- Power Management

August 29 - September 2, 2016                                    Deadline for registration: July 13, 2016

registration

MONDAY, August 29

8:30-12:00 am
& 1:30-3:00 pm
DC-DC Converters, Topologies & Control Techniques Richard Redl
3:30-5:00 pm Converter Modeling and Feedback Loop Design Richard Redl

TUESDAY, August 30

8:30-10:00 am Control Techniques and their Integrated Circuit Implementation
for Switched-Mode Converters in Portable Applications
Eduard Alarcon
10:30-12:00 am Adaptive Power Management Techniques for Portable Applications Eduard Alarcon
1:30-5:00 pm Battery Charging Techniques & Circuits for Notebook Computers
& Cellular Phones
Thomas Szepesi

WEDNESDAY, August 31

8:30-10:00 am Ultra-Low-Power Conversion, Harvesting Eduard Alarcon
10:30-12:00 am Fundamentals of Linear Regulators Pavan Hanumolu
1:30-3:00 pm LED Driver Design Pavan Hanumolu
3:30-5:00 pm Bandgap Voltage References Willy Sansen

THURSDAY, September 1

8:30-12:00 am DC-DC: From Discrete Towards Fully CMOS Integrated Michiel Steyaert
1:30-3:00 pm Digitally Controlled DC-DC Converters Pavan Hanumolu
3:30-5:00 pm Time-Based Control of DC-DC Converters Pavan Hanumolu

FRIDAY, September 2

8:30-10:00 am Design of the LDO’s with Instant Load Regulation and
Unconditional Stability
Vadim Ivanov
10:30-12:00 am Circuit Techniques for Integrated Switching Regulators Vadim Ivanov
1:30-3:00 pm Nanopower Design Techniques and Efficient Energy Harvesting Vadim Ivanov
registration

Abstracts

POWER MANAGEMENT
August 29 – September 2
EPFL Premises, Lausanne, Switzerland

DC-DC Converters, Topologies & Control Techniques
Richard Redl, Consultant

Basic nonisolated dc/dc converter topologies, waveforms, and operating modes. Derivative nonisolated converters (two-switch buck-boost, SEPIC, Cuk, coupled-inductor buck). Isolated and multi-output converters. Synchronous rectification. Control techniques: single-loop (constant- frequency and variable-frequency voltage-mode control, voltage regulation without error amplifier), multiple-loop [constant-frequency and variable frequency current-mode control, feedforward control (input-voltage feedforward for line-transient rejection and for frequency stabilization, load-current feedforward), Vsquare control]. Control for improving efficiency at light load. Overload protection techniques.

Converter Modeling and Feedback Loop Design
Richard Redl, Consultant

Averaged small-signal and large-signal models (state-space averaging, direct circuit averaging, method of injected/absorbed currents). Transfer-function block models. Control-to-output and input-to-output transfer functions of voltage-mode-controlled and current-mode-controlled converters. The right-half-plane (RHP) zero. Fundamentals of stability analysis. Feedback loop design for phase/gain margin using the K factor. Practical design examples.

Control Techniques and their Integrated Circuit Implementation for Switched-Mode Converters in Portable Application
Eduard Alarcon, UPC

Review of control requirements / Voltage-mode and current-mode circuit techniques for analog controllers / IC architecture and block design details of analog controller for sliding-mode control, one-cycle control and neurofuzzy control/ Integration of PFM or pulse-skipping control for light-load efficiency improvements/ Description of several practical implementations of analog IC controllers / Digital versus analog control of switching power converters / IC architecture and block design details of digital PWM controller / design of A-D converters / Area and power efficient implementation of digital pulse width modulators (DPWM): hybrid and segmented architectures / Quantization and limit-cycle phenomena in digitally controlled switchers.

Adaptive Power Management Techniques for Portable Applications
Eduard Alarcon, UPC

Adaptive power supplies for RF power amplifiers/ Slow envelope tracking / Fast Envelope Elimination and Restoration (EER) technique / Specifications for EDGE, IS95 and 3GPP-WCDMA modulations / Adaptive voltage and threshold scaling for low-power microprocessor and DSP supply/ Description of several practical implementations of adaptive power management.

