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PT4495 Datasheet(PDF) 2 Page - Texas Instruments |
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PT4495 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 4 page For technical support and more information, see inside back cover or visit www.ti.com PT4452—24V 100-W 30-A Programmable Isolated DC/DC Converter Programming Information VID4=1 VID4=0 VID3 VID2 VID1 VID0 Vout Vout 1 1 1 1 2.0V 1.30V 1 1 1 0 2.1V 1.35V 1 1 0 1 2.2V 1.40V 1 1 0 0 2.3V 1.45V 1 0 1 1 2.4V 1.50V 1 0 1 0 2.5V 1.55V 1 0 0 1 2.6V 1.60V 1 0 0 0 2.7V 1.65V 0 1 1 1 2.8V 1.70V 0 1 1 0 2.9V 1.75V 0 1 0 1 3.0V 1.80V 0 1 0 0 3.1V 1.85V 0 0 1 1 3.2V 1.90V 0 0 1 0 3.3V 1.95V 0 0 0 1 3.4V 2.00V 0 0 0 0 3.5V 2.05V Logic 0 = Connect to (–)Remote Sense, pin 20 Logic 1 = Open circuit (no pull-up resistors) Specifications (Unless otherwise stated, Ta =25°C, Vin =24V, Vo =3.3V, Co =0µF, and Io =Iomax) PT4452 Characteristic Symbol Conditions Min Typ Max Units Output Current Io Over Vin range 0 — 30 A Input Voltage Range Vin Over Io Range 18 24 36 VDC Set Point Voltage Tolerance Vo tol — ±1 ±1.5 %Vo Temperature Variation Regtemp –40° ≤Tc ≤ +100°C, Io =0 — ±0.5 — %Vo Line Regulation Regline Over Vin range — ±0.1 ±1 %Vo Load Regulation Regload Over Io range — ±0.2 ±1 %Vo Total Output Voltage Variation ∆Votot Includes set-point, line, load, — ±2±3%Vo –40° ≤Tc≤ +100°C Efficiency η Io =15A Vo =3.3V — 89 — Vo =2.5V — 87 — % Vo =1.5V — 81 — Vo Ripple (pk-pk) Vr 20MHz bandwidth Vo >2.0V — 55 75 mVpp Vo≤2.0V — 45 55 Transient Response ttr 0.1A/µs load step, 50% to 75% Iomax — N/A — µs ∆Vtr Vo over/undershoot — 1 — %Vo 1A/µs load step, 50% to 100% Iomax — 75 — µs Vo over/undershoot — ±5 — %Vo Current Limit Threshold Ilim thld Vin =18V, shutdown with auto-restart — 35 — A Current Share Tolerance Ishr tol with PT4495 booster — ±10 — % Over-Voltage Protection OVP Shutdown and latch off — 125 — %Vo Switching Frequency ƒs Over Vin range 270 300 350 kHz Under-Voltage Lockout UVLO — 17 — V Inhibit (Pin 3) Referenced to –Vin (pin 2) Input High Voltage VIH 2.5 — Open (1) V Input Low Voltage VIL –0.5 — +0.8 Input Low Current IIL — –0.2 — mA Standby Input Current Iin standby pins 3 & 2 connected — 4 10 mA Internal Input Capacitance Cin —3 —µF External Output Capacitance Cout Between +Vo and –Vo 0 — 10,000 µF Isolation Voltage Input–output/input–case 1500 — — V Capacitance Input to output — 1100 — pF Resistance Input to output 10 — — M Ω Operating Temperature Range Tc Case temperature, over Vin range -40 — +115 (2) °C Over-Temperature Shutdown OTP Case temperature, auto reset — 120 — °C Storage Temperature Ts — -40 — +125 °C Reliability MTBF Per Bellcore TR-332 1.4 — — 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 Horizontal — 20 (3) —G’s 20-2000Hz, pcb mounted Weight — — — 90 — grams Flammability — Materials meet UL 94V-0 Notes: (1) The Inhibit (pin 3) has an internal pull-up, which if left open circuit allows the converter to operate when input power is applied. The open-circuit is limited to 6.5V. Refer to the application notes for interface considerations. (2) See Safe Operating Area curves or contact the factory for the appropriate derating. (3) The case pins on through-hole pin configuration (suffix A) must be soldered. For more information see the applicable package outline drawing. |
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