DC/DC CONVERTERS 240 to 300W Intermediate Bus Converters 1
2 YEAR WARRANTY
NEW Product
All specifications are typical at nominal input, full load at 25°C ambient unless otherwise stated SPECIFICATIONS
File Name: quarter_brick_narrowibc.PDF Rev: 17 Dec 2003
•48V input with isolated 12V output
•Efficiencies up to 96%
•Open loop regulation
•Fully rated 240W @ 70ºC, 200 LFM
•Over-