(800) 531-5782 For assistance or to order, call PT3340 New solate 30W I Revised 5/19/99 Series d SIPs Application Notes Mechanical Outline Product Selector Guide 30 WATT ISOLATED DC/DC CONVERTER The PT3340 is a new series of highinput voltage, 30 Watt, isolated DC to DC converters housed in a unique vertical or horizontal 19-pin SIP package. The 18 to 60V input range allows easy integration into many distributed power applications which utilize 24V bus architectures. The PT3340 series is available with output voltages from 3.3V to 15V. The output voltage is adjustable from 90 to 110% of nominal with the addition of an external resistor. Other easy to use features include an inhibit function and a differential remote sense which automatically compensates for any voltage drop from the converter to the load. The PT3340 includes built in current limit, short circuit protection and overtemperature shutdown. The PT3340 requires a 330µF output capacitor for proper operation. Patent pending* Pin-Out Information Standard Application VO Adjust 18 +VIN +REMOTE SENSE 19 7-9 2 CIN PT3340 + 4-6 Inhibit 13 +VO 14-17 COUT 10-12 + LOAD -VO Q1 -VIN -REMOTE SENSE Cin = Optional 100µF/100V electrolytic C out = Required 330µF electrolytic Q1 = NFET Features Pin Function Pin Function 1 2 Do Not Use Inhibit 10 11 -Vo -Vo 3 4 Do Not Use -Vin 12 13 -Vo -Remote Sense 5 6 -Vin -Vin 14 15 +Vo +Vo 7 8 +Vin +Vin 16 17 +Vo +Vo 9 +Vin 18 19 Vo Adjust +Remote Sense Preliminary Specifications PT3340 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Output Current Io Over Vin range On/Off Standby Current Iin standby Vin = 24V, Pin 1 = -Vin Short Circuit Current Isc Vin = 24V Input Voltage Range Vin Over Io Range Output Voltage Tolerance ∆Vo Over Vin Range TA= -40°C to +85°C Line Regulation Regline Over Vin range @ max Io — ±0.5 — %Vo Load Regulation Regload 10% to 100% of Io max — ±0.5 — %Vo Vo Ripple/Noise Vn Vin=24V, Io=Io max, Vo>5V Vin=24V, Io=Io max, Vo<5V — — 1.0 50 — — %Vo mVpp Transient Response ttr 50% load change, 1A/µSec Vo over/undershoot, Vo>5V — — 100 3.0 — — µSec %Vo Efficiency η Vin=24V, Io=6A, Vo=3.3V Vin=24V, Io=6A, Vo=5V Vin=24V, Io=2.5A, Vo=12V — — — 80 82 86 — — — % % % Switching Frequency ƒo Over Vin and Io 600 400 750 500 900 600 kHz kHz Recommended Operating Temperature Range Ta Vin = 48V @ max Io Airflow = 200 LFM -40* — +85 °C Storage Temperature Ts — -40 — +125 °C Mechanical Shock — Per Mil-Std-883D, method 2002.3, 1mS, half-sine, mounted to a fixture — 500 — G’s Mechanical Vibration — Per Mil-Std-883D, method 2007.2, 20-2000Hz, soldered in a PC board — 10 — G’s Weight — — — 40 — grams Input/Output Isolation Capacitance Resistance — — — — — — 1500 — 10 — 1200 — — — — VDC pF MΩ Flammability — Materials meet UL 94V-0 Vo = 3.3V Vo = 5V Vo = 12V Vo<10V Vo>10V • 30W Output Power • Input Voltage Range: 18V to 60V • 1500 VDC Isolation • Vo Inhibit • Vo Adjust • Differential Remote Sense • Current Limit • Short-Circuit Protection • Over-Temperature Shutdown • Undervoltage Lockout • Flexibile SIP Package • UL 1950, CSA 22.2 950 approval pending • Meets EN60950 Min Typ Max Units 0.25 0.25 0.1 — — — 8.0 6.0 2.5 A A A — 7 14 mA — Iomaxx2 — A Ordering Information 18.0 24.0 60.0 V — ±1.0 — %Vo PT3341¨ PT3342¨ PT3343¨ PT3344¨ = 3.3V/8A = 5.0V/6A = 12.0V/2.5A = 15.0V/2A PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount N A C (For dimensions and PC board layout, see Package Styles 840 and 850.) * Note: This product is the subject of one or more patents. Other patents pending. Inhibit (pin 2) On** 2.5 — 15 VDC Referenced to -Vin Off 0 — 0.8 VDC * At temperatures below 0°C, the PT3340 series requires output capacitors with temperature stable dielectrics such as tantalum or Oscon. ** If pin 2 is left open, the PT3340 will operate when input power is applied. Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com For assistance or to order, call (800) 531-5782 PT3340 CHARACTERISTIC PT3342, 5.0 VDC (See Note 1) Efficiency vs Output Current 100 90 90 Vin 80 18.0V 24.0V 36.0V 48.0V 60.0V 70 60 50 Efficiency vs Output Current 90 Vin 80 18.0V 24.0V 36.0V 48.0V 60.0V 70 60 4 6 8 1 2 Iout (A) Ripple vs Output Current 3 4 5 0.0 6 0.5 1.0 50 60 18.0V 24.0V 36.0V 48.0V 60.0V 30 20 100 Vin 18.0V 24.0V 36.0V 48.0V 60.0V 40 30 0 4 6 18.0V 24.0V 36.0V 48.0V 60.0V 60 40 0 0 8 Vin 80 20 10 0 1 2 Iout (A) 3 4 5 6 0.0 0.5 1.0 Iout (A) Power Dissipation vs Output Current 1.5 2.0 2.5 Iout (A) Power Dissipation vs Output Current 10 2.5 Ripple vs Output Current 20 10 2.0 120 50 Ripple (mV) Vin 40 1.5 Iout (A) Ripple vs Output Current 70 2 60 Iout (A) 60 0 18.0V 24.0V 36.0V 48.0V 60.0V 70 40 0 Ripple (mV) 2 Vin 80 50 40 0 (See Note 1) 100 50 40 Ripple (mV) PT3343, 12.0 VDC (See Note 1) Efficiency vs Output Current 100 Efficiency (%) Efficiency (%) DATA Efficiency (%) PT3341, 3.3 VDC Series Power Dissipation vs Output Current 7 8 6 8 6 4 Vin 18.0V 24.0V 36.0V 48.0V 60.0V 4 5 PD (Watts) 18.0V 24.0V 36.0V 48.0V 60.0V PD (Watts) PD (Watts) Vin 6 18.0V 24.0V 36.0V 48.0V 60.0V 3 2 2 2 Vin 4 1 0 0 0 2 4 6 8 0 0 1 2 Iout (A) 4 5 6 0.0 Safe Operating Area (@Vin=24V) Safe Operating Area (@Vin=24V) Na t co nv 60LFM 60 120LF M 200LF M 50 40 30 4 Iout (A) 6 8 2.0 2.5 Safe Operating Area (@Vin=24V) 80 Airflow 70 Nat conv 60LFM 120LF M 200LF M 60 50 40 30 20 20 1.5 90 Ambient Temperature (°C) Airflow 70 Ambient Temperature (°C) 80 2 1.0 Iout (A) 90 0 0.5 Iout (A) 90 Ambient Temperature (°C) 3 80 70 Airflow Na t co nv 60 60LFM 50 120LF M 200LF M 40 30 20 0 1 2 3 4 5 6 0 0.5 Iout (A) 1 1.5 2 Iout (A) Note 1: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC Converter. Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 2.5 For assistance or to order, call Application Notes (800) 531-5782 PT3320/3340 Series More Application Notes Adjusting the Output Voltage of the PT3320 / PT3340 Series of Isolated DC-DC Converters 3. If the remote sense pins are not being used, the resistors (R1) and R2 can be connected to +Vout or -Vout respectively. The factory pre-set output voltage of Power Trends’ PT3320 and PT3340 series DC-DC converters may be adjusted within a nominal ±10% range. This is accomplished with the addition of a single external resistor. For the input voltage range specified in the data sheet, Table 1 gives the allowable adjustment range for each model as Vo (min) and Vo (max). 