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TAURUS Series
48V Input, 1.5V, 1.8V, 2.0V, 2.5V, 3.3VDC, 40A Output or 5.0VDC, 30A Output
The Taurus half brick is the first CoolConverterTM in the Galaxy family of high-efficiency DC/DC converters.
Industry Standard Pinout and Footprint Typical Efficiency: 93% at 3.3V, 20A; 91% at 3.3V, 40A No Heat Sink Required Very Low Common-mode Noise for a Commercial DC/DC Converter Two-stage Input Filter Constant Switching Frequency Remote Sense Single Board Design Optional Baseplate or Low Profile Heatsink for Improved Thermal Performance Header with M3 Metal Inserts for Mechanical Connection to PCB Two Year Warranty
The open-frame Taurus is available with an optional baseplate or low profile heatsink.
Control Functions
Uses Patented Power Supply Control and Architecture Microprocessor Controlled Primary-side Enable, Choice of Logic
Protection Features
Over Temperature Protection Over Voltage Protection Over/Under Input Voltage Protection Over Current Protection
Typical Characteristics
Output Setpoint Accuracy: 1% Load Regulation: 0.25% Line Regulation: 0.25% Regulation over Line, Load, and Temperature: 2% Low Output Ripple Output Trim
Taurus Series, Page 1
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803
General Specifications
VIN = 48V DC, T A @25 C, 300 LFM airflow, V OUT = 3.3V, I OUT = Full Load unless otherwise noted. Available output power depends on ambient temperature and good thermal management. (See application graphs for limits.)
Input Characteristics
Parameter Min Typ Max Units
Operating Input Voltage Input Current (Model Dependent) Input Capacitance Input Hysteresis, Low Line
36
48 4.4 2
75 6.5
V DC A F V DC %V NOM mV RMS mV P-P A A A mV S mS %V OUT %V OUT %V OUT V DC M
Output Characteristics
Regulation Over Line, Load & Temperature Voltage Ripple Voltage Ripple, 20MHz BW Current Range Current Limit Inception Short Circuit Current, Peak (see Note below) Output Transient Response, 50% to 75% load change, 1A/sec Settling Time to 1% Turn-on Time to 98% Vnom Output Overshoot at Turn-on Trim Range Overvoltage Protection, Latching 98 102 15 50 40 48 50 125 300 30 1 110 130 2000 10 117 200
0 41
90
Isolation
Isolation Test Voltage, Input/Output (Basic) Isolation Resistance
Features
Overtemperature Protection, Thermal Sensor, Latching* Switching Frequency, Fixed C kHz
Notes: During short circuit, converter will shut down and attempt to restart once per second. The average current during this condition will be very low and the device can be safely left in this condition continuously. For specific output voltage specifications, see the corresponding detailed data sheet. *PCB less than 130C.
General Specifications
Operating Temperature Storage Temperature Relative Humidity Vibration Material Flammability Weight MTBF Telcordia (Bellcore) -40C to +100C -55C to +125C 10% to 95% RH, Non-condensing 2 to 9Hz, 3mm disp., 9 to 200Hz 1g UL V-0 55 grams 1,600,000 hours
Approvals and Standards
UL and c-UL Recognized Component, TUV, UL60950, CSA 22.2 No. 950, IEC/EN60950** EMC Characteristics: Designed to meet emission and immunity requirements per EN55022, CISPR22, Class B and CISPR24.
** An external fuse shall be used to comply with the requirements.
Taurus Series, Page 2
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803
Application Notes CoolConverterTM Family
Galaxy's COOLCONVERTERTM Family features: * Patented single-stage power conversion architecture, control, and magnetic design allow unprecedented power density and efficiency in an isolated power supply. * An advanced microcontroller reduces parts count while adding features, performance, and flexibility in the design. * Low common-mode noise as a result of lower capacitance in the transformer compared to planar magnetics and metal baseplate designs. * Higher reliability than planar transformer designs that can suffer from via fatigue from thermal cycling, and metal baseplate designs with board to board interconnects that are subject to mechanical stress on electrical connections.
