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DPA424 データシート(PDF) 1 Page - Power Integrations, Inc. |
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DPA424 データシート(HTML) 1 Page - Power Integrations, Inc. |
1 / 36 page Figure 1. Typical Forward Converter Application. Table 1. Notes: 1. Maximum output power is limited by device internal current limit. 2. See Applications Considerations section for complete description of assumptions and for output powers with other input voltage ranges. 3. For device dissipation of 1.5 W or below, use P or G packages. Device dissipation above 1.5 W is possible only with R package. 4. See Part Ordering Information. 5. Due to higher switching losses, the DPA425 may not deliver additional power compared to a smaller device. DPA423-426 DPA-Switch Family Highly Integrated DC-DC Converter ICs for Distributed Power Architectures The following transparent or built-in features are also provided: soft-start, cycle skipping down to zero load and hysteretic thermal shutdown. In addition, all critical parameters (i.e. current limit, frequency, PWM gain) have tight temperature and absolute tolerance, to simplify design and optimize system cost. Product Highlights Highly Integrated Solution • Eliminates 20-50 external components–saves space, cost • Integrates 220 V high frequency MOSFET, PWM control • Lower cost plastic DIP surface mount (G package) and through-hole (P package) options for designs ≤35 W Superior Performance and Flexibility • Eliminates all external current sensing circuitry • Built-in auto-restart for output overload/open loop protection • Pin selectable 300/400 kHz fixed frequency •Wide input (line) voltage range: 16-75 VDC • Source connected tab reduces EMI • Line under-voltage (UV) detection: meets ETSI standards • Line overvoltage (OV) shutdown protection • Low cost synchronous rectification: line UV/OV shut down limits gate drive voltage range from transformer winding • Fully integrated soft-start for minimum stress/overshoot • Externally programmable current limit • Supports forward or flyback topology • Cycle skipping: regulation to zero load without pre-load • Hysteretic thermal shutdown for automatic fault recovery EcoSmart - Energy Efficient • Extremely low consumption at no load • Cycle skipping at light load for high standby efficiency Applications • Telco central office equipment: xDSL, ISDN, PABX, etc. • Distributed power architectures (24 V/48 V bus, etc.) • Digital feature phones, VoIP phones, PoE • Industrial controls (24 V/48 V) Description The DPA-Switch IC family introduces a highly integrated solution for DC-DC conversion applications in the 16-75 VDC input range. DPA-Switch uses the same proven topology as TOPSwitch, cost effectively integrating the high voltage power MOSFET, PWM control, fault protection and other control circuitry onto a single CMOS chip. High performance features are enabled with three user configurable pins. ® January 2004 PRODUCT4 OUTPUT POWER TABLE 12 W 16 W - - - 18 W 16 W 23 W 35 W - - 35 W 23 W 32 W 50 W 62 W - 70 W 25 W 35 W 55 W 70 W 83 W 100 W DPA423 DPA424 DPA425 DPA426 36-75 VDC INPUT RANGE (FORWARD)2,4 Total Device Dissipation3 0.5 W 1 W 2.5 W 4 W 6 W Max Power Output1 PI-2770-032002 D S C DPA-Switch VIN VO F X L CONTROL SENSE CIRCUIT RESET/ CLAMP CIRCUIT ™ PRODUCT4 9 W 13 W - - 13 W 10 W 14.5 W 18 W 24 W 26 W -5 -5 -5 25.5 W 52 W DPA423 DPA424 DPA425 36-75 VDC INPUT RANGE (FLYBACK)2 Total Device3 Dissipation 0.5 W 0.75 W 1 W 1.5 W Max Power Output1 |
同様の部品番号 - DPA424 |
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同様の説明 - DPA424 |
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