R1260 Series 60V Buck DC/DC Controller with Synchronous Rectification and VFM/PWM Control,Suitable for Use in Automotive and Industrial Applications

PublishTime： 2023-07-18 Article Source：NISSHINBO

R1260 series, a high-voltage Buck DC/DC Controller optimized for use in automotive and industrial applications.

The R1260 series is a buck DC/DC controller which has a wide input voltage range of 5.0 V to 60 V and maximum rating of 80 V. The output voltage is externally configurable in the range of 1.0 V to 16.0 V.

Today, a variety of batteries are used in automotive applications. In Europe, the number of automobiles adopting a 48 V mild hybrid system is increasing, while 24 V batteries are widely used in commercial cars. In addition, Li-ion-battery-powered micro mobilities, including electric bicycles and kick scooters, are widely spreading.

In industrial applications, on the other hand, 48 V power distribution is becoming the mainstream of remarkably growing 5G base stations and data centers, as well as conventional FA equipment such as programmable logic controllers (PLCs) and Power over Ethernet (PoE) systems. All of them need to step down a 48 V to another voltage.

The R1260 series, thanks to its high operating voltage up to 60 V, can directly step down such a high voltage to a source voltage for devices used in automotive and industrial applications such as an MCU, an SoC and sensors.

The R1260 series is a controller-type IC which requires an external FET, so you can choose an optimal FET according to the usage. Besides, to convert a voltage efficiently even at light load, the IC has a function to switch VFM (Variable Frequency Modulation) and PWM (Pulse Width Modulation) modes according to load current. This enables the IC and systems to achieve high-efficiency operation at both heavy and light load conditions.

The over current protection is user-selectable from the following two types: the hiccup type which is automatically released after removal of the abnormality, and the latch type which requires some manipulations such as re-inputting a power. Moreover, for use with safety and security, the IC includes various functional mechanisms such as under- and over-voltage protections, under-voltage lockout and thermal shutdown functions.

Also, the spread spectrum clock generator (SSCG) which suppresses the peak of radiation noise will help reduce the risk of failing to pass EMI testing and the number of components for EMI countermeasures. All of the features make the R1260 series an easy-to-use DC/DC controller.

The R1260 will be manufactured in our Yashiro Plant (Kato City, Hyogo Prefecture). The new IC adopts lead-pin-type, easy-to-mount HSOP-18 package. In addition, it is going to be an applicable product of our Product Longevity Program, which maintains the product supply for at least 10 years. You can use the R1260 series for a long time without EOL concerns.

R1260 Series (HSOP-18)

Key Features of R1260 Series

1. Direct Step-down from Input Voltage Up to 60 V, Maximum Rating of 80 V

The R1260 series is a DC/DC controller capable of directly receiving a high voltage thanks to the wide input voltage range from 5.0 V to 60 V and maximum rating of 80 V. The output voltage is externally settable from 1.0 V to 16.0 V. Using the R1260 series makes it possible to directly convert a high voltage into a source voltage for devices such as an MCU, SoC, and sensors. Compared to the conventional 2-step buck method, the total efficiency of a step-down circuit using the R1260 is superior thanks to the ability to directly step down a voltage up to 60 V.

2. High-efficiency Operation at Heavy and Light Load by Automatically Switching PWM/VFM Modes

To convert a voltage efficiently even at light load, the R1260 series has a function to switch VFM (Variable Frequency Modulation) and PWM (Pulse Width Modulation) modes according to the load current. This enables the IC and systems to achieve high-efficiency operation at both heavy and light load conditions.

Efficiently (VOUT=5.0V, fosc=250kHz)

3. Spread Spectrum Clock Generator (Diffusion Rate: -7.2%) for Reducing EMI Noise

As today’s electronic devices have been advancing functionality, various communication systems have been loaded on a car. These systems act as not only receivers but also noise generators. Therefore, it is necessary for electronic components to reduce peak noise generated by their own operation. The R1260 series contributes to taking countermeasures against EMI noise with its spread spectrum clock generator (SSCG) function to suppress peak noise.

Quality Grades of R1260 Series

About Nisshinbo

New Japan Radio Co., Ltd. and Ricoh Electronic Devices Co., Ltd. of the Nisshinbo Group were integrated and started operation as Nisshinbo Micro Devices Inc. in January 2022. Nisshinbo integrated the strengths of both companies and refine "Connect Everything" technology, and, therefore, strive for further growth and development as an "Analog Solution Provider toward the realization of an ultra-smart society.

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