SM74104MAX/NOPB Integrated Circuits (ICs)

Logic Voltage - VIL, VIH:	0.8V, 2V
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Rise / Fall Time (Typ):	600ns, 600ns
High Side Voltage - Max (Bootstrap):	118V
Input Type:	Non-Inverting
Current - Peak Output (Source, Sink):	1.6A, 1.6A
Series:	--
Voltage - Supply:	9 V ~ 14 V
Gate Type:	N-Channel MOSFET
Number of Drivers:	2
Channel Type:	Synchronous
Driven Configuration:	Half-Bridge
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The SM74104MAX/NOPB is a chip designed to control the gates of field-effect transistors (FETs) in power management, display and other applications. It is part of a category of chips called “Power Management ICs with Gate Drivers” or “PMICs with Gate Drivers.” This article will discuss the various applications and working principle of the SM74104MAX/NOPB.

Applications

The SM74104MAX/NOPB is a single chip solution for controlling the gates of FETs in power supplies, laptops, and other display, audio/visual and other devices. The chip is designed with an integrated pulse-width modulation (PWM) driver, an auxiliary digital signal processor (DSP) interface, internal latches and digital filters, and a programmable output skew function. The chip also supports both 4-wire and 3-wire communication for programming, monitoring, and controlling. The SM74104MAX/NOPB is designed to control the gates of MOSFETs (metal-oxide-semiconductor field-effect transistors) and IGBTs (insulated-gate bipolar transistors), allowing precise and accurate control of the transistors’ switching speed and voltage. This makes the chip suitable for a variety of applications, including DC-to-DC converter design, power supply design, and motor drive control. The SM74104MAX/NOPB is used in...- Mobile devices- Digital cameras- Mobile phones- TV sets- Car Audio systems- LED lighting - Medical devices- Computing systems

Working Principle

The working principle behind the SM74104MAX/NOPB is the control of the FET gate by an integrated PWM driver. A PWM driver is a digital circuit that switches the gate on or off at predetermined intervals, creating a varying signal with a frequency directly related to the input voltage’s frequency. This signal is then sent to the FET gate to control the switching speed of the FET, allowing for precise control of the device’s output voltage.The SM74104MAX/NOPB features an advanced PWM driver that provides a fast switching frequency with low jitter and excellent noise immunity, as well as a programmable output skew to reduce ringing and minimize switching noise. The chip also features a built-in digital signal processor (DSP) interface and internal latches and digital filters to reduce the overall size and power consumption of the gate drive system. The SM74104MAX/NOPB can be used with both 4-wire and 3-wire communication systems to program, monitor, and control FET gates. The chip supports SPI, I2C, and UART communications, as well as pulse-width modulation (PWM) signals for controlling the gates.

Conclusion

The SM74104MAX/NOPB is a powerful and versatile gate driver chip suitable for a wide range of applications, from mobile devices to LED lighting. The chip has an integrated PWM driver for controlling the gate of FETs, as well as an auxiliary DSP interface, internal latches and digital filters, and a programmable output skew function. The chip supports both 4-wire and 3-wire communication systems, allowing for precise and accurate control of the device’s output voltage.

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