For assistance or to order, call Application Notes Mechanical Outline Product Selector Guide (800) 531-5782 PT4205 Series 3-7 WATT 24V INPUT ISOLATED DC-DC CONVERTER • Wide Input Voltage Range: 18V to 36V • 84% Efficiency • 1,500 VDC Isolation • 18 Pin - DIP Package • 3.5 Million Hour MTBF • Meets FCC/EN55022 Class A • UL and CSA approved • No External Components Required • Adjustable Output Voltage Power Trends’ PT4205 series of isolated DC to DC converters advance the state-of-the-art for boardmounted converters by employing high switching frequencies, thick-film technology and a high degree of silicon integration. The high reliability and very low package height makes these converters ideal for Telecom and Datacom applications requiring inputto-output isolation with board spacing down to 0.6”. The PT4205 series is offered in a unique molded through-hole or SMD-DIP package with single output voltages of 3.3V and 5V. Pin-Out Information Standard Application +Vout -Vout NC Sync Vadj NOR Specifications PT4205 18 17 16 15 14 13 12 11 10 -Vin +Vin NC RC TOA PT4205 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Output Current Io Over Vin range Current Limit Icl Vin = 24V On/Off Standby Current Iin standby Short Circuit Current Isc Inrush Current Iir tir Input Voltage Range Vin Pin Function 1 Vout 2 Vout return 3 Do not connect 4 Do not connect 5 Do not connect 6 Do not connect 7 Sync input Min Typ Max Units Vo = 3.3V Vo = 5V 0 0 — — 1.8 1.2 A A 8* Vadj Vo = 3.3V Vo = 5V 2.0 1.3 — 1.6 3.0 2.4 A A 9* Nominal output voltage resistor Vin = 24V, Pin 11 = -Vin — 0.5 — mA 10 Vin = 24V — — 2.5 2.0 — — A A Turn-on/off input voltage adjust 11 Remote on/off Vin = 24V @ max Io On start-up — — 0.6 1.0 1.0 2.0 A mSec 12 Do not connect Over Io Range 18** 24 36 V 13 Do not connect Do not connect Do not connect Output Voltage Tolerance ∆Vo Over Io Range Idling Voltage Vo Io = 0A Vo = 3.3V Vo = 5V Vo = 3.3V Vo = 5V — ±4 — %Vo 14 — — 3.65 5.6 4.0 6.0 V V 15 — 60 — dB Ripple Rejection RR Over Vin range @ 120 Hz Line Regulation Regline Over Vin range @ max Io — ±0.5 — %Vo Load Regulation Regload 10% to 100% of Io max — ±3 — %Vo Vo Ripple/Noise Vn Vin=24V, Io=Io max — 30 70 mVpp Transient Response ttr 50% load change Vo over/undershoot — — 100 3.0 300 5.0 µSec %Vo Efficiency η Vin=24V, Io=1.8A, Vin=24V, Io=1.2A, — — 79 84 — — % % Switching Frequency ƒo Over Vin and Io 520 — 688 kHz Pin Temperature Tp @ Pin 1 — — +95 °C Operating Temperature Ta Vin = 24V @ max Io Free air convection, (40-60LFM) -40 — +85 °C Storage Temperature Ts — -55 — +125 °C Mechanical Shock — Per Mil-STD-202F, Method 213B, 6mS, half-sine, mounted to a PCB — 50 — G’s Mechanical Vibration — Per Mil-STD-202F, Method 204D, 10-500Hz, mounted to a PCB — 10 — G’s Vo=3.3V Vo=5V Weight — — — 20 — grams Isolation — — 1500 — — VDC Flammability — Materials meet UL 94V-0 ** Minimum input voltage is adjustable - See application note. 60 1 2 3 4 5 6 7 8 9 Revised 5/15/98 16 Do not connect 17 +Vin 18 -Vin * Please note that when the Vout adjust is not used, pin 8 must be connected to pin 9. Ordering Information Through-Hole PT4205A = 3.3V/1.8A PT4206A = 5V/1.2A Surface Mount PT4205C = 3.3V/1.8A PT4206C = 5V/1.2A (For dimensions and PC board layout, see Package Style 900.) Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com CHARACTERISTIC PT4205 Series DATA Efficiency vs Output Current 100 90 90 Vin 80 18.0V 24.0V 70 30.0V Efficiency (%) 100 Vin 80 18.0V 24.0V 70 30.0V 36.0V 60 36.0V 60 50 50 40 40 0 0.3 0.6 0.9 1.2 0 1.5 Output Current (Amps) 0.2 0.4 0.6 0.8 1 1.2 Output Current (Amps) Ripple vs Output Current Ripple vs Output Current 35 18 16 Vin 36.0V 25 30.0V 20 24.0V Ripple (mVpp) 30 Ripple (mVpp) (See Note 1) Vin 36.0V 12 30.0V 10 24.0V 8 18.0V 15 14 18.0V 6 10 4 5 2 0 0 0 0.3 0.6 0.9 1.2 1.5 0 1.8 Output Current (Amps) 0.2 0.4 0.6 0.8 1 1.2 Output Current (Amps) Power Dissipation vs Output Current Power Dissipation vs Output Current 2.5 1.8 Vin 36.0V 1.5 30.0V 24.0V Pd (Watts) Pd (Watts) 1.6 2 1.4 Vin 1.2 1 36.0V 30.0V 0.8 24.0V 18.0V 1 18.0V 0.6 0.4 0.5 0.2 0 0 0 0.3 0.6 0.9 Output Current (Amps) 1.2 1.5 0 0.2 0.4 0.6 0.8 1 1.2 Output Current (Amps) Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the isolated DC-DC converter. Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 61 DATA SHEETS PT4206 5.0 VDC (See Note 1) Efficiency vs Output Current Efficiency (%) (800) 531-5782 24V Bus Products PT4205, 3.3 VDC For assistance or to order, call IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. 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