Gemini Series DC/DC Converter Powers ≥600MHz Microprocessors The Gemini Series is a high current three quarter brick DC/DC converter with: 1.5 to 2.5 Volt, 55 Amp Output 3.3 or 5V Input Option No Heat Sinking Required 4 Pin Programmable Output Voltage 87% Efficient: 3.3Vin and 2.5Vout @ 40A 84% Efficient: 5Vin and 2.5Vout @ 55A 137.5 Watts @ 100° Baseplate 33 Watts/cu. inch 2.3" x 3" x 0.6" Fixed Frequency Operation Automatic OVP Tracking to Voltage Trim Current Limiting with Auto–Recovery Power Good Signal Two Year Warranty Control Functions Remote Sense Output Enable Protection Features Over Temperature Protection Over Voltage Protection Over Current Protection Typical Characteristics Output Setpoint Accuracy: ±1% Load & Line Regulation: ±0.5% Total Regulation: ±5% Noise & Ripple: 100 mVp–p Output Trim Gemini Series, Page 1 WWW.GALAXYPWR.COM Part No. 98–004 Rev. 1.0 Specifications General Specifications Operating Temperature 0°C to +45°C (@200LFM) Storage Temperature –20°C to +100°C Relative Humidity 10% to 95% RH, Non–condensing Vibration Weight 10–500Hz 0.75g peak 75gm, typical (GPEV6–3V3–40) 200gm, typical (–S, –L) Material Flammability MTBF MIL–HDBK–217 UL94V–0 1.2million hours* * Note: 50% load; 200LFM, 45°C ambient Input Characteristics Operating Air Temperatures from 0°C to +45°C with 200 LFM, D0, D1, D2, D3 pins low state unless otherwise specified. Parameter Name Input Voltage Test Condition Requirement Min Max VI IO = 40A 3.37 3.8 V VI IO = 55A 4.5 5.25 V Var Symbol 3V3–40 –S, –L Unit Input Low Line Power-On V VIon Module Power On – 3.35 V No Load Input Power PIL VI =VInom – 6 W Input Capacitor 3V3–40 20 (330µF) 6600 – µF (external to the converter) –S, –L 12 (330µF) 3900 – µF Input Current 3V3–40 II VI = 3.43V, IO = 40A, VO = 2.5V – 35.2 A –S, –L II VI = 5V, IO = 55A, VO = 2.5V – 35 A Efficiency 3V3–40 N VI = 3.43V, IO = 40A, VO = 2.5V 83 – % (with Local Sense) –S, –L N VI = 5V, IO = 55A, VO = 2.5V 79 – % Reflected Input Ripple 3V3–40 dII VI = 3.43V, IO = 40A, (Note 1) – 6.0 A P–P – 11.0 AP–P CIN = 20 (330µF Tantalum) ESR = 60 mΩ –S, – L dII VI = 5V, IO = 55A, (Note 1) CIN = 12 (330µF Tantalum) ESR = 60 mΩ Switching Frequency FS 250 Typ KHz Note 1: Measure input reflected current which is drawn from input capacitor CIN by converter. Place 3" loop between CIN and VIN of the converter. Gemini Series, Page 2 WWW.GALAXYPWR.COM Part No. 98–004 Rev. 1.0 Specifications Output Characteristics Over the complete baseplate temperatures and input voltage ranges, D0, D1, D2, D3 pins low state unless otherwise specified. Parameter Name Output Voltage Set Point Rated Output Current Line & Load Regulation Noise and Ripple Test Condition Var 3V3–40 –S, –L 3V3–40 –S, –L 3V3–40 –S, –L 3V3–40 Symbol VOnom VOnom IO IO Remote Sense Compensation Round Trip Static Output Overvoltage Protection (Nom) Latching Output Voltage Protection Response Time Current Limit (Nom) – 100 120 mVP–P 2.375 2.500 2.625 V 2.375 2.500 2.625 V – – 100 mV VI = VI nom, IO = 5A 107 – 120 %VO tOVP VI = VI nom, IO = 5A – – 50 µS IL IL ISC ISC VI = 3.43V, VO = 2.5V VI = 5.0V, VO = 2.5V VI = 3.43V, VO < 0.6V VI = 5.0V, VO < 0.6V 42 57 – – – – – – – 110 – – 55 70 125 A A Arms Arms °C Short Circuit Current Over–temperature Shutdown (Tbaseplate) Load Transient Response, VO deviation from steady state (settling time to ±1%) IO = 10–38A @ 28AµS (di/dt) VI = 3.3V(3V3-40) VI = 5.0V(–S, –L) VO = 2.5V pos. or neg. step CO = 28–470µF Cap (470µF, ESR=55mΩ) CIN=12–330µF Cap (330µF, ESR=60mΩ) VI =VImin to VImax, IO=0–40A (See figures on page 5) – – 3 %VO – – 1200 µS Turn–on Time 20 – 120 mS Turn–on Risetime (10–90%) Output Filter Capacitance Voltage Trim 8 330 94.5 – –S, –L 3V3–40 –S, –L 3V3–40 –S, –L Unit 2.500 2.500 – – – – 100 3V3–40 VOPK Notes 1, 2, 3 ton trise Cout Vtrim VI = 3.43V, IO = 20A VI = 5.0V, IO = 30A VO = VOnom VO = VOnom VI = 3.37–3.8V, IO = 0–40A VI = 