Battery Charging Techniques and Circuits
for Notebook Computers and Cellular Phones
Thomas Szepesi, PMChip

NiCad, NiMH, LiIOn, Li-Metal and Li-Polimer batteries and their properties. Charging and charge termination techniques for the different battery chemistries. Off-line, DC/DC and linear battery charger circuits.

Ultra-Low-Power Conversion, Harvesting
Eduard Alarcon, UPC

Abstract to come.

Fundamentals of Linear Regulators
Pavan Hanumolu, University of Illinois

Abstract to come.

LED Drivers Design
Pavan Hanumolu, University of Illinois

LED-based lighting is emerging as a preferred choice for both home/commercial lighting and in portable applications such as camera flash, display backlights in mobile phones, tablets, laptops. This tutorial focuses on design techniques for LED drivers geared specifically to battery-driven portable applications. Efficient DC-DC switching converter architectures to implement such LED drivers along with design examples will be presented.

Bandgap Voltage References
Willy Sansen, KU Leuven

Abstract to come.

DC-DC: From Discrete towards Fully CMOS Integrated
Michiel Steyaert, KU Leuven

Trends and techniques towards fully integrated CMOS DC-DC converters is studied. Both inductive and capacitive DC-DC converters are analyzed. The different required on chip components such as inductors are discussed. Different control loop techniques are presented in order to achieve high integrated density and meanwhile achieving low ripple requirements. Many designed cases, both boost and buck are analyzed and compared with classical LDO regulators.

Digitally Controlled DC-DC Converters
Pavan Hanumolu, University of Illinois

Digital control techniques offer flexibility, reduced sensitivity to component variations, and reconfigurability of DC-DC converters compared to their analog counterparts. The circuit- and system-level tradeoffs involved in the design of digitally-controlled switching converters will be discussed. Circuit techniques to implement analog-to-digital converters and digital PWM controllers will be presented.

Time-based Control of DC-DC Converters
Pavan Hanumolu, University of Illinois

Abstract to come.

Design of the LDO’s with Instant Load Regulation and Unconditional Stability
Vadim Ivanov, Texas Instruments

Discussed is a new class of LDO’s: any load stable, with instant transient response, large power supply rejection and low noise. Examples include the embedded in SoC LDOs for the SRAM unit (5 ns reaction time on the load steps), LDO for radio transmitter (shaping the required noise vs. frequency curve) and LDO for memory retention in the shutdown state (300 nA quiescent current). These LDOs can operate with or without off-chip load capacitors; they are robust to the process and temperature variations and portable to any CMOS process.

Circuit Techniques for Integrated Switching Regulators
Vadim Ivanov, Texas Instruments

Power switches: static and dynamic power loss, switch sizing, wire bonds and their inductance, parasitic vertical PNP and lateral NPN structures, substrate noise, signal grounding and isolation of the control circuitry. Switch Control: Low and high-side gate drivers, use of the bootstrap capacitors with charge regeneration, transfer of the control signal to the high-side. Low and high-side synchronous rectifiers: comparator design, minimization of delays, elimination of shoot-through currents. Feedback and frequency compensation: continuous and discontinuous operation, current and voltage mode; inductor current sensing with and without external elements; oscillator and PWM circuits; error amplifier.

Nanopower Design Techniques and Efficient Energy Harvesting
Vadim Ivanov, Texas Instruments

This lecture covers power management of systems having long periods of idle time with very low power consumption alternated by active high power states, like systems with power harvesting. Circuit techniques used in ultra low power analog circuits applicable in power harvesting systems will be presented, including nanoampere biasing, voltage references with sub-volt supply, active rectifiers, comparators, oscillators and error amplifiers. Also covered design techniques and circuits of DC/DC converters, providing high efficiency at a wide range of loads down to the microampere range and battery chargers with maximum power point tracking and battery protection.

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