DOWNLOAD Harman Kardon MAS 101-102-111 Service Manual ↓ Size: 3.02 MB | Pages: 60 in PDF or view online for FREE

 

 

www.irf.com 

© 2007 International Rectifier 

 

September 2007 

 

•  Integrated analog input Class D audio amplifier 

driver in a small 16 pin package 

•  Floating inputs enable easy half bridge 

implementation 

•  Programmable bidirectional over-current 

protection with self-reset function 

•  Programmable preset deadtime for improved 

THD performances 

•  Start and stop click noise reduction 
•  High noise immunity 
•  ±100 V ratings deliver up to 500 W in output 

power 

•  Operates up to 800 kHz 
• RoHS 

compliant 

 
 
 

•  Home theater systems 
•  Mini component stereo systems 
•  Powered speaker systems 
•  General purpose audio power amplifiers 

 

V

OFFSET

 (max) 

± 100 V 

Io+ 1.0 

A 

Gate driver 

Io - 

1.2 A 

Selectable Deadtime 

25/40/65/105 ns 

OC protection delay (max) 

500 ns 

DC offset 

<20 mV 

PWM frequency 

~800 kHz 

Error amplifier open loop gain 

>60 dB 

THD+N* (1kHz, 50W, 4Ω) 0.01 

% 

Residual Noise* 
(AES-17 Filter) 

200 µVrms 

    * measured with recommended circuit 

 

       

 

SOIC16N                  PDIP16

 

 

 

 

IRS2092

12V

VAA

GND

IN-

OCSET

COM

COMP

VSS

LO

VCC

VREF

HO

VS

CSD

CSH

VB

INPUT

-B

Vcc

+B

Speaker

DT

2

16

1

4

3

5

6

7

8

15

14

13

12

11

10

9

 

19

20

21

© System General Corp.  www.sg.com.tw  •  www.fairchildsemi.com  
Version 1.3.1 (IRO33.0028.B6) 

 

September 24, 2007 

„  Boundary Mode PFC Controller 
„  Low Input Current THD 
„  Controlled On-Time PWM 
„  Zero-Current Detection 
„  Cycle-by-Cycle Current Limiting 
„  Leading-Edge Blanking Instead of RC Filtering 
„  Low Start-up Current (10µA Typical) 
„  Low Operating Current (4.5mA Typical) 
„  Feedback Open-Loop Protection 
„  Programmable Maximum On-Time  (MOT) 
„  Output Over-Voltage Clamping Protection 
„  Clamped Gate Output Voltage 16.5V 

„  Electric Lamp Ballasts 
„  AC-DC Switching Mode Power Converter 
„  Open-Frame Power Supplies and Power Adapters 
„  Flyback Power Converters with ZCS/ZVS 

The SG6961 is an 8-pin boundary mode PFC controller IC 

intended for controlling PFC pre-regulators. The SG6961 

provides a controlled on-time to regulate the output DC 

voltage and achieve natural power factor correction. The 

maximum on-time of the external switch is programmable 

to ensure safe operation during AC brownouts. An 

innovative multi-vector error amplifier is built in to 

provide rapid transient response and precise output 

voltage clamping. A built-in circuit disables the controller 

if the output feedback loop is opened. The start-up current 

is lower than 20µA and the operating current is under 

4.5mA. The supply voltage can be up to 20V, maximizing 

application flexibility.  

 

 

ZCD

MOT

GND

CS

GD

INV

COMP

VCC

SG6961

VAC

Vo

 

22