s6529, Elektronika, , s
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STR-M6529 OFF-LINE SWITCHING REGULATOR STR-M6529 OFF-LINE SWITCHING REGULATOR – WITH POWER MOSFET OUTPUT DRAIN 1 The STR-M6529 is specifically designed to meet the requirement for increased integration and reliability in off-line flyback converters operating in the quasi-resonant ringing choke mode. The device incorporates the primary control and drive circuit with a discrete ava- lanche-rated high-voltage power MOSFET. SOURCE 2 OSC. FAULT LATCH R S COMMON 3 Crucial system parameters such as maximum ON time and OFF time are fixed during manufacture. Local control circuit decoupling and layout are optimized within the device. OVER-CURRENT PROTECTION 4 FAULT V IN 5 UVLO FDBK 6 REF. Cycle-by-cycle current limiting, soft start, under-voltage lock-out with hysteresis, over-voltage protection, and thermal shutdown protect the devices during all normal and overload conditions. Over-voltage protection, thermal shutdown, or an external fault signal are latched. The dual requirements of dielectric isolation and low transient thermal impedance and steady-state thermal resistance are satisfied in an over- molded single-in-line power package. FAULT-LATCH TRIGGER & SOFT START 7 Dwg. PK-002 ABSOLUTE MAXIMUM RATINGS Supply Voltage, V IN ........................... 35 V Drain-Source Voltage, V DS .............. 800 V Continuous Drain Current, I D ............ 5.4 A 1 ms Single-Pulse Drain Current, I DM ................................................. 20 A Single-Pulse Avalanche Energy, E A .............................................. 400 mJ Soft-Start/Fault-Latch Trig. Voltage, V SS/FL ............................................. 12 V Feedback Input Current, I FDBK ........ 20 mA Over-Current Protection Voltage, V OCP ............................................. 3.5 V Insulation Voltage,V WM(RMS) ........... 2000 V Package Power Diss., P D ........ See Graph FET Junction Temperature, T J ...... +150 Proven in substantial volumes, this device and its fixed-frequency counterparts represents a significant advance in off-line SMPS reliability growth and integration. FEATURES n Quasi-Resonant Ringing Choke Converter n Avalanche-Rated Power MOSFET Switch n Pulse-by-Pulse Current Limiting n Latched Over-Voltage and Thermal Protection n Maximum ON Time and OFF Time Set During Manufacture ° C n Internal Under-Voltage Lockout with Hysteresis Internal Frame Temperature, T F ... +125 ° C n Over-Molded SIP with Integral Isolated Heat Spreader Operating Temperature Range, T A ............................... -20 ° C to +125 ° C Storage Temperature Range, T stg ° C to +125 ° C Always order by complete part number: STR-M6529 . INTERIM DATA SHEET (Subject to change without notice) August 18, 1994 ............................. -40 STR-M6529 OFF-LINE SWITCHING REGULATOR FUNCTIONAL BLOCK DIAGRAM V IN 5 UVLO R 1 DRAIN OVER-VOLT. PROTECT FAULT LATCH 2 SOURCE S Q REF. TSD OSC. FAULT-LATCH TRIGGER & SOFT START 7 TRIGGER R toff R ton OVER-CURRENT PROTECTION + 4 0.75 V 1000 pF 3 COMMON 0.01 m F 6 FDBK Dwg. FK-002-2 ALLOWABLE PACKAGE POWER DISSIPATION MAXIMUM SAFE OPERATING AREA 60 100 MOUNTING SURFACE TEMPERATURE 54 W 30 40 RECOMMENDED MAX. FRAME TEMP. = +100 ° C 10 LIMITED BY r DS(on) 3.0 LIMITED BY FRAME TEMP. = +125 ° C MAX. 20 1.0 NO HEAT