DPA422-426 DPA-Switch Family Highly Integrated DC-DC Converter ICs for Power over Ethernet & Telecom Applications Product Highlights Highly Integrated Solution • Eliminates up to 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 • Thermally efficient TO-263-7C (R package) option for high power applications 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 • Externally programmable current limit • Source connected tab reduces EMI • Line undervoltage (UV) detection: meets ETSI standards • Line overvoltage (OV) shutdown protection • UV/OV limits gate drive voltage for synchronous rectification • Fully integrated soft-start for minimum stress/overshoot • Supports forward or flyback topology • Cycle skipping: regulation to zero load without pre-load • Hysteretic thermal shutdown for automatic fault recovery • RoHS compliant P and G package options VO SENSE CIRCUIT VIN DPA-Switch L D CONTROL RESET/ CLAMP CIRCUIT S C F X PI-2770-032002 Figure 1. Typical Forward Converter Application. Output Power Table 36-75 VDC Input Range (Forward)2 Total Device Dissipation3 0.5 W 1W 2.5 W 4W 6W Max Power Output1 DPA4227,8 7.5 W 10 W - - - 10 W DPA423 12 W 16 W - - - 18 W EcoSmart™ – DPA424 16 W 23 W 35 W - - 35 W • DPA425 23 W 32 W 50 W 62 W - 70 W DPA4265 25 W 35 W 55 W 70 W 83 W 100 W • Energy Efficient Extremely low consumption at no-load Cycle skipping at light load for high standby efficiency Applications • PoE applications, VoIP phones, WLAN, security cameras • Telco central office equipment: xDSL, ISDN, PABX • Distributed power architectures (24 V/48 V bus) • Industrial controls Product4 36-75 VDC Input Range (Flyback)2 Total Device Dissipation3 0.5 W 0.75 W 1W 1.5 W Max Power Output1 6.5 W 9.0 W - - 9.0 W 13 W Product4 DPA4227,8 Description DPA423 9W 13 W - - The DPA-Switch™ IC family is a highly integrated solution for DC-DC conversion applications with 16‑75 VDC input. DPA424 10 W 14.5 W 18 W 24 W 26 W DPA425 -6 -6 -6 25.5 W 52 W DPA-Switch uses the same proven topology as TOPSwitch™, cost effectively integrating a 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. Hysteretic thermal shutdown is also provided. In addition, all critical parameters (i.e. current limit, frequency, PWM gain) have tight temperature and absolute tolerance, to simplify design and reduce system cost. Table 1. Output Power Table. 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 with R package. 4. Packages: P: DIP-8, G: SMD-8, R: TO-263-7C. For lead-free package options, see Part Ordering Information. 5. Available in R package only. 6. Due to higher switching losses, the DPA425 may not deliver additional power compared to a smaller device. 7. Available in P and G package only. 8. DPA422 not recommended for new designs, use DPA423 instead. www.power.com June 2015 This Product is Covered by Patents and/or Pending Patent Applications.



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型式 数量 D/C・lead 備考 選択
DPA424GN 400個    
DPA424GNTL 7426個