LM74800 Series

3-V to 65-V back-to-back NFET ideal diode controller, -55°C to 125°C

Catalog

3-V to 65-V back-to-back NFET ideal diode controller, -55°C to 125°C

Part	Ratio - Input:Output [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Supplier Device Package	Current - Supply	Package / Case	Type	Current - Output (Max) [Max]	Internal Switch(s)	Applications	FET Type	Delay Time - OFF	Delay Time - ON
Texas Instruments LM74801MDRRR	1:1	125 °C	-55 °C	65 V	3 V	Surface Mount Wettable Flank	12-WSON (3x3)	413 µA	12-WFDFN Exposed Pad	N+1 ORing Controller	2.6 A		General Purpose	N-Channel
Texas Instruments LM74800MDRRR	1:1	125 °C	-55 °C	65 V	3 V	Surface Mount Wettable Flank	12-WSON (3x3)	413 µA	12-WFDFN Exposed Pad	N+1 ORing Controller	2.6 A		General Purpose	N-Channel	500 ns	2.6 µs

Catalog

3-V to 65-V back-to-back NFET ideal diode controller, -55°C to 125°C

Key Features

• Qualified for extended temperature applicationsDevice temperature: –55°C to +125°C ambient operating temperature range3-V to 65-V input rangeReverse input protection down to –65 VDrives external back-to-back N-channel MOSFETs in common drain and common source configurationsIdeal 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 current2.6-A peak DGATE turnoff currentAdjustable overvoltage protectionLow 2.87-µA shutdown current (EN/UVLO = Low)Available in space saving 12-pin WSON packageQualified for extended temperature applicationsDevice temperature: –55°C to +125°C ambient operating temperature range3-V to 65-V input rangeReverse input protection down to –65 VDrives external back-to-back N-channel MOSFETs in common drain and common source configurationsIdeal 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 current2.6-A peak DGATE turnoff currentAdjustable overvoltage protectionLow 2.87-µA shutdown current (EN/UVLO = Low)Available in space saving 12-pin WSON package

Description

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. 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.