4. The adjusted output voltage Va effectively sets the voltage across pins 13 and 19 (±Remote Sense). When using the remote sense pins, Vout (measured directly across pins 10–12, and 14–17) can be significantly higher than Va, and may exceed Vo (max). If Va is adjusted upward, the alternative is to increase the minimum input voltage by the same percentage as Vout exceeds Vo(max). Adjust Up: An increase in the output voltage is obtained by adding a resistor, R2 between pin 18 (Vo adjust), and pin 13 (-Remote Sense). See note 4. The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. Adjust Down: Add a resistor (R1), between pin 18 (Vo adjust) and pin 19 (+Remote Sense). (R1) = Refer to Figure 1 and Table 2 for both the placement and value of the required resistor, (R1) or R2. R2 = Notes: Where 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors to Vo adjust. Any capacitance added to the Vo adjust control pin will affect the stability of the ISR. Ro (Vo – Vr)(Va – Vr) Vr (Vo – Va) Ro (Vo – Vr) (Va – Vo) Vo Va Vr Ro Rs – Rs – Rs kΩ kΩ = Original output voltage = Adjusted output voltage = Reference voltage (Table 1) = Multiplier resistance (Table 1) = Series resistance (Table 1) Table 1 DC-DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # 24V Bus 48V Bus PT3341 PT3321 PT3342 PT3322 PT3343 PT3323 PT3344 PT3324 PT3325 PT3326 Vo(nom) 2.0V 2.5 3.3 5.0 12.0 15.0 Vo(min) 1.8V 2.25 2.95 4.5 10.8 13.5 Vo(max) 2.2 2.75 3.65 5.5 13.2 16.5 Vr Ω) Ro (kΩ 1.225 80.6 1.225 33.2 1.225 33.2 1.225 18.2 2.5 14.3 2.5 11.0 Ω) Rs (kΩ 150.0 121.0 150.0 121.0 90.9 80.6 Figure 1 2 Inhibit +V in 7, 8, 9 +Vin 19 Sns(+) PT3320/3340 -Vin 4, 5, 6 Cin 100 µF 100V (Optional) -V in -Vout Sns(-) 10 - 12 13 +Vout 14 - 17 +V Vo(adj) 18 (R1) Adj Down + Cout 330 µF + L O A D R2 Adj Up -V Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 3 For assistance or to order, call (800) 531-5782 Application PT3320/3340 Series Notes Table 2 PT3320 / PT3340 ADJUSTMENT RESISTOR VALUES Series Pt # 24V Bus 48V Bus Current Vo(nom) Va(req’d) PT3325 8Adc 2.0Vdc PT3326 8Adc 2.5Vdc PT3341 PT3321 8Adc 3.3Vdc Va(req’d PT3343 PT3323 2.5Adc 12.0Vdc 0.0kΩ 4.5 (246.0)kΩ 10.8 (285.0)kΩ 1.85 (62.5)kΩ 4.55 (293.0)kΩ 11.0 (371.0)kΩ 1.9 (194.0)kΩ 4.6 (352.0)kΩ 11.2 (500.0)kΩ 1.95 (589.0)kΩ 4.65 (428.0)kΩ 11.4 (715.0)kΩ 4.7 (529.0)kΩ 11.6 (1150.0)kΩ 2.05 1100.0kΩ 4.75 (670.0)kΩ 11.8 2.1 475.0kΩ 4.8 (882.0)kΩ 12.0 2.15 266.0kΩ 4.85 (1230.0)kΩ 12.2 588.0kΩ 2.2 162.0kΩ 4.9 (1940.0)kΩ 12.4 249.0kΩ 4.95 12.6 136.0kΩ 78.9kΩ 2.25 (20.7)kΩ 2.3 (64.7.0)kΩ 5.0 12.8 2.35 (138.0)kΩ 5.05 13.0 45.0kΩ 2.4 (285.0)kΩ 5.1 566.0kΩ 13.2 22.3kΩ 2.45 (726.0)kΩ 5.15 337.0kΩ 2.5 5.2 PT3344 PT3324 2.0Adc 15.0Vdc Va(req’d) 1.8 2.0 223.0kΩ 13.5 (323.0)kΩ 2.55 726.0kΩ 5.25 154.0kΩ 13.6 (355.0)kΩ 2.6 302.0kΩ 5.3 108.0kΩ 13.8 (437.0)kΩ 2.65 161.0kΩ 5.35 75.3kΩ 14.0 (522.0)kΩ 2.7 90.6kΩ 5.4 50.8kΩ 14.2 (724.0)kΩ 2.75 48.3kΩ 5.45 31.7kΩ 14.4 (1010.0)kΩ 5.5 16.4kΩ 14.6 (1580.0)kΩ 2.95 (127.0)kΩ 3.0 (183.0)kΩ 14.8 3.05 (261.0)kΩ 15.0 3.1 (377.0)kΩ 15.2 607.0kΩ 3.15 (572.0)kΩ 15.4 263.0kΩ 3.2 (961.0)kΩ 15.6 149.0kΩ 3.25 (2130.0)kΩ 15.8 91.3kΩ 16.0 56.9kΩ 16.5 11.1kΩ 3.3 3.35 1230.0kΩ 3.4 539.0kΩ 3.45 309.0kΩ 3.5 194.0kΩ 3.55 126.0kΩ 3.6 79.6kΩ 3.65 R1 = (Red) 4 PT3342 PT3322 6adc 5.0Vdc 46.8kΩ R2 = Black Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 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. 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