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PT4226N Datasheet(PDF) 2 Page - Texas Instruments |
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PT4226N Datasheet(HTML) 2 Page - Texas Instruments |
2 / 8 page For technical support and more information, see inside back cover or visit www.ti.com PT4220 Series 10-W Low-Profile 48V-Input Isolated DC/DC Converter Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cin =0µF, Cout =0µF, and Io =Iomax) PT4220 SERIES Characteristic Symbol Conditions Min Typ Max Units Output Current Io Over Vin range Vo ≤ 3.3V 0.1 (1) —3 Vo =5.0V 0.1 (1) —2 Vo = 12V 0.1 (1) — 0.85 Input Voltage Range Vin Over Io Range 36.0 48.0 75.0 VDC Set Point Voltage Tolerance Vo tol — ±1±2%Vo Temperature Variation Regtemp –40° ≤Ta ≤ +85°C, Io =Iomin — ±0.2 — %Vo Line Regulation Regline Over Vin range — ±1 — mV Load Regulation Regload Over Io range — ±5 — mV Total Output Voltage Variation ∆Votot Includes set-point, line, load, — ±1.5 ±3 %Vo –40° ≤Ta ≤ +85°C Efficiency η Vo = 12V — 87 — Vo = 5.0V — 85 — Vo = 3.3V — 81 — Vo = 2.5V — 78 — % Vo = 1.8V — 73 — Vo = 1.5V — 71 — Vo = 1.3V — 65 — Vo Ripple (pk-pk) Vr 20MHz bandwidth Vo ≤ 5.0V — 50 — mVpp Vo = 12V — 100 — Transient Response ttr 1A/µs load step, 50% to 100% Iomax — 75 — µs ∆Vtr Vo over/undershoot Vo ≤ 5.0V — ±150 — mV Vo = 12V — ±350 — Output Voltage Adjust Vadj Vo ≥2.5V ±10 — — %Vo Current Limit Threshold Ilim Vin =36V, ∆Vo = –1% — 150 — %Iomax Switching Frequency ƒs Over Vin range 250 300 350 kHz Under-Voltage Lockout UVLO — 32 — V Remote On/Off (Pin 1) Referenced to –Vin (pin 3) Input High Voltage VIH 4.5 — Open (3) V Input Low Voltage VIL –0.2 — +0.8 Input Low Current IIL — –0.5 — mA Standby Input Current Iin standby pins 1 & 3 connected — 1 — mA Internal Input Capacitance Cin — 0.66 — µF External Output Capacitance Cout Vo ≤5.0V 0 (5) — 1000 µF Vo = 12V 0 (5) — 330 Isolation Voltage Input–output/input–case 1500 — — V Capacitance Input to output — 1,100 — pF Resistance Input to output 10 — — M Ω Operating Temperature Range Ta Over Vin range -40 — +85 (4) °C Storage Temperature Ts — -40 — +125 °C Reliability MTBF Per Bellcore TR-332 4.7 — — 106 Hrs 50% stress, Ta =40°C, ground benign Mechanical Shock — Per Mil-Std-883D, method 2002.3, — 500 — G’s 1mS, half-sine, mounted to a fixture Mechanical Vibration — Mil-Std-883D, Method 2007.2 — 20 (6) —G’s 20-2000Hz, all case styles soldered to PC Weight — — — 20 — grams Flammability — Materials meet UL 94V-0 Notes: (1) The DC/DC converter will operate at no load with reduced specifications. (2) The maximum output current reduces the output power of the following devices to less than 10W:- PT4225 =7.5W; PT4221 =5.4W; PT4226 =4.5W; PT4227 =3.9W. (3) The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the converter will operate when input power is applied. The open-circuit voltage is typically 5V. Refer to the application notes for interface considerations. (4) See Safe Operating Area curves or contact the factory for the appropriate derating. (5) An output capacitor is not required for proper operation. (6) 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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