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Power Components for Battery Applications

Presented by: Travis WilliamsSenior Manager, Product Management and Marketing

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Agenda

1. Battery Powered Systems

– Applications and trends

2. Regulating Batteries

– Battery specific challenges

– Universal challenges

3. Choosing a DC-DC Regulator

– What to look for

4. Vicor Solutions and Benefits

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Battery Powered Systems

› Automotive Hybrid Battery Voltages and Technologies

– Start/stop enabled mild/micro hybrids

– 48V rails the future of automotive electronics?

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Battery Powered Automotive Accessories

› Automotive Hybrid Battery Voltages and Technologies

– Increased power demands from additional electronics

› Video surveillance, portable wireless, infotainment, active chassis systems

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Grid Independent Homes and Distributed Generation

› Alternative ‘Green’ Power Generation

– Solar and wind powered homes

– Distributed generation

Source: www.microgrids.et.aau.dk

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Industrial & Portable Equipment Battery Back-Up

› Solar Powered Road Signs

› Portable Medical Equipment

› Industrial Battery Chargers

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Regulating Battery Supplies – Power Out

› Wide Operating Voltage Ranges

– Example: traditional 12V lead acid battery

› Typically applications 8V<= Vbat <= 16.5V

http://www.scubaengineer.com/documents/lead_acid_battery_charging_graphs.pdf

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Charging Batteries – Power In

› Constant-Current / Constant-Voltage Curve

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Battery Specific Challenges

› Load Regulation and Charging

– Switching between Voltage Priority & Current Priority

– Many systems use dedicated battery charging components and DC-DC regulators

› Harsh Environments

– Indoors, outdoors, wide temperature ranges -40C to +125C

› Thermal Management

– High ambient temps, little to no cooling mechanisms

– No room for a heat sink & no active cooling

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Regulating Automotive Batteries – Special Case

› Automotive Alternators Bring an Extra Challenge

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Universal Challenges

Make it Smaller, Lighter, and with More Power!

http://www.edn.com/electronics-blogs/scope-guru-on-signal-integrity/4403881/Automotive-electronics-systems--trends-and-impact-for-test-and-measurement-companies-

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What to Look for in a Solution

› Wide Input/Output Operating Range

– One solution that supports 12V, 24V, 36V, 48V batteries

– Maintain regulation over entire input range

60V48V36V24V12V

12V

24V

36V Li Ion

48V Li Ion

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What to Look for in a Solution

› Support for Both Voltage Priority & Current Priority Operation

– Charging mode = constant-current priority

– Regulation mode = DC-DC Buck-Boost voltage priority

– Dual mode solution to replace a separate DC-DC regulator and battery charger

CC Mode CV ModeDual Mode

DC-DC

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What to Look for in a Solution

› High Efficiency

– Higher efficiency less heat = more power/ PCB area

– Uniform efficiency performance over a wide VIN range

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What to Look for in a Solution

› Small Size, Lightweight, Power Dense & Modular

– High switching frequency smaller power components

– Lightweight solutions

– System-in-Package solution facilitate a modular design approach

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What to Look for in a Solution

› Scalability

– Modular solutions which are easily paralleled

– Automatic current sharing

DC-DC

DC-DC

DC-DCLoad

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Vicor’s Solution and Benefits

› PI374x Family of Buck-Boost Regulators

– PI3740, PI3741, PI3749

› Lower Cost of Ownership

– System-in-package modular design

› Reuse and scalability

– Thermal and power design margin

– Simplified BOM

– Faster design time

– Pre-compensated and optimized

› First pass design success!

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Products and Tools

› Vicor provides AC-DC, High Voltage DC-DC, and DC to PoL Solutions

–Select BCM and VTMs support bi-directional operation

–http://www.vicorpower.com/powerbench

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Thank you

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IEEE PDH Information

› Webinar title: Power Components for Battery Applications

› Code: 2017IEEE04S14

› Link for form: https://fs25.formsite.com/ieeevcep/form112/index.html