AC
IN
DRAIN
SOURCE
CONTROL
TOPSwitch
TOPSwitch SELECTION GUIDE
OUTPUT POWER RANGE
FLYBACK
ORDER
PART
NUMBER
PFC/
BOOST
Three-terminal Off-line PWM Switch
TOP100-4
48 V
DC
100/110 V
VAC
N*
100/110
July 2009
Page 1: ...OURCE CONTROL TOPSwitch TOPSwitch TOPSwitch SELECTION GUIDE OUTPUT POWER RANGE FLYBACK ORDER PART NUMBER PFC BOOST Three terminal Off line PWM Switch TOP100 4 48 V DC 100 110 V VAC N N N N N 100 110 V...
Page 2: ...FET drain connection Provides internal bias current during start up operation via an internal switched high voltage current source Internal current sense point CONTROL Pin Error amplifier and feedback...
Page 3: ...torcloselyconnectedbetweenthe CONTROL and SOURCE pins is requiredtosupplythegatedrivecurrent The total amount of capacitance connected to this pin CT also sets the auto restart timing as well as contr...
Page 4: ...y operation VC is regulated in hysteretic mode when the power supply is latched off Overtemperature Protection Temperature protection is provided by a precision analog circuit that turns the output MO...
Page 5: ...which eliminates the need for optocoupler and secondary referenced error amplifier High voltage DC is applied to the primary winding of T1 The other side of the transformer primary is driven by Figure...
Page 6: ...is a highly accurate 15 V 30 W secondary regulatedflybackpowersupplythatwill operate from 85 to 132 VAC input voltage A TL431 shunt regulator directly senses and accurately regulates the output volta...
Page 7: ...4148 C2 1000 F 35 V T1 D1 BYV26B C7 1 nF Y1 DRAIN SOURCE CONTROL C3 120 F 25 V U2 NEC2501 U3 TL431 R4 49 9 k R5 10 k C9 0 1 F R1 510 VR1 P6KE91 L1 3 3 H F1 3 15 A J1 C6 0 1 F L2 33 mH L N CIRCUIT PERF...
Page 8: ...Switch in one of the 8 auto restart cycles indefinitely and prevent starting Shorting the CONTROL pin to the SOURCE pin will reset the TOPSwitch Toavoidthisproblemwhendoingbench evaluations it is reco...
Page 9: ...rmal Impedance JA 70 C W Thermal Impedance JC 4 2 C W 1 Unless noted all voltages referenced to SOURCE TA 25 C 2 Normally limited by internal circuitry 3 1 16 from case for 5 seconds 4 Measured at tab...
Page 10: ...IC 4 mA See Figure 13 S2 open ILIMIT tLEB tILD ISD VC RESET V V Hz A ns ns C mA V SHUTDOWN AUTO RESTART cont UV Lockout Threshold Voltage Auto restart Hysteresis Voltage Auto restart Duty Cycle Auto r...
Page 11: ...sured With Figure 8 Schematic See Note 2 IC 4 mA Output MOSFET Enabled Output MOSFET Disabled ON State Resistance OFF State Current Breakdown Voltage Rise Time Fall Time DRAIN Supply Voltage Shunt Reg...
Page 12: ...voltages well below 36 V Refer to the Low Input Voltage Specification section for details 3 This section specifies only parameters affected by low input voltage operation Drain Voltages less than 36 V...
Page 13: ...DRAIN SOURCE CONTROL NOTE This test circuit is not applicable for current limit or output characteristic measurements Figure 14 TOPSwitch General Test Circuit 120 100 80 40 20 60 0 0 2 4 6 8 10 CONTRO...
Page 14: ...s turned on every eighth cycle of the CONTROL pin oscillation If the CONTROL pin power supply is turnedonwhileinthisauto restartmode there is only a 12 5 chance that the control pin oscillation will b...
Page 15: ...4 1 00 TOP103 0 87 TOP102 0 67 TOP101 0 47 TOP100 0 27 1000 10 0 240 160 80 320 DRAIN Voltage V DRAIN Capacitance pF COSS vs DRAIN VOLTAGE 100 PI 1439 042595 Scaling Factors TOP104 1 00 TOP103 0 87 TO...
Page 16: ...E SOLDER PLATED N O P Notes 1 Package dimensions conform to JEDEC specification TO 220 AB for standard flange mounted peripheral lead package 100 inch lead spacing Plastic 3 leads issue J March 1987 2...
