FSDM311_06 FAIRCHILD | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 19

Technical content

Features

ƒ Internal Avalanche Rugged SenseFET ƒ Precision Fixed Operating Frequency (67KHz) ƒ Advanced Burst-Mode Operation (power consumption < 0.1W at 265VAC, no-load condition) ƒ Internal Start-up Circuit ƒ Pulse-by-Pulse Current Limit ƒ Over-Voltage Protection (OVP) ƒ Over-Load Protection (OLP) ƒ Internal Thermal Shutdown Function (TSD) ƒ Auto-Restart Mode ƒ Under-Voltage Lockout (UVLO) with Hysteresis ƒ Built-in Soft-Start

Applications

ƒ Charger & Adapter for Mobile Phone, PDA & MP3 ƒ Auxiliary Power for White Goods, PC, C-TV & Monitor Related Application Notes ƒ AN-4137, AN-4141, AN-4147 (Flyback) ƒ AN-4134 (Forward) ƒ AN-4138 (Charger)

Description

The FSDM311, consisting of integrated Pulse-Width Modulator (PWM) and SenseFET, is specifically designed for high-performance, off-line Switch Mode Power Supplies (SMPS) with minimal external components. This device is an integrated high-voltage, power-switching regulator which combines a VDMOS SenseFET with a voltage mode PWM control block. The integrated PWM controller f eatures include: a fixed oscillator, Under-Voltage Lo ckout (UVLO) protection, Leading Edge Blanking (LEB), an optimized gate turn- on/turn-off driver, Thermal Shutdown (TSD) protection, and temperature-compensat ed, precision-current sources for loop-compensation and fault-protection circuitry. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSDM311 device reduces to tal component count and design size and weight; while increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for the design of cost- effective flyback converters.

Ordering Information

Product Number Package Marking Code BVDSS fOSC RDS (ON) FSDM311 8DIP DM311 650V 67KHz 14Ω FSDM311L 8LSOP DM311 650V 67KHz 14Ω FPS™ is a trademark of Fairch ild Semiconductor Corporation.

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 3 FSDM311 Green Mode Fairchild Power Switch (FPS™) Pin Assignments Figure 3 Pin Configuration (Top View) Pin Definitions Pin Number Pin Name Pin Function Description 1 GND Ground. SenseFET source terminal on primary side and internal control ground.

2 VCC

Positive supply voltage input. Although connected to an auxiliary transformer winding, current is supplied from pin 5 (Vstr) via an internal switch during start-up (see Internal Block Diagram section). When VCC reaches the UVLO upper threshold (9V), the internal start-up switch opens and device power is supplied by the auxiliary transformer winding.

3 Vfb

Feedback. Inverting input to the PWM comparator with its normal input level between 0.5V and 2.5V. It has a 0.4mA current source connected internally, while a capacitor and opto-coupler are typically connected externally. A feedback voltage of 4.5V triggers overload protection (OLP). There is a time delay while charging the external capacitor Cfb from 3V to 4.5V using an internal 5μA current source. This time delay prevents false triggering under transient conditions, but allows the protection mechanism to operate under true overload conditions. 4 NC No Connection.

5 Vstr

Start-up. This pin connects directly to the rectified AC line voltage source. At start-up, the internal switch supplies internal bias and charges an external storage capacitor placed between the VCC pin and ground. Once the VCC reaches 9V, the internal switch stops charging the capacitor. 6,7,8 Drain SenseFET Drain. The drain pins are designed to connect directly to the primary lead of the transformer and are capable of switching a maximum of 650V. Minimizing the length of the trace connecting these pins to the transformer is recommended to decrease leakage inductance.

