TOP234GN Power Integrations, TOP234GN Datasheet
TOP234GN
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TOP234GN Summary of contents
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TOP232-234 TOPSwitch-FX Family Design Flexible, EcoSmart Off-line Switcher Product Highlights Lower System Cost, High Design Flexibility • Features eliminate or reduce cost of external components • Fully integrated soft-start for minimum stress/overshoot • Externally settable accurate current limit • Wider ...
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TOP232-234 Pin Functional Description ......................................................................................................................................... 3 TOPSwitch-FX Family Functional Description ......................................................................................................... 4 CONTROL (C) Pin Operation ................................................................................................................................. 4 Oscillator and Switching Frequency ....................................................................................................................... 5 Pulse Width Modulator and Maximum Duty Cycle ................................................................................................. 5 Minimum Duty Cycle and Cycle Skipping ............................................................................................................... ...
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CONTROL ( SHUNT REGULATOR/ ERROR AMPLIFIER - + 5 (LIMIT) CURRENT LIMIT ADJUST ON/OFF MULTI- FUNCTION ( OV/UV LINE SENSE DC MAX FREQUENCY (F) ...
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TOP232-234 TOPSwitch-FX Family Functional Description Like TOPSwitch, TOPSwitch- integrated switched mode power supply chip that converts a current at the control input to a duty cycle at the open drain output of a high voltage power MOSFET. During ...
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CONTROL pin current, before the CONTROL pin voltage has had a chance to discharge to the lower threshold voltage of approximately 4.8 V (internal supply under-voltage lockout threshold). When the externally fed current charges the CONTROL pin to the shunt ...
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TOP232-234 the MOSFET gate driver. The filtered error signal is compared with the internal oscillator sawtooth waveform to generate the duty cycle waveform. As the control current increases, the duty cycle decreases. A clock signal from the oscillator sets a ...
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At power down, UV prevents auto-restart attempts after the output goes out of regulation. This eliminates power down glitches caused by the slow discharge of input storage capacitor present in applications such as standby supplies. ...
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TOP232-234 As seen above, the remote ON/OFF feature allows the TOPSwitch- turned on and off instantly cycle-by- cycle basis, with very little delay. However, remote ON/OFF can also be used as a standby or power switch ...
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Using FREQUENCY and MULTI- FUNCTION Pins FREQUENCY (F) Pin Operation The FREQUENCY pin is a digital input pin available in TO-220 package only. Shorting the FREQUENCY pin to SOURCE pin selects the nominal switching frequency of 132 kHz (Figure 10) ...
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TOP232-234 (Enabled) Output MOSFET Switching (Disabled) I (Default) LIMIT Current Limit DC (78.5%) MAX Maximum Duty Cycle MULTI FUNCTION Pin Voltage -250 -200 -150 Note: This figure provides idealized functional characteristics of the MULTI-FUNCTION pin with typical performance ...
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Typical Uses of FREQUENCY (F) Pin + DC D Input CONTROL Voltage Figure 10. Full Frequency Operation (132 kHz). Figure 12. Half Frequency Standby Mode (For High Standby Input Voltage C PI-2505-081199 Figure 11. Half Frequency Operation ...
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TOP232-234 Typical Uses of MULTI-FUNCTION (M) Pin + DC Input Voltage D M CONTROL S - Figure 13. Three Terminal Operation (MULTI-FUNCTION Features Disabled. FREQUENCY Pin Tied to SOURCE or CONTROL Pin MΩ kΩ Input Voltage ...
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Typical Uses of MULTI-FUNCTION (M) Pin (cont output or can be replaced by a manual switch. DC Input Voltage D M CONTROL Q R ON/OFF 47 kΩ Figure 19. Active-on (Fail Safe) Remote ON/OFF. + ...
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TOP232-234 Application Examples A High Efficiency Universal Input Power Supply The circuit shown in Figure 24 takes advantage of several of the TOPSwitch-FX features to reduce system cost and power supply size and to improve efficiency. This design ...
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W Multiple Output Power Supply Figure 25 shows a five output secondary regulated power supply utilizing a TOP233 for multiple output applications such as set-top box, VCR, DVD, etc. The circuit shown is designed for a 230 ...
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TOP232-234 Standby Power Supply Figure 26 shows standby application with 3.3 V and 5 V secondary outputs and primary output. The supply uses the TOP232 operating from 230 VAC or ...
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Processor Controlled Supply Turn On/Off A low cost momentary contact switch can be used to turn the TOPSwitch-FX power on and off under microprocessor control that may be required in some applications such as printers. The low power remote off ...
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TOP232-234 In addition to using a minimum number of components, TOPSwitch-FX provides many technical advantages in this type of application: 1. Extremely low power consumption in the off mode typical at 110 VAC and 160 mW typical at ...
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Key Application Considerations TOPSwitch-FX vs. TOPSwitch-ll Table 3 compares the features and performance differences between TOPSwitch-FX and TOPSwitch-II. Many of the new features eliminate the need for costly discrete component. Function TOPSwitch-II Soft-Start N/A* External Current Limit N/A* DC 67% ...
