FS6X0420R FAIRCHILD | Alldatasheet
Document overview
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Technical content
Features
Current Mode PWM Control with a Fixed Operating Fre- quency (300kHz) Pulse by Pulse Current Limit Over Load Protection Over Voltage Protection Thermal Shutdown Line Under Voltage Detection and Sleep on/off Function Internal High Voltage SenseFET (200V) Supports Forward or Flyback Topology
Applications
DC-DC Converter PoE Device Related Application Notes AN4137 - Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS) AN4140 - Transformer Design Consideration for Off-line Fly- back Converters using Fairchild Power Switch AN4141 - Troubleshooting and Design Tips for Fairchild Power Switch Flyback Applications AN4148 - Audible Noise Reduction Techniques for FPS
Description
The FS6X-Series is specially designed for off-line DC-DC con- verters with minimal external components. This device com- bines a current mode PWM controller 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 com- pensated precise current sources for a loop compensation. Compared with the discrete MOSFET and PWM controller solu- tion, the FS6X-Series can reduce total cost, component count, size, and weight, while simultaneously increasing efficiency, productivity, and system reliability. Table 1. Maximum Output Power
- Maximum practical continuous power in an open
frame design at 50°C ambient.
Ordering Information
Note: 2. X : Tape & Reel OUTPUT POWER TABLE(1) PRODUCT 36VDC~72VDC FS6X0420RJ 14W FS6X0720RJ 26W FS6X1220RJ 36W Part Number Operating Temp. Range Pb-Free Package Packing Method Marking Code FS6X0420RJ -25°C to +85°C Yes D2-Pak-6L Tube 6X0420R FS6X0720RJ -25°C to +85°C Yes D2-Pak-6L Tube 6X0720R FS6X1220RJ -25°C to +85°C Yes D2-Pak-6L Tube 6X1220R FS6X0420RJX -25°C to +85°C Yes D2-Pak-6L Tape & Reel 6X0420R FS6X0720RJX -25°C to +85°C Yes D2-Pak-6L Tape & Reel 6X0720R FS6X1220RJX(2) -25°C to +85°C Yes D2-Pak-6L Tape & Reel 6X1220R
Figure 3. Pin Configuration (Top View) This pin is the high voltage power SenseFET drain connection. This pin is the control ground and the SenseFET source. start-up and steady-state operation. protection is activated resulting in shutdown of the IC. operation. If the voltage of this pin is smaller than 1.8V, the IC enters into sleep mode. disabled and only 300uA operation current is required.
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™) Absolute Maximum Ratings (Ta=25°C, unless otherwise specified.) Note: 1. Repetitive rating: Pulse width limited by maximum junction temperature. Thermal Impedance Note: 1. Infinite cooling condition - Refer to the SEMI G30-88. Parameter Symbol Value Unit Drain-source Voltage VDSS 200 V Pulsed Drain Current (Tc=25°C)(1) IDM FS6X0420RJ 10.2 A FS6X0720RJ 16.2 FS6X1220RJ 23.7 Continuous Drain Current (Tc=25°C) ID FS6X0420RJ 3.4 A (rms) FS6X0720RJ 5.4 FS6X1220RJ 12.4 Continuous Drain Current (Tc=100°C) ID FS6X0420RJ 2.1 A (rms) FS6X0720RJ 3.4 FS6X1220RJ 7.9 Supply Voltage VCC V Input Voltage Range VFB -0.3 to VCC V Total Power Dissipation (Tc=25°C) PD FS6X0420RJ W FS6X0720RJ FS6X1220RJ 125 Operating Junction Temperature Tj Internally limited Operating Ambient Temperature TA -25 to +85 Storage Temperature Range TSTG -55 to +150 Parameter Symbol Value Unit Junction-to-Ambient Thermal θJA °C/W Junction-to-Case Thermal(1) θJC FS6X0420RJ 2.9 °C/W FS6X0720RJ 2.3 FS6X1220RJ 1.0
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™)
Electrical Characteristics
(Ta=25°C, unless otherwise specified.) Notes: 1. Pulse test: Pulse width ≤ 300μS, duty ≤ 2%. 2. These parameters, although guaranteed at the design, are not tested in mass production. 3. These parameters indicate the inductor current. Parameter Symbol Condition Min. Typ Max. Unit SENSE FET SECTION Drain Source Breakdown Voltage BVDSS VGS = 0V, ID = 250μA 200 220 V Zero Gate Voltage Drain Current IDSS VDS = 200V, VGS = 0V 250 μA VDS = 160V VGS = 0V, TC = 125°C 250 μA Static Drain Source on Resistance (1) RDS(ON) FS6X0420RJ VGS = 10V, ID = 2.5A 1.2 1.5 Ω FS6X0720RJ 0.64 0.75 FS6X1220RJ 0.24 0.30 Output Capacitance COSS FS6X0420RJ VGS = 0V VDS = 25V, f = 1MHz pF FS6X0720RJ FS6X1220RJ 125 160 CONTROL SECTION Initial Frequency FOSC 270 300 330 kHz Voltage Stability FSTABLE 12V ≤ Vcc ≤ 23V Temperature Stability (2) ΔFOSC -25°C ≤ Ta ≤ 85°C ±10 Maximum Duty Cycle DMAX Minimum Duty Cycle DMIN Start Threshold Voltage VSTART VFB = GND V Stop Threshold Voltage VSTOP VFB = GND V Feedback Source Current IFB VFB = GND 0.7 0.9 1.1 mA PROTECTION SECTION Peak Current Limit (3) ILimit FS6X0420RJ 1.2 1.4 1.6 A FS6X0720RJ 2.3 2.7 3.1 FS6X1220RJ 2.8 3.2 3.6 Over Voltage Protection VOVP VCC > 6.9V V Thermal Shutdown Temperature (2) TSD 140 160 Shutdown Feedback Voltage VSD VFB ≥ 6.9V 6.9 7.5 8.1 V Shutdown Delay Current IDELAY VFB = 5V 4.0 5.0 6.0 μA
