BTCPower
HQ Series
Description
TM
Broadband TelCom Power,
Inc.
Redefining “Current” Limits In Power Conversion
40-50A High Efficiency Quarter Bricks
The HQ series of high current, high efficiency DC/DC
converters offer current levels that exceed all other quarter-
bricks and are comparable to existing quarter-bricks. With a
wide input voltage range of 36-75V they are available with
an output voltage of either 1.5, 1.8, 2.5 or 3.3 Volts. All
models feature an input filter, input undervoltage lockout,
output overvoltage and overtemperature protection, output
current limiting and short circuit protection. The unique open-
frame construction with aluminum heat spreader design
achieves efficient heat transfer with no hot spots. The use of
patented Flat Matrix Transformer technology and other
patent-pending design concepts facilitate maximum power
delivered with the highest efficiency up to 91%. The
converters combine creative design concepts with highly
derated power devices to achieve very high reliability, high
performance and offer a low cost solution to systems
designers that are challenged to maximize power and
minimize board space.
Features
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Delivers up to 50A in Quarter Brick
High efficiency patented topology
Low profile of only 0.48 inch
1.5V, 1.8V,2.5V or 3.3V output modules
100V/100ms Input transient capability
-40°C to +85 °C ambient operation
Meets Basic Insulation requirements of EN60950
UL 1950 recognized, CAN / CSA C22.2 No. 950-95
Certified, and TUV EN60950 ( pending )
Specification Summary
• 40A @ 3.3V, 45A @ 2.5V, 50A @ 1.8V, 50A @ 1.5V
• Tightly output regulation, typical ±1%
• No minimum load required
• Ripple & Noise (20Mhz BW) 100 mV (pk-pk)
• Wide input operating range 36-75V
• On/Off pin and remote sense
• Output adjustment +/-10% range
• 1500V, 10M
input-to-output isolation
• Meets conducted limits of FCC Class B and CEI
IEC61204-3 Class B with external filter
Applications
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Telecommunications
Data Communications
Wireless Communications
Networking Gear
Servers, Switches and Data Storage
Semiconductor Test Equipment
Distributed Power Architecture
• Open frame construction with heat spreader for low
temperature rise
• Output overcurrent and overvoltage protection
• Over Temperature protection
• Input Under voltage protection
• MTBF of 1,600,000 hours @ 50°C ( Bellcore )
Broadband TelCom Power, Inc. –
1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com
PB HQ Rev3 16-1-04
HQ Series
40-50A High Efficiency Quarter Bricks
BTCPower
TM
Product Brief
Part Number and Selection Information
Model
Part Number
Positive Logic
HQ40A-48-3.3
HQ45A-48-2.5
HQ50A-48-1.8
HQ50A-48-1.5
HQ15A-48-12
HQ35A-48-5
Negative Logic
HQ40A-48-3.3N
HQ45A-48-2.5N
HQ50A-48-1.8N
HQ50A-48-1.5N
HQ15A-48-12N
HQ35A-48-5N
Voltage (Volts)
Nominal
48
48
48
48
48
48
Range
36-75
36-75
36-75
36-75
36-75
36-75
Input
Current (A)
No load
0.1
0.1
0.1
0.1
0.1
0.1
Full load
3.2
2.8
2.2
1.8
4.1
4.0
Output
Voltage
(Volts)
3.3
2.5
1.8
1.5
12.0
5.0
Current
(Amps)
40
45
50
50
15
35
Efficiency
75% Load
(%)
89
87
86
85
93
91
Typical at Ta= +25 ºC under nominal line voltage and 75% load conditions, unless noted.
Consult factory for other output voltage configurations and optional accessories such as heatsinks and filters.
Outline Information and Pin-out
Pin Connection
Pin#
Function
1
2
3
4
5
6
7
8
Vin +
On/Off
Vin -
Vout -
Sense -
Trim
Sense +
Vout +
All dimensions are in inches [mm]
Pin 4 and 8 are dia. 0.062 [1.57]
All other pins are all dia. 0.040 [1.02]
Pin material: Brass
Pin finish: Tin/Lead plated
Heat spreader (baseplate) material:
Aluminum
Weight: 39.5g (1.4oz)
Thermal derating for vertical orientation, Vin=54V
Output
Output Current at 40°C (Amps)
Voltage
200 LFM
300 LFM
(Volts)
NoHeatsink With Heatsink No Heatsink With Heatsink
3.3
2.5
1.8
1.5
12.0
5.0
32
35
39
41
8.0
16
40
45
50
50
12
25
35
37
42
46
10.0
21
40
45
50
50
12
25
Output Current at 60°C (Amps)
200 LFM
300 LFM
No Heatsink With Heatsink No Heatsink With Heatsink
28
30
33
37
6.0
13
40
45
50
50
12
25
30
32
38
41
8.0
16
40
45
50
50
12
25
The information and specifications contained in this brief are believed to be accurate and reliable at the time of publication. Specifications are
subject to change without notice. Refer to product specification sheet for performance characteristics and application guidelines.
Broadband TelCom Power, Inc. –
1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com
PB HQ Rev3 16-1-04
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