PISCES II Series
48V or 24V Input
1.0V, 1.2V, 1.5V, 1.8V, 2.0V, 2.5VDC, 60A Output
3.3V, 45A; 5.0V, 30A Output
The Pisces II Series is the industry's
first 60A quarter brick in Galaxy Power's
CoolConverter™ line of high-efficiency DC/DC
converters.
The open-frame Pisces II is available with an optional
heat-spreading baseplate or low profile heatsink for
use in extremely demanding applications.
Industry Standard Pinout and Footprint
Typical Efficiency:
93% at 2.5V, 30A; 91% at 2.5V, 60A
Very Low Dissipation
No Heat Sink Required
Low Profile, 0.38"
Very Low Common-mode Noise for a
Commercial DC/DC Converter
Two-stage Input Filter
Constant Switching Frequency
Remote Sense, Wide Trim Range
Single Board Design, Very Low Parts Count
Optional Baseplate or Low Profile Heatsink
for Improved Thermal Performance
Header with M3 Metal Inserts for Mechanical
Connection to PCB
Two Year Warranty
Control Functions
Patented Power Supply Control and Architecture
Microprocessor Controlled
Primary-side Enable, Choice of Logic
Protection Features
Over Temperature Protection
Over Voltage Protection
Over Current Protection
Over/Under Input Voltage Protection
Typical Characteristics
ISO 9001 CERTIFIED ORGANISATION
®
Pisces II Series, Page 1
Output Setpoint Accuracy: ±1%
Load Regulation: ±0.2%
Line Regulation: ±0.2%
Regulation over Line, Load, and Temperature: ±2%
Low Output Ripple
Output Trim
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Part No. 02-007 Rev. 3.0–061004
General Specifications
VIN = 48VDC, TA@25°C, 300 LFM Airflow, VOUT=2.5V, IOUT = Full Load unless otherwise noted.
Available output power depends on ambient temperature and good thermal management. (See application graphs for limits.)
Input Characteristics
(24V Input in [brackets])
Parameter
Operating Input Voltage
Min
Typ
Max
Units
36 [18]
48 [24]
75 [36]
VDC
6 [10]
A
Input Current (Model Dependent)
Input Capacitance
4 [9]
µF
Input Hysteresis, Low Line
2 [1]
VDC
Output Characteristics
Regulation Over Line, Load & Temperature
98
102
%VNOM
Voltage Ripple
25
mV RMS
Voltage Ripple, 20MHz BW
85
mV P–P
0
60
A
103
140
%IOUT
Short Circuit Current, Peak (see Note below)
90
A
Output Transient Response, 50% to 75% load change, 1A/µsec
5
%VOUT
Settling Time to ±1%
200
µS
Turn-on Time to 98%Vnom
35
mS
Current Range
Current Limit Inception
Output Overshoot at Turn-on
0
Trim Range
%VOUT
70
Overvoltage Protection, Latching
110
130
%VOUT
%VOUT
Isolation
Isolation Test Voltage, Input/Output (Basic)
2250
VDC
Isolation Test Voltage, Input/Case
2000
VDC
Isolation Test Voltage, Output/Case
500
VDC
Isolation Resistance
10
MΩ
Features
Overtemperature Protection, Thermal Sensor, Latching*
110
Switching Frequency, Fixed
250
°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 130°C
General Specifications
Approvals and Standards
Operating Temperature
-40°C to +100°C
Storage Temperature
-55°C to +125°C
Relative Humidity
Vibration
10% to 95% RH,
Non-condensing
2 to 9Hz, 3mm disp.,
9 to 200Hz 1g
Material Flammability
Weight
MTBF
UL V-0
35 grams
Telcordia (Bellcore)
Pisces II Series, Page 2
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.
1.6 Million Hours
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0–061004
Application Notes
CoolConverter™
Galaxy’s proprietary CoolConverter™ 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 from balanced winding design.
Protection and Control
Undervoltage Lockout
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
Valid Input Voltage Range:
Voltage
Rising
Voltage
Falling
30
32
Pisces II Series, Page 3
36
38
40
Input Voltage (V)
ON/OFF Logic Option:
Overvoltage Lockout
Input Current
The ON/OFF control logic can be either Negative
(standard) or Positive to enable the converter. For
Negative logic, bring the ON/OFF pin to less than 1.0V
with respect to the –INPUT pin to enable the converter.
The pull-down must be able to sink 100µA. For
Positive logic, bring the ON/OFF pin 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
100kΩ to +5V.
34
Voltage
Rising
Voltage
Falling
75
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76
77
78
79
80
Input Voltage (V)
Part No. 02-007 Rev. 3.0–061004
Application Notes
Output Over Voltage Protection:
Trim:
The output voltage is constantly monitored by the
microprocessor with a redundant secondary-side
measurement circuit that both shuts down the duty cycle
and triggers the microprocessor to shut down. 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 nonlatching is required, consult factory.
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. The Trim-down equation applies to all Voltages.
Trim-up for 1.5V and above:
RTRIM-UP =
{
}
Vo (100+∆%) (100+2∆%)
−
5.11kΩ
1.225∆%
∆%
Trim-up
(for 3.3V)
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 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.
