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About Silan

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Contact Us

Discrete Divice

LVMOS

Planar LVMOS Normal Trench LVMOS Split Gate Trench LVMOS Automotive MOSFET

HVMOS

Planar HVMOS Multi-Epi DPMOS Trench DPMOS

IGBT

Planar IGBT Trench IGBT SiC Hybrid IGBT RC IGBT

SiC

SiC MOS

Diode

FRD

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DIP2V/SOP2V

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IGBT Module

Industrial Module

Automobile module

AC-DC Converter

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PSR Flyback Controller IC

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Non-isolated BUCK/BUCK-BOOST IC

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Power Bank Fast Charger IC

Car Charger IC

AC-DC Fast Charging Protocol IC

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DC-DC Converter IC

PoE IC

LED Lighting Driver

Dimming LED Lighting Driver

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Automotive LED Driver

Automotive Low-Voltage Motor Driver

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Gate Driver IC

Three-phase Half Bridge Driver

Single Half-bridge Driver

PFC IGBT Gate Driver

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Triaxial Acceleration Sensor

Six- Axis Inertial Sensor

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Audio Decode

Audio Effects Processing

Intelligent Audio

ASIC

Bipolar PWM Controller

Bipolar DC-DC

LDO

Volume and Sound Control Circuit

DC Drive Circuit

Darlington Circuit

Logic & Switch & Level Shift

Operational Amplifier Circuit

Comparator

Reference IC

Linear Regulator

Audio Circuit

Interface ICs

LED Chip

GaN

GaAs

Discrete Divice

LVMOS

Planar LVMOS Normal Trench LVMOS Split Gate Trench LVMOS Automotive MOSFET

HVMOS

Planar HVMOS Multi-Epi DPMOS Trench DPMOS

IGBT

Planar IGBT Trench IGBT SiC Hybrid IGBT RC IGBT

SiC

SiC MOS

Diode

FRD

IPM

DIP2V/SOP2V

DIP-23/SOP-23

DIP-24

DIP-25

DIP-Q25A

SDIP-26

DIP-27

DIP-29

SOP-30

SOP-37

DIP-T46A

IGBT Module

Industrial Module

Automobile module

AC-DC Converter

SSR Flyback Controller IC

PSR Flyback Controller IC

Synchronous Rectifier IC

Non-isolated BUCK/BUCK-BOOST IC

PFC IC

Fast Charging IC

Power Bank Fast Charger IC

Car Charger IC

AC-DC Fast Charging Protocol IC

DC-DC Converter

DC-DC Converter IC

PoE IC

LED Lighting Driver

Dimming LED Lighting Driver

Non-dimming LED Lighting Driver

Automotive LED Driver

Automotive Low-Voltage Motor Driver

Smart Power Switches

Gate Driver IC

Three-phase Half Bridge Driver

Single Half-bridge Driver

PFC IGBT Gate Driver

MEMS Sensor

Triaxial Acceleration Sensor

Six- Axis Inertial Sensor

Proximity Detection and Digital Ambient Light Sensor

Heart Rate Sensor

Silicon Microphone Sensor

MCU IC

8bit MCU

32bit MCU

Integrated Driver MCU

Digital Audio/Video

CD SERVO

Audio Decode

Audio Effects Processing

Intelligent Audio

ASIC

Bipolar PWM Controller

Bipolar DC-DC

LDO

Volume and Sound Control Circuit

DC Drive Circuit

Darlington Circuit

Logic & Switch & Level Shift

Operational Amplifier Circuit

Comparator

Reference IC

Linear Regulator

Audio Circuit

Interface ICs

LED Chip

GaN

GaAs

SD8666QS

MULTI-MODE CONTROLLER FOR SMPS WITH BUILT-IN HIGH VOLTAGE POWER MOSFET

Description Main feature Product specification classification Internal block diagram Technical documentation Relevant package outline drawing

The SD8666QS is a quasi-resonant current mode PWM+PFM controller with built-in high voltage power MOSFET, and external sensing resistor, is applicable to SMPS applications.

The SD8666QS features multi-mode control., At heavy load condition. it operates in QR mode to reduce switch loss in the high line input voltage, and it operates with fixed frequency (65KHz) in CCM mode in the low line input voltage. At medium load or light load conditions, it works in QR+PFM mode to improve the conversion efficiency. At no load condition, it enters burst mode to reduce the standby power dissipation.

The SD8666QS has frequency jitter function for low EMI. The available peak current compensation function ensures the limit output power consistency even with different AC input voltages. The soft startup reduces the device stress during power-on process.

The SD8666QS integrates comprehensive protections including VCC overvoltage protection, output over-load protection, output overvoltage protection, leading edge blanking, cycle-by-cycle peak current limit, short circuit protection for output diode, AC input voltage undervoltage protection and over temperature protection, etc.

Main feature

QR mode for low EMI and low switch loss
PFM mode at light load condition for higher conversion efficiency
Entering burst mode at no load condition
Frequency rising at low voltage and heavy load condition for high limit output power
Frequency jitter for low EMI
Peak current compensation
Soft startup
VCC overvoltage protection
Output overload protection
Leading edge blanking
Cycle-by-cycle current limit
Output diode short protection
Undervoltage protection for AC input voltage
Adjustable output overvoltage protection
Over temperature protection

Ordering Information

Product Name	Package form	Marking	Hazardous Substance Control	Packing Type	Remarks
SD8666QS	EHSOP-5-325-1.7	SD8666QS	Halogen free	Tube
SD8666QSTR	EHSOP-5-325-1.7	SD8666QS	Halogen free	Tape&Reel

Block Diagram

SD866QS 英文.png

Documents

title	Types of	Size (KB)	date	Download the latest English version
SD8666QS		0	2020-10-23	SD8666QS Brief Datasheet

Packages

EHSOP-5-325-1.7

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