12
Package qty | Carrier 3,000 | LARGE T&R
Operating temperature range (°C) -40 to 125
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Features for the LM7481-Q1

  • AEC-Q100 Qualified with the following results
    • Device temperature grade 1:
      –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification levelC4B
  • 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 9.5-mV A to C forward voltage drop regulation
  • Fast response to reverse current blocking:
    < 0.6-µs
  • Active rectification up to 200-KHz
  • 50-mA peak gate (DGATE) turn-on current
  • Integrated 3-mA charge pump
  • Adjustable over voltage protection
  • Low 3 µA shutdown current (EN=Low)
  • 1.5-A peak DGATE turn-off current
  • Available in space saving 12-Pin WSON package

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Description for the LM7481-Q1

The LM74810-Q1 ideal diode controller drives and controls external back to back N-ChannelMOSFETs to emulate an ideal diode rectifier with power path ON/OFF control and over voltageprotection. The wide input supply of 3V to 65V allows protection and control of 12-V and 24-Vautomotive battery powered ECUs. The device can withstand and protect the loads from negativesupply voltages down to –65 V. An integrated ideal diode controller (DGATE) drives the first MOSFETto replace a Schottky diode for reverse input protection and output voltage holdup. A strong chargepump of 3mA with 50mA peak GATE source current driver stage and short turn ON and turn OFF delaytimes ensures fast transient response ensuring robust and efficient MOSFET switching performanceduring automotive testing such as ISO16750 or LV124 where an ECU is subjected to input shortinterruptions and AC superimpose input signals upto 200KHz frequency. With a second MOSFET in thepower path the device allows load disconnect (ON/OFF control) and over voltage protection usingHGATE control. The device features an adjustable over voltage cut-off protection feature for loaddump protection.


Qty Price (USD)
1-99 2.616
100-249 2.161
250-999 1.552
1,000+ 1.168