PT4452—24V 100-W 30-A Programmable Isolated DC/DC Converter SLTS144A (Revised 5/28/2002) Features • 18V to 36V Input Voltage Range • Programmable Output Voltage Range: 1.3V to 3.5V • -40° to +100°C Operating Temp • 1500 VDC Isolation • 89% Efficiency • Remote On/Off • Differential Remote Sense • 60A Output with PT4495 • Over-Current Protection (Shutdown with Auto-Reset) • Over-Temperature Protection • Over-Voltage Protection • Space-Saving Package • Solderable Copper Case • Safety Approvals: UL 60950 CSA 22.2 950 VDE EN60950 Pending Description Ordering Information Pin-Out Information The PT4452 Excalibur™ DC/DC converter module combines state-of-theart power conversion technology with un-paralleled flexibility. Incorporating high efficiency and ultra-fast transient response, these modules provide up to 30A of output current over the programmable voltage range of 1.3V to 3.5V. This represents a full 100W output at 3.3V. The modules include a number of inbuilt features to facilitate system integration. These include output overcurrent shutdown (with auto reset), over-temperature protection, and an inhibit on/off control. A differential remote sense is also provided to compensate for voltage drop between the converter and load. For additional output current, one PT4452 may be operated with up to two PT4495 compatible booster modules. Each PT4495 adds an additional 30A of output current capability. PT4452o = 1.3 to 3.5 Volts PT4495o = 30-A Booster Pin 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) † Function Pin Function 1 +Vin 14 –Vout 2 –Vin 15 –Vout 3 Inhibit 16 –Vout 4 Vr † 17 –Vout 5 Va † 18 –Vout 6 No Connect 19 –Vout 7 (+)Remote Sense 20 (–)Remote Sense 8 +Vout 21 VID0 9 +Vout 22 VID1 10 +Vout 23 VID2 11 +Vout 24 VID3 12 +Vout 25 VID4 13 +Vout 26 DRV † Pins 4, 5, & 26 are used for booster applications. For stand-alone operation, leave open circuit. Standard Application +V IN 1 + C1 2 + V in – V in Inhibit 3 +V OUT 7 + V sns + V out 8-13 PT4452 VID0 - VID4 • Co = Optional 330µF electrolytic capacitor • C1 = Optional 33µF, 100V electrolytic capacitor -V out 1 4 - 1 9 -V sns 21 22 23 24 25 L O A D + Co 20 –V IN –V OUT PROGRAMMING PINS For technical support and more information, see inside back cover or visit www.ti.com • C2 = Optional 1µF, 100V ceramic capacitor • Programming pins, VID0–VID4, are shown configured for Vo =3.3V • For normal operation, pin 3 (Inhibit) must be connected to –Vin. PT4452—24V 100-W 30-A Programmable Isolated DC/DC Converter Programming Information VID3 VID2 VID1 VID0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 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 VID4=1 VID4=0 Vout Vout 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.9V 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V 1.30V 1.35V 1.40V 1.45V 1.50V 1.55V 1.60V 1.65V 1.70V 1.75V 1.80V 1.85V 1.90V 1.95V 2.00V 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) Characteristic Symbol Output Current Input Voltage Range Set Point Voltage Tolerance Temperature Variation Line Regulation Load Regulation Total Output Voltage Variation Io Vin Vo tol Regtemp Regline Regload ∆Votot Efficiency η –40° ≤Tc ≤ +100°C, Io =0 Over Vin range Over Io range Includes set-point, line, load, –40° ≤Tc ≤ +100°C Io =15A Vo Ripple (pk-pk) Vr 20MHz bandwidth Transient Response ttr ∆Vtr Current Limit Threshold Current Share Tolerance Over-Voltage Protection Switching Frequency Under-Voltage Lockout Inhibit (Pin 3) Input High Voltage Input Low Voltage Input Low Current Ilim thld Ishr tol OVP ƒs UVLO 0.1A/µs load step, 50% to 75% Iomax Vo over/undershoot 1A/µs load step, 50% to 100% Iomax Vo over/undershoot Vin =18V, shutdown with auto-restart with PT4495 booster Shutdown and latch off Over Vin range Standby Input Current Internal Input Capacitance External Output Capacitance Isolation Voltage Capacitance Resistance Operating Temperature Range Over-Temperature Shutdown Storage Temperature Reliability VIH VIL IIL Iin standby Cin Cout Tc OTP Ts MTBF Mechanical Shock — Mechanical Vibration — Weight Flammability — — Conditions Over Vin range Over Io Range Vo =3.3V Vo =2.5V Vo =1.5V Vo >2.0V Vo ≤2.0V Referenced to –Vin (pin 2) pins 3 & 2 connected Between +Vo and –Vo Input–output/input–case Input to output Input to output Case temperature, over Vin range Case temperature, auto reset — Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Per Mil-Std-883D, method 2002.3, 1mS, half-sine, mounted to a fixture Mil-Std-883D, Method 2007.2 Horizontal 20-2000Hz, pcb mounted — Materials meet UL 94V-0 Min PT4452 Typ Max Units 0 18 — — — — — 24 ±1 ±0.5 ±0.1 ±0.2 30 36 ±1.5 — ±1 ±1 A VDC %Vo %Vo %Vo %Vo — ±2 ±3 %Vo — — — — — — — — — — — — 270 — 89 87 81 55 45 N/A 1 75 ±5 35 ±10 125 300 17 — — — 75 55 — — — — — — — 350 — 2.5 –0.5 — — — 0 1500 — 10 -40 — -40 — — –0.2 4 3 — — 1100 — — 120 — Open (1) +0.8 — 10 — 10,000 — — — +115 (2) — +125 mA mA µF µF V pF MΩ °C °C °C 1.4 — — 106 Hrs — 500 — G’s — 20 (3) — G’s — 90 — grams % mVpp µs %Vo µs %Vo A % %Vo kHz V V 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. For technical support and more information, see inside back cover or visit www.ti.com Typical Characteristics PT4452—24V 100-W 30-A Programmable Isolated DC/DC Converter PT4452 Performance Characteristics (See Note A) Safe Operating Area, Vin =24V Efficiency vs Output Current (See Note B) Stand Alone, No Heatsink 100 90 90 Efficiency - % 80 3.3V 2.5V 1.5V 70 60 Ambient Temperature (°C) 80 VOUT Airflow 70 500LFM 400LFM 300LFM 200LFM 100LFM Nat conv 60 50 40 30 50 0 5 10 15 20 25 20 30 0 Iout (A) 5 10 15 20 25 Iout (A) Ripple vs Output Current 100 80 Ripple - mV VOUT 60 3.3V 2.5V 1.5V 40 20 0 0 5 10 15 20 25 30 Iout (A) Power Dissipation vs Output Current 20 16 Pd - Watts VIN 12 18.0V 24.0V 36.0V 8 4 0 0 5 10 15 20 25 30 Iout (A) Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures For technical support and more information, see inside back cover or visit www.ti.com 30 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. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. 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