4.5–5.25V, IO = 0–55A VI = 3.43V, IO = 40A CO = 330µF, 0.47µF VI = 5.0V, IO = 55A CO = 330µF, 0.47µF VI = 3.37–3.8V, IO = 0–40A CO = 20 (470µF) VI = 4.5–5.25V, IO = 0–55A CO = 20 (470µF) VI = VI min, IO = full load Requirement Typ Max 2.475 2.475 0 0 – – – –S, –L Total Regulation (Load, Line, Short term and Long term Dynamic Temp Drift) Min VI =5.0V, IO=IOmax VI =VInom, IO=IOmax/2 VO=2.5V, Short Pin 1 & 10 95.5 2.525 V 2.525 V 40 A 55 A 12.5 mV 12.5 mV 120 mVP–P 30 mS 13,200 µF 96.5 %VOnom Notes: 1. The converter output voltage shall be stable when (13,200µF total) tantalum low ESR filter capacitors are connected across the output of the converter. 2. For 3.43 Input Voltage Rail having IOmax = 40A, the minimum input filter capacitor required is 6600µF (use multiple 330µF tantalum capacitor having 60mΩ ESR.) 3. For 5.00 Input Voltage Rail having IOmax = 55A, the minimum input filter capacitor required is 3960µF (use multiple 330µF tantalum capacitor having 60mΩ ESR.) Gemini Series, Page 3 WWW.GALAXYPWR.COM Part No. 98–004 Rev. 1.0 Specifications Output Voltage Adjustments Control Pin Output Voltage Tolerance ±1.2% D3 D2 D1 D0 Volts DC 1 1 1 1 1.429 1 1 1 0 1.500 1 1 0 1 1.571 1 1 0 0 1.643 1 0 1 1 1.714 1 0 1 0 1.786 1 0 0 1 1.857 1 0 0 0 1.929 0 1 1 1 2.000 0 1 1 0 2.071 0 1 0 1 2.143 0 1 0 0 2.214 0 0 1 1 2.286 0 0 1 0 2.357 0 0 0 1 2.429 0 0 0 0 2.500 Note: the converter shall be tested for four bits logic control. Control Signal Characteristics D0, D1, D2, D3 pins low state unless otherwise specified. Parameter Name Test Condition Symbol Enable_H* Enable_H Source Current Enable_H Voltage Low Enable_H Voltage High Enable_H High (Output Voltage) Powergood_H High Powergood_H Low Fault_H High Fault_H Low Fault_H Source Current Min Requirement Typ Max Unit VI = VInom, IO = 20A VI = VInom, IO = 20A VS – 5.0V, RL = 4K VI = VInom RL = 4K TO –SENSE – – 4.5 2.475 3.3 – 4.0 – 1 – – – 2.500 – – – – – 1.0 0.8 5.2 2.525 – 0.8 5.1 0.8 – mA V V V V V V V mA * Use Open Collector Logic to control Enable function. Gemini Series, Page 4 WWW.GALAXYPWR.COM Part No. 98–004 Rev. 1.0 Application Notes Control Signals Control Signal Characteristics: Per Table on Page 4. Enable_H: This input signal is used to enable the output of the converter when activated (active High). The signal is referenced to either the output side (-Sense) or GND. It has an internal pull-up resistor. To disable the converter requires an open collector logic signal to pull it down. 4 Bit Logic Signals: The state of the 4 bit control signals controls the output voltage. Normally, the 4 bits are in a ‘low state’ and provide for a 2.5V output voltage. The output voltage may be programmed between 1.429 to 2.5V by setting appropriate logic bits ‘high’ through D0, D1, D2, and D3. Powergood_H: The Powergood signal is in a ‘high’ state when the output voltage is within +/- 7.5% of the output voltage programmed by the 4 logic bit inputs. OVPFault_H: This signal is in a ‘high’ state when the output voltage is greater than +/-15% of the output voltage programmed by the 4 bit logic inputs or exceeds the maximum operating temperature of the converter. This output is the open emitter of a transistor which pulls to +5V in the high state and is open in the low state. For driving logic, an appropriate pull down resistor from OVPFault_H to – Sense is required. The OVPFault_H is asserted high when OVPFault is activated. When driving an SCR to ‘crowbar’ the input source from a Fault_H signal, use the circuit below: Trim: The output voltage may be lowered from the nominal programmed value by adding an external resistor from the TRIM pin (J1-10) to – Sense (J1-1). This is used to obtain output voltages between the programmed values. The maximum value the output may be trimmed is approximately –4.5% of Vprog. The resistor value may be calculated from the following formula: (2490) (Vtrim) Rext = ––––––––––––––––––– - 15000 (3.49) (Vprog – Vtrim) Vtrim = Desired output voltage with Rext tied from TRIM pin to – SENSE. Vprog = Nominal programmed output voltage Notes: 1. Vtrim must be less than Vprog. 