R-Car S4 Development Board/Spider
This solution provides a complete development environment with hardware and software for automotive gateway applications to support the new E/E architecture.
Overview
Description
The RAA271041 is a controller for a dual regulator system capable of supporting ASIL-D automotive systems which must operate during battery dropout conditions. The Channel 2 boost regulator maintains the voltage rail which supplies the downstream Channel 1 buck regulator, allowing the buck output to maintain regulation during a battery dropout event such as cold cranking.
For Cold Crank applications, the Channel 2 Boost has an adjustable output and is active when the VBAT input voltage falls below a user-programmable threshold. If the VBAT input is above the user-programmed threshold, the boost controller features a Boost Bypass mode in which the boost channel’s high-side MOSFET is held on and the VBAT input voltage is passed directly to the boost output. The boost channel can also be configured as a standalone boost which is always on.
The boost output from Channel 2 supplies the input for Channel 1 buck. The buck output can be configured either as 3.3V or 5V fixed with a direct connection from FB1 to VOUT1, or as an adjustable voltage from 0.8V to 5V using a resistor divider from VOUT1 to FB1 to ground.
The RAA271041 requires a minimum input voltage of 6V for start-up. The Channel 2 Boost has an input range from 2.2V to 42V while the Channel 1 Buck has an input range from 3.5V to 42V.
The RAA271041 buck channel can operate in Energy Conservation Mode (ECM) to provide a low IQ mode by reducing quiescent current draw to 6μA typical when no external load is applied. The buck switching frequency is factory programmed to 400kHz or 2.2MHz. The boost switching frequency is also factory programmed to 400kHz, or can optionally be 2.2MHz if the buck frequency is also 2.2MHz. Optional spread spectrum operation allows for a reduction of EMI and noise levels.
See also the RAA271005. This product works together with the RAA271041 to support RCAR-S4.
Features
- Minimized FET ON and OFF times (25ns and 50ns)
- Optional pseudo-random spread spectrum clocking
- High-efficiency buck exceeding 80% at 10mA
- Buck frequency options 400kHz or 2.2MHz
- Boost frequency options 400kHz or 2.2MHz (2.2MHz requires Buck frequency at 2.2MHz)
- VBATS sense for Boost Enable during Cold Crank
- Boost Bypass mode (for Buck in CCM)
- External synchronization via SYNC pin
- Dual Over-temperature protection monitors
- 6 x 6 mm 36Ld SC-QFN package
- AEC-Q100 grade 1 qualified
- Functional Safety Features
- Built-in Self Test (BIST) at power up
- Recurring Checks: Internal References, PWM clock, System Clock, PGND/AGND connection, Dual Over-Temperature monitor, ECM Exit Delay, VCC supply.
- Independent References and feedback sense paths for Buck and Boost OV/UV detection
- Independent Fault Indicators for Buck and Boost
- Fail-Safe Output, logic high indicates a trusted device state and all safety monitors are active.
Comparison
Applications
Applications
- Vehicle Computers
- Communication Gateway
- Domain Server
- Application Server
Documentation
= Featured Documentation
Log in required to subscribe
|
|
|
|
|---|---|---|
| Type | Title | Date |
| Datasheet - Short-form | PDF 226 KB | |
1 item
|
||
Design & Development
Boards & Kits
R-Car V4H System Evaluation Board Set/White Hawk
The White Hawk is an R-Car V4H-specific evaluation board set that can be used to evaluate systems using the R-Car V4H and to develop operating systems, device drivers,...
Featured Documents:
Vehicle Computer Generation 4
The VC4 is based on a complete Renesas chipset. The centerpiece is the R-Car S4 with 8x Cortex®A55 cores, 1x Cortex® R52 core 2x RH850 G4MH delivering up to 27K DMIPS...
Featured Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| Tube | 2 | Get Samples, |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product
Videos & Training
RAA27100X Power Management IC for R-Car SoCs
Video List
News & Blog Posts
| Blog Post | Jul 26, 2024 | ||
| Blog Post | Nov 28, 2023 | ||
| Blog Post | Jul 3, 2021 |
