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PT4475A Datasheet(PDF) 1 Page - Texas Instruments |
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PT4475A Datasheet(HTML) 1 Page - Texas Instruments |
1 / 6 page For technical support and more information, see inside back cover or visit www.ti.com Features • 18V to 36V Input Range • -40° to +100°C Operating Temp • 1500 VDC Isolation • 88.5% Efficiency • Programmable Output Voltage 6.5V to 17.5V • Remote On/Off • Differential Remote Sense • N+1 Current Sharing • Over-Current Protection • Over-Temperature Protection • Over-Voltage Protection • Solderable Copper Case Description The PT4475 Excalibur™ module combines state-of-the-art power conversion technology with un- paralleled flexibility. Operating off a standard 24V telecom input, the PT4475 provides a full 100W output at load currents up to 8.5A, and over the programmable output voltage range of 6.5V to 17.5V. The PT4475 features high efficiency, ultra-fast transient response, and the capability for true N+1 current sharing. This product also includes output short circuit and over-temperature protection. L O A D PT4475 +V sns +V out -V out -V sns 7 8-13 14-19 20 21 25 22 24 23 VID0 - VID4 +V in –V in 1 2 3 Inhibit C 1 + PROGRAMMING PINS +V OUT +V IN –V IN –V OUT C 2 Standard Application •C1 = Optional 33µF, 100V electrolytic capacitor •C2 = Optional 1µF, 100V ceramic capacitor • Programming pins, VID0–VID4, are shown configured for Vo =12.0V • For normal operation, pin 3 (Inhibit) must be connected to –Vin. • For operation in N+1 configuration, consult the related application note. • Pins 6 & 26 are used for N+1 configurations only. 100-W 8.5-A Programmable Isolated DC/DC Converter PT4475—24V SLTS128A (Revised 9/4/2001) Specifications Characteristics Conditions PT4475 (T a=25 °C unless noted) Symbols (V in= 24V, Vo=12.0V unless noted) Min Typ Max Units Output Current Io Over Vin range (100W max) 0.1 — 8.5 (1) A Current Limit Icl Vin = 18V — 10 — A Current Sharing Single line referenced to –Vsense ——±10 % Input Voltage Range Vin Io = 0 to Iomax 18 24 36 V Output Voltage Tolerance ∆Vo Over Vin range, Io =Iomax Ta =-40 to +100°C case — ±1.0 ±2.0 %Vo Line Regulation Regline Over Vin range @ max Io — ±0.1 ±1.0 %Vo Load Regulation Regload 0 to 100% of Io max — ±0.5 ±1.0 %Vo Vo Ripple/Noise Vn Io =Iomax — 120 150 mVpp Transient Response ttr 50% to 75% Iomax @ 0.1A/µs — N/A — µSec Vo over/undershoot (no ext caps) — 1.0 — %Vo 50% to 100% Iomax @1.0A/µs — 200 — µSec Vo over/undershoot (no ext. caps) — 5 — %Vo Vo Rise Time Votr At turn-on — — 10 mSec Efficiency η Io =5A — 89 — % Switching Frequency ƒo — — 300 — kHz Remote On/Off Off referenced to -Vin +2.5 — +75.0 VDC On -0.5 — +0.8 Over-Voltage Protection OVP Shutdown and latch off — 125 — %Vo Isolation — — 1500 — — VDC Operating Temperature Range Tc Measured at center of case –40 — +100 °C Over-Temperature Shutdown OTP Case temperature - Auto reset — +110 — °C Storage Temperature Ts — -40 — +125 °C Reliability MTBF Per Bellcore TR-332 1.7 — — 10 6 Hrs 50% stress, t =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 — Vertical (Suffix N) — 10 (2) —G’s (Mil-STD-883D, 20-2000Hz) Horizontal (Suffixes A, C) 20 (2) Weight — — — 90 — grams Notes: (1) The maximum output current is limited to 8.5A or 100/VOUT, Whichever is less. (2) Only the case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing. |
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