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TOP232-234 Function TOPSwitch-II Remote ON/OFF N/A* Synchronization N/A* Thermal Shutdown Latched Current Limit Tolerance ±10% (@25 °C) -8% (0 °C to100 °C) -4% (0 °C to 100 °C) DRAIN DIP 0.037" / 0.94 mm Creepage at SMD 0.037" / 0.94 ...
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Zener clamp but requires more careful design (see quick design checklist). Output Diode The output diode is selected for peak inverse voltage, output current, and thermal conditions in the application (including heat sinking, air ...
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TOP232-234 + J1 Input Filter Capacitor TOP VIEW M R1 Figure 29. Layout Considerations for TOPSwitch-FX using DIP or SMD (Using Line Sensing for Under-Voltage and Overvoltage Input Filter Capacitor Heat Sink ...
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Zener clamp, 165 V when using an RCD clamp and 185 V when using RCD clamp with current limit feed forward. For designs where operating current is significantly lower than the default current limit recommended to ...
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TOP232-234 DRAIN Voltage ............................................ -0.3 to 700 V DRAIN Peak Current: TOP232 ................................. 0.8 A TOP233 ................................. 1.6 A TOP234 ................................. 2.4 A CONTROL Voltage .......................................... -0 CONTROL Current ...............................................100 mA MULTI-FUNCTION Pin Voltage .................... -0.3 to ...
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Parameter Symbol CONTROL FUNCTIONS (cont.) PWM Gain Temperature Drift External Bias l Current B CONTROL Current at Start of Cycle Skipping Dynamic Z Impedance C Dynamic Impedance Temperature Drift Control Pin Internal Filter Pole SHUTDOWN/AUTO-RESTART Control Pin l Charging Current ...
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TOP232-234 Parameter Symbol MULTI-FUNCTION INPUT Line Under-Voltage l Threshold Current UV Line Over-Voltage or Remote ON/ I OFF Threshold OV Current and Hysteresis Remote ON/OFF Negative Threshold I REM (N) Current and Hysteresis MULTI-FUNCTION I Pin Short Circuit M (SC) ...
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Parameter Symbol FREQUENCY INPUT FREQUENCY Pin V Threshold Voltage F FREQUENCY Pin I Input Current F CIRCUIT PROTECTION Self Protection I LIMIT Current Limit I Initial Current Limit INIT Leading Edge t Blanking Time LEB Current Limit Delay t ILD ...
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TOP232-234 Parameter Symbol OUTPUT (cont.) Off-State I Current DSS Breakdown BV Voltage DSS Rise t Time R Fall t Time F SUPPLY VOLTAGE CHARACTERISTICS DRAIN Supply Voltage Shunt Regulator V Voltage C(SHUNT) Shunt Regulator Temperature Drift l CD1 Control Supply/ ...
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VOLTAGE Figure 31. Duty Cycle Measurement. 120 100 Dynamic 1 = Impedance Slope CONTROL Pin Voltage (V) Figure 32. CONTROL Pin I-V Characteristic 470 Ω 0-15 V NOTES: ...
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TOP232-234 BENCH TEST PRECAUTIONS FOR EVALUATION OF ELECTRICAL CHARACTERISTICS The following precautions should be followed when testing TOPSwitch-FX by itself outside of a power supply. The schematic shown in Figure 34 is suggested for laboratory testing of TOPSwitch-FX. When the ...
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Typical Performance Characteristics (cont.) BREAKDOWN vs. TEMPERATURE 1.1 1.0 0.9 -50 - 100 125 150 Junction Temperature (°C) INTERNAL CURRENT LIMIT vs. TEMPERATURE 1.2 1.0 0.8 0.6 0.4 0.2 0 -50 - ...
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TOP232-234 Typical Performance Characteristics (cont.) MULTI-FUNCTION PIN VOLTAGE vs. CURRENT See 1 Expanded Version 0 -300 -200 -100 0 100 200 300 400 500 MULTI-FUNCTION Pin Current (µA) CONTROL CURRENT at START of CYCLE SKIPPING ...
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Typical Performance Characteristics (cont.) C OSS vs. DRAIN VOLTAGE 1000 100 10 0 200 DRAIN Voltage (V) DRAIN CAPACITANCE POWER (132 kHz) Scaling Factors: TOP234 1.00 TOP233 0.67 TOP232 0.33 400 600 TOP232-234 Scaling Factors: 300 TOP234 1.00 TOP233 0.67 ...
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TOP232-234 .400 (10.16) .146 (3.71) .415 (10.54) .156 (3.96) + .860 (21.84) .880 (22.35) PIN 1 .050 (1.27) BSC .150 (3.81) BSC .050 (1.27) .050 (1.27) .050 (1.27) .200 (5.08) PIN 1 .150 (3.81) Y07B MOUNTING HOLE PATTERN B 34 ...
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D S .004 (.10) -E- .245 (6.22) .255 (6.48) Pin 1 .375 (9.53) -D- .385 (9.78) .128 (3.25) .132 (3.35) -T- SEATING PLANE .100 (2.54) BSC .048 (1.22) .053 (1.35) .014 (.36) ⊕ .010 (.25) ...
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... Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein, nor does it convey any license under its patent rights or the rights of others. ...