1. A Power Management Company Innovative PFC Control Solutions
Intersil
A Power Management Company
Innovative PFC Control Solutions
Alan Yu
Staff Applications Engineer
October 24, 2014
Power Technology Innovation Application Forum
Shenzhen, China

2. Agenda Intersil Overview
Intersil’s Innovative Power Factor Correction (PFC) Controllers
Advantages of PFC Control Solutions
Intersil Support, Design Tools and Evaluation Boards 2

3. Intersil’s Core Capabilities and Technologies
Intelligent Power Management
Multi-phase Modulation
Radiation Hardened & High Reliability
Process and Packaging
Precision Analog
High Performance Analog
Light and motion sensing
Laser drivers
Video
Power Conversion
Vcore power management Buck Boost/Regulation
Digital Power
The renewed focus of the company was based on where we have the strongest, and most unique core capabilities. Intersil is first and foremost a power management company. We have technology that rivals the best in the industry in power management and believe we offer customers the capabilities required to deliver on their most challenging power system issues. At the heart of this expertise is multi-phase modulation, this and other modulation techniques honed by Intersil enable significant advantages over competing solutions.
Precision analog capability augments our power management solutions with related and complementary technologies that further simplify and improve customer board design. These specialty products include presence detection sensors, video technology and traditional analog building blocks.
Intersil also has a heritage of providing IC solutions for the most rigorous environments, including military and aerospace. We intend to leverage our in house ELDRS testing facility, long shipping history and know-how to maintain a leadership position and deliver additional content to our customers. In automotive, we’ve also been able to deliver highly reliable solutions for infotainment and LCD displays as well as power management solutions for emerging HEV/EV battery management applications.
And the fourth element of Intersil’s core capability is innovative process and packaging technology enabling significant performance advantages and provide additional supply assurance for many products.
Innovative Process
Proprietary process technology
Multi-source, high reliability
Best-in Class Rad Hard
In-house ELDRS radiation testing facility
MIL-PRF compliant and 100% burned in 3

4. Four Product Groups Addressing Key Markets
Computing PC Consumer Handheld Consumer Display Mobile Power
Wired/Wireless Infrastructure Servers and Storage Industrial Industrial & Infrastructure
Intersil is organized into four product groups, one focused on mobile power, another on industrial and infrastructure power, a third focused on high reliability products for automotive, rad-hard and aerospace, and our specialty products group focused on high performance analog solutions.
These product groups supply a variety of key end markets.
Automotive RadHard Aerospace High Precision Analog Precision Products
Security Motion and Light Sensing Specialty Analog Specialty Products 4

5. PFC Controller Family: ISL6730A/B/C/D & ISL6731A/B
Flexible packaging
- 62K & 124K FSW option
- 10 pin MSOP or 14 pin SOIC package
Robust Design
- CCM mode operation
Extensive Protection
- Input rail brownout protection
Adjustable OVP
Better control over board response
- Dual protection from over current
Cycle by Cycle Current Limit
Input power limit
Patented Negative Capacitance Technology
- Better THD performance
- Better PF performance
- Smaller EMI filter components
- Support high freq operation
Switching Freq Jittering
- 75%-100% by VIN pin voltage
- Better conduction EMI Performance
Intelligent Burst mode
- User adjustable pulse skipping level PN
Fosc
Skip Mode
Package
Status
ISL6730A
124kHz
Yes-Fixed
MSOP-10
Released
ISL6730B
62kHz
ISL6730C No
ISL6730D
ISL6731A
Yes-Programmable
SOIC-14
ISL6731B 5

6. Without Requiring a MCU/DSP (and Firmware)
Key Feature #1: Negative Capacitance Provides Low THD, High PF and Smaller Size Solution
Superior Performance!
and Low Cost!
Over load and line conditions:
Small phase shift
High PF
Low THD
Preferred application choice with very tight THD/PF spec
Intersil’s PFC Controller Performance Outperforms the Digital Controlled PFC
Without Requiring a MCU/DSP (and Firmware)
VIN
Iin
PH Shift 6

7. Negative Capacitance Enables Smaller Size (Cont’d)
Allows Smaller X-Cap size while meeting or improving THD/PF performance
Allows shift of EMI filter after bridge rectifier
Eliminating the need for safety-grade parts  Reducing EMI filter cost and size
Reduced system cost & size while meeting or improving THD and PF performance
STANDARD EMI Filter
EMI Filter Moves After Rectifier
C1 +C2+C3 - CEQ
= 1.41uF uF
= 0.32uF
C1 +C2+C3
= 1.04uF 7
Conventional Control Negative Cap Control

