TNY254 Power Integrations Inc., TNY254 Datasheet
TNY254
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TNY254 Summary of contents
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... And yet, they consume only about load, from 265VAC input. A simple ON/OFF control scheme also eliminates the need for loop compensation. The TNY253 and TNY254 switch at 44 kHz to minimize EMI and to allow a simple snubber clamp to limit DRAIN spike ® ...
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TNY253/254/255 BYPASS 50 A OSCILLATOR CLOCK DC MAX 1 ENABLE Figure 2. Functional Block Diagram. Pin Functional Description DRAIN (D) Pin: Power MOSFET drain connection. Provides internal operating current for both start-up and steady-state operation. BYPASS ...
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Clock signal (at the beginning of each cycle high, then the power MOSFET is turned on (enabled) for that cycle, otherwise the power MOSFET remains in the ...
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TNY253/254/255 V EN CLOCK DC MAX I DRAIN V DRAIN Figure 4. TinySwitch Operation at Heavy Load. percentage of cycles will conduct to support the power consumption of the power supply. The response time of TinySwitch ON/OFF control scheme is ...
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V EN CLOCK DC MAX I DRAIN V DRAIN Figure 6. TinySwitch Operation at Light Load. 130 kHz Switching Frequency (TNY255) The switching frequency (with no cycle skipping) is set at 130kHz. This allows the TNY255 to deliver 10W while ...
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TNY253/254/255 + Optional 120-375 VDC 0. – Figure 9. 1 Stand-by Circuit using TNY253. R1 150 Optional C1 240-375 0.01 F VDC 1 kV Figure 10 ...
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... MOSFET inside the TNY254. The inductor L1 forms a -filter in conjunction with C1 and C2. The resistor R1 damps resonances in the inductor L1. The low frequency of operation of TNY254 (44kHz) allows use of the simple -filter described above in combination with a single Y1-capacitor C8 to meet worldwide conducted EMI standards. The diode D6, ...
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... The TinySwitch is not thermally limited-the source pins are soldered to sufficient copper area to keep the die temperature at or below 100 C. This limitation does not usually apply to TNY253 and TNY254. The maximum power capability of a TinySwitch depends on the thermal environment, transformer core size and design ...
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Input Filter Capacitor + HV – S TOP VIEW TinySwitch Figure 13. Recommended PC Layout for the TinySwitch. accommodated by rating the output diode to handle the short circuit current. The short circuit current can be ...
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... TNY253 EN TNY254 (MOSFET Not Switching) TNY255 See Note B TNY253 ENABLE Open TNY254 (MOSFET Switching) See Note B, C TNY255 TNY253 TNY254 J BP See Note D, E TNY255 TNY253 TNY254 J BP See Note D, E TNY255 See Note D (1) (2) ...
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... C J di/ mA/ s TNY255 See Figure TNY253 TNY254 J TNY255 TNY253 TNY254 See Note G TNY255 TNY253/TNY254 100 TNY255 100 6 560 125 C ...
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... NOTE: This test circuit is not applicable for current limit or output characteristic measurements. Figure 14. TinySwitch General Test Circuit 7/01 Conditions SOURCE = -40 to 125 C J See Figure 14 (Unless Otherwise Specified) TNY253 TNY254 See Figure 16 TNY255 and I when ENABLE pin is shorted to ground (MOSFET not switching) S1 DSS 470 5 W 470 ...
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HV 90% DRAIN VOLTAGE 10 Figure 15. TinySwitch Duty Cycle Measurement. Typical Performance Characteristics BREAKDOWN vs. TEMPERATURE 1.1 1.0 0.9 -50 - 100 125 150 Junction Temperature ( C) DC ...
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... TNY253/254/255 Typical Performance Characteristics (Continued) CURRENT LIMIT vs. TEMPERATURE 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -50 - Junction Temperature ( C) TNY254 CURRENT LIMIT vs. di/dt 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 100 150 di/dt in mA/ s BYPASS PIN START-UP WAVEFORM 0.2 0.4 0.6 Time (ms 7/01 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 75 100 125 1.4 200 250 300 250 200 150 100 0.8 1.0 TNY253 CURRENT LIMIT vs. di/ ...
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... DRAIN CAPACITANCE POWER 50 Scaling Factors: TNY253 1.00 TNY254 1.00 40 TNY255 1. 400 600 DIP .004 (.10 TNY253/254/255 Scaling Factors: TNY253 1.00 TNY254 1.00 TNY255 1.33 0 200 400 DRAIN Voltage (V) - 600 P08A PI-2076-040501 C 15 7/01 ...
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TNY253/254/255 D S .004 (.10 - G08A .010 (.25 7/01 SMD-8 Heat Sink is 2 oz. Copper As Big As Possible ...
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Notes TNY253/254/255 C 17 7/01 ...
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TNY253/254/255 C 18 7/01 Notes ...
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Notes TNY253/254/255 C 19 7/01 ...
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TNY253/254/255 Revision Notes Leading edge blanking time (t 2) Minimum DRAIN supply current ( Updated package reference. 2) Corrected VR1 in Figure 12. 3) Corrected storage temperature, 4) Corrected spacing and font sizes in ...