Product Selector Guide DC-DC Products

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1 Innovation in power conversion 000 p 00 V 7 0 k PoE Interface 0 H A 9,0.9 k 00 k Product elector Guide - Products V V 6 k M 69 k V MAJ 0A 6,7 MMBTAO6 MVAM Q Q U MMBTAO6 eptember 008 k Q 69.8 MMT90 MMBTAO6 00 k Q V V V 7 V 7 0 k Q 0.0 m.. ONTO PA-witch U PAG M k 0

2 eatures & Benefits The PA-witch amily combines a 0 V power MOET with a controller that provides current monitoring, undervoltage and over temperature protection, soft start and other control functions in a single device, saving up to 0 external components in the power supply design. ombining the key switching elements into a single package reduces design complexity and ensures rapid, low-risk development of highly cost-effective power supplies. uperior Performance and lexibility. The PA-witch family supports a range of power requirements in either forward or fl yback topologies and offers a variety of package options to maximize design fl exibility. A IP-8 package is available for low-cost designs, and a thermally effi cient TO-6-7 package ( /Watt) is available for higher power applications. Product Highlights upports fl yback and forward topology Programmable internal current sense eliminates external sense components Built-in auto-restart for output overload/open loop protection ine undervoltage (UV) detection: meets ETI standards ine overvoltage (OV) shutdown protection ully integrated soft-start for minimum stress/overshoot Hysteretic thermal shutdown for over temperature protection and automatic recovery ource connected tab for low EMI Ecomart Energy Efficiency Extremely low consumption at no-load (0 ma typ.) and in remote off ( ma max.) ycle skipping at light load for high standby effi ciency Package Information P and G packages have Pb-free fi nish (00% matte tin), are oh compliant and meet requirements of JEE standard J-T-00 table.. The package is not available in Pb-free fi nish. G-Package P-Package Package 7 Typical Applications PoE applications: VoIP phones, WAN, security cameras Telco central offi ce equipment: x, IN, PAB istributed power architectures ( V/8 V bus) Industrial controls E lighting - Product elector Guide eptember 008

3 Product elector Guide PA PA P or G P or G PAKAGE P: IP-8 G: M-8 : TO-6-7 PA P or G PA P or G PA OUTPUT POWE (W) V / 8 V - Power onversion (Up to 00 W) Output Power Table Total evice issipation POUT 6-7 V Input ange (orward) 0. W W. W W 6 W Max Power Output PA 7 7. W 0 W W PA W 6 W W PA 6 W W W - - W PA W W 0 W 6 W - 70 W PA6 W W W 70 W 8 W 00 W Total evice issipation POUT 6-7 V Input ange (lyback) 0. W 0.7 W W. W Max Power Output PA 7 6. W 9 W W PA 9 W W - - W PA 0 W. W 8 W W 6 W PA W W Notes:. Maximum output power is limited by device internal current limit.. ee Applications onsiderations section of the PA-witch data sheet for complete description of assumptions and for output powers with other input voltage ranges.. or device dissipation of. W or below, use P or G packages. evice dissipation above. W is possible with packages.. Packages: P: IP-8, G: M-8, : TO-6-7. or lead-free package options, see Part Ordering section of the PA-witch data sheet.. Available in package only. 6. ue to higher switching losses, the PA may not deliver additional power compared to a smaller device. 7. Available in P and G package only. Integrated eatures HV-ET ating 0 V oft tart witching requency (khz) Max. uty ycle ( MA ) 00/ 00 ully Integrated urrent ensing Hysteretic Thermal hutdown Power imiting 7% Adjustable urrent imit ine UV etection emote ON/O Ecomart ow tandby/ No-load Power onsumption ynchronizable to ower External lock requency ontrol Method PWM Auto estart ine OV etection emote ON/O - Product elector Guide eptember 008

