LM74700QDBVRQ1 New Original In Stock Electronic components Integrated IC Circuit

short description:

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.

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Product Detail

Product Tags

Product Attributes

TYPE	DESCRIPTION
Category	Integrated Circuits (ICs) PMIC - OR Controllers, Ideal Diodes
Mfr	Texas Instruments
Series	Automotive, AEC-Q100
Package	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®
Part Status	Active
Type	N+1 ORing Controller
FET Type	N-Channel
Ratio - Input:Output	1:1
Internal Switch(s)	No
Delay Time - ON	1.4 µs
Delay Time - OFF	450 ns
Current - Output (Max)	5A
Voltage - Supply	3.2V ~ 65V
Applications	Automotive
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	SOT-23-6
Supplier Device Package	SOT-23-6
Base Product Number	LM74700

Ideal Diode

What is an Ideal Diode.
An ideal diode is an electrical component that behaves like an ideal conductor when a voltage is applied with a forward bias, and like an ideal insulator when a voltage is applied with a reverse bias. Thus, when a + ve voltage is applied across the anode to the cathode, the diode immediately performs a forward current.
When a reverse bias voltage is applied, it does not execute a current at all. The diode works like a switch. When the diode is in forwarding bias, it acts like a closed switch. Conversely, if an ideal diode is in reverse bias, it operates like a brake switch.
There are several basic electrical and electronic components that we commonly use to build circuits, including resistors, diodes, capacitors, transistors, ICs (integrated circuits), transformers, thyristors, etc.
Diodes are two lethal semiconductor solid-state devices that have non-linear VI characteristics and allow current to flow in only one direction. When a diode is in forwarding bias, its resistance is very low. Likewise, it will impede the flow of current during reverse bias, resulting in very high resistance.

Ideal Diode Classification.
Zener diodes, LEDs, constant-current diodes, general-purpose diodes, varactor diodes, tunnel diodes, ideal diodes, laser diodes, photodiodes, etc.

Product Advantages

Our ideal diode and ORing controllers offer space-saving and scalable solutions to protect your system against reverse voltage or reverse current. These devices significantly reduce the energy typically lost across the forward voltage drop of traditional discrete silicon or Schottky diodes.

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