8. Problem with a Conventional PFC Solution
Bulky EMI Filter
PFC EVAL BOARD: P = 300W,
ONE CYCLE CONTROL
iin + va 
HEATSINK
PFC
ic1 L1
ic2 ia
ic3 L2 L3
ic= ic1 + ic2 + ic3
C1,2,3 prefer bigger size.
But limited by power factor requirement.
L3 is sized to meet the differential mode noise attenuation.
EMI
C1, C2 Noise Suppression
L3, Differential Noise Suppression
L2, Common Mode Noise Suppression
To meet the EMC standard, such as the IEC62000.
EMI filter is used to filter out both differential mode and common mode noise as well.
To filter out differential mode noise generated by the active PFC circuit, 1 stage or 2 stage LC filter is used. As the total input capacitor
Input voltage and current phasor diagram. 8

9. Intersil Solution: Create an Equivalent Negative Capacitor to Cancel Effect of the Input Capacitors
CONVENTIONAL CURRENT CONTROL
VLINE
IL + ICIN Im
iin = ip + ic iC
Current Control with CEQ
VLINE
IL + ICIN ia
iin q
Assuming the PFC is doing an ideal job. The PFC is equivalent to a resistor. The current, ia is in phase with the input voltage.
The reactive current ic, introduces an phase angle.
This control technique is to introduce a phase lagging current icn, at the PFC stage. The amplitude of the icn is independent of load condition and is in proportion to the input line voltage.
The PFC stage is equivalent to a resistor and a negative capacitor. This icn can cancel the input capacitor current, ic. Thus the phase angel between the input current and the input voltage is reduced. Thus the displacement power factor is improved.
This technique dramatically reduce the limit on the input capacitors. As the input capacitor size increases slightly, the DM mode filter inductor can be reduced significantly. Thus the EMI filter size is reduced without harming the input power factor.
icn va Re ip
ip = ia + icn 9

10. Key Feature #2: ISL6731A/B’s Auto Skipping Provides High Efficiency @ Light Load10
Programmable Skip Threshold (ISL6731A/B)

11. Key Feature #3: Dedicate OVP Pin Provides Flexible, High Reliability Required for Industrial Applications
Dedicate OVP pin (ISL6731A/B) 11

12. Key Feature #4: Frequency Modulation Provides Low EMI
Frequency Modulation: reduces EMI filter size 12

13. Key Feature #5: Open Loop Protection Increases Reliability
When the FB pin is below 10%, the device is put into shutdown mode. There is an internal pull-down current source for open loop protection to avoid run-away. 13

14. ISL673x: True Competitive Board Evaluation @ 300W
Comp. A
Comp. B
Comp. C
Intersil & Competition tested under same circuit/condition
Intersil stands out
Comp. A
The legend with B suffix are for ISL6730B, and D for ISL6730D.
We can see the light load eff can be improved by skip mode (-B curves)
Comp. B
Comp. C
Comp. A
Comp. B
Comp. C 14

15. ISL673x : Industry’s Best Performance @ 750W
Major Customer Spec 15

16. Intersil PFC (AC/DC) + ZVS (DC/DC) at 750W
ISL6731 PFC
Major Customer Spec
DC/DC
ISL6754 AFB 16

17. Intersil Provides Full Evaluation Board Support
Specs:
VIN=90V - 265VAC 
VO=390VDC
124×80×37 mm3
300W ISL6731AEVAL1Z (124kHz)
ISL6731BEVAL1Z (64kHz)
300W 64kHz ISL6730BEVAL1Z
ISL6730DEVAL1Z
ISL6730B
ISL6730D
ISL6731A
ISL6731B
ISL6730A
ISL6730C
Specs:
• VIN=85V - 265VAC
• VO=390VDC
•Fosc=124kHz
• 124x80x38 mm3
85W ISL6730AEVAL1Z
ISL6730CEVAL1Z
Specs:
• VIN=90V - 265VAC
• VO=390VDC
• 121x96x38 mm3
750W ISL6731AEVAL2Z (124kHz)
ISL6731BEVAL2Z (64kHz) 17

18. Intersil Delivers Innovative PFC Control Solutions
Best-in-Class PFC Controllers Outperform Digital Control
Easy-to-Use PFC Solution with No Software Programming Required
Highly Integrated with Full Feature-Set Provides a Low Cost Solution to Challenging Power System Designs
Excellent Engineering Support with Design Tools and Evaluation Boards 18