FSDH0165 FAIRCHILD | Alldatasheet
Document overview
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- PDF pages: 8
Technical content
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 265V AC input
Applications
- Charger & Adaptor for Mobile Phone, PDA & MP3
- Auxiliary Power for PC
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 R CC 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 Internal Block Diagram FSDH0165 Fairchild Power Switch(FPS) #8 : Drain #3,#4,#5,#6 GND #7 : Vcc #2 : Vfb SFET 4.5V VREF OSC INTERNAL BIAS 5.8V 0.45 mA5 uA 4.5V TSD Q S R L.E.B Vth UVLO VREG(5.8V) Q S R #1 : Vstr OLP PWM OCP UVLO ≥ 8.7V UVLO ≤ 6.7V #8 : Drain #3,#4,#5,#6 GND #7 : Vcc #2 : Vfb SFET 4.5V VREF OSC INTERNAL BIAS 5.8V 0.45 mA5 uA 4.5V TSD Q S R L.E.B Vth UVLO VREG(5.8V) Q S R #1 : Vstr OLP PWM OCP UVLO ≥ 8.7V UVLO ≤ 6.7V
(Ta=25°C unless otherwise specified) PIN Definitions Parameter Symbol Value Unit Maximum Drain Voltage V D,MAX 650 V Continuous Drain Current (TC=25°C) I D 0.6 A DC Maximum Supply Voltage V CC,MAX 21 V Input Voltage Range V FB −0.3 to VSD V Operating Ambient Temperature T A −25 to +85 °C Storage Temperature Range T STG −55 to +150 °C Pin Number Pin Name Pin Function Description 1V s t r 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. 2V f b 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. 7V c c 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. 8D r a i n This pin is designed to directly drive the converter transformer and is capable of switching a maximum of 650V and 1A.
Electrical Characteristics
(Ta=25°C unless otherwise specified) Note: 1.These parameters, although guaranteed, are not 100% tested in production Parameter Symbol Condition Min. Typ. Max. Unit SENSEFET SECTION Drain-Source Breakdown Voltage BV DSS VGS = 0V, ID = 100µA 650 - - V Zero gate voltage drain current I DSS VDS = 520V - - 100 µA Static drain-source on Resistance R DS(ON) ID = 50mA Tj = 25°C - 15.6 18 Ω ID = 50mA Tj = 100°C - 25.7 30 Ω Rise Time T R VDS = 325V, ID = 300mA - 100 - nS Fall Time T F VDS = 325V, lD = 50mA - 50 - nS START UP SECTION VSTR Supply Voltage V ST -1 7 - - V UVLO SECTION 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 OSCILLATOR SECTION Initial accuracy F OSC 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 SECTION Feedback Source Current I FB Vfb = 0V 0.40 0.45 0.50 mA Shutdown feedback Voltage V SD -4 . 0 4 . 5 5 . 0 V CURRENT LIMIT(SELF-PROTECTION)SECTION Peak Current Limit I OVER peak inductor current 0.5 0.6 0.7 A PROTECTION SECTION Thermal Shutdown Temperature (Tj) (1) TSD - 125 145 - °C TOTAL DEVICE SECTION Operating Supply Current I OPR VCC = 21V (Max) - - 4 mA
3,4,5&6 GND
10/17/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 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 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.
Ordering Information
Product Number Package Rating Topr ( °°°°C) FSDH0165 8-DIPH 650V, 1A −25°C to +85°C