tp78xx-1 series www.gztoppower.com tel:020-61038836 email:sales@gztoppower.com page 1 of 3 description the tp78xx-1 series has high efficiency, short circuit protection, thermal shutdown, no heat sink required, industry standard pinout.ideal for redialing 78xx linear regulates and are pin compatible. wide input non-isolated regulated single output output characteristics parameter conditions min typ. max. units output voltage accuracy 100% full load, input voltage range 2 3 % line regulation vin=min. to max, at full load 0.5 0.75 load regulation 10% to 100% load 0.5 1.0 ripple & noise 20mhz bandwidth,(refer to figure 3) 25 45 mvp-p short circuit protection continuous, auto-recovery thermal shutdown internal ic junction 150 output current limit 3000 ma switching frequency full load, input voltage range 335 385 435 khz dynamic load stability 100 ma quiescent current vin from min to max and at 0% load 7 10 ma temperature coefficient ?40 ~+85 0.02 %/ max capacitance load 1000 f all specifications typical at ta=25oc, nominal input voltage and rated output current unless otherwise specified. common specifications parameter conditions min. typ. max. units storage humidity range 95 operating temp. range power derating (above 71oc) -40 85 storage temp. range -55 125 storage temp. range temp rise at full load 100 lead temperature 1.5mm from case for 10 seconds 300 cooling free air convection case material plastic (ul94-v0) mtbf 25 mil-hdbk-217f 2000 k hours weight 2.0 g features rohs compliant wide input non-isolated regulated single output efficiency up to 93% short circuit protection, thermal shutdown temperature range: -40 oc ~ +85 oc low ripple noise sip package no heat sink required industry standard pinout selection guide part number input voltage (vdc) output efficiency % nominal range voltage vdc) current ma) vin (min) vin(max) tp781.5-1 12 4.75~18 1.5 1000 78 72 tp781.8-1 12 4.75~18 1.8 1000 82 76 tp782.5-1 12 4.75~18 2.5 1000 87 82 tp783.3-1 12 4.75~20 3.3 1000 90 83 tp785.0-1 12 6.5~20 5.0 1000 93 85 toppower
tp78xx-1 series www.gztoppower.com tel:020-61038836 email:sales@gztoppower.com page 2 of 3 temperature derating graphs external capacitor table part number c1(ceramic capacitor) c2(ceramic capacitor) tp781.5-1 10 f/25v 22 f/6.3v tp781.8-1 10 f/25v 22 f/6.3v tp782.5-1 10 f/25v 22 f/10v tp783.3-1 10 f/25v 22 f/16v tp785.0-1 10 f/25v 22 f/16v standard application circuit note: 1. c1 and c2 are required and should be fitted close to the converter pins. 2. the capacitance of c1,c2 sees external capacitor table, it can be increased properly if required, and tantalum or low esr el ectrolytic capacitors may also suffice. 3. no parallel connection or plug and play. test configurations ta=25 1.efficiency and output voltage ripple test 2.start-up and load transient response test tp78xx-1 25.4 mm 25.4 mm 12.7 mm dc/dc converter 1 2 3 +vin gnd ceramic tantalum scope load 25.4 mm c1 c2 copper strip copper strip +vout 1uf 1uf dc/dc converter 1 2 3 +vin gnd scope load 25.4 mm c1 c2 copper strip 50.8 mm +vout copper strip toppower
tp78xx-1 series www.gztoppower.com tel:020-61038836 email:sales@gztoppower.com page 3 of 3 output ripple reduction to reduce output ripple, it is recommended to add a lc filter in output port. l: recommended parameter 10 h ~ 47 h. mechanical dimensions pin connections sip package hanions pin function 1 +vin 2 gnd 3 +vout recommended footprint details tube outline dimensions bottom view 11.60 0.30 1.80 7.50 5.08 0.50 4.10 1 2 3 10.20 0.50 tp781.5-1 yyww toppower all dimensions in mm 0.25.all pins on a 2.54mm pitch. 0.5 4.7 12.2 9.4 16.7 unless otherwise stated all dimensions in mm 0.5mm. 2.54 2.54 3 1.00 1.15 3 holes unless otherwise stated all dimensions in mm 0.5mm. l=520mm 2mm packaging quantity:43pcs l=220mm 2mm packaging quantity:17pcs toppower
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