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High-efficiency DC/DC Converter 48V Input, 18V to 34VDC Output, 3A Output Suitable for Fan Motor Control Industry Standard Quarter Brick Pinout and Footprint Typical Efficiency: 87% at 3A, 34V Droop Feature Allows Current Sharing Very Low Common-mode Noise for a Commercial DC/DC Converter Two-stage Input Filter Constant Switching Frequency Remote Sense Single Board Design Optional Low Profile Heatsink for Improved Thermal Performance Header with M3 Metal Inserts for Mechanical Connection to PCB Two Year Warranty Compatible with Fan Turn-on Requirements Designed to be Stable with High Capacitance Load Uses Innovative Control and Power Topology for Lower Parts Count Microprocessor Controlled Primary-side Enable, Choice of Logic
DORADO HV
The Dorado HV is also 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: 0.2% Load Regulation: +2% no load; -2% full load* Line Regulation: 0.2% Low Output Ripple Output Trim
ISO 9001 CERTIFIED ORGANISATION
(R)
* Varies with setpoint and trim method.
Dorado HV, Page 1
WWW.GALAXYPWR.COM
Part No. 01-001 Rev. 4.0-051404
General Specifications
VIN = 48VDC, TA@25C, 300 LFM Airflow, VOUT = 34V, IOUT = 1.5A. 68F electrolytic capacitor across output pins. 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 Output Voltage/Trim Range Regulation Over Line, Load & Temperature Voltage Ripple Current Range Current Limit Inception* Turn-on Time to 98%Vnom Output Overshoot at Turn-on Overvoltage Protection Isolation Isolation Test Voltage, Input/Output (Basic) Isolation Resistance Features Overtemperature Protection, Thermal Sensor** Switching Frequency, Fixed
36
48 2 2
75 4
VDC A F VDC VDC %VNOM mV RMS A A mS %VOUT VDC VDC M
17 97 0 3.25
37 2000 10
34 103 30 3 5.5 400 1 39
117 333
C kHz
* Current limit inception is output voltage dependent. See Current Limit Graph on page 5. ** PCB less than 130C
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 35 grams MTBF Telcordia (Bellcore) 1,600,000 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 HV, Page 2
WWW.GALAXYPWR.COM
Part No. 01-001-C Rev. 4.0-051404
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. * 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.
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 1.0 V 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 4.0 V with respect to the -INPUT 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 100 k to +5V.
Undervoltage Lockout
Input Current
Voltage Rising Voltage Falling
30
32
34
36
38
40
Input Voltage (V)
Dorado HV, Page 3
WWW.GALAXYPWR.COM
Part No. 01-001 Rev. 4.0-051404
Application Notes
Output Over Voltage Protection:
The output voltage is monitored by a redundant secondary-side circuit. If the output voltage exceeds the over-voltage specification, the microprocessor will restart every 2 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. Latching is available as an option.
External Output Trimming
Resistor
Trim RTRIM - Sense
Resistor across Trim Pin
Over Current Protection:
Output Voltage (V)
40 35 30 25 20 15 0
(Droop Percentage = 3%)
If overcurrent lasts more than 3 seconds the converter will shut down and try to restart every 10 seconds until the fault is removed. Latching is available as an option.
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 2 seconds. Latching is available as an option.
Vout Nom (0A) Vout Nom (3A)
10
100
1000
Trim Pin to -Sense Resistance (kOhm)
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. A negative sense lead is connected internally.
Safety:
An external input fuse must always be used to meet these safety requirements.
Dorado HV, Page 4
WWW.GALAXYPWR.COM
Part No. 01-001-C Rev. 4.0-051404
Dorado HV Operation
Note: 68F electrolytic capacitor across output pins for all graphs.
Efficiency
92 18
Power Dissipation Vs Line/Load
Power Dissipation (W)
16 14 12 10 8 6 4 2 0 0 0.5 1.0 1.5 2.0 25 . 3.0
90
Efficiency (%)
88 86 84 82 80 78 76 74 0 0.5 1.0 1.5 2.0 2.5 3.0
36V Vin 48V Vin 75V Vin
36V Vin 48V Vin 75V Vin
Output Current (A)
Output Current (A)
Current Limit Vs. Line/Trim Voltage
5.4 5.2
Setpoint Vs Line/Load
35.5 35.0
Current Limit (A)
Output Voltage (V)
5.0 4.8 4.6 4.4 4.2 4.0 3.8 18 20 22 24 26 28 30 32 34
34.5 34.0 33.5 33.0 32.5 0 0.5 1.0 1.5 2.0 25 . 3.0
75V 60V 48V 36V
36V Vin 48V Vin 75V Vin
Trimmed Output Voltage (V)
Output Current (A)
Bode Plot
A T/R (dB) A MAX B MAX B: 50.00 180.0 dB deg MKR GAIN PHASE 10.964.782 4.31822 107.062 Hz mdB deg
A/DIV B/DIV
10.00 dB 36.00 deg
START STOP
100.000 100 000.000
Hz Hz
Voltage Ripple
[
T
T
Startup
]
2
VOUT
1
Ch1 10.0V
Ch2
5.00 V
M 40.0ms A
Ch1
2.70V
Dorado HV, Page 5
WWW.GALAXYPWR.COM
Part No. 01-001 Rev. 4.0-051404
PACKAGE DETAIL
MOUNTING INSERT CONNECTED TO CASE PIN 2.28
Pin
1.030 A A .815 .665 .515 .365 .215 0 BOTTOM VIEW PIN 8 PIN 7 PIN 6 PIN 5 PIN 4
Function
Pin Dia. (in.)
1.030 PIN 1 .815 1.45 PIN 2 .515 PIN 3 .215 0
.210
.210
1.860
MOUNTING INSERT M3 X 0.5 4 PLACES
.070
0
1 2 3 4 5 6 7 8
Notes:
- 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
2.000 PIN TO PIN .20
* Connected to -Output internally.
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 4. "A" = 0.040" dia. Pins 5. "B" = 0.060" dia. Pins
0 .50 (opt. L = .465) .010 0.008 .50 SIDE VIEW
Ordering Information
Standard Model Number Output Voltage Max Current Efficiency Half Load Full Load
Heatsink Part Numbers
Part Number Height Typical Thermal Performance Natural Convection Forced Convection Power Dissipation* Thermal Resistance**
GLDW34V03
34V
3A
87%
89%
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.
Option Codes:
GLDW34V03 P S R -00X -123
Part No. Options: Positive Logic Version Optional Pin Lengths E = 0.18" (0.01") M = 0.145" (0.01") S = 0.12" (0.01") Heatsink Ready Heatsink - 001 = 0.25" - 002 = 0.50" - 003 = 1.00" - 004 = 0.13" Latched OVP and OTP latch immediately, OCP latches after 3 seconds
*@ 60C rise heatsink to ambient
Example Part No: GLDW34V03ER-123
48V Input 34V@3A Output Negative Logic 0.18" Pin Length Heatsink Ready Latched OVP, OTP and OCP.
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 2004 Galaxy Power. Specifications subject to change without notice.
Dorado HV, Page 6
WWW.GALAXYPWR.COM
Part No. 01-001-C Rev. 4.0-051404

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