4 PA-witch in PoE Applications Power over Ethernet (PoE) is a method whereby power is transmitted to Ethernet-connected equipment (VoIP telephones, WAN transmitters, security cameras) from the central switch. Power Integrations has developed circuits for highly cost-effective IEE80.af compliant power supplies. Tested by the University of New Hampshire s Interoperability onsortium (UNH-IO), PI solutions have been shown to work with all available Power ourcing Equipment (PE). The results of the UNH-IO testing are shown on the PI website. Operation: PoE Powered evice (P) fulfi lls three functions to work in conjunction with the sending end PE: detection, classifi cation and undervoltage lockout. etection Phase: The PE checks the P to determine if it is PoE-enabled. uring the detection phase, the PE applies a voltage ramp to the P and looks for a characteristic impedance from the load ( kω). If the signature impedance is detected, the PE moves on to the classifi cation phase. The signature identifi cation voltage is a ramp voltage between. V and. A.9 kω resistor provides the correct signature impedance for detection. lassification Phase: The PE continues to ramp the voltage to the P. Between. V and 0. V, the P must draw a specifi ed current to identify the device class. The classifi cation current describes the amount of power the P will require during normal operation. A table of classifi cation current and operating P power requirements is shown below. lassification Power evels PoE lass 0 Interface with MOET Pass-witch lass Power (Min) Power (Max) lass (Min) I A (Max) 0 0. W.9 W 0 ma ma 0. W.8 W 9 ma ma.8 W 6.9 W 7 ma 0 ma 6.9 W.9 W 6 ma 0 ma eserved eserved 6 ma ma.9 kω/ / W kω /8 W PI Table. lassifi cation Power evels. igure. PoE lass 0 Interface ircuit Using a MOET Pass-witch. Turn-on Phase: The PE continues to ramp the input voltage up to 0 V. When the undervoltage lockout (UVO) circuit is released the P is allowed to power up. A typical undervoltage lockout circuit is shown in the igure above. or additional information see esign Ideas I-70 ( & I-88 ( also eference esign Kits AK-68A and AK-86. PA-witch onstant urrent E river (0 W, 00 ma) V - 00 V 9 7 PA-witch can support long strings of up to 0 Es (assuming V f =.6 V) μh 6 70 p 0 V MAJ00 9 kω 0 V PA-witch U PA ONTO 0 n V 0 μ V 7. kω. kω 0 μ V MAJ 00 0 n 0 V TN PI Product elector Guide eptember 008

5 PA-witch vs. iscrete esign -7 V Input,.9 W lass Programable Power over Ethernet - onverter (see AK-86) T 9,0 Q8 0 mω ONTO PA-witch U PAG 6,7 Q MMBT 906 U P7 NT U MVAIM PI MVAIM MMT90 MMBTAO6 MMBTAO6 MMBTAO6 Ethernet (J-) onnector (,) (,) (,6) (7,8) Integrated urrent ense and urrent imit implified PoE Interface Includes signature resistor Multi class programmable classification circuit Undervoltage lockout function lassification circuit disabled during operation to improve efficiency imple discrete design lower cost than integrated solutions Tight tolerance and temperature compensated No current sense resistor (higher efficiency) No current sense transformer even for highpower designs Programmable using pin resistor aves up to 6 components Integrated tart-up Higher efficiency (no boot strap losses) aves up to components Integrated ine ense Accurate temperature stability Provide UV/OV protection aves up to 0 components 000 p 00 V 7 0 Ω PoE Interface 0 μh A 6.9 kω 00 kω Q Q U6 V6 V kω Q Ω Q6 00 kω V V kω V 7 V 0 kω 70 n MΩ 70 n 7 p V 0 V 69 kω Ω 9. Ω 6 μ 7 k ource onnected Tab Heat sink connected to source reduces EMI (electrically quiet ) educes EMI filter costs Accurate Integrated Oscillator No external components Tight tolerance and temperature stable electable 00/00 khz operation Programable Undervoltge and Overvoltage Inhibit eature elect startup point with IEEE80.af compliant hysterisis characteristic. Also programmable to match legacy requirements elect overvoltage inhibit point 7 0 μ 6. V 8 0 μ 6. V μh, A 9 0 μ 6. V BAV9W 6 V 0 7 Ω kω. kω 00 n V 0 n V 0 kω Integrated Thermal hutdown irectly senses power MOET temperature Hysteretic auto-restarting Wide hysteresis prevents high average temperatures aves up to components Integrated Voltage Mode ontroller >0% duty cycle operation without requiring slope compensation aves up to 0 components 0 6 V J-. V, A J- TN - Product elector Guide eptember 008