Trim-up for less than 1.5V:
RTRIM-UP =
Vo (100+∆%) (100+2∆%)
−
5.11kΩ
0.62∆%
∆%
{
}
Trim-down for all voltages:
RTRIM-DOWN =
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.
{
100
–2
∆%
}
5.11kΩ
Trim-down
Safety:
An external input fuse must always be used to meet
these safety requirements.
External Output Trimming
+ Sense
Trim
Trim-down (%)
– Sense
Pisces II Series, Page 4
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0–061004
Pisces II Operation
Efficiency
Efficiency
2.5V Output
94
94
92
92
90
Efficiency (%)
Efficiency (%)
1.8V Output
88
86
36V Vin
48V Vin
60V Vin
84
82
90
88
86
82
80
0
10
20
40
30
80
60
50
36V Vin
48V Vin
60V Vin
84
0
Output Current (A)
20
10
30
50
60
Output Current (A)
Power Dissipation
Power Dissipation
1.8V Output
2.5V Output
14
16
12
14
Power Dissipation (W)
Power Dissipation (W)
40
10
8
6
36V Vin
48V Vin
60V Vin
4
2
12
10
8
6
36V Vin
48V Vin
60V Vin
4
2
0
0
0
10
20
30
40
50
0
60
20
10
Load Current (A)
30
40
50
60
Load Current (A)
Enable-on Waveform
48V Input, 30A, 1.8V Output
2.5
2.0
1.5
0.5
Vout
0
6
4
Enable
Enable (V)
Vout (V)
1.0
2
0
0
10
20
30
40
50
Time (mS)
Pisces II Series, Page 5
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0–061004
PACKAGE DETAIL
Pin Configuration —Bottom View
2.28
1.030
1.030
1.45
B
PIN 1 .815
A
PIN 2 .515
A
.515 PIN 6
PIN 3 .215
A
.215 PIN 4
0
.210
.815 PIN 8
0
BOTTOM VIEW
MOUNTING INSERT
M3 X 0.5 4 PLACES
.210
0
1.860
.070
2.000
PIN TO PIN
SIDE VIEW
Pisces II Series, Page 6
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:
0.38
0.20
Pin
0.010 ±0.008
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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
Part No. 02-007 Rev. 3.0–061004
ORDERING INFORMATION
Standard Model
Number
Output
Voltage
Max
Current
48V Input Models (Designated W)
G2PW5V030*
5.0V
30A
G2PW3V345*
3.3V
45A
G2PW2V560*
2.5V
60A
G2PW2V060*
2.0V
60A
G2PW1V860*
1.8V
60A
G2PW1V560*
1.5V
60A
G2PW1V260*
1.2V
60A
G2PW1V060*
1.0V
60A
Typical Efficiency
Half Load
Full Load
93%
91%
93%
92%
93%
91%
92%
91%
91%
90%
90%
88%
88%
86%
TBD
G2PW1V860MRT
48V input
1.8V @ 60A output
Negative Logic
0.145" pin length
Heatsink-ready Plate
Tuned Module**
Max
Current
24V Input Models (Designated C)
G2PC5V030*
5.0V
30A
G2PC3V345*
3.3V
45A
G2PC2V560*
2.5V
60A
G2PC2V060*
2.0V
60A
G2PC1V860*
1.8V
60A
G2PC1V560*
1.5V
60A
G2PC1V260*
1.2V
60A
G2PC1V060*
1.0V
60A
Typical Efficiency
Half Load
Full Load
92%
90%
92%
91%
92%
90%
91%
90%
90%
89%
89%
87%
87%
85%
TBD
Pisces II Heatsink Part Numbers
(All options shown)
G2PW 3V345 P S R T 00X
Part Number
(from chart above)
Options:
Positive Logic Version
Optional Pin Lengths
E = 0.18"
M = 0.145"
S = 0.12"
Heatsink-ready
Tuned Model
Heatsink
001 = 0.25"
002 = 0.50"
003 = 1.00"
004 = 0.13"
005 = 0.70"
Output
Voltage
* Options:
P = Positive Logic Version; High = On
E = 0.18" poins (±0.01")
M = 0.145" Pins (±0.01")
S = 0.12" Pins (±0.01")
R = Heatsink Ready
T = Tuned model**
Ordering Information
Example Part No.:
Options Code:
Standard Model
Number
Part
Number
Height†
Typical Thermal Performance
Natural Convection
Forced Convection
Power Dissipation*
Thermal Resistance**
001
0.25"
5W
5.8°C/W
002
0.50"
7W
3.2°C/W
003
1.00"
11W
2.0°C/W
004
0.13"
TBD
TBD
005
0.70"
TBD
TBD
**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 5600µF with
an impedance magnitude of less than 0.005Ω at 15kHz.
It offers a minimum 3X improvement in the peak
response compared to a standard unit. Consult Factory.
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: [email protected]
website: http://www.galaxypwr.com
© Copyright 2002 Galaxy Power. Specifications subject to change without notice.
Pisces II Series, Page 7
WWW.GALAXYPWR.COM
Part No. 02-007 Rev. 3.0–061004