tny274 Power Integrations, Inc., tny274 Datasheet
tny274
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tny274 Summary of contents
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... Chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio, shavers, etc. ® + Wide-Range HV DC Input Figure 1. Typical Standby Application. PRODUCT TNY274 TNY275 TNY276 TNY277 TNY278 TNY279 TNY280 Table 1. Notes: 1. Minimum continuous power in a typical non- ventilated enclosed adapter measured at 50 ° ...
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... TNY274-280 BYPASS/ MULTI-FUNCTION (BP/M) LINE UNDER-VOLTAGE 115 µA 25 µA 6.4 V ENABLE 1 OSCILLATOR ENABLE/ 1.0 V UNDER- VOLTAGE (EN/UV) Figure 2. Functional Block Diagram. Pin Functional Description DRAIN (D) Pin: This pin is the power MOSFET drain connection. It provides internal operating current for both startup and steady-state operation. BYPASS/MULTI-FUNCTION (BP/M) Pin: This pin has multiple functions: 1 ...
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... Extremely low power consumption of the internal circuitry allows TinySwitch-III to operate continuously from current it takes from the DRAIN pin. A bypass capacitor value of 0.1 µF is sufficient for both high frequency decoupling and energy storage. 10 TNY274-280 ) and the clock signal that MAX 3 G 6/06 ...
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... TNY274-280 In addition, there is a 6.4 V shunt regulator clamping the BYPASS/MULTI-FUNCTION pin at 6.4 V when current is provided to the BYPASS/MULTI-FUNCTION pin through an external resistor. This facilitates powering of TinySwitch-III externally through a bias winding to decrease the no-load consumption to well below 50 mW. BYPASS/MULTI-FUNCTION Pin Undervoltage The BYPASS/MULTI-FUNCTION pin undervoltage circuitry disables the power MOSFET when the BYPASS/MULTI- FUNCTION pin voltage drops below 4 ...
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... At high loads, the state machine sets the current limit to its highest value. At lighter loads, the PI-2749-050301 state machine sets the current limit to reduced values CLOCK DC MAX I DRAIN V DRAIN PI-2667-090700 Figure 8. Operation at Medium Loading. TNY274-280 PI-2377-082305 5 G 6/06 ...
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... TNY274-280 V EN CLOCK D MAX I DRAIN V DRAIN Figure 9. Operation at Very Light Load. At near maximum load, TinySwitch-III will conduct during nearly all of its clock cycles (Figure 6). At slightly lower load, it will “skip” additional cycles in order to maintain voltage regulation at the power supply output (Figure 7). At medium loads, cycles will be skipped and the current limit will be reduced (Figure 8) ...
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... The higher current limit level of the TNY280 is set to 850 mA typical. The TNY274 MOSFET does not have the capability for increased current limit so this feature is not available in this device. ...
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... TNY274-280 D1 D2 1N4007 1N4007 6.8 µF 400 V 85-265 RV1 VAC 275 VAC 1N4007 1N4007 *R5 and R8 are optional components † configurable to adjust U1 current limit, see circuit description Figure 14. TNY278P Universal Input Power Supply. Applications Example The circuit shown in Figure low cost, high efficiency, fl ...
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... BP/M pin. In addition to an internal filter, the BP/M pin capacitor forms an external filter providing noise immunity from inadvertent triggering. For the bypass capacitor to be effective as a high frequency filter, the capacitor should be located as close as possible to the SOURCE and BP/M pins of the device. TNY274-280 * P limit of ≥0. ...
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... TNY274-280 230 VAC ±15% PRODUCT I -1 LIMIT TNY274 TNY275 10.8 TNY276 11.8 TNY277 15.1 TNY278 19.4 TNY279 23.7 TNY280 Table 2. Minimum Practical Power at Three Selectable Current Limit Levels. For best performance of the OVP function recommended that a relatively high bias winding voltage is used, in the range of 15 V-30 V ...
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... Parasitic leakage currents into the EN/UV pin are normally well below this 1 µA threshold when PC board assembly well controlled production facility. However, high humidity conditions together with board and/or package contamination, TNY274-280 Maximize hatched copper areas ( ) for optimum heatsinking ...
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... TNY274-280 either from no-clean flux or other contaminants, can reduce the surface resistivity enough to allow parasitic currents >1 µA to flow into the EN/UV pin. These currents can flow from higher voltage exposed solder pads close to the EN/UV pin such as the BP/M pin solder pad preventing the design from starting up. ...