Protection and Control
Valid Input Voltage Range: The converter measures the input voltage and will not allow operation outside of the input voltage specification. As shown by the graphs, hysteresis is added to both the high and low voltage to prevent the converter from turning on and off repeatedly when the voltage is held near either voltage extreme. At low line this assures the maximum input current is not exceeded; at high line this assures the semiconductor devices in the converter are not damaged by excessive voltage stress. ON/OFF Logic Option: The ON/OFF control logic can be either Negative (standard) or Positive to enable the converter. For Negative logic, the ON/OFF pin is brought below 1.0V with respect to the -INPUT pin to enable the converter. The pull-down must be able to sink 100A. For Positive logic, the ON/OFF pin is brought to greater than 4.0V with respect to the -INPUT pin and be limited to less than 10V. To request the Positive logic version, add the suffix (P) to the standard part number. The ON/OFF pin has a built-in pull-up resistor of approximately 100k to +5V.
48Vin: 30 24Vin: 15
32 16
34 17
36 18
38 19
40 20
48Vin: 70 24Vin: 35
72 36
74 37
76 38
78 39
80 40
Taurus Series, Page 3
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803
APPLICATION NOTES
Output Over Voltage Protection: The output voltage is constantly monitored by the microprocessor and a redundant secondary side crowbar circuit that is set to a higher trip point than the microprocessor protection. If the output voltage exceeds the over-voltage specification, the microprocessor will latch the converter off. To turn the converter on requires either cycling the ON/ OFF pin or power to the converter. This advanced feature prevents the converter from damaging the load if there is a converter failure or application error. If non-latching is required, consult factory. Thermal Shutdown: The printed circuit board temperature is measured using a semiconductor sensor. If the maximum rated temperature is exceeded, the converter is latched off. To re-enable the converter requires cycling the ON/OFF pin or power to the converter. If non-latching shutdown is required, consult factory. Control Options: As the behavior of the circuit is determined by firmware in the microcontroller, specific customer requirements such as: * non-latching thermal protection * custom valid input voltage range * controlled delay from initiating an ON/OFF signal for power sequencing can be accomplished with no change to hardware. The standard behavior was chosen based on system design experience but we understand that customers often have their own requirements. Please consult Galaxy Power for your special needs. Remote Sense: The output voltage is regulated at the point where the sense pins connect to the power output pins. Total sense compensation should not exceed 0.4V or 10% of Vout, whichever is greater. Safety: An external input fuse must always be used to meet these safety requirements. RTRIM-DOWN = Trim: To trim the output voltage higher, connect the required trim resistor from the Trim pin to the +Sense pin. To trim the output voltage lower, connect the required trim resistor from the Trim pin to the -Sense pin. See diagram below. Trim-down
Trim-down (%)
{
100 - 2 k %
}
Trim-up (for 3.3V)
Trim-up (%)
RTRIM-UP =
{
Vo (100+%) (100+2%) - 1.225% %
}
k
External Output Trimming
+ Sense
Trim
- Sense
Taurus Series, Page 4
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803
GPTW3V340 OPERATION
Efficiency
100 98 96
Power Dissipation
94 92 90 88 86 84 82 80 0 10 20 30
40
Power Dissipation (W)
Efficiency (%)
36V Vin 48V Vin 75V Vin
36V Vin 48V Vin 75V Vin
Load Current (A)
Load Current (A)
Transient Response
Voltage Ripple
VOUT VOUT
20
IOUT
10
Start-up Waveform
T
Thermal Derating Curves
40
Ch2 +Over 1.212%
35 30 25
Ch2 High 3.26V
2
Ch2 Max 3.30V
Iout (A)
20 300 LFM, Low Profile Heat Sink 15 10 200 LFM, Low Profile Heat Sink 300 LFM, Metal Plate 200 LFM, Metal Plate 300 LFM, Open Frame 200 LFM, Open Frame
1
5 0 0
Ch1 5.00mV
B W
Ch2
1.00 V BW M 4.00ms A
Ch1
2.60V
10
20
30
40
50
60
70
Ambient Air Temperature (deg C)
Taurus Series, Page 5
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803
Package Detail
MOUNTING INSERT CONNECTED TO CASE PIN 2.000 PIN 1 1.700 * PIN 2 1.300 2.40 PIN 3 .700 PIN 4 .300 0 .20 BOTTOM VIEW
0 1.900
2.28 2.000 1.700 PIN 11 B B A A .700 A A B B .500 PIN 6 * .300 PIN 5 0 MOUNTING INSERT M3 X 0 .5 4 PLACES *NON-STANDARD PIN OUT .20 0 PIN 7 1.500 PIN 10 * 1.300 PIN 9 1.000 PIN 8
Pin Configuration --Bottom View
Pin No. Function Pin Dia. (in.)
