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DPA422 Datasheet(PDF) 1 Page - Power Integrations, Inc. |
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DPA422 Datasheet(HTML) 1 Page - Power Integrations, Inc. |
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1 / 36 page  DPA422-426 DPA-Switch Family www.powerint.com December 2007 Highly Integrated DC-DC Converter ICs for Power over Ethernet & Telecom Applications ® Output Power Table 36-75 VDC Input Range (Forward)2 Total Device Dissipation3 Product4 0.5 W 1 W 2.5 W 4 W 6 W Max Power Output1 DPA4227 7.5 W 10 W - - - 10 W DPA423 12 W 16 W - - - 18 W 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 36-75 VDC Input Range (Flyback)2 Total Device Dissipation3 Product4 0.5 W 0.75 W 1 W 1.5 W Max Power Output1 DPA422 6.5 W 9.0 W - - 9.0 W DPA423 9 W 13 W - - 13 W DPA424 10 W 14.5 W 18 W 24 W 26 W DPA425 -6 -6 -6 25.5 W 52 W 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. 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 under-voltage (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 EcoSmart ® – 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 Description The DPA-Switch IC family is a highly integrated solution for DC-DC conversion applications with 16-75 VDC input. 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. • • • • • • • • • • • • • • • • • • • • • • • • Figure 1. Typical Forward Converter Application. PI-2770-032002 D S C DPA-Switch VIN VO F X L CONTROL SENSE CIRCUIT RESET/ CLAMP CIRCUIT |
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