SG6980DDZ

SG6980DDZ Datasheet

SG6980D

Part	Datasheet
SG6980DDZ	SG6980DDZ (pdf)

Related Parts	Information
SG6980DZ	SG6980DZ

PDF Datasheet Preview
Single-Stage PFC Controller FEATURES OVERVIEW - Innovative switching-charge multiplier divider - Multi-vector control for improved PFC output transient response - 1:2 synchronous switching with SYNC - Average current mode control - Remote on/off control - Power-on sequence control - Programmable PFC output-voltage control - Cycle-by-cycle current limiting - Over-voltage and under-voltage protections - Brownout and open-loop protections - Low start-up and operating current - Active-PFC switching power supplies - TV and home appliances - Computer and telecom Product Specification SG6980D The highly integrated SG6980D is designed for power supplies with boost power-factor-correction PFC . It requires very few external components to achieve desirable operation and includes versatile protection / compensation. It is available in 16-pin DIP and SOP packages. The innovative switching-charge multiplier-divider enhances the PFC circuit’s noise immunity. The proprietary multi-vector control scheme provides a fast transient response in a low-bandwidth PFC loop, in which the overshoot and undershoot of the PFC voltage are clamped. If the feedback loop is broken, SG6980D shuts off to prevent extra-high voltage on output. The PFC gate driver can be synchronized with external SYNC signal and the switching noise can be reduced. During start-up, the RDY ready is pulled low until the PFC output voltage reaches to the setting level. This signal can be used to control the second forward stage for proper power-on sequence. In addition, SG6980D provides complete protection functions, such as brownout protection and RI open/short. SG6980 System General Corp. Version IAO33.0071.B0 September 17, 2007 Single-Stage PFC Controller MARKING DIAGRAMS SG6980DTP T D = DIP S=SOP P Z = Lead Free Wafer Lot Y Year WW Week V Assembly Location Product Specification SG6980D PIN CONFIGURATION VRMS OTP RI IEA IPFC IMP IPK SYNC IAC VEA FB RDY VDD OUT GND ON/OFF ORDERING INFORMATION Pb-Free Package SG6980DDZ 16-Pin DIP SG6980DSZ Preliminary 16-Pin SOP System General Corp. Version IAO33.0071.B0 September 17, 2007 Single-Stage PFC Controller Product Specification SG6980D PIN DESCRIPTIONS Name Pin Type Function VRMS 1 Line-Voltage Detection Line voltage detection. The pin is used for PFC multiplier and brownout protection. For brownout protection, the controller will be disabled with a 195ms delay time when the VRMS voltage drops below 0.8V. There is a 200mV hysteresis for brownout protection. OTP 2 Over-Temperature Protection This pin supplies an over temperature protection signal. A constant current is output from this pin. If RI is equal to then the magnitude of the constant current will be 50uA. An external NTC thermistor must be connected from this pin to ground. The impedance of the NTC thermistor decreases whenever the temperature increases. Once the voltage of the OTP pin drops below 1.2V, the SG6980D will be off, and will auto restart when the voltage is back to 1.4V. Oscillator Setting The resistance of a resistor connected between RI and ground determines the switching frequency. A resistor with a resistance between and is recommended. The switching frequency is equal to [1560 / RI]kHz, where RI is k:. For example, if RI is equal to 24k:, the switching frequency is 65kHz. This is the output of the PFC current amplifier. The signal from this pin is compared with an Current Amplifier Output internal sawtooth and determines the pulse width for PFC gate drive. IPFC 5 Inverting Input for PFC The inverting input of the PFC current amplifier. Proper external compensation circuits Current Amplifier result in excellent input power factor via average-current-mode control. IMP 6 Non-inverting Input for PFC Current Amplifier and Output of Multiplier The non-inverting input of the PFC current amplifier and the output of multiplier. Proper external compensation circuits results in excellent input power factor via average current mode control. Peak Current Limit The peak current setting for PFC. SYNC 8 Synchronous Signal This pin receives the external switching signal. The PFC switching can be synchronized by SYNC with 1:2 ratio. ON/OFF 9 Remote On/Off Active high. The SG6980D is disabled whenever the voltage at this pin is lower than 1V or the pin is open. When SG6980D is disabled by ON/OFF, the IDD current is lower than 35µA. GND 10 Ground

