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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
DIP-23/SOP-23
DIP-24
DIP-25
DIP-26
DIP-27
DIP-29
SOP30
SOP-37
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
General Lighting LED Driver
Intelligent Lighting LED Driver
Gate Driver IC
Three-phase Half Bridge Driver
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
Hall
Display Drive Circuit
DC Drive Circuit
Gate Drive Circuit
Darlington Circuit
Logic circuit
Optional Amplifier
Comparator
Reference IC
Linear Regulator
Audio Circuit
Logic & Switches
Gate
Buffer/Driver
Voltage Level Translators
Flip-flops/Latches/Registers
Other Logic IC
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
DIP-23/SOP-23
DIP-24
DIP-25
DIP-26
DIP-27
DIP-29
SOP30
SOP-37
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
General Lighting LED Driver
Intelligent Lighting LED Driver
Gate Driver IC
Three-phase Half Bridge Driver
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
Hall
Display Drive Circuit
DC Drive Circuit
Gate Drive Circuit
Darlington Circuit
Logic circuit
Optional Amplifier
Comparator
Reference IC
Linear Regulator
Audio Circuit
Logic & Switches
Gate
Buffer/Driver
Voltage Level Translators
Flip-flops/Latches/Registers
Other Logic IC
LED Chip
GaN
GaAs
SD8665QS
MULTI-MODE CONTROLLER FOR SMPS WITH BUILT-IN HIGH VOLTAGE POWER MOSFET
Description Main feature Product specification classification Internal block diagram Relevant package outline drawing

The SD8665QS 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 SD8665QS 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 SD8665QS 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 SD8665QS 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
SD8665QS EHSOP-5-325-1.7-3D SD8665QS Halogen free Tube
SD8665QSTR EHSOP-5-325-1.7-3D SD8665QS Halogen free Tape&Reel
Block Diagram

SD8665QS 英文 (9000&3450, PS).png