2. The trim pin does not change the OVP or Powergood_H trip points. These are set by the 4 bit logic inputs Enable Circuit Turn On Time OFF >3V ON ≤0.6V 220K 2N7000 or Equivalent ON/OFF Gate Drive Voltage To (–) Output Load Conditions (Turn On) +5V 2N2222 Fault_H To VENABLE Pin 100Ω 1K C=(20)470µF Tantalum Capacitors 9400µF 20 (330µF) C=6600µF SCR 3.37-5.25V Input 0.µ1F + Output RLOAD=40A Turn On Time Falltime <1µsec 4.5V Gate Drive Voltage 0.8V 10V 10V J1–J10 Trim Pin TURN_ON 2.5V Time Time 0V VO 90% 2.5V Vnom Vnom VOUT VOUT Trise 10% Time Time tOVP 5.0V VO OVPfault_H PowerGood_H J1-J7 PowerGood_H (Volt) Time Gemini Series, Page 5 5.0V J1-J9 OVPfault_H WWW.GALAXYPWR.COM 0 Time Part No. 98–004 Rev. 1.0 Package Detail COnfiguration/Dimensions Pin Assignments Aluminum plate flatness = 0.001 in/in 2.300 Max 0.145 +/-0.02 standoff to power pins P16 0.025 VIN RTN P8 VO RTN 3.025 Max +VO A +VIN control pins A control board control pins P1 P9 9 1 10 2 standoff/insert max dia = 0.225" 0.300 min recommenced clearance area around standoff 0.190 +/-0.020 0.300 min 0.052 max 0.025 airflow direction -S version only Bottom View (facing pins) Side View Notes: 1. GPEV6-3V3-40 only: No heatsink, max height = 0.52" 2. Variations -S, -L only: 0.88" heatsink attached to plate. Max height w/ heatsink =1.4" 3. Components on side 2 shall be 0.030" min. below the standoff. 2.300 Max 1.605 0.595 0.050 Max 2 plcs 0.100 0.025 Max 2 plcs Power Pins 0.150 ctr-ctr PCB control board Power Pins 0.200 ctr-ctr 3.025 Max 2. 812 2.737 P1 P9 2.000 ctr-ctr 2.025 Power Pins (60 mils) Pin Designation P1 Vin P2 Vin P3 Vin P4 Vin P5 Vin RTN P6 Vin RTN P7 Vin RTN P8 Vin RTN P9 Vo P10 Vo P11 Vo P12 Vo P13 Vo RTN P14 Vo RTN P15 Vo RTN P16 Vo RTN Signal Pins (25 mils sq.) Pin Designation J1-1 -Sense J1-2 +Sense J1-3 D0 J1-4 D1 J1-5 D2 J1-6 D3 J1-7 PowerGood_H J1-8 Enable_H J1-9 OVPFault_H J1-10 Trim 1.425 control pins 0.150 1 0.100 standoff 0.475 1.450 1.725 2.100 0.162 optional insert Bottom View (facing pins) Notes: Standoff is used for mounting the heatsink on the plate of the converter. Use 4 - 40 screws. Control pins: 0.025 sq pin, 2x 10 pos. Power pins: 0.060 +/- 0.005 diameter Gemini Series, Page 6 WWW.GALAXYPWR.COM Part No. 98–004 Rev. 1.0 PACKAGE DETAIL Heatsink Variations Fins Parallel to Long Side (–L) 2.650 13x 0.88 0.163 1.130 1.250 4x 0.300 2.200 11x 0.196 0.040 0.475 0.120 4x Ø 0.160 0.150 Note: Recommended fin spacing 2.975 Fins Perpendicular to Long Side (–S) 15x 0.050 2x 0.040 0.88 14x 0.171 0.150 0.293 2.975 0.163 2.650 0.120 Note: Recommended fin spacing 2.200 0.120 1.130 0.475 4x Ø 0.160 ORDERING INFORMATION Model Number GPEV6-3V3-40 GPEV6-5V0-55-S* GPEV6-5V0-55-L* Input Voltage Output Voltage Max Current Efficiency (Typ) 3.3–5.25V 4.5–5.25 V 4.5–5.25V 2.5 V 2.5 V 2.5 V 40 A 55 A 55 A 87 % 84% 84% * –S: short heatsink fins (perpendicular to long side) –L: long heatsink fins (parallel to long side) Gemini Series, Page 7 WWW.GALAXYPWR.COM Part No. 98–004 Rev. 1.0 Galaxy Power Inc. warrants to the original purchaser that the products conform to this data sheet and are free from material and workmanship defects for a period of two (2) years from the date of manufacture, if this product is used within specified conditions. Galaxy Power Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such products or information. For additional details on this limited warranty consult the factory. Gemini Series, Page 8 155 Flanders Road Westborough, MA 01581 508–870–9775 Fax: 508–870–9796 e–mail: [email protected] website: http://www.galaxypwr.com WWW.GALAXYPWR.COM © Copyright 2000 Galaxy Power. Specifications subject to change without notice. Part No. 98–004 Rev. 1.0