(CASE)
A
1 2* 3 4 5 6* 7 8 9 10* 11
Notes:
- Input Case Ground Pin On/Off + Input + Output + Output + Sense Trim - Sense - Output - Output
0.040 0.040 0.040 0.040 0.080 0.080 0.040 0.040 0.040 0.080 0.080
.19
.50 SIDE VIEW
.010 .50
1. "A" = 0.040 dia. pins 2. "B" = 0.080 dia. pins 3. Optional pins marked* 4. Mechanical tolerances x.xxx in. = 0.005 in. x.xx in. = 0.01 in. 5. Pin material: brass with tin/lead plating over nickel 6. Workmanship: Meets or exceeds IPC-A-610B Class II
Taurus Series, Page 6
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803
ORDERING INFORMATION
Standard Model Number Output Voltage Max Current Typical Efficiency Half Load Full Load Standard Model Number Output Voltage Max Current Typical Efficiency Half Load Full Load
48V Input Models (Designated W) GPTW5V030* 5.0V 30A GPTW3V340* 3.3V 40A GPTW2V540* 2.5V 40A GPTW2V040* 2.0V 40A GPTW1V840* 1.8V 40A GPTW1V540* 1.5V 40A Heatsink Part Numbers
Part Number Height
92% 93% 91% 90% 89% 88%
90% 91% 88% 86% 84% 83%
24V Input Models (Designated C) GPTC5V030* 5.0V 30A GPTC3V340* 3.3V 40A GPTC2V540* 2.5V 40A GPTC2V040* 2.0V 40A GPTC1V840* 1.8V 40A GPTC1V540* 1.5V 40A
91% 92% 90% 89% 88% 87%
89% 90% 87% 85% 83% 82%
Typical Thermal Performance Natural Convection Forced Convection Power Dissipation Thermal Resistance
001 002 003 004
0.25" 0.50" 1.00" 0.13"
5W 7W 11W TBD
5.8C/W 3.2C/W 2.0C/W TBD
* Options: P = Positive Logic Version; High = On H = Extra Power Pins, Non-standard Pinout E = 0.18" Pins (.01") M = 0.145" Pins (.01") S = 0.12" Pins (.01") RG = Heatsink Ready (incl. Plate + Case Ground Pin), or with heatsink: G00X = Case Ground Pin + Heatsink T = Tuned model** Heatsinks optional, consult factory.
Ordering Information Example Part No.: GPTW3V340
48V input 3.3V @ 40A output Negative Logic 0.20" pin length Open Frame
Options Code: (All options shown) GPTW 3V3 40 P H S R G T 00X
Part Number (from chart above) Options: Positive Logic Version Extra Power Pins Optional Pin Length E = 0.18" M = 0.145" S = 0.12" Heatsink-ready plate (requires G) Case Ground Pin Tuned Model Heatsink (does not require R, must have G) 001 = 0.25" 002 = 0.50" 003 = 1.00" 004 = 0.13"
**T (Tuned Model) Option Designed for higher di/dt and I applications, the transient response has been modified to take advantage of the capacitance on the customer's PCB. This unit requires a minimum load capacitance of 5600F with an impedance magnitude of less than 0.005 at 15kHz. It offers a minimum 3X improvement in the peak response compared to a standard unit.
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.
155 Flanders Road Westborough, MA 01581 508-870-9775 Fax: 508-870-9796 e-mail: info@galaxypwr.com website: http://www.galaxypwr.com
(c) Copyright 2000 Galaxy Power, Inc. Specifications subject to change without notice.
Taurus Series, Page 7
WWW.GALAXYPWR.COM
Part No. 99-001 Rev. 5.0-090803

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