PDF Datasheet Preview

Single-Stage PFC Controller

FEATURES OVERVIEW
- Innovative switching-charge multiplier divider - Multi-vector control for improved PFC output
transient response - 1:2 synchronous switching with SYNC - Average current mode control - Remote on/off control - Power-on sequence control - Programmable PFC output-voltage control - Cycle-by-cycle current limiting - Over-voltage and under-voltage protections - Brownout and open-loop protections - Low start-up and operating current
- Active-PFC switching power supplies - TV and home appliances - Computer and telecom

Product Specification

SG6980D

The highly integrated SG6980D is designed for power supplies with boost power-factor-correction PFC . It requires very few external components to achieve desirable operation and includes versatile protection / compensation. It is available in 16-pin DIP and SOP packages. The innovative switching-charge multiplier-divider enhances the PFC circuit’s noise immunity. The proprietary multi-vector control scheme provides a fast transient response in a low-bandwidth PFC loop, in which the overshoot and undershoot of the PFC voltage are clamped. If the feedback loop is broken, SG6980D shuts off to prevent extra-high voltage on output. The PFC gate driver can be synchronized with external SYNC signal and the switching noise can be reduced. During start-up, the RDY ready is pulled low until the PFC output voltage reaches to the setting level. This signal can be used to control the second forward stage for proper power-on sequence. In addition, SG6980D provides complete protection functions, such as brownout protection and RI open/short.

SG6980

System General Corp. Version IAO33.0071.B0

September 17, 2007

Single-Stage PFC Controller

MARKING DIAGRAMS

SG6980DTP

T D = DIP S=SOP P Z = Lead Free

Wafer Lot Y Year WW Week V Assembly Location

Product Specification

SG6980D PIN CONFIGURATION

VRMS OTP

RI IEA IPFC IMP IPK SYNC

IAC VEA FB RDY VDD OUT GND ON/OFF
ORDERING INFORMATION

Pb-Free Package

SG6980DDZ
16-Pin DIP

SG6980DSZ Preliminary
16-Pin SOP

System General Corp. Version IAO33.0071.B0

September 17, 2007

Single-Stage PFC Controller

Product Specification

SG6980D

PIN DESCRIPTIONS

Name Pin Type

Function

VRMS 1

Line-Voltage Detection

Line voltage detection. The pin is used for PFC multiplier and brownout protection. For brownout protection, the controller will be disabled with a 195ms delay time when the VRMS voltage drops below 0.8V. There is a 200mV hysteresis for brownout protection.

OTP 2

Over-Temperature Protection

This pin supplies an over temperature protection signal. A constant current is output from this pin. If RI is equal to then the magnitude of the constant current will be 50uA. An external NTC thermistor must be connected from this pin to ground. The impedance of the NTC thermistor decreases whenever the temperature increases. Once the voltage of the OTP pin drops below 1.2V, the SG6980D will be off, and will auto restart when the voltage is back to 1.4V.

Oscillator Setting

The resistance of a resistor connected between RI and ground determines the switching frequency. A resistor with a resistance between and is recommended. The switching frequency is equal to [1560 / RI]kHz, where RI is k:. For example, if RI is equal to 24k:, the switching frequency is 65kHz.

This is the output of the PFC current amplifier. The signal from this pin is compared with an Current Amplifier Output
internal sawtooth and determines the pulse width for PFC gate drive.

IPFC 5

Inverting Input for PFC The inverting input of the PFC current amplifier. Proper external compensation circuits

Current Amplifier
result in excellent input power factor via average-current-mode control.

IMP 6

Non-inverting Input for PFC Current Amplifier and Output of Multiplier

The non-inverting input of the PFC current amplifier and the output of multiplier. Proper external compensation circuits results in excellent input power factor via average current mode control.

Peak Current Limit

The peak current setting for PFC.

SYNC 8

Synchronous Signal

This pin receives the external switching signal. The PFC switching can be synchronized by SYNC with 1:2 ratio.

ON/OFF 9

Remote On/Off

Active high. The SG6980D is disabled whenever the voltage at this pin is lower than 1V or the pin is open. When SG6980D is disabled by ON/OFF, the IDD current is lower than 35µA.

GND 10

Ground

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Datasheet ID: SG6980DDZ 634738