VB40170CHM3/I

Series:	Automotive, AEC-Q101, TMBS®
Part Status:	Obsolete
Diode Configuration:	1 Pair Common Cathode
Diode Type:	Schottky
Voltage - DC Reverse (Vr) (Max):	170V
Current - Average Rectified (Io) (per Diode):	20A
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 20A
Speed:	Fast Recovery = 200mA (Io)
Current - Reverse Leakage @ Vr:	250µA @ 170V
Operating Temperature - Junction:	-40°C ~ 175°C
Mounting Type:	Surface Mount
Package / Case:	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Supplier Device Package:	TO-263AB

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Introduction

The VB-40170CHM3/I is a rectifier array integrated circuit (IC) with two separate channels and a maximum voltage that can be applied to the output of 40V. On-state current is limited to 0.8A. This IC incorporates an N-type MOSFET, a P-type MOSFET and a Schottky barrier diode in parallel between cathode and anode. The MOSFETs in each channel are pulsed to alternately enable and disable RECT1 and RECT2, thus allowing a bidirectional flow of current by reversing the voltage applied to the anode and cathode. When the voltage between anode and cathode gets higher than the turn-on voltage (40V, maximum), RECT1 is turned on and the current flows from anode to cathode, otherwise RECT2 is turned on and the current flows from cathode to anode.

Functions and Features

The VB-40170CHM3/I is designed with excellent features and outstanding performances such as:

• High power rating. It can manage up to 0.8A on-state current, barely affected by PVI drop.
• Excellent EMI damping.
• Very low power consumption.
• High reliability.
• Low cost.
• High voltage operation.
• Integrated single-channel forward rectification with schottky diode
• Improved ESD protection
• Improved transient response.
• High diode forward voltage.
• Low reverse leakage current.
• Low voltage drop.

Working Principle of VB-40170CHM3/I

When a load is connected between the anode and cathode, the VB-40170CHM3/I detects the voltage difference between the two electrical terminals. When the difference of the voltage is higher than 40V, the N-channel MOSFET is prompted and turned on which triggers the flow of current from anode to cathode. When the voltage drops below 40V, the P-channel MOSFET is prompted and turned on which causes the opposite reaction, thus completing the cycle and advancing the bidirectional flow via the same internal circuit.The IC offers a protection feature during electrical transients by virtue of a prominent feature known as “Diode Bypass”. In this case, the Schottky diode bypasses the parallel configuration of the MOSFETs, thus preventing excessive inrush current and voltage transients caused by device switching.The VB-40170CHM3/I schematic diagram can be illustrated as follows:

Application Field of VB-40170CHM3/I

The VB-40170CHM3/I can be used in a number of applications. It is most often used as a constant current source, where its wide load voltage range and low power consumption make it an ideal for applications like buck converters, high-efficiency LED current drivers, switched-mode power supplies, power factor correction circuits and other DC/DC converters where low power dissipation is required. Another application field is EMI/noise damping, thanks to its integrated diode-capacitor combination, which limits the maximum switch current, diminishing the undesired electromagnetic emission generated by the circuit. Finally, the VB-40170CHM3/I is becoming very popular in the automotive industry for its low power requirements and the high reliability of its components. It is used in an array of automotive modules, such as headlamps and windscreen heating.

Conclusion

The VB-40170CHM3/I is a rectifier array IC that incorporates a N-type MOSFET, a P-type MOSFET and a Schottky diode allowing bidirectional currents to flow. It offers excellent features such as high power rating, low power consumption and improved ESD protection.It is suitable for many applications such as constant current source, EMI/noise damping and automotive fields. It’s low cost, high reliability and improved transient response make it a popular IC in the market. Overall, it is worth considering the VB-40170CHM3/I as an ideal solution when you are looking for a rectifier array IC with outstanding features and performances.

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