6 esign Examples ost-effective 6.6 W,. V lyback - onverter (EP-86) +V IN 6-7 V J- -V IN J- MΩ 7 p 00 V V MAJ 0A 69 kω T PA-witch U PAG ONTO 8.66 kω 9, 0 6, V 00 Ω. Ω μ 0 μ 6 V BAV9, O 8 0 V 6 0 μ 6 V 0 0. μ U P7 6 Ω U AT, OT μh, A 7 0 μ 6 V 7 kω 0. 8 kω 9 0 kω 9 PI V, A J- TN J- W Multi-Output - onverter (I-69) J- 6-7 V + Input Voltage TN J- μh. A 69 kω 8 T 7 6 ONTO. n 0 Ω 0 Ω Q i80 Q V i80 PA-witch U PAP 0JQ060 V U P7NT.0 Ω V MBJ 0 0 n. kω 7 μ BAV9W 7 6 μh A BAV 9W 6.7 μ 0 V 6.7 μ, V V 6.8 V IN8-00 μ V U 0 Ω BAV9W. μ U MAIM Visit for additional design examples. 00 μ 60 Ω 00 n Ω 68 n kω kω 0.0 kω PI V, 0 ma J- 7. V, 0. A J- V,. A J- TN J- 6 - Product elector Guide eptember 008

7 esign Tools eference esign Kits (Ks) Ks include a working prototype power supply, sample devices, unpopulated pcb, data sheet, comprehensive engineering report and other related documentation. AK-A 0 W, - orward onverter AK-68A 6.6 W, lass 0 PoE onverter AK-7A 6 W, - onverter AK W, Multi-lass Programmable PoE Powered evice Power upply esign oftware* With PI Expert uite, you re only mouse clicks away from determining the key components in your next switching power supply design, including the best Power Integrations power I and detailed instructions for building the transformer! It s fast & easy... and best of all, EE! PA-witch Product and esign ollateral* ata heet PA-6 PA-witch amily ata heet Application Note AN- PA-witch - orward onverter esign Guide I- Application: Telecom (6-7 V Input): 0 W, V orward onverter I- Application: Telecom (6-7 V Input): 0 W, V orward onverter (ync. ectifi cation) I-9 Application: Telecom (6-7 V Input): W, 7 V lyback onverter I- Application: Telecom (6-7 V Input): 70 W, V orward onverter I-7 Application: Telecom (6-7 V Input): 6. W,. V orward onverter (ync. ectifi cation) esign Ideas (-page technical ircuit ocument) I-0 Application: Telecom (6-7 V Input): 0 W,. V orward onverter (ync. ectifi cation) I- Application: Telecom (6-7 V Input): W, V lyback onverter I- Application: Telecom (6-7 V Input): 60 W, V orward onverter (ync. ectifi cation) I- Application: Telecom (6-7 V Input): 0 W, V /. V orward onverter (ync. ectifi cation) I-6 Application: Telecom (6-7 V Input): 9. W, ± V lyback onverter I-7 Application: Telecom (6-7 V Input): 60 W, V lyback onverter I-69 Application: VoIP Phone, W, V / 7. V / 0 V orward onverter (ync. ectifi cation) I-70 Application: PoE VoIP Phone, W, V / 7. V / 0 V orward onverter (ync. ectifi cation) I-88 Application: PoE P lyback onverter with Programmable lass * ownloadable from - Product elector Guide eptember 008 7

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