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... DRAIN Voltage .................................. ..............-0 700 V DRAIN Peak Current: TNY274.......................400 (750) mA TNY275.....................560 (1050) mA TNY276.....................720 (1350) mA TNY277.....................880 (1650) mA TNY278...................1040 (1950) mA TNY279 ................. 1200 (2250) mA TNY280 ................. 1360 (2550) mA EN/UV Voltage ................................................... -0 EN/UV Current ........................................................... 100 mA BP/M Voltage .................................................. ....-0 Storage Temperature ......................................-65 °C to 150 °C Operating Junction Temperature .................-40 ° ...
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... BP °C TNY275-279 J See Note C, D TNY280 See Note °C J di/ mA/µs TNY274P °C J TNY274G See Note E di/ mA/µs TNY275P °C J TNY275G See Note E di/ mA/µs TNY276P °C J TNY276G See Note E di/ mA/µs TNY277P °C ...
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... °C J TNY278G See Notes E di/dt = 130 mA/µs TNY279P °C J TNY279G See Notes E di/dt = 150 mA/µs TNY280P °C J TNY280G See Notes E TNY274-280 Min Typ Max Units 196 210 233 196 210 237 233 250 277 233 250 283 256 275 305 ...
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... Standard Current Limit LIMIT(TYP) × f TNY274-280G OSC(TYP) Reduced Current TNY274-280P Limit TNY274-280G LIMITred(TYP) × f OSC(TYP) TNY274-280P Increased Current Limit LIMITinc(TYP) × f TNY274-280G OSC(TYP) See Figure °C, See Note °C J See Note °C ...
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... J TNY279-280 See Note 375 6 °C BP See Note G, I EN/ 6 EN/UV See Note ° °C J See Note °C J TNY274-280 Min Typ Max Units 7.8 9.0 11.7 13.5 5.2 6.0 7.8 9.0 Ω 3.9 4.5 5.8 6.7 2.6 3.0 3.9 4.5 50 100 µA 200 15 700 ...
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... E. For current limit at other di/dt values, refer to Figure 23. F. TNY274 does not set an increased current limit value, but with a 10 µF BP/M pin capacitor the current limit is the same as with a 1 µF BP/M pin capacitor (reduced current limit value). G. This parameter is derived from characterization. ...
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... VOLTAGE 10 Figure 17. Duty Cycle Measurement. 470 Ω 470 Ω MΩ 150 V 0.1 µF DC MAX (internal signal) 90% EN/ DRAIN OSC PI-2048-033001 Figure 18. Output Enable Timing. 0.8 Figure 19. Current Limit Envelope. TNY274-280 PI-4079-080905 EN/UV PI-2364-012699 G 6/06 19 ...
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... TNY277 90 mA/µs typical current limit TNY278 110 mA/µs specified for the 0.2 TNY279 130 mA/µs appropriate BP/M TNY280 150 mA/µs capacitor Normalized di/dt 100 Scaling Factors: TNY274 1.0 TNY275 1.5 TNY276 2.0 TNY277 3.5 10 TNY278 5.5 TNY279 7.3 TNY280 100 200 300 400 ...
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... Typical Performance Characteristics (cont.) 50 Scaling Factors: TNY274 1.0 40 TNY275 1.5 TNY276 2.0 TNY277 3.5 30 TNY278 5.5 TNY279 7.3 TNY280 200 400 DRAIN Voltage (V) Figure 26. Drain Capacitance Power. 1.2 1.0 0.8 0.6 0.4 0.2 0 -50 -25 600 Figure 27. Undervoltage Threshold vs. Temperature. TNY274-280 100 125 Junction Temperature (° 6/06 ...
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... TNY274-280 PART ORDERING INFORMATION TNY 278 ⊕ .004 (.10) -E- .240 (6.10) .260 (6.60) Pin 1 .367 (9.32) -D- .387 (9.83) .125 (3.18) .145 (3.68) -T- SEATING PLANE .100 (2.54) BSC .048 (1.22) .053 (1.35) .014 (.36) ⊕ .010 (.25) M .022 (.56 6/06 TinySwitch Product Family Series Number Package Identifier G Plastic Surface Mount SMD-8C ...
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... Solder Pad Dimensions MINIMUM .057 (1.45) .068 (1.73) (NOTE 5) .004 (.10) .009 (.23) .036 (0.91) .004 (.10) .044 (1.12) .012 (.30) TNY274-280 Notes: .060 .046 1. Controlling dimensions are inches. Millimeter sizes are shown in parentheses. .080 2. Dimensions shown do not include mold flash or other protrusions. Mold flash or protrusions shall not exceed ...
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... TNY274-280 Revision Notes D Release final data sheet. E Corrected figure numbers and references. F Seperated current limit and power coefficient values for G package and updated Figure 15. Added EN/UV and PC board leakage currents in Key Applications Considerations section. G Updated line undervoltage current threshold to 2 µA. ...