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FSDH321, FSDL321

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Package Dimensions

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8LSOP

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Summary of Contents for FSDH321

Page 1: ...Lock Out UVLO protection Leading Edge Blanking LEB an optimized gate turn on turn off driver Thermal Shut Down TSD protection Abnormal Over Cur rent Protection AOCP and temperature compensated preci...

Page 2: ...gram of FSDx321 8V 12V 2 6 7 8 1 3 Vref Internal Bias S Q Q R OSC Vcc Vcc IDELAY IFB VSD TSD Vovp Vcc Vocp S Q Q R R 2 5R Vcc good Vcc Drain Vfb GND AOCP Gate driver 5 Vstr ICH Vcc good VBURL VBURH LE...

Page 3: ...using an internal 5uA current source This time delay prevents false triggering under transient conditions but still allows the protection mechanism to operate under true overload conditions 4 Ipk This...

Page 4: ...and 51 10 DIP Characteristic Symbol Value Unit Drain Pin Voltage VDRAIN 650 V Vstr Pin Voltage VSTR 650 V Drain Gate Voltage VDG 650 V Gate Source Voltage VGS 20 V Drain Current Pulsed 1 IDM 1 5 A Co...

Page 5: ...ency fOSC FSDH321 90 100 110 KHz Switching Frequency Modulation fMOD 2 5 3 0 3 5 KHz Switching Frequency fOSC FSDL321 45 50 55 KHz Switching Frequency Modulation fMOD 1 0 1 5 2 0 KHz Switching Frequen...

Page 6: ...cable Programmable of default current limit Smaller transformer Allows power limiting constant over load power Allows use of larger device for lower losses and higher efficiency Frequency Modulation n...

Page 7: ...100 150 Temp Normalized Frequency Modulation FMOD vs Ta 0 00 0 20 0 40 0 60 0 80 1 00 1 20 50 0 50 100 150 Temp Normalized Maximum Duty Cycle DMAX vs Ta 0 00 0 20 0 40 0 60 0 80 1 00 1 20 50 0 50 100...

Page 8: ...0 0 80 1 00 1 20 50 0 50 100 150 Temp Normalized Peak Current Limit ILIM vs Ta 0 00 0 20 0 40 0 60 0 80 1 00 1 20 50 0 50 100 150 Temp Normalized Start Up Charging Current ICH vs Ta 0 00 0 20 0 40 0 6...

Page 9: ...tion circuits are fully inte grated inside the IC without external components the reliability is improved without increasing cost Once a fault condition occurs switching is terminated and the Sense FE...

Page 10: ...T within 350ns after it is activated Figure 7 Abnormal Over Current Protection AOCP 4 4 Over Voltage Protection OVP In the event of a mal function in the secondary side feedback circuit or an open fee...

Page 11: ...itching continues until the feedback voltage drops below VBURL 350mV At this point switching stops and the output voltages start to drop at a rate dependent on the standby current load This causes the...

Page 12: ...t pin forms a parallel resistance with the 2 8k when the internal diodes are biased by the main current source of 900uA Figure 13 Peak Current Limit Adjustment For example FSDx321 has a typical Sense...

Page 13: ...fficiency as well as lower audible noise Adjusting Sound Frequency Moving the fundamental frequency of noise out of 2 4 kHz range is the third method Generally humans are more sensi tive to noise in t...

Page 14: ...s The pule by pulse peak current limit level ILIM is set to default value 0 7A by floating the Ipk pin 4 R102 and C101 clamp the DRAIN voltage of MOSFET below 650V under all conditions 1 Schematic App...

Page 15: ...lation Polyester Tape t 0 050m m 3Layers N 5V 10 7 0 55 1 12 Solenoid w inding Insulation Polyester Tape t 0 050m m 3Layers N M V cc 4 6 0 20 1 40 Solenoid w inding Insulation Polyester Tape t 0 050m...

Page 16: ...4W D103 1N4937 PN Ultra Fast R203 2K 1 4W D201 SB360 Schottky R204 2K 1 4W ZD1 1N4746A 18V Zener ZD2 1N4746A 18V Zener Capacitor C101 10nF 630V Film IC C102 47uF 50V Electrolytic IC101 FSDH321 FPS C1...

Page 17: ...FSDH321 FSDL321 17 Package Dimensions 8DIP...

Page 18: ...FSDH321 FSDL321 18 Package Dimensions Continued 8LSOP...

Page 19: ...19 Ordering Information Product Number Package Marking Code BVDSS fOSC RDS ON FSDH321 8DIP DH321 650V 100KHz 14 FSDL321 8DIP DL321 650V 50KHz 14 FSDH321L 8LSOP DH321 650V 100KHz 14 FSDL321L 8LSOP DL32...

Page 20: ...uctions 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 failu...

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