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™) (Ta=25°C, unless otherwise specified.) Notes: 1. This parameter is the current flowing into the control IC. Parameter Symbol Condition Min. Typ Max. Unit TOTAL DEVICE SECTION Startup Current (1) Istart VFB = GND, VCC = 14V 120 uA Sleep Mode Current ISLEEP V = 1V, VCC = 16V 300 500 uA Operating Supply Current (1) IOP VFB = GND, VCC = 16V mA IOP(MIN) VFB = GND, VCC = 12V IOP(MAX) VFB = GND, VCC = 20V Line UVLO Threshold Voltage VLU 2.4 2.55 2.7 V Sleep On/Off Threshold Voltage VSL 1.5 1.8 2.1 V
unless Vcc goes below the stop voltage of 9V. Figure 16. Relation between Supply Current and Figure 17. Pulse Width Modulation (PWM) Cir- over voltage protection (OVP), and thermal shutdown (TSD). increase with the current provided through the start-up resistor. Figure 18. Auto Restart Operation After Protec-
3.1 Pulse-by-pulse Current Limit
is limited by the inverting input of PWM comparator (Vfb*). which limits the peak value of the power MOSFET drain current.
3.2 Over Load Protection (OLP)
being shut down during transient situations. Figure 19. Over Load Protection
3.3 Over Voltage Protection (OVP)
the secondary side until the over load protection is activated. operation, Vcc should be properly designed to be below 25V.
3.4 Thermal Shutdown (TSD)
and only 300mA operation current is required. Figure 20. Line Sense Block
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™) Typical Application Circuit High switching frequency(300kHz) High power density Low component count Enhanced system reliability through various protection functions Key Design Notes Capacitor C104 is employed to reduce the noise on sensed line voltage. The delay time for over load protection is designed to be about 12ms with C103 of 22nF. If a faster triggering of OLP is required, C103 can be reduced to 10nF. 1. Schematic Figure 21. Demo Circuit
Figure 22. Transformer Schematic Diagram
- Electrical Characteristics
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™) 6. Demo Circuit Part List Part Value Note Part Value Note Resistor Capacitor R101 200K 1/4W C101 47uF/100V Electrolytic Capacitor R102 100K 1/4W C102 22uF/50V Electrolytic Capacitor R104 1/4W C103 22uF/50V Ceramic Capacitor R105 18K 1/4W C104 1nF/50V Ceramic Capacitor R210 40K 1/4W C201 10uF/25V Ceramic Capacitor R201 1/4W C202 10F/25V Ceramic Capacitor R211 1/4W C203 10F/25V Ceramic Capacitor R212 30K 1/4W C204 10F/25V Ceramic Capacitor R213 18K 1/4W C205 330uF/16V Electrolytic Capacitor R214 18K 1/4W C210 10nF/50V Ceramic Capacitor R221 15K 1/4W C221 1nF/50v Ceramic Capacitor R222 15K 1/4W C222 1nF/50v Ceramic Capacitor R223 15K 1/4W C301 2.2nF/1kv Film R301 10K 1/4W Diode IC D102 1N4148 IC101 FS6X1220RJ FPSTM D103 P6KE160CA TVS IC201 FOD2741 Optocoupler D201 STPS15L25G Inductor L201 2.2uH
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™) Mechanical Dimensions D2-Pak-6L Unit: mm
www.fairchildsemi.com FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1 FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPS™) 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. TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. 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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. 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, or (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 significant injury to the user. 2. A critical component is 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. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Preliminary No Identification Needed Obsolete This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Formative or In Design First Production Full Production Not In Production ISOPLANAR™ LittleFET™ MICROCOUPLER™ MicroFET™ MicroPak™ MICROWIRE™ MSX™ MSXPro™ OCX™ OCXPro™ OPTOLOGIC® OPTOPLANAR™ PACMAN™ POP™ Power247™ PowerEdge™ FAST® FASTr™ FPS™ FRFET™ GlobalOptoisolator™ GTO™ HiSeC™ I2C™ i-Lo™ ImpliedDisconnect™ IntelliMAX™ Rev. I18 ACEx™ ActiveArray™ Bottomless™ Build it Now™ CoolFET™ CROSSVOLT™ DOME™ EcoSPARK™ E2CMOS™ EnSigna™ FACT™ FACT Quiet Series™ PowerSaver™ PowerTrench® QFET® QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ RapidConnect™ μSerDes™ ScalarPump™ SILENT SWITCHER® SMART START™ SPM™ Stealth™ SuperFET™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TCM™ TinyLogic® TINYOPTO™ TruTranslation™ UHC™ UltraFET® UniFET™ VCX™ Wire™ Across the board. Around the world.™ The Power Franchise® Programmable Active Droop™