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PT3401C Datasheet(PDF) 2 Page - Texas Instruments |
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PT3401C Datasheet(HTML) 2 Page - Texas Instruments |
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2 / 13 page  For technical support and more information, see inside back cover or visit www.ti.com PT3400 Series 35-W 48-V Input Isolated DC/DC Converter SLTS164B - JULY 2002 - REVISED OCTOBER 2002 Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cin =0µF, Io =Iomax, and Cout as required) PT3400 Series Characteristic Symbol Conditions Min Typ Max Units Output Current Io Over Vin range Vo ≤ 1.5V 0 — 16 Vo = 1.8V/2.5V 0 — 12 A Vo =3.3V 0 — 10 Vo = 5V 0 — 7 Input Voltage Range Vin Over Io Range 36 48 75 VDC Set Point Voltage Tolerance Vo tol — ±1±2%Vo Temperature Variation Regtemp –40° ≤Ta ≤ +85°C, Io =Iomin — ±0.8 — %Vo Line Regulation Regline Over Vin range Vo = 5.0V — ±5 ±20 mV Vo ≤ 3.3V — ±5 ±15 mV Load Regulation Regload Over Io range Vo = 5.0V — ±1 ±15 (1) mV Vo ≤ 3.3V — ±1 ±10 (1) mV Total Output Voltage Variation ∆Votot Includes set-point, line, load, — ±2±3%Vo –40° ≤Ta ≤ +85°C Efficiency η Io =70% of Iomax Vo = 5V — 91 — Vo = 3.3V — 90 — Vo = 2.5V — 89 — Vo = 1.8V — 85 — % Vo = 1.5V — 84 — Vo = 1.4V — 84 — Vo = 1.2V — 82 — Vo = 1V — 80 — Vo Ripple (pk-pk) Vr 20MHz bandwidth Vo ≥3.3V — 50 — mVpp Vo ≤ 2.5V — 25 — Transient Response ttr 0.1A/µs load step, 50% to 75% Iomax — 100 — µs ∆Vtr Vo over/undershoot — ±4 — %Vo Output Adjust Vadj Vo ≥ 2.5V –5 — +5 %Vo Vo ≤ 1.8V –0 — +10 Over-Current Threshold ITRIP Vin =36V Vo = 5.0V — 9 — Vo = 3.3V — 12.5 — Vo = 2.5V/1.8V — 16 — A Vo ≤ 1.5V — 20 — Switching Frequencyƒs Over Vin range 250 300 350 kHz Under-Voltage Lockout UVLO Rising — 34 — V Falling — 32 — Enable On/Off (Pins 1, 2) Referenced to –Vin (pin 3) Input High Voltage VIH 5 — Open (2) V Input Low Voltage VIL –0.3 — +0.4 Input Low Current IIL — 0.5 — mA Standby Input Current Iin standbypins 1 & 3 connected — 5 — mA Internal Input Capacitance Cin — 1.0 — µF External Output Capacitance Cout Vo=1.0V 470 (3) — TBD Vo≤1.8V 330 (3) — TBD µF Vo≥2.5V 0 — TBD Isolation Voltage Input–output/input–case 1500 — — V Capacitance Input to output — 1500 — pF Resistance Input to output 10 — — M Ω Operating Temperature Range Ta Over Vin range –40 (4) — 85 (5) °C Solder Reflow Temperature Treflow Surface temperature of module pins or case — — 215 (6) °C Storage Temperature Ts — –40 — 125 °C ReliabilityMTBF Per Bellcore TR-332 2.8 — — 106 Hrs 50% stress, Ta =40°C, ground benign Mechanical Shock — Per Mil-Std-883D, method 2002.3, — TBD — G’s 1mS, half-sine, mounted to a fixture Mechanical Vibration — Mil-Std-883D, Method 2007.2, Vertical — TBD (7) — G’s 20-2000Hz, PCB mounted Horizontal — TBD (7) — Weight — — — 34 — grams Flammability— Materials meet UL 94V-0 Notes: (1) If the remote sense feature is not being used, –Vsense (pin 7) must be connected to –Vout (pin 8). (2) The On/Off Enable inputs (pins 1 & 2) have internal pull-ups. They may either be connected to –Vin or left open circuit. Leaving pin 1 open-circuit and connecting pin 2 to –Vin allows the the converter to operate when input power is applied. The maximum open-circuit voltage of the Enable pins is 10V. (3) An output capacitor is required for proper operation for all models in which the output voltage is 1.8VDC or less. For models with an output voltage of 2.5V or higher an output capacitor is optional. (4) For operation below 0°C, Cout must have stable characteristics. Use low ESR tantalum capacitors, or capacitors with a polymer type dielectric. (5) See Safe Operating Area curves or contact the factory for the appropriate derating. (6) During reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215°C. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Surface Mount Products,” (SLTA051). (7) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing. |
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