BD71847AMWV - Documentation

BD71847AMWV integrates all power rails required by i.MX 8M Mini processors and system peripherals. In addition to integrate a sequencer compatible with power modes supported by i.MX 8M Mini processors, making it possible to significantly reduce the development time, decrease size, and simplify application design.

The power supply circuit of the BD71847AMWV, designed specifically for the power supply system of the i.MX 8M Mini processor family, integrates an 6 buck converters, 6 LDOs, and control logic that allows it to supply power not only to the processor, but the required DDR memory as well – all from a single chip. A 1.8V/3.3V power switch for SDXC cards is also built in, along with a 32.768kHz crystal oscillator driver and multiple protection circuits such as output short-circuit, output over-voltage/current, and thermal shutdown.
Buck conversion efficiency from 83 to 95% is achieved for 0.7V to 3.3V output, and the wide input voltage range from 2.7V to 5.5V supports a variety of power sources, from batteries to USB, making them ideal for i.MX 8M Mini applications.
Furthermore, when single-sided mounting and Type-3 PCB is assumed, 42 fewer parts are needed compared with discrete solutions, reducing PCB area by up to 42%.

* This is a standard-grade product.
For Automotive usage, please contact Sales.

White Paper

ISO 26262: Functional Safety Standard for Modern Road Vehicles
In this paper, as interest in functional safety and ISO 26262 grows and initiatives and responses are needed, we will introduce these concepts from a semiconductor manufacturer’s perspective, including how they affect the automotive sector.
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Application Note

Platform Design Guide
“BD71847AMWV Platform Design Guide” provides the guideline for designing PCB including recommendation for the PCB layer stack up, the components placement and the PCB routings. To reduce the risk that comes from PCB layout or parts placement, the guideline is strongly recommended to be applied to the PCB design.
BD71847AMWV Frequently Asked Questions
This document question-and-answer format for BD71847AMWV which is a Power Management IC for NXP i.MX 8M Mini System-on-Chip (SoC) platform.
BD71847AMWV 1x22μF Buck Output Capacitor
This document summarizes the BD71847AMWV electrical performance while reducing the BUCK output capacitors from 2pcs x 22μF to 1pcs.
Errata information on product "BD71847MWV"
The problem described on errata has been solved with new product BD71847AMWV. The BD71847MWV will be replaced by BD71847AMWV. BD71847AMWV has same foot print and functionality with previous BD71847MWV.
Importance of Probe Calibration When Measuring Power: Deskew
Even when devices used for measurement are calibrated regularly, they will give incorrect results if calibration is not perfo rmed for the measurement environment. This application note explains the importance of probe calibration in power measurement environments.
Thermal Resistance
The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.
Impedance Characteristics of Bypass Capacitor
This application note focuses on the impedance characteristics of capacitors, and explains cautions for selecting bypass capacitors.
Package Ordering Unit
For ICs