MC33364 ON Semiconductor, MC33364 Datasheet
MC33364
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MC33364 Summary of contents
Page 1
... CMOS driver and cycle- by- cycle current limiting. The MC33364D1 has an internal 126 kHz frequency clamp. The MC33364D2 is available without an internal frequency clamp. The MC33364D has an internal 126 kHz frequency clamp which is pinned out, so that the designer can adjust the clamp frequency by connecting appropriate values of resistance. ...
Page 2
... FC Input AC Voltage MC33364 Vcc Startup turn 15V/ 8.1V Thermal Shutdown Watchdog Timer Frequency Clamp Figure 1. Representative Block Diagram MC33364D ZCD CS FB Vref Rsense FC R1 Figure 2. Typical Application Circuit http://onsemi.com 2 Line Vref Vcc UVLO + - 15V/ 7.6V UVLO + - Reset 15V/ var Vcc ...
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... Drain Voltage 10V Voltage at ZCD 0.7V ZCD is ignored during minimum off-time limit Figure 4. Timing Diagram in Normal Condition MC33364 VT (3.5 to 6V) Startup circuit turns on when VCC reaches the threshold VT Vref falls faster than VCC since Vref capacitor is much smaller than VCC capacitor Switching stops when Vref falls below 3 ...
Page 4
... For further information please refer to the following Application Notes; AN1594: Critical Conduction Mode, Flyback Switching Power Supply Using the MC33364. AN1681: How to keep a Flyback Switch-Mode Power Supply Stable with a Critical-Mode Controller. MAXIMUM RATINGS ( unless otherwise noted ...
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... Restart Delay Time Line Pin Leakage (V = 500 V) Line Line Startup Current ( Line V Dynamic Operating Current (50 kHz Off State Consumption ( MC33364 = 15.5 V, for typical values for min/max values Symbol = ref Reg line Reg load ...
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... Figure 7. Supply Current versus Supply Voltage 40 FC−to−Vref FC−to−Gnd 100 RESISTOR (kW) Figure 9. Minimum Off-time versus Timing Resistor on the FC Pin MC33364 500 1000 450 400 350 300 −55 −25 T Figure 6. Watchdog Timer Delay ...
Page 7
... Introduction The MC33364 series represents a variable-frequency current-mode critical-conduction solution with integrated high voltage startup and protection circuitry to implement an off-line flyback converter for modern consumer electronic power supplies. Different frequency clamp options offer different customized needs. This device series includes an integrated 700 V Very High-Voltage (VHV) start-up circuit ...
Page 8
... MC33364D1 - 6.9 us fixed minimum off-time, and MC33364D2 - no minimum off-time (FC disable). The MC33364D has a FC pin, which can vary the minimum off-time (or the maximum frequency) externally in Figure 11. If the FC pin is opened, the minimum off-time is fixed at 6.9 us. If the FC pin is grounded, the clamp is disabled, and the SMPS will always operate in critical mode ...
Page 9
... C5 rectify and filter the output voltage. The TL431, a programmable voltage reference, drives the primary side of the optoisolator to provide isolated feedback to the MC33364. The resistor divider consisting of R10 and R11 program the voltage of the TL431. The resistor R9 and the capacitors C7 and C8 provide frequency compensation of the feedback loop ...
Page 10
... This pin will be connected to the feedback pin of the MC33364, which will directly set the peak current. Starting on the secondary side of the power supply, assign the sense current through the voltage-sensing resistor divider to be approximately 0 ...
Page 11
... MOC8102. The transistor should be in saturated state at that time, so its collector resistor must sat 0.3 V ref + R collector I 5.0 mA LED Since a resistor of 5 internally connected from the reference voltage to the feedback pin of the MC33364, the external resistor can have a higher value (R )(R ) int collector R ext + int ...
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... MC33364D 10V 1.2/1.0 Watchdog Timer VREF R C10 R 0.1mF Current Sense FB 1.25V 45k Frequency 15k 2V 0.1V 10V 4k FC MC33364 + C1 10mF 400V Line StartUp Restart Delay Vcc GATE Thermal PGND shutdown clamp CS LEB AGND Figure 12. Circuit in the Design Example http://onsemi.com MBR340 6 ...
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... Figure 13. Critical Conduction Mode Flyback Converter CONVERTER TEST DATA Test Line Regulation Load Output Ripple Efficiency Power Factor Vout Iout Ch1: 2.0V/div 2.0 msec/div Ch2: 200mA/div Figure 14. Load Regulation 120V MC33364 12W 12V @ 1Amp max 90VAC − 270VAC MBRD360 D2 1N4148 R3 47k ...
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... R4 MTD1N60E 2.2 D5 MURS 160T3 Gate 1 ZCD MC33364D1 Line V 4 0.1 mF ref GND 139 Turns #28 Awg, primary winding 2 − Turns, Bifilar 2 x #26 Awg, output winding 9 − Turns #28 Awg, auxiliary winding 4 − Philips EF20−3C85 core gap for a primary inductor of 1.92 mH. ...
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... C - 0.25 (0.010 - - 0.25 (0.010 MC33364 PACKAGE DIMENSIONS (SO-8) D1, D2 SUFFIX PLASTIC PACKAGE CASE 751-07 ISSUE AA 0.25 (0.010 SEATING PLANE 0.10 (0.004 (SO-16) D SUFFIX PLASTIC PACKAGE CASE 751K-01 ISSUE ...
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... The product described herein (MC33364), may be covered by one or more of the following U.S. patents: 5,418,410; 5,862,045; 5,973,528. There may be other patents pending. GreenLine is a trademark of Motorola, Inc. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...