LM74700-Q1 Series
3.2-V to 65-V, 80-uA IQ automotive ideal diode controller
Manufacturer: Texas Instruments
Catalog
3.2-V to 65-V, 80-uA IQ automotive ideal diode controller
| Part | Supplied Contents | Secondary Attributes | Contents | Embedded | Function | Type | Utilized IC / Part | Delay Time - ON | Grade | Ratio - Input:Output [custom] | Current - Output (Max) [Max] | Operating Temperature [Min] | Operating Temperature [Max] | Supplier Device Package | Voltage - Supply [Min] | Voltage - Supply [Max] | Qualification | Delay Time - OFF | Mounting Type | Internal Switch(s) | FET Type | Package / Case | Current - Supply | Applications | Primary Attributes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Texas Instruments | Board(s) | On-Board Test Points | Board(s) | ORing Controller / Ideal Diode | Power Management | LM74700-Q1 | |||||||||||||||||||
 Texas Instruments | N+1 ORing Controller | 1.4 µs | Automotive | 1:1 | 5 A | -40 °C | 125 ¯C | TSOT-23-8 | 3.2 V | 65 V | AEC-Q100 | 450 ns | Surface Mount | N-Channel | SOT-23-8 Thin TSOT-23-8 | ||||||||||
Texas Instruments | N+1 ORing Controller | 1.4 µs | 1:1 | -50 °C | 125 ¯C | TSOT-23-8 | 3.2 V | 65 V | 450 ns | Surface Mount | N-Channel | SOT-23-8 Thin TSOT-23-8 | 80 µA | General Purpose | |||||||||||
 Texas Instruments | N+1 ORing Controller | 1.4 ĩs | Automotive | 1:1 | 5 A | -40 °C | 125 ¯C | SOT-23-6 | 3.2 V | 65 V | AEC-Q100 | 450 ns | Surface Mount | N-Channel | SOT-23-6 | ||||||||||
 Texas Instruments | N+1 ORing Controller | 1.4 µs | 1:1 | -50 °C | 125 ¯C | TSOT-23-8 | 3.2 V | 65 V | 450 ns | Surface Mount | N-Channel | SOT-23-8 Thin TSOT-23-8 | 80 µA | General Purpose | |||||||||||
 Texas Instruments | Board(s) | ORing Controller / Ideal Diode | Power Management | LM74700-Q1 | 1-Channel (Single) |
Key Features
• AEC-Q100 qualified with the following resultsDevice temperature grade 1: –40°C to +125°C ambient operating temperature rangeDevice HBM ESD classification level 2Device CDM ESD classification level C4BFunctional Safety-CapableDocumentation available to aid functional safety system design3.2-V to 65-V input range (3.9-V start up)–65-V reverse voltage ratingCharge pump for external N-Channel MOSFET20-mV ANODE to CATHODE forward voltage drop regulationEnable pin feature1-µA shutdown current (EN=Low)80-µA operating quiescent current (EN=High)2.3-A peak gate turnoff currentFast response to reverse current blocking: < 0.75 µsMeets automotive ISO7637 transient requirements with a suitable TVS DiodeAvailable in 6-pin and 8-pin SOT-23 Package 2.90 mm × 1.60 mmAEC-Q100 qualified with the following resultsDevice temperature grade 1: –40°C to +125°C ambient operating temperature rangeDevice HBM ESD classification level 2Device CDM ESD classification level C4BFunctional Safety-CapableDocumentation available to aid functional safety system design3.2-V to 65-V input range (3.9-V start up)–65-V reverse voltage ratingCharge pump for external N-Channel MOSFET20-mV ANODE to CATHODE forward voltage drop regulationEnable pin feature1-µA shutdown current (EN=Low)80-µA operating quiescent current (EN=High)2.3-A peak gate turnoff currentFast response to reverse current blocking: < 0.75 µsMeets automotive ISO7637 transient requirements with a suitable TVS DiodeAvailable in 6-pin and 8-pin SOT-23 Package 2.90 mm × 1.60 mm
Description
AI
The LM74700-Q1 is an automotive AEC Q100 qualified ideal diode controller which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V and 48-V automotive battery systems. The 3.2-V input voltage support is particularly well suited for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.
The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75 µs) to Reverse Current Blocking makes the device suitable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.
The LM74700-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700-Q1 helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current.
The LM74700-Q1 is an automotive AEC Q100 qualified ideal diode controller which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V and 48-V automotive battery systems. The 3.2-V input voltage support is particularly well suited for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.
The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75 µs) to Reverse Current Blocking makes the device suitable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.
The LM74700-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700-Q1 helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current.