RDK-91 Power Integrations, RDK-91 Datasheet
![KIT DESIGN REF TINYSWITCH-III](/photos/9/12/91298/rdk-91_sml.jpg)
RDK-91
Specifications of RDK-91
Related parts for RDK-91
RDK-91 Summary of contents
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TNY274-280 ® TinySwitch-III Family Energy-Effi cient, Off-Line Switcher With Enhanced Flexibility and Extended Power Range Product Highlights Lowest System Cost with Enhanced Flexibility Simple ON/OFF control, no loop compensation needed • Selectable current limit through BP/M capacitor value • Higher ...
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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 ...
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A modulation of the threshold current reduces group pulsing. The threshold current is between 75 μA and 115 μA. The EN/UV pin also senses line undervoltage conditions through an ...
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TNY274-280 Over Temperature Protection The thermal shutdown circuitry senses the die temperature. The threshold is typically set at 142 °C with 75 °C hysteresis. When the die temperature rises above this threshold the power MOSFET is disabled and remains disabled ...
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In a typical implementation, the EN/UV pin is driven by an optocoupler. The collector of the optocoupler transistor is connected to the EN/UV pin and the emitter is connected to the SOURCE pin. The optocoupler LED is connected in series ...
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TNY274-280 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 ...
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Power Up/Down The TinySwitch-III requires only a 0.1 μF capacitor on the BYPASS/MULTI-FUNCTION pin to operate with standard current limit. Because of its small size, the time to charge this capacitor is kept to an absolute minimum, typically 0.6 ms. ...
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TNY274-280 D1 D2 1N4007 1N4007 F1 3. 6.8 μF 400 V RV1 85 - 265 VAC 275 VAC D3 D4 1N4007 1N4007 *R5 and R8 are optional components † used to adjust U1 current limit. See ...
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Undervoltage lockout is confi gured by R5 connected between the DC bus and EN/UV pin of U1. When present, switching is inhibited until the current in the EN/UV pin exceeds 25 μA. This allows the startup voltage to be programmed ...
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TNY274-280 value (10 Ω Ω) resistor in series with the bias winding diode and/or the OVP Zener as shown by R7 and R3 in Figure 14. The resistor in series with the OVP Zener also limits the maximum ...
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HV Input Filter Capacitor - TOP VIEW S Figure 15. Recommended Circuit Board Layout for TinySwitch-III with Undervoltage Lock Out Resistor. the BP/M pin solder pad preventing the design from starting up. Designs that make use ...
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TNY274-280 (1,4) Absolute Maximum Ratings 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 ...
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Parameter Symbol Control Functions (cont.) I CH1 BP/M Pin Charge Current I CH2 BP/M Pin Voltage V BP/M BP/M Pin Voltage V Hysteresis BP/MH BP/M Pin Shunt V Voltage SHUNT EN/UV Pin Line Under- I voltage Threshold LUV Circuit Protection ...
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TNY274-280 Parameter Symbol Circuit Protection (cont.) Reduced Current Limit (BP/M Capacitor = I LIMITred 1 μF) See Note D Increased Current Limit (BP/M Capacitor = I LIMITinc 10 μF) See Note D 14 Rev. I 01/09 Conditions SOURCE = 0 ...
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Parameter Symbol Circuit Protection (cont.) 2 Power Coeffi cient I f Initial Current Limit I INIT Leading Edge t Blanking Time LEB Current Limit t Delay ILD Thermal Shutdown T Temperature SD Thermal Shutdown T Hysteresis SDH BP/M Pin Shutdown ...
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TNY274-280 Parameter Symbol Output (cont.) ON-State R Resistance DS(ON) I DSS1 OFF-State Drain Leakage Current I DSS2 Breakdown BV Voltage DSS DRAIN Supply Voltage Auto-Restart t ON-Time OSC Auto-Restart DC Duty Cycle AR 16 Rev. I 01/09 ...
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NOTES accurate estimate of device controller current consumption at no-load, since operating frequency is so low under these S1 conditions. Total device consumption at no-load is the sum Since the output MOSFET is ...
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TNY274-280 BP/M S EN/UV S NOTE: This test circuit is not applicable for current limit or output characteristic measurements. Figure 16. General Test Circuit. Figure 17. Duty Cycle Measurement. 18 Rev. I 01/09 470 Ω ...
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Junction Temperature (°C) Figure 20. Breakdown vs. Temperature. 1.2 1 0.8 0.6 0.4 0 Temperature (°C) Figure 22. Standard Current Limit vs. Temperature. 300 ...
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TNY274-280 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 DRAIN Voltage (V) Figure 26. Drain Capacitance Power. ⊕ .004 (.10) -E- .240 ...
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D S .004 (.10) -E- .240 (6.10) .260 (6.60) Pin 1 .100 (2.54) (BSC) .367 (9.32) -D- .387 (9.83) .125 (3.18) .145 (3.68) .032 (.81) .048 (1.22) .037 (.94) .053 (1.35) Part Ordering Information TNY 278 ...
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TNY274-280 22 Rev. I 01/09 www.powerint.com ...
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Revision Notes D Release fi nal data sheet. E Corrected fi gure numbers and references. Separated current limit and power coeffi cient values for G package and updated Figure 15. Added F EN/UV and PC board leakage currents in Key ...
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... The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www ...