AP74701Q

Description

The AP74701Q is an automotive AEC-Q100 qualified ideal diode controller, which operates in conjunction with an external n-channel MOSFET as an ideal diode for minimum loss reverse-polarity protection with a 20mV forward voltage drop. The AP74701Q is suitable for input protection of 12V automotive systems. The 3.2V input-voltage support is particularly well suited for severe cold crank requirements in automotive systems.

The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20mV. The regulation scheme enables immediate turn-off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Immediate response (< 0.75μs) to reverse current blocking makes the device suitable for systems with output voltage hold-up requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.

The AP74701Q has a built-in VDS clamp feature which enables users to achieve “TVS Less” input polarity protection solution and save on average a typical 60% of PCB space in constrained automotive systems. The AP74701Q controller provides a charge pump gate drive for an external n-channel MOSFET. With the enable pin low, the controller is off and draws approximately 1μA of current.

The AP74701Q is available in the SOT28 package.

Feature(s)

• Input Voltage Ranges from 3.2V to 65V (3.9V Startup)
• -33V Reverse-Battery Voltage
• Charge Pump for External N-Channel Power MOSFET
• 20mV ANODE to CATHODE Forward Voltage Drop Control
• Low Shutdown Current of 1µA when Disabled
• Low Quiescent Current of 80µA when Enabled
• Fast Reverse Current Block Response Time of < 0.75µs
• 3A Peak Gate Turn-Off Current
• Active High Operation
• Integrated Battery Voltage Monitoring Switch (SW)
• Meet Automotive ISO7637 Transient Requirements Without Additional Input TVS Diodes (TVS Less)
• ESD Protection: 2kV of HBM and 750V of CDM
• AEC-Q100 Qualification Compliance with Device Temperature Grade 1 (-40°C to +125°C Ambient Operating Temperature Range)
• 8-Pin SOT28 Package
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• The AP74701Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Application(s)

• Automotive infotainment systems – head units, telematics, control units
• Automotive ADAS systems - cameras
• Active power ORing for redundant power
• Power of industrial automation such as PLC
• Enterprise power supplies