SG6980SZ

SG6980SZ Datasheet

SG6980

Part	Datasheet
SG6980SZ	SG6980SZ (pdf)

PDF Datasheet Preview
Single-Stage PFC Controller FEATURES OVERVIEW - Innovative switching-charge multiplier divider - Multi-vector control for improved PFC output transient response - 1:1 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 SG6980 The highly integrated SG6980 is designed for power supplies with boost power-factor-correction PFC . It requires very few external components to achieve desirable operation and includes versatile protections / 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, SG6980 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 the setting level. This signal can be used to control the second forward stage for proper power-on sequence. In addition, SG6980 provides complete protection functions, such as brownout and RI open/short. SG6980 System General Corp. Version IAO33.0064.B0 September 17, 2007 Single-Stage PFC Controller MARKING DIAGRAMS SG6980TP T D = DIP S=SOP P Z = Lead Free Wafer Lot Y Year WW Week V Assembly Location Product Specification SG6980 PIN CONFIGURATION VRMS OTP RI IEA IPFC IMP IPK SYNC IAC VEA FB RDY VDD OUT GND ON/OFF ORDERING INFORMATION Pb-Free Package SG6980DZ 16-Pin DIP SG6980SZ 16-Pin SOP System General Corp. Version IAO33.0064.B0 September 17, 2007 Single-Stage PFC Controller Product Specification SG6980 PIN DESCRIPTIONS Name Pin Type Function VRMS 1 OTP 2 IPFC 5 IMP 6 SYNC 8 ON/OFF 9 GND 10 OUT 11 VDD 12 RDY 13 VEA 15 Line voltage detection. The pin is used for PFC multiplier and brownout protection. For Line-Voltage Detection brownout protection, the controller is disabled with a 195ms delay time when the VRMS voltage drops below 0.8V. There is a 200mV hysteresis for brownout protection. This pin supplies an over-temperature protection signal. A constant current is output from Over-Temperature Protection this pin. If RI is equal to the magnitude of the constant current is 50µA. 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 SG6980 is off, and auto restarts when the voltage is back to 1.4V. The resistance of a resistor connected between RI and ground determines the switching Oscillator Setting frequency. A resistance between and is recommended. The switching frequency is equal to [1560 / RI] kHz, where RI is in k:. For example, if RI is equal to 24k:, then 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. Inverting Input for PFC The inverting input of the PFC current amplifier. Proper external compensation circuits will Current Amplifier result in excellent input power factor via average-current-mode control. Non-inverting Input for The non-inverting input of the PFC current amplifier and also the output of the multiplier. PFC Current Amplifier Proper external compensation circuits result in excellent input power factor via and Output of Multiplier average-current-mode control.

PDF Datasheet Preview

Single-Stage PFC Controller

FEATURES OVERVIEW
- Innovative switching-charge multiplier divider - Multi-vector control for improved PFC output
transient response - 1:1 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

SG6980

The highly integrated SG6980 is designed for power supplies with boost power-factor-correction PFC . It requires very few external components to achieve desirable operation and includes versatile protections / 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, SG6980 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 the setting level. This signal can be used to control the second forward stage for proper power-on sequence. In addition, SG6980 provides complete protection functions, such as brownout and RI open/short.

SG6980

System General Corp. Version IAO33.0064.B0

September 17, 2007

Single-Stage PFC Controller

MARKING DIAGRAMS

SG6980TP

T D = DIP S=SOP P Z = Lead Free Wafer Lot Y Year WW Week V Assembly Location

Product Specification

SG6980 PIN CONFIGURATION

VRMS OTP

RI IEA IPFC IMP IPK SYNC

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

Pb-Free Package

SG6980DZ
16-Pin DIP

SG6980SZ
16-Pin SOP

System General Corp. Version IAO33.0064.B0

September 17, 2007

Single-Stage PFC Controller

Product Specification

SG6980

PIN DESCRIPTIONS

Name Pin Type

Function

VRMS 1 OTP 2

IPFC 5

IMP 6

SYNC 8

ON/OFF 9 GND 10 OUT 11

VDD 12

RDY 13

VEA 15

Line voltage detection. The pin is used for PFC multiplier and brownout protection. For

Line-Voltage Detection brownout protection, the controller is disabled with a 195ms delay time when the VRMS
voltage drops below 0.8V. There is a 200mV hysteresis for brownout protection.

This pin supplies an over-temperature protection signal. A constant current is output from

Over-Temperature Protection
this pin. If RI is equal to the magnitude of the constant current is 50µA. 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 SG6980 is off, and auto restarts when the voltage is back to 1.4V.

The resistance of a resistor connected between RI and ground determines the switching

Oscillator Setting
frequency. A resistance between and is recommended. The switching frequency is equal to [1560 / RI] kHz, where RI is in k:. For example, if RI is equal to 24k:,
then 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.

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

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

Non-inverting Input for The non-inverting input of the PFC current amplifier and also the output of the multiplier.

PFC Current Amplifier Proper external compensation circuits result in excellent input power factor via
and Output of Multiplier average-current-mode control.

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Datasheet ID: SG6980SZ 634739