SINK NATURAL COOLING T = +25 A C FREE AIR 0.3 2.8 W 0 0.1 20 60 100 140 3.0 10 30 100 300 1000 TEMPERATURE in ° C DRAIN-TO-SOURCE VOLTAGE in VOLTS Dwg. GK-003-1 Dwg. GK-004-1 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ° W Copyright © 1994 Allegro MicroSystems, Inc. STR-M6529 OFF-LINE SWITCHING REGULATOR 600 500 ALLOWABLE AVALANCHE ENERGY 400 SINGLE PULSE DRAIN CURRENT = 5 A SUPPLY VOLTAGE = 50 V 300 200 100 0 0 20 40 60 80 100 120 140 160 STARTING CHANNEL TEMPERATURE in ° C Dwg. GK-009-1 ELECTRICAL CHARACTERISTICS at T A = +25 ° C, V IN = 18 V, voltage measurements are referenced to Common (pin 3) (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units On-State Voltage V INT Turn-on, increasing V IN 14.4 – 17.6 V Under-Voltage Lockout V INQ Turn-off, decreasing V IN 9.0 – 11 V Over-Voltage Threshold V OVP(th) 26 – 31 V FET Leakage Current I DSS V DS = 800 V – – 300 m A FET ON Resistance r DS(on) V GS = 10 V, I D = 2.5 A – 1.8 2.2 W Output Fall Time t f V DD = 250 V, I D = 2.5 A, 10% to 90% V DS – – 250 ns Maximum ON Time t on 22.5 – 27.5 m s Minimum OFF Time t off 2.0 – 4.0 m s Over-Current Threshold V OCP(th) 700 – 800 mV Feedback Threshold V FDBK(th) – 750 – mV Soft-Start Current I SS V SS = 0 V -2.2 – -3.4 mA Fault-Latch Threshold Volt. V FL(th) 8.0 – 9.2 V Fault-Latch Holding Current I INH V IN reduced to 8.5 V – 340 400 m A Fault-Latch Reset Voltage V INQ I IN <20 m A, V IN reduced from 31 V 6.5 – 8.5 V Insulation RMS Voltage V WM(RMS) All terminals simultaneous reference 2000 – – V metal plate against backside Supply Current I IN(ON) Operating 16 – 26 mA I IN(OFF) Start up, V IN =14 V – – 100 m A Thermal Shutdown T J 125 150 – ° C Thermal Resistance R q JM FET junction to mounting surface – 2.0 – ° C/W NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal. Typical Data is for design information only. STR-M6529 OFF-LINE SWITCHING REGULATOR TYPICAL APPLICATION WARNING: lethal potentials are present. See text. + OUTPUT 5 STR-M6529 R 1 + + 2 S Q VOLTAGE SENSE + 7 – OUTPUT H + 4 3 + 6 Dwg. EK-002-1 APPLICATIONS INFORMATION WARNING — These devices are designed to be operated at lethal voltages and energy levels. Circuit designs that embody these components must conform with applicable safety requirements. Precautions must be taken to prevent accidental contact with power-line potentials. Do not connect grounded test equipment. The use of an isolation transformer is recommended during circuit development and breadboarding. The power MOSFET outputs of these devices are similar to the International Rectifier type IRFPE40. These devices feature an excellent combination of fast switching, ruggedized device design, low on-resistance, and cost effectiveness. Recommended mounting hardware torque: 4.34 – 5.79 lbf•ft (6 – 8 kg•cm or 0.588 – 0.784 Nm). Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease: Dow Corning 340, or equivalent 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 5 STR-M6529 OFF-LINE SWITCHING REGULATOR Dimensions in Inches (Based on 1 mm = 0.03937") 0.780 ± 0.008 T REF M 0.157 ± 0.008 ± 0.008 ø 0.216 ± 0.008 0.128 ± 0.276 ± 0.02 0.216 1 7 0.100 ± 0.004 0.033 +0.008 –0.004 0.026 +0.008 – 0.004 0.177 ± 0.028 Dwg. MK-003-7 in NOTE: Exact body and lead configuration at vendor’s option within limits shown. 0.130 0.004 [ Pobierz całość w formacie PDF ] |