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| www.fairchildsemi.com FSDH0165 Fairchild Power Switch(FPS) Features * * * * * * * * * * Single Chip 650V 1A SenseFET PowerSwitch Precision Fixed Operating Frequency (100kHz) Internal Start-up Switch UVLO with Hysterisis (6.7V/8.7V) Over Load Protection (typ. 4.5V) Over Current Protection (typ. 0.6A) Internal Thermal Shutdown Function Secondary Side Regulation Auto-restart mode No load consumption <250mW at 265VAC input Description The FSDH0165 is specially designed for an off-line SMPS with minimal external components. The FSDH0165 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 FSDH0165 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. 8-DIPH Applications * Charger & Adaptor for Mobile Phone, PDA & MP3 * Auxiliary Power for PC 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) 4.5V VREF UVLO 8.7V INTERNAL BIAS #8 : Drain SFET OSC S Q PWM 0.45 mA + R L.E.B 5.8V 5 uA #2 : Vfb OLP + _ 4.5V OCP S Q R TSD /4 (c)2001 Fairchild Semiconductor Corporation + _ Vth _ _ _ #3,#4,#5,#6 GND Rev.1.0.4 FSDH0165 Absolute Maximum Ratings (Ta=25C unless otherwise specified) Parameter Maximum Drain Voltage Continuous Drain Current (TC=25C) Maximum Supply Voltage Input Voltage Range Operating Ambient Temperature Storage Temperature Range Symbol VD,MAX ID VCC,MAX VFB TA TSTG Value 650 0.6 21 -0.3 to VSD -25 to +85 -55 to +150 Unit V ADC V V C C PIN Definitions Pin Number 1 Pin Name Vstr Pin Function Description 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. 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. These pins are the control ground and the SenseFET Source. 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. This pin is designed to directly drive the converter transformer and is capable of switching a maximum of 650V and 1A. 2 Vfb 3,4,5,6 7 GND Vcc 8 Drain 2 FSDH0165 Electrical Characteristics (Ta=25C unless otherwise specified) Parameter SENSEFET SECTION Drain-Source Breakdown Voltage Zero gate voltage drain current Static drain-source on Resistance Rise Time Fall Time START UP SECTION VSTR Supply Voltage UVLO SECTION Start Threshold Voltage Stop Threshold Voltage OSCILLATOR SECTION Initial accuracy Maximum Duty Cycle Minimum Duty Cycle FEEDBACK SECTION Feedback Source Current Shutdown feedback Voltage Peak Current Limit PROTECTION SECTION Thermal Shutdown Temperature (Tj) (1) TOTAL DEVICE SECTION Operating Supply Current IOPR VCC = 21V (Max) 4 mA TSD 125 145 C IFB VSD IOVER Vfb = 0V peak inductor current 0.40 4.0 0.5 0.45 4.5 0.6 0.50 5.0 0.7 mA V A FOSC Dmax Dmin Tj = 25C Vfb = 3V Vfb = 0V 90 64 100 67 0 110 70 0 kHz % % Vstart Vstop After turn on 8.0 6.0 8.7 6.7 9.4 7.4 V V VST 17 V BVDSS IDSS RDS(ON) TR TF VGS = 0V, ID = 100A VDS = 520V ID = 50mA Tj = 25C ID = 50mA Tj = 100C VDS = 325V, ID = 300mA VDS = 325V, lD = 50mA 650 15.6 25.7 100 50 100 18 30 V A nS nS Symbol Condition Min. Typ. Max. Unit CURRENT LIMIT(SELF-PROTECTION)SECTION Note: 1.These parameters, although guaranteed, are not 100% tested in production 3 FSDH0165 Typical Performance Characteristics (These characteristic graphs are normalized at Ta=25C) [V] 7.2 7.1 7 6.9 6.8 6.7 -25 0 25 50 75 100 125 Vstop [V] 8.96 8.92 8.88 8.84 8.8 8.76 Vstart 150 [C] -25 0 25 50 75 100 125 150 [C] Figure 1. Stop Threshold Voltage [mA] 2.4 2.35 0.44 2.3 2.25 2.2 0.4 2.15 2.1 -25 0 25 50 75 100 125 150 [C] 0.38 0.42 Figure 2. Start Threshold Voltage Iopr [A] 0.46 Ifb -25 0 25 50 75 100 125 150 [C] Figure 3. Operating Supply Current [kHz] 108 104 100 96 92 88 84 -25 -10 0 25 50 75 100 125 150[C] Figure 4. Feedback Source Current [A] 0.8 0.7 0.6 0.5 0.4 0.3 0.2 -25 -10 0 25 50 75 100 125 150 [C] Fosc Ipeak Figure 5. Initial Accuracy Figure 6. Peak Current Limit 4 FSDH0165 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta=25C) [mA] 3.00 2.50 2.00 1.50 1.00 0.50 0.00 0 2.5 5 7.5 10 12.5 15 17.5 Vstop Vstart [mA] 2.50 2.00 1.50 1.00 0.50 0.00 Vstr 20 [V] 1 13 25 37 49 61 73 85 97[V] Figure 7. Stop/Start Threshold Voltage [pF] Figure 8. VSTR Supply Voltage [V] 1000 Coss 800 760 BVdss 100 720 680 10 640 1 0 25 50 75 [V] 100 600 -50 0 50 100 [C] 150 Figure 9. Coss vs. Drain Voltage Figure 10. Breakdown vs. Temperature 5 FSDH0165 Application Circuit VDC Vstart 1 Start-up 8 Drain PWM 3,4,5&6 Feedback Circuit BCDMOS 1Chip 2 Vfb 7 Vcc GND 6 FSDH0165 Package Dimensions 8-DIPH 7 FSDH0165 Ordering Information Product Number FSDH0165 Package 8-DIPH Rating 650V, 1A Topr (C) -25C to +85C 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. www.fairchildsemi.com 10/17/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 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. |
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