LM74502H-Q1 Series

Automotive reverse polarity protection controller, overvoltage protection, gate drive strength 11 mA

Catalog

Automotive reverse polarity protection controller, overvoltage protection, gate drive strength 11 mA

Part	Function	Primary Attributes [Min]	Primary Attributes [Max]	Supplied Contents	Utilized IC / Part	Type	Package / Case	FET Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Current - Output (Max) [Max]	Current - Supply	Delay Time - OFF	Ratio - Input:Output [custom]	Grade	Delay Time - ON	Mounting Type
Texas Instruments LM74502EVM	Ideal Diode Controller	3 V	40 V	Board(s)	LM74502 LM74502H	Power Management
Texas Instruments LM74502HQDDFRQ1						Source Selector Switch	SOT-23-8 Thin TSOT-23-8	N-Channel	60 V	4 V	-40 °C	125 ¯C	TSOT-23-8	2 A	45 µA	2 µs	1:1	Automotive	75 µs	Surface Mount
Texas Instruments LM74502QDDFRQ1						Source Selector Switch	SOT-23-8 Thin TSOT-23-8	N-Channel	60 V	4 V	-40 °C	125 ¯C	TSOT-23-8	2 A	45 µA	2 µs	1:1	Automotive	75 µs	Surface Mount
Texas Instruments LM74502HDDFR						Source Selector Switch	SOT-23-8 Thin TSOT-23-8	N-Channel	60 V	4 V	-40 °C	125 ¯C	TSOT-23-8	2.3 A	45 µA	2 µs	1:1	Automotive	75 µs	Surface Mount

Catalog

Automotive reverse polarity protection controller, overvoltage protection, gate drive strength 11 mA

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 C4B3.2-V to 65-V input range (3.9-V start-up)–65-V input reverse voltage ratingIntegrated charge pump to driveExternal back-to-back N-Channel MOSFETsExternal high side switch MOSFETExternal reverse polarity protection MOSFETGate drive variantsLM74502-Q1: 60-µA peak gate drive source capacityLM74502H-Q1: 11-mA peak gate drive source capacity2-A peak gate sink capacity1-µA shutdown current (EN/UVLO = Low)45-µA typical operating quiescent current (EN/UVLO = High)Adjustable overvoltage and undervoltage protectionMeets automotive ISO7637 pulse 1 transient requirements with additional TVS diodeAvailable in 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 C4B3.2-V to 65-V input range (3.9-V start-up)–65-V input reverse voltage ratingIntegrated charge pump to driveExternal back-to-back N-Channel MOSFETsExternal high side switch MOSFETExternal reverse polarity protection MOSFETGate drive variantsLM74502-Q1: 60-µA peak gate drive source capacityLM74502H-Q1: 11-mA peak gate drive source capacity2-A peak gate sink capacity1-µA shutdown current (EN/UVLO = Low)45-µA typical operating quiescent current (EN/UVLO = High)Adjustable overvoltage and undervoltage protectionMeets automotive ISO7637 pulse 1 transient requirements with additional TVS diodeAvailable in 8-pin SOT-23 package 2.90 mm × 1.60 mm

Description

The LM74502-Q1, LM74502H-Q1 is an automotive AEC-Q100 qualified controller which operates in conjunction with an external back-to-back connected N-channel MOSFETs as a low loss reverse polarity protection and load disconnect solution. 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 LM74502-Q1, LM74502H-Q1 does not have reverse current blocking and is suitable for input reverse polarity protection of loads that can potentially deliver energy back to the input supply such as automotive body control module motor loads. The LM74502-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74502-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, thus offering low system current when put into sleep mode. LM74502-Q1 offers programmable overvoltage and undervoltage protection which cuts off the load from the input source in case of these faults. The LM74502-Q1, LM74502H-Q1 is an automotive AEC-Q100 qualified controller which operates in conjunction with an external back-to-back connected N-channel MOSFETs as a low loss reverse polarity protection and load disconnect solution. 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 LM74502-Q1, LM74502H-Q1 does not have reverse current blocking and is suitable for input reverse polarity protection of loads that can potentially deliver energy back to the input supply such as automotive body control module motor loads. The LM74502-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74502-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, thus offering low system current when put into sleep mode. LM74502-Q1 offers programmable overvoltage and undervoltage protection which cuts off the load from the input source in case of these faults.