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 4 FSDM311 Green Mode Fairchild Power Switch (FPS™) Absolute Maximum Ratings The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at t hese limits. The parametric va lues defined in the Electric al Characteristics tables are not guaranteed at the absolute maximum ratings. TA=25°C, unless otherwise specified. Symbol Parameter Value Unit VDRAIN Drain Pin Voltage 650 V VSTR Vstr Pin Voltage 650 V VDG Drain-Gate Voltage 650 V VGS Gate-Source Voltage ±20 V IDM Drain Current Pulsed(3) 1.5 A ID Continuous Drain Current (Tc=25°C) 0.5 A ID Continuous Drain Current (Tc=100°C) 0.32 A EAS Single Pulsed Avalanche Energy(4) 10 mJ VCC Supply Voltage 20 V VFB Feedback Voltage Range -0.3 to VSTOP V PD Total Power Dissipation 1.40 W TJ Operating Junction Temperature Internally limited °C TA Operating Ambient Temperature -25 to +85 °C TSTG Storage Temperature -55 to +150 °C Notes: 3. Repetitive rating: Puls e width is limited by maximum junction temperature. 4. L = 24mH, starting TJ = 25° C. Thermal Impedance FSDM311 8DIP. TA=25°C, unless otherwise specified. Symbol Parameter Value Unit θJA Junction-to-Ambient Thermal Impedance(5) 88.84 °C/W θJC Junction-to-Case Thermal Impedance(6) 13.94 °C/W Notes: 5. Free standing with no heat sink, wit hout copper clad. (Measurement Condition – Just before junction temperature TJ enters into OTP.) 6. Measured on the DRAIN pin cl ose to plastic interface. All items are tested with the standards JESD 51-2 and 51-10 (DIP).

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 5 FSDM311 Green Mode Fairchild Power Switch (FPS™)

Electrical Characteristics

TA=25°C, unless otherwise specified. Symbol Parameter Conditions Min. Typ. Max. Unit SenseFET SECTION VDS=650V, VGS=0V - - 25 IDSS Zero-Gate-Voltage Drain Current VDS=520V, VGS=0V, TC=125°C - - 200 μA RDS(ON) Drain-Source On-State Resistance(7) VGS=10V, ID=0.5A - 14 19 Ω gfs Forward Trans-Conductance VDS=50V, ID=0.5A 1.0 1.3 - S CISS Input Capacitance - 162 - COSS Output Capacitance - 18 - CRSS Reverse Transfer Capacitance VGS=0V, VDS=25V, f=1MHz - 3.8 - pF td(on) Turn-On Delay Time - 9.5 - tr Rise Time - 19 - td(off) Turn-Off Delay Time - 33 - tf Fall Time VDS=325V, ID=1.0A - 42 - ns Qg Total Gate Charge - 7.0 - Qgs Gate-Source Charge - 3.1 - Qgd Gate-Drain (Miller) Charge VGS=10V, ID=1.0A, VDS=325V - 0.4 - nC CONTROL SECTION fOSC Switching Frequency 61 67 73 KHz ΔfOSC Switching Frequency Variation(8) -25°C ≤ TA ≤ 85°C - ±5 ±10 % DMAX Maximum Duty Cycle 60 67 74 % VSTART VFB=GND 8 9 10 V VSTOP UVLO Threshold Voltage VFB=GND 6 7 8 V IFB Feedback Source Current 0V ≤ VFB ≤ 3V 0.35 0.40 0.45 mA tS/S Internal Soft-Start Time 10 15 20 ms VREF Reference Voltage(9) 4.2 4.5 4.8 V ΔVREF/ΔT Reference Voltage Variation with Temperature(8)(9) -25°C ≤ TA ≤ 85°C - 0.3 0.6 mV/°C BURST-MODE SECTION VBURH 0.6 0.7 0.8 V VBURL TJ=25°C 0.45 0.55 0.65 V VBUR(HYS) Burst-Mode Voltage Hysteresis - 150 - mV PROTECTION SECTION ILIM Peak Current Limit 0.475 0.55 0.625 A TSD Thermal Shutdown Temperature(9) 125 145 - °C VSD Shutdown Feedback Voltage 4.0 4.5 5.0 V VOVP Over-Voltage Protection 20 - - V IDELAY Shutdown Delay Current 3V ≤ VFB ≤ VSD 4 5 6 μA TOTAL DEVICE SECTION IOP Operating Supply Current (control part only) VCC ≤ 16V - 1.5 3.0 mA ICH Start-Up Charging Current VCC=0V , VSTR=50V 450 550 650 μA Notes: 7. Pulse test: Pulse width ≤ 300μs, duty ≤ 2%. 8. These parameters, although guaranteed, are tested in ED S (wafer test) process. 9. These parameters, al though guaranteed, are not 100% tested in production.

  1. Leading Edge Blanking (LEB): At the instant the

leads to incorrect pulse-by-pulse current limit protection. LEB) after the SenseFET turns on.

