PT4475—24V 100-W 8.5-A Programmable Isolated DC/DC Converter SLTS128A (Revised 9/4/2001) Features Description • • • • • The PT4475 Excalibur™ module combines state-of-the-art power conversion technology with unparalleled 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. • • • • • • • 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 Standard Application + V IN 1 2 + C1 C2 7 +V sns +V out 8-13 +V in – V in Inhibit 3 PT4475 VID0 - VID4 + VO U T • C2 = Optional 1µF, 100V ceramic capacitor L O A D -V out 14-19 -V sns 21 22 23 24 25 20 • C1 = Optional 33µF, 100V electrolytic capacitor – VOUT – V IN PROGRAMMING PINS • 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. Specifications Characteristics (Ta=25°C unless noted) Symbols PT4475 Conditions (Vin=24V, Vo=12.0V unless noted) Min Typ Max Output Current Io Over Vin range (100W max) 0.1 — 8.5 Current Limit Icl Vin = 18V — 10 — A 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, I o =Io max 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 =Io max — 120 150 mVpp Transient Response ttr 50% to 75% Iomax @ 0.1A/µs Vo over/undershoot (no ext caps) — — N/A 1.0 — — µSec %Vo 50% to 100% Iomax @1.0A/µs Vo over/undershoot (no ext. caps) — — 200 5 — — µSec %Vo mSec Current Sharing Units (1) A Vo Rise Time Votr At turn-on — — 10 Efficiency η Io =5A — 89 — % Switching Frequency ƒo — — 300 — kHz Remote On/Off Off On referenced to -Vin +2.5 -0.5 — — +75.0 +0.8 VDC Over-Voltage Protection OVP Shutdown and latch off — 125 — %Vo VDC Isolation — — 1500 — — 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 MTBF Per Bellcore TR-332 50% stress, t =40°C, ground benign 1.7 — — 10 Hrs Mechanical Shock — Per Mil-STD-883D, Method 2002.3, 1mS, Half-sine, mounted to a fixture — 500 — G’s Mechanical Vibration (Mil-STD-883D, 20-2000Hz) — Vertical (Suffix N) Horizontal (Suffixes A, C) — 10 20 — G’s Weight — — — 90 — grams Reliability (2) (2) 6 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. For technical support and more information, see inside back cover or visit www.ti.com PT4475—24V 100-W 8.5-A Programmable Isolated DC/DC Converter Pin-Out Information Pin Programming Information Function Pin Function 1 +V in 14 -Vout 2 -V in 15 -Vout 3 Inhibit 16 -Vout 4 Do not connect 17 -Vout 5 Do not connect 18 -Vout 6 Sync 19 -Vout 7 +V sense 20 -V sense 8 +V out 21 VID0 9 +V out 22 VID1 10 +V out 23 VID2 11 +V out 24 VID3 12 +V out 25 VID4 13 +V out 26 Share VID3 VID2 VID1 VID0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 6.5 6.75 7.0 7.25 7.5 7.75 8.0 8.25 8.5 8.75 9.0 9.25 9.5 9.75 10.0 10.25 PT Series Suffix (PT1234 x ) Case/Pin Configuration Order Suffix Package Code N A C Vertical Horizontal SMD (EKD) (EKA) (EKC) (Reference the applicable package code drawing for the dimensions and PC board layout) C H A R A C T E R I S T I C S PT4475, Vo =15.0V (See Note A) (See Note A) Efficiency vs Output Current Efficiency vs Output Current 95 95 90 90 85 85 VIN Efficiency - % Efficiency - % PT4475H =+6.5V to 17.5V Logic 0 = Pin 20 potential (remote sense gnd) Logic 1 = Open circuit (no pull-up resistors) VID4 may not be changed while the unit is operating. T Y P I C A L PT4475, Vo =12.0V 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 Ordering Information VID4=1 VID4=0 Vout Vout 18.0V 24.0V 30.0V 36.0V 80 75 VIN 18.0V 24.0V 30.0V 36.0V 80 75 70 70 65 65 60 60 0 1 2 3 4 5 6 7 0 8 1 2 3 4 5 6 7 8 Iout (A) Iout (A) Power Dissipation vs Output Current Power Dissipation vs Output Current 18 14 16 12 14 Pd - Watts Pd - Watts 10 VIN 12 36.0V 30.0V 24.0V 18.0V 10 8 VIN 36.0V 30.0V 24.0V 18.0V 8 6 6 4 4 2 2 0 0 0 1 2 3 4 5 6 7 0 8 1 2 3 Safe Operating Area, Vo =12V 5 6 7 Safe Operating Area, Vo =15V (See Note B) 90.0 90.0 80.0 80.0 70.0 Nat conv 100LFM 200LFM 300LFM 400LFM 500LFM 60.0 50.0 40.0 Ambient Temperature (°C) Ambient Temperature (°C) 4 8 Iout (A) Iout (A) (See Note B) Airflow 70.0 500LFM 400LFM 300LFM 200LFM 100LFM Nat conv 60.0 50.0 40.0 30.0 30.0 20.0 20.0 0.0 2.0 4.0 Iout (A) 6.0 8.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Iout (A) Note A: 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. Note B: SOA curves represent operating conditions at which the temperature of the metal case is at or below the maximum specified 100°C For technical support and more information, see inside back cover or visit www.ti.com Package Code EKD Suffix N (Revised 6/30/2000) PACKAGE INFORMATION AND DIMENSIONS For technical support and more information, see inside back cover or visit www.ti.com/powertrends Package Code EKA Suffix A (Revised 1/17/2001) PACKAGE INFORMATION AND DIMENSIONS For technical support and more information, see inside back cover or visit www.ti.com/powertrends Package Code EKC Suffix C (Revised 1/17/2001) PACKAGE INFORMATION AND DIMENSIONS For technical support and more information, see inside back cover or visit www.ti.com/powertrends IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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