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24V or 48V Input, 8.0V, 12.0V DC, 8A Output 15.0V DC, 6A Output Industry's Lowest Cost High-efficiency DC/DC Converter Industry Standard Quarter Brick Pinout and Footprint Typical Efficiency: 86% at 12V, 8A Low Profile Very Low Common-mode Noise for a Commercial DC/DC Converter Constant Switching Frequency Remote Sense Uses Innovative Control and Power Topology for Lower Parts Count Single Board Design Optional Low Profile Heatsink for Improved Thermal Performance Header with M3 Metal Inserts for Mechanical Connection to PCB Two Year Warranty Microprocessor Controlled Primary-side Enable, Choice of Logic Industry Standard Output Trim
DORADO MV
The Dorado MV is available with an optional low profile heatsink for improved thermal performance.
Control Functions
Protection Features
Over Temperature Protection Over Voltage Protection Over Current Protection Over/Under Input Voltage Protection
Typical Characteristics
Output Setpoint Accuracy: 1% Load Regulation: 0.2% Line Regulation: 0.2% Regulation over Line, Load, and Temperature: 2% Low Output Ripple
Dorado MV, Page 1
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702
General Specifications
VIN = 48VDC, TA@25C, 300 LFM Airflow, VOUT = 3.3V, IOUT = 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 Input Capacitance Input Hysteresis, Low Line Output Characteristics Regulation Over Line, Load & Temperature Voltage Ripple Voltage Ripple, 20MHz BW Current Range 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, Non-latching Isolation Isolation Test Voltage, Input/Output (Basic) Isolation Resistance Features Overtemperature Protection, Thermal Sensor, Non-latching* Switching Frequency, Fixed
*PCB less than 130C
36
48 2 2
75 4
VDC A F VDC %VNOM mV RMS mV P-P A %VOUT S mS %VOUT %VOUT %VOUT VDC M
98
102 20 100
0
8 5 400 300 1
60 130 2000 10
110
117 300
C kHz
General Specifications
Operating Temperature Storage Temperature Relative Humidity -40C to +100C -55C to +125C 10% to 95% RH, Non-condensing Vibration 2 to 9Hz, 3mm disp., 9 to 200Hz 1g Material Flammability UL V-0 Weight 30 grams MTBF Telcordia (Bellcore) 2,000,000 hours
Approvals and Standards
UL and c-UL Recognized Component, TUV, UL60950, CSA 22.2 No. 950, IEC/EN 60950** EMC Characteristics: Designed to meet emission and immunity requirements per EN55022, CISPR 22, Class B, and CISPR 24.
** An external fuse shall be used to comply with the requirements.
Dorado MV, Page 2
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702
Application Notes CoolConverterTM
Galaxy's proprietary CoolConverterTM provides: * 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.
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.
Input Current
Overvoltage Lockout
Voltage Rising Voltage Falling
75
76
77
78
79
80
Input Voltage (V)
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. For Positive logic, the ON/OFF pin is brought to greater than 4.0V with respect to the -INPUT pin. To request the Positive logic version, add the suffix (P) to the standard part number. The Enable pin has a built-in pull up resistor of approximately 100k.
Undervoltage Lockout
Input Current
Voltage Rising Voltage Falling
30
32
34
36
38
40
Input Voltage (V)
Dorado MV, Page 3
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702
Application Notes
Output Over Voltage Protection:
The output voltage is constantly monitored by the microprocessor and a redundant secondary-side circuit that is set to a higher trip point than the microprocessor protection. If the output voltage exceeds the overvoltage specification, the microprocessor will restart every 4 seconds and limit voltage with a separate reference circuit. This advanced feature prevents the converter from damaging the load if there is a converter failure or application error.
Trim-down
Thermal Shutdown:
The printed circuit board temperature is measured using a semiconductor sensor. If the maximum rated temperature is exceeded, the converter is turned off. It will then restart every 4 seconds.
Trim-down (%)
RTRIM-DOWN =
{
100 -2 %
}
5.11k
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 1V.
Trim-up (for 3.3V)
Safety:
An external input fuse must always be used to meet safety requirements.
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 following diagrams.
RTRIM-UP =
{
VO(100+%) (100+2%) - 5.11k 1.225% %
}
External Output Trimming
+ Sense
Trim
- Sense
Dorado MV, Page 4
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702
GMDW12V08 Operation
Efficiency
89 87
Power Dissipation
18
Power Dissipation (W)
16 14 12 10 8 6 4 2 0 0 2.0 4.0
Efficiency (%)
85 83 81 79 77 75 0 2.0 4.0 6.0 8.0
36V Vin 48V Vin 75V Vin
36V Vin 48V Vin 75V Vin
6.0 8.0
Output Current (A)
Output Current (A)
Transient Response
[
T
T
Voltage Ripple
]
1
2
Ch1 200mV
Ch2
100mV
M 1.00ms A
Ch2
96.0mV
20.0mV
20.0mV
Start-up
[
T
T
]
1
2
Ch1 5.00V
Ch2
5.00 V
M 20.0ms A
Ch2
2.70V
Dorado MV, Page 5
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702
PACKAGE DETAIL
MOUNTING INSERT CONNECTED TO CASE PIN 1.030 PIN 1 .815 1.45 PIN 2 .515 PIN 3 .215 0 .210 BOTTOM VIEW .210 1.860 .070 0 2.000 PIN TO PIN .20 0 .50 (opt. L = .465) SIDE VIEW .030 .50 A A B A A 2.28
Pin
1.030 .815 .665 .515 .365 .215 0 MOUNTING INSERT M3 X 0.5 4 PLACES PIN 8 PIN 7 PIN 6 PIN 5 PIN 4
Function
Pin Dia. (in.)
1 2 3 4 5 6 7 8
- Input On/Off + Input + Output + Sense Trim - Sense - Output
0.040 0.040 0.040 0.060 0.040 0.040 0.040 0.060
Notes: 1. Mechanical tolerances x.xxx in. = 0.005 in. x.xx in. = 0.01 in. 2. Pin material: brass with tin/lead plating over nickel 3. Workmanship: Meets or exceeds IPC-A-610B Class II
Dorado MV, Page 6
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702
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) GMDW8V08R 8V 8A GMDW12V08R 12V 8A GMDW15V06R 15V 6A Heatsink Part Numbers
Part Number Height
TBD 88 TBD 86
24V Input Models (Designated C) GMDC8V08R 8V 8A GMDC12V08R 12V 8A GMDC15V06R 15V 6A
* Options: P = Positive Logic Version: High = On M = 0.145" Pins (.01") S = 0.12" Pins (.01") R = Heatsink Ready L = Low Profile (0.465" height)
TBD TBD TBD
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
** @ 300'/min.
*@ 60C rise heatsink to ambient
Ordering Information Example Part No:
GMDW12V08R 48V Input 12V@8A Output Negative Logic 0.20" Pin Length Heatsink Ready
Options Code:
GMDW12V08 P S R 00X L Part No. Options: Positive Logic Version Optional Pin Lengths M = 0.145" S = 0.12" Heatsink Ready Heatsink Low Profile
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: galaxy@galaxypwr.com website: http://www.galaxypwr.com
Dorado MV, Page 7
(c) Copyright 2002 Galaxy Power. Specifications subject to change without notice.
PRELIMINARY
Part No. 01-002 Rev. 1.0-110702

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