  1. Protection Circuit: The FSDM311 has several

power SenseFET until the fault condition is eliminated. Figure 18. Protection Block

4.1 Overload Protection (OLP): Overload is defined as

from 3V to 4.5V with a 5μA current source. Figure 19. Overload Protection (OLP)

4.2 Thermal Shutdown (TSD): The SenseFET and the

  1. Soft-Start: The FPS has an internal soft-start circuit

Figure 20. Internal Soft-Start

Figure 23. Equal Loudness Curves efficiency as well as lower audible noise. are more sensitive to noise in the range of 2~4KHz. (RF), as shown in Figure 24.

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 12 FSDM311 Green Mode Fairchild Power Switch (FPS™) Typical Application Example Application Output Power Input Voltage Output Voltage (Max. Current) 12.5W DC 275~375V 5.1V (2.5A, isolated) 15V (20mA, non-isolated) PC Standby Power (Demo board) 10W DC 120~375V 5.1V (2.0A, isolated) 15V (20mA, non-isolated) ƒ Auxiliary Power for PC Power Supply with Passive PFC DC Input Voltage 275V ~ 375V (Voltage Doubler) for 12.5W Output DC Input Voltage 120V ~ 375V (Off-Line Universal Input) for 10W Output ƒ Isolated Secondary Output 5.1V / 2.5A (max), 3.5A (peak) @VIN=275~375VDC Isolated Secondary Output 5.1V / 2.0A (max), 2.5A (peak) @VIN =120~375VDC ƒ Non-Isolated Aux-Output 15V(13~17V) / 10mA (up to 20mA) ƒ Regulation 5.1V ‚2.5% - Accuracy depends on Reference (e.g. shunt regulator or precision resistors) ƒ Low No-Load Power Consumption: < 100mW @ All Input Voltage < 820mW @ All Input Voltage, 0.5W Output ƒ High Efficiency: > 80% @ 375Vdc Input, 12.5W Output > 79% @ 160Vdc Input, 10W Output Schematic Note: The selection of aux-winding diode D2 affects Aux-Output (Vcc) regulation. If another component should be used, its validity must be verified experimentally. Figure 25. Schematic of FSDM311 PC Standby Power

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 14 FSDM311 Green Mode Fairchild Power Switch (FPS™) Winding Specification All windings should be wound tightly and evenly across the bobbin. Winding Pin(S → F) Wire (φ:mm) Turns Winding Method Top Insulation: Polyester Tape t = 0.025mm, 2 Layers(10) Wp4 f2 → 1 0.22φ ×1 53 Solenoid winding Insulation: Polyester Tape t = 0.025mm, 1 Layers(10) Wp3 2 → f2 0.22φ ×1 53 Solenoid winding Insulation: Polyester Tape t = 0.025mm, 2 Layers(11) W5v 7,8,9 → 11,12 0.55φ ×2 12 Bifilar Solenoid winding Insulation: Polyester Tape t = 0.025mm, 2 Layers(11) Wcc 5 → 6 0.35φ ×1 34 Solenoid winding Insulation: Polyester Tape t = 0.025mm, 1 Layers(10) Wp2 f1 → 2 0.22φ ×1 53 Solenoid winding Insulation: Polyester Tape t = 0.025mm, 1 Layers(10) Bottom Wp1 3 → f1 0.22φ ×1 53 Solenoid winding Notes: 10. Overlapped section length between the start and the end of insulation tape is about 3mm – see Figure 29. 11. See Figure 27 (right) and Figure 28 for details. Figure 29. Overlapped Section of Insulation Taping Magnetizing Inductance (Lm) 1 – 3 2.3mH (typical) (2.2mH < Lm ≤ 2.4mH) 67KHz, 1 V All other pins open Leakage Inductance 1 – 3 < 35μH 67KHz, 1V All other pins shorted First Resonant Frequency 1 – 3 > 630KHz All other pins open Core & Bobbin ƒ Core: EE1927S (SAMWHA Electronics, PL7 / Ae = 23.4mm2) ƒ Bobbin: Vertical, 12 pins, 6 pins at each side, 20mm width (bobbin wall to wall)

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 15 FSDM311 Green Mode Fairchild Power Switch (FPS™) Circuit Part List Item Qty. Reference Value Description 1 1 CS1 1.5nF 50V MLCC X7R, ±10% Tolerance SMD 0805 2 1 CY1 1nF AC250V Y1 Safety Capacitor 3 1 C1 10nF 1KV Ceramic 4 1 C2 1nF 1KV Ceramic 5 2 C3, C4 1000µF 10V Low ESR (40mΩ) Electrolytic (e.g. Samwha Electric WB series) 6 1 C5 470µF 10V Low ESR (70mΩ) Electrolytic (e.g. Samwha Electric WB series) 7 1 C6 47nF 50V Ceramic X7R, ±5% Tolerance 8 1 C7 150nF 50V Ceramic X7R, ±5% Tolerance 9 2 C8, C9 47μF 25V Electrolytic 10 2 D1, D2 1N4007 1A, 1000V Diode (Fairchild Semiconductor) 11 1 D3 SB540 5A, 40V Schottky Diode 12 1 D4 1N4148 200mA, 100V Fast Switching Diode (Fairchild Semiconductor) 13 1 J1 (Wire) Jumper (Test Point) 14 1 L1 1μH 3.5A Inductor 15 1 RS1 10Ω Resistor 1/4W SMD 1206 16 1 R1 10Ω Resistor 1/4W 17 1 R2 1Ω Resistor 1/4W (R3) Option for V2 Voltage Clamping 18 1 R4 6.2kΩ 2% 2% Precision Resistor 1/4W 19 1 R5 6kΩ 2% 2% Precision Resistor 1/4W 20 1 R6 20kΩ Resistor 1/4W 21 1 R7 200Ω Resistor 1/4W 22 1 R8 680Ω Resistor 1/4W 23 1 T1 EE1927S Transformer (Core: EE1927S Samwha Electronics) 24 1 U1 FSDM311 Fairchild Power Switch (Fairchild Semiconductor FPS) 25 1 U2 H11A817B Opto-coupler (Fairchild Semiconductor) 26 1 U3 KA431A Shunt Regulator (Fairchild Semiconductor) 27 1 ZD1 P6KE180A 180V TVS 28 1 ZD2 1N4763A 91V 1W Zener Diode (ZD3) Option for V2 Voltage Clamping (ZD4) Option for Protecting VFB Pin

Figure 30. PCB Layout – Top- Side Print (Top) and Bottom-Side Print (Bottom)

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 17 FSDM311 Green Mode Fairchild Power Switch (FPS™) Physical Dimensions 8-DIP Dimensions are in millimeters (inches) unless otherwise noted.

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 18 FSDM311 Green Mode Fairchild Power Switch (FPS™) Physical Dimensions (Continued) 8-LSOP Dimensions are in millimeters (inches) unless otherwise noted.

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311 Rev. 1.1.0 • 7/14/06 19 FSDM311 Green Mode Fairchild Power Switch (FPS™) 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. ACEx™ GlobalOptoisolator™ OCXPro™ μSerDes™ TinyBuck™ ActiveArray™ GTO™ OPTOLOGIC SILENT SWITCHER TinyLogic Bottomless™ HiSeC™ OPTOPLANAR™ SMART START™ TINYOPTO™ Build it Now™ I C™ PACMAN™ SPM™ TinyPower™ CoolFET™ i-Lo™ POP™ Stealth™ TinyPWM™ CROSSVOLT™ ImpliedDisconnect™ Power247™ SuperFET™ TruTranslation™ DOME™ IntelliMAX™ PowerEdge™ SuperSOT™-3 UHC™ EcoSPARK™ ISOPLANAR™ PowerSaver™ SuperSOT™-6 UltraFET E CMOS™ LittleFET™ PowerTrench SuperSOT™-8 UniFET™ EnSigna™ MICROCOUPLER™ QFET SyncFET™ VCX™ FACT™ MicroFET™ QS™ TCM™ Wire™ FACT Quiet Series™ MicroPak™ QT Optoelectronics™ TinyBoost™ FAST MICROWIRE™ Quiet Series™ FASTr™ MSX™ RapidConfigure™ Across the board. Around the world.™ FPS™ MSXPro™ RapidConnect™ Programmable Active Droop™ FRFET™ OCX™ ScalarPump™ The Power Franchise 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. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. 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 in tended for surgical implant into the body or (b) suppor t 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 ex pected to result in a significant injury of the user. 2. 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. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. Rev. I20