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Swayam Central

Power Management Integrated Circuits

By Prof. Qadeer Ahmad Khan   |   IIT Madras
This course is intended to develop understanding of why power management circuits are needed in a VLSI system, what are the different components of a power management system with focus on voltage regulators. By the end of this course, students should be able to understand the concept behind power management circuits and design a linear (LDO) and switching regulator (dc-dc converter) for a given specifications using behavioral and circuit level simulators. 
INTENDED AUDIENCE : Final year undergraduate, graduate, PhD students in Electrical/Electronic Engineering. Faculty teaching or intended to teach course on analog IC design and/or power management IC Industry professionals working in the area of analog IC design, VLSI, power management ICs.
PREREQUISITES :   Analog Circuits or equivalent or industry experience in analog circuit design
INDUSTRY SUPPORT :   Qualcomm, Texas Instruments, Intel, Sankalp Semiconductor, NXP Semiconductors, ST Microelectronics, Samsung, Microchip, ON semiconductor, Infineon, Renesas, Analog Devices

Learners enrolled: 374

SUMMARY

Course Status : Upcoming
Course Type : Elective
Duration : 12 weeks
Start Date : 27 Jan 2020
End Date : 17 Apr 2020
Exam Date : 26 Apr 2020
Enrollment Ends : 03 Feb 2020
Category :
  • Electrical, Electronics and Communications Engineering
  • Level : Undergraduate/Postgraduate
    This is an AICTE approved FDP course

    COURSE LAYOUT

    Week 1 : Introduction to power management, application, need, discrete vs. integrated PMIC, dc-dc converter, types of dc-dc converter, linear vs switching regulator, Linear vs switching regulator, selecting between linear and switching regulators, power management of a smartphone, performance parameters-efficiency, accuracy, line and load regulation, line transient, load transient, PSRR, remote vs. local feedback, point-of-load, kelvin sensing, droop compensation.
    Week 2 : Bandgap voltage reference, PTAT and CTAT voltage reference, designing a bandgap reference using PTAT and CTAT, Brokaw bandgap reference, Sub-1V bandgap reference, introduction of linear regulator, pass elements, review of feedback system and bode plot, loop gain AC analysis, stability criterion and phase margin.
    Week 3 : Review of 2nd order system, relationship between damping factor and phase margin, stabilizing a linear regulator - compensation techniques, dominant pole compensation, miller compensation, R.H.P. zero in miller compensation, determining poles and zeroes after miller compensation, pole splitting, reducing the effect of R.H.P.
    Week 4 : Load regulation and output impedance of LDO), line regulation and power supply rejection of LDO, NMOS LDO, sources of error in regulator, static offset correction, Dynamic offset cancellation, digital LDO, hybrid LDO, current limit and short circuit protection.
    Week 5 : Basic concept of switching regulator, inductor ripple current, volt-second balance, power stage and calculating duty cycle resistive losses, transformer model of a buck converter, efficiency of switching regulator, efficiency with only conduction losses, synchronous and non-synchronous converter, losses in switching dc-dc converter- conduction loss, gate switching loss, dead time switching loss, hard switching loss, magnetic loss, power loss vs. load current.
    Week 6 : Output voltage ripple in dc-dc converter, ripple voltage vs. duty cycle, ripple voltage vs input supply voltage, choosing inductor and capacitor, continuous and dis-continuous conduction modes, pulse width modulation - trailing, leading and dual edge modulation, voltage mode control, small signal modelling of dc-dc converter, loop gain analysis using continuous time model.
    Week 7 : Compensating a voltage mode buck converter, type-I(integral) compensation, designing type-II (PI), type-III (PID) compensator, finding compensation parameters, designing type-III compensator using op-amp-RC and gm-C, design examples.
    Week 8 : Current mode control, types of current mode control – peak, valley and average current control, sub-harmonic oscillations, slope compensation, small signal model and compensation of current mode controlled buck converter.
    Week 9 : Hysteretic control, stability issues with hysteretic control, voltage vs. current mode hysteretic control, effect of loop delay in hysteretic control, fixed frequency hysteretic control, constant-ON time control, adaptive ON time control, basic concept of boost converter, switched capacitor dc-dc converters.
    Week 10 : Selecting buck topology, switching frequency and external components, sizing power FETs, segmented power FET, designing gate driver, PWM modulator, error amplifier, oscillator, ramp generator, ramp generator with feed-forward compensation, feedback resistors, current sensing, PFM/PSM mode for light load, effect of parasitic on reliability and performance, current limit and short circuit protection, soft start control.
    Week 11 : Choosing type of regulator in multi-chip system, selecting process node for PMIC, chip level layout and placement guidelines, board level layout guidelines, EMI considerations, system level techniques for efficiency improvement.
    Week 12 : Introduction to advanced topics in PMIC:Digitally controlled dc-dc converters, time-based control for voltage regulators, adaptive compensation, dynamic voltage scaling (DVS), Single-Inductor Multiple-Outputs (SIMO) Converters, dc-dc converters for LED lighting, Li-ion battery charger.

    BOOKS AND REFERENCES

    1. Switch-Mode Power Supplies: SPICE Simulations and Practical Designs by Christophe P. Basso, McGraw-Hill Professional, 2008.
    2. Fundamentals of Power Electronics, 2nd edition by Robert W. Erickson, Dragan Maksimovic, Springer, 2001.
    3. Power Management Techniques for Integrated Circuit Design By Ke-Horng Chen, Wiley-Blackwell, 2016.
    4. Design of Analog CMOS Integrated Circuits by Behzad Razavi, McGraw-Hill, 2017.

    INSTRUCTOR BIO

    Prof. Qadeer Ahmad Khan

    IIT Madras
    Dr. Qadeer Khan is an assistant professor in the Integrated Circuits and System group of the department of Electrical Engineering, Indian Institute of Technology Madras. He received the Bachelor's degree in electronics and communication engineering from Jamia Millia Islamia University, New Delhi, India, in 1999 and the Ph.D. degree in electrical and computer engineering from Oregon State University, USA in 2012. His Ph.D. work was focused on developing novel control techniques for high performance switching dc-dc converters. From 2012 to 2015, he worked as a Staff Engineer, Power Management Systems with Qualcomm, San Diego and from 2015 to 2016 with Qualcomm, Bangalore where he was involved in defining system and architecture of various power management modules for snapdragon chipsets catering to different smartphone markets. From 1999 to 2005, he worked with Motorola and Freescale Semiconductor, India, where his main responsibilities were designing mixed-signal circuits for baseband and network processors and full-chip integrated solutions for high-voltage motor drives. Dr. Qadeer Khan holds 18 U.S. patents and authored/co-authored over 20 IEEE publications in the area of analog, mixed-signal and power management ICs. He serves as reviewer of the IEEE Journal of Solid-State Circuits, IEEE Transactions on Very Large Scale Integration Systems, IEEE Transaction on Power Electronics and IEEE Power Electronics Letters.His research interests involve high-performance linear regulators, LDOs, switching dc-dc converters and power management ICs for portable electronics and energy harvesting

    COURSE CERTIFICATE

    • The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
    • The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
    Date and Time of Exams: 26th April 2020, Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
    • Registration url: Announcements will be made when the registration form is open for registrations.
    • The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
    • Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

    CRITERIA TO GET A CERTIFICATE:
    • Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
    • Exam score = 75% of the proctored certification exam score out of 100
    • Final score = Average assignment score + Exam score

    YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75.
    • If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.
    • Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Madras. It will be e-verifiable at nptel.ac.in/noc.
    • Only the e-certificate will be made available. Hard copies will not be dispatched.

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