FS6X1220RD

FS6X1220RD Datasheet

FS6X1220R

Part	Datasheet
FS6X1220RD	FS6X1220RD (pdf)

Related Parts	Information
FS6X1220RTYDTU	FS6X1220RTYDTU

PDF Datasheet Preview
FS6X1220R Fairchild Power Switch FPSTM • Current Mode PWM Control With a Fixed Operating Frequency 300kHz • Pulse by Pulse Current Limit • Over Load Protection • Over Voltage Protection • Thermal Shutdown • Built-in Auto-Restart Circuit • Line Under Voltage Detection and Sleep on/off Function • Internal High Voltage SenseFET QFET • Supports Forward or Flyback Topology Application • DC-DC Converter The FS6X1220R is specially designed for an off-line DCDC converters with minimal external components. This device is a current mode PWM controller combined with a high voltage power SenseFET in a single package. The PWM controller includes integrated fixed frequency oscillator, line under voltage lockout, sleep on/off function, thermal shutdown protection, over voltage protection, pulse-by-pulse current limit and temperature compensated precise current sources for a loop compensation. Compared with discrete MOSFET and PWM controller solution, the FS6X1220R can reduce total cost, component count, size and weight simultaneously increasing efficiency, productivity, and system reliability. This device is well suited for DC to DC converter applications up to 40W of output power. TO-220F-5L D2-PAK-5L Internal Block Diagram Drain GND VCC Feedback Line Sense Line Sense Vcc Idelay VSD Vcc Vovp TSD Line UVLO Line UVLO Vref IFB 28R Vcc good Enable Vref SQ RQ Vcc good SQ RQ Vcc 3 9V/15V Internal Bias Drain 1 Gate driver 2 GND 2005 Fairchild Semiconductor Corporation FS6X1220R Pin Description Pin Number 1 2 3 Pin Name Drain GND Vcc Feedback FB Line Sense LS Pin Function Description High voltage power SenseFET drain connection. This pin is the control ground and the SenseFET source. This pin is the positive supply input. This pin provides internal operating current for both start-up and steady-state operation. This pin is internally connected to the inverting input of the PWM comparator. The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 7.5V, the over load protection is activated resulting in shutdown of the IC. According to the voltage of this pin, three operation modes are defined Normal operation mode, Line under voltage lock out mode and Sleep mode. If the voltage of this pin is smaller than 2.55V, the IC goes into line under voltage lock out stopping switching operation. If the voltage of this pin is smaller than 1.8V, the IC enters into sleep mode. During sleep mode, reference voltage generation circuit including shunt regulator is disabled and only 300uA operation current is required. Ordering Information Product Number FS6X1220RTYDTU FS6X1220RD YDTU Forming Type Package TO-220F-5L Forming D2-PAK-5L Marking Code 6X1220R BVdss 200V Rds on Max. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 3/22/05 0.0m 001 2005 Fairchild Semiconductor Corporation

PDF Datasheet Preview

FS6X1220R

Fairchild Power Switch FPSTM
• Current Mode PWM Control With a Fixed Operating Frequency 300kHz
• Pulse by Pulse Current Limit
• Over Load Protection
• Over Voltage Protection
• Thermal Shutdown
• Built-in Auto-Restart Circuit
• Line Under Voltage Detection and Sleep on/off Function
• Internal High Voltage SenseFET QFET
• Supports Forward or Flyback Topology

Application
• DC-DC Converter

The FS6X1220R is specially designed for an off-line DCDC converters with minimal external components. This device is a current mode PWM controller combined with a high voltage power SenseFET in a single package. The PWM controller includes integrated fixed frequency oscillator, line under voltage lockout, sleep on/off function, thermal shutdown protection, over voltage protection, pulse-by-pulse current limit and temperature compensated precise current sources for a loop compensation. Compared with discrete MOSFET and PWM controller solution, the FS6X1220R can reduce total cost, component count, size and weight simultaneously increasing efficiency, productivity, and system reliability. This device is well suited for DC to DC converter applications up to 40W of output power.

TO-220F-5L

D2-PAK-5L

Internal Block Diagram

Drain GND VCC Feedback Line Sense

Line Sense

Vcc Idelay

VSD Vcc

Vovp TSD

Line UVLO

Line UVLO

Vref IFB 28R

Vcc good Enable Vref

SQ RQ

Vcc good

SQ RQ

Vcc 3
9V/15V

Internal Bias

Drain 1

Gate driver
2 GND
2005 Fairchild Semiconductor Corporation

FS6X1220R

Pin Description

Pin Number 1 2 3

Pin Name Drain GND Vcc

Feedback FB

Line Sense LS

Pin Function Description

High voltage power SenseFET drain connection.

This pin is the control ground and the SenseFET source.

This pin is the positive supply input. This pin provides internal operating current for both start-up and steady-state operation.

This pin is internally connected to the inverting input of the PWM comparator. The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 7.5V, the over load protection is activated resulting in shutdown of the IC.

According to the voltage of this pin, three operation modes are defined Normal operation mode, Line under voltage lock out mode and Sleep mode. If the voltage of this pin is smaller than 2.55V, the IC goes into line under voltage lock out stopping switching operation. If the voltage of this pin is smaller than 1.8V, the IC enters into sleep mode. During sleep mode, reference voltage generation circuit including shunt regulator is disabled and only 300uA operation current is required.
Ordering Information

Product Number FS6X1220RTYDTU FS6X1220RD YDTU Forming Type

Package TO-220F-5L Forming

D2-PAK-5L

Marking Code 6X1220R

BVdss 200V

Rds on Max.

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.

A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
3/22/05 0.0m 001 2005 Fairchild Semiconductor Corporation

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived FS6X1220RD Datasheet file may be downloaded here without warranties.

Datasheet ID: FS6X1220RD 515471