www.fairchildsemi.com FSDH565 Fairchild Power Switch(FPS) Features Description • • • • • • • • • • The FSDH565 is specially designed for an off-line SMPS with minimal external components. The FSDH565 is a monolithic high voltage power switching regulator that combine the SenseFET(LDMOS) with voltage mode PWM control block. Included PWM controller features integrated fixed oscillator, under voltage lock out, leading edge blanking, optimized gate turn-on/turn-off driver, thermal shut down protection and temperature compensated precision current sources for loop compensation and fault protection circuitry. compared to discrete MOSFET and controller or RCC switching converter solution, a FSDH565 can reduce total component count, design size, weight and at the same time increase efficiency, productivity, and system reliability. It has a basic platform well suited for cost effective design in a flyback converter. Single Chip 650V 0.5A SenseFET Power Switch Precision Fixed Operating Frequency (100kHz) Internal Start up Switch UVLO with Hysteresis (6.7V/8.7V) Over Load Protection Over Current Protection (0.3A) Internal Thermal Shutdown Function Secondary Side Regulation Auto-restart mode No load consumption <250mW at 265VAC input Applications • Charger & Adaptor for Mobile Phone, PDA & MP3 • Auxiliary Power for PC, C-TV, Monitor 8-DIPH 1 1.Vstr 2.Vfb 3.4.5.6.GND 7.Vcc 8.Drain Internal Block Diagram #1 : Vstr UVLO ≤ 6.7V #7 : Vcc UVLO VREG(5.8V) UVLO ≥ 8.7V 4.5V VREF #8 : Drain INTERNAL BIAS SFET OSC S 5.8V Q PWM 5 uA 0.45 mA R + L.E.B _ #2 : Vfb + OCP _ OLP + Vth _ S 4.5V Q R TSD #3,#4,#5,#6 GND ÷4 Rev.1.0.2 ©2001 Fairchild Semiconductor Corporation FSDH565 Absolute Maximum Ratings (Ta=25°C unless otherwise specified) Parameter Maximum Drain Voltage Continuous Drain Current (TC=25°C) Maximum Supply Voltage Input Voltage Range Operating Ambient Temperature Storage Temperature Range Symbol Value Unit VD,MAX 650 V ID 0.3 ADC VCC,MAX 21 V VFB −0.3 to VSD V TA −25 to +85 °C TSTG −55 to +150 °C PIN Definitions Pin Number Pin Name Pin Function Description Vstr This pin connects directly to the rectified AC line voltage source. At start up the internal switch supplies internal bias and charges an external capacitor that connects from the Vcc pin to ground. once this reaches 8.7V, Vstr is isolated internally. 2 Vfb This pin is the inverting input of the PWM comparator, and it operates normally between 0.5V and 2.5V. It has a 0.45mA current source connected internally and a capacitor and opto coupler connected externally. A feedback voltage of 3.5V to 4.5V triggers overload protection (OLP). There is a time delay due to the 5uA current source, which prevents false triggering under transient conditions but still allows the protection mechanism to operate under true overload conditions. 3, 4, 5, 6 GND These pins are the control ground and the SenseFET Source. 7 Vcc This is the positive supply voltage input. During start up, power is supplied to this input from Pin 1. When Vcc reaches the UVLO upper threshold (8.7V), the start up Internal Switch (Vstr) turns off and power is supplied from auxiliary transformer winding. 8 Drain 1 2 This pin is designed to directly drive the converter transformer and is capable of switching a maximum of 650V and 1A. FSDH565 Electrical Characteristics (Ta=25°C unless otherwise specified) Parameter Symbol Condition Min. Typ. Max. Unit 650 - - V SENSEFET SECTION Drain-Source Breakdown Voltage Zero gate voltage drain current Static drain-source on Resistance BVDSS IDSS RDS(ON) VGS = 0V, ID = 100µA VDS = 520V - - 100 µA ID = 50mA Tj = 25°C - 36 39 Ω ID = 50mA Tj = 100°C - 51 59 Ω Rise Time TR VDS = 325V, ID = 300mA - 100 - nS Fall Time TF VDS = 325V, lD = 50mA - 50 - nS VST - 17 - - V Start Threshold Voltage Vstart - 8.0 8.7 9.4 V Stop Threshold Voltage Vstop After turn on 6.0 6.7 7.4 V Initial accuracy FOSC Tj = 25°C 90 100 110 kHz Maximum Duty Cycle DMAX Vfb = 3V 64 67 70 % Minimum Duty Cycle DMIN Vfb = 0V - 0 0 % Feedback Source Current IFB Vfb = 0V 0.40 0.45 0.50 mA Shutdown feedback Voltage VSD 4.0 4.5 5.0 V 0.25 0.3 0.35 A 125 145 - °C - - 3.5 mA START UP SECTION VSTR Supply Voltage UVLO SECTION OSCILLATOR SECTION FEEDBACK SECTION - CURRENT LIMIT(SELF-PROTECTION)SECTION Peak Current Limit IOVER peak inductor current PROTECTION SECTION Thermal Shutdown Temperature (Tj) (1) TSD - TOTAL DEVICE SECTION Operating Supply Current IOP VCC = 9.5V (Max) Note: 1. These parameters, although guaranteed, are not 100% tested in production 3 FSDH565 Typical Performance Characteristics (These characteristic graphs are normalized at Ta=25°C) BVdss BVdss[V] Idss Idss[nA] 800 5000 790 4500 780 4000 770 3500 760 3000 750 2500 740 2000 730 1500 720 1000 500 710 0 700 -25 0 25 50 75 100 125 -25 0 25 50 75 100 Figure 1. Breakdown vs.Temperature Figure 2. Zero gate voltage drain current vs.Temperature Vstart Vstart[V] 125 Temperature[℃] Temperature[℃] Vstop Vstop[V] 8.8 6.8 8.7 6.75 6.7 8.6 6.65 8.5 6.6 8.4 6.55 8.3 6.5 -25 0 25 50 75 100 125 -25 0 25 50 75 100 Figure 3. Start Threshold Voltage Figure 4. Stop Threshold Voltage Iop Iop[mA] 125 Temperature[℃] Temperature[℃] Vstr Vstr[V] 2.55 22 21 2.5 20 2.45 19 2.4 18 2.35 17 2.3 16 15 2.25 -25 0 25 50 75 100 125 Temperature[℃] Figure 5.Operating Supply Current 4 -25 0 25 50 75 100 125 Temperature[℃] Figure 6.Vstr Supply Voltage FSDH565 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta=25°C) OSC Frequency[Khz] Ifb IBias Ibias[uA] 460 110 450 105 440 100 430 95 420 410 90 -25 0 25 50 75 100 125 Temperature[℃] -25 0 25 50 75 100 125 Temperature[℃] Figure 8. Feedback Source Current Figure 7. Output Frequency IPeak IPeak(A) 0.31 0.3 0.29 0.28 0.27 0.26 0.25 -25 0 25 50 75 100 125 Temperature[℃] Figure 9. Peak Current Limit 5 FSDH565 Typical Circuit VDC Vstart 1 Start-up 8 Drain PWM 3,4,5&6 BCDMOS 1Chip 2 7 Vfb 6 GND Vcc Feedback Circuit FSDH565 Package Dimensions 8-DIPH 7 FSDH565 Ordering Information Product Number Package Rating Topr (°°C) FSDH565 8-DIPH 650V, 0.5A −25°C to +85°C 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: 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, 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. 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. www.fairchildsemi.com 10/17/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation