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TNY375P Datasheet(PDF) 9 Page - Power Integrations, Inc. |
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TNY375P Datasheet(HTML) 9 Page - Power Integrations, Inc. |
9 / 22 page Rev. C 09/12 9 TNY375-380 www.powerint.com Key Application considerations TinySwitch-PK Design Considerations Output Power Table Data sheet maximum output power table (Table 1) represents the maximum practical continuous output power level that can be obtained under the following assumed conditions: 1. The minimum DC input voltage is 100 V or higher for 85 VAC input, or 220 V or higher for 230 VAC input or 115 VAC with a voltage doubler. The value of the input capacitance should be sized to meet these criteria for AC input designs. 2. Efficiency of 75%. 3. Minimum data sheet value of I2f. 4. Transformer primary inductance tolerance of ±10%. 5. Reflected output voltage (V OR) of 135 V. 6. Voltage only output of 12 V with an ultrafast PN rectifier diode. 7. Continuous conduction mode operation with transient K P* value of 0.25. 8. Increased current limit is selected for peak and open frame power columns and standard current limit for adapter columns. 9. The part is board mounted with SOURCE pins soldered to sufficient area of copper and/or a heat sink is used to keep the SOURCE pin temperature at or below 110 °C for P and G package and 100 °C for D packaged devices. 10. Ambient temperature of 50 °C for open frame designs and 40 °C for sealed adapters. *K P. Below a value of 1, K P is the ratio of ripple to peak primary current. A transient K P limit of ≥0.25 is recommended to avoid premature termination of switching cycles due to initial current limit (I INIT) being exceeded, which reduces maximum output power capability. The values shown in Table 1 for peak power assume operation in I LIMITPEAKinc. For reference, Table 2 provides peak output powers for each family member at all three selectable current limit modes. For both Table 1 and Table 2, the peak output power values are limited electronically, based on minimum device I2f. Stated differently, with sufficient heat sinking, these values could be delivered indefinitely, but in most cases this would be impractical. Adapter and open frame power values are thermally limited and represent the practical continuous (or average) output power in two common thermal environments. Over Voltage Protection The output overvoltage protection provided by TinySwitch-PK uses an internal latch that is triggered by a threshold current of approximately 7 mA into the BYPASS pin. In addition to an internal filter, the BYPASS pin capacitor forms an external filter, providing noise immunity from inadvertent triggering. For the bypass capacitor to be effective as a high frequency filter, it Peak Output Power Table Product 230 VAC ± 15% 85-265 VAC I LIMIT- PEAKred I LIMITPEAK I LIMIT- PEAKinc I LIMIT- PEAKred I LIMITPEAK I LIMIT- PEAKinc TNY375P/G/D 8.5 W 14.5 W 16.5 W 5.5 W 11.5 W 12.5 W TNY376P/G/D 10 W 19 W 22 W 6 W 15 W 17 W TNY377P/G 13 W 23 W 28 W 8 W 18 W 23 W TNY378P/G 16 W 27.5 W 34 W 10 W 21.5 W 27 W TNY379P/G 18 W 31.5 W 39 W 12 W 25 W 31 W TNY380P/G 20 W 36 W 45 W 14 W 28 W 35 W Table 2. Peak Output Power Capability vs Current Limit Mode Selection. U1 TNY380P C1 10 µF 400 V C2 22 µF 400 V L1 1 mH R1 1 k Ω R9 3.9 M Ω R5 47 Ω 1/8 W R3 2 k Ω 1/8 W R4 20 Ω R2 390 Ω 1/8 W R6 21 k Ω 1% R10 3.9 M Ω C8 10 nF 1 kV C7 1 µF 50 V C3 1000 µF 16 V C4 1000 µF 16 V C5 220 µF 16 V C6 10 µF 50 V U2 PC817A VR2 1N5251B, 22 V VR1 BZX55B11 11 V, 2% C9 2.2 nF 250 VAC R7 22 Ω 1/2 W F1 3.15 A 185 - 265 VAC +12 V RTN L N D1 1N4007 D2 1N4007 D7 UF4007 D5 SB560 VR3 P6KE170A D6 UF4004 D3 1N4007 D4 1N4007 PI-4674-012009 T1 EFD25 9,10 1 3 6,7,8 5 2 D S EN/UV BP TinySwitch-PK L2 3.3 µH Figure 15. Single 230 VAC Input 20 W Continuous and 45 W Peak Power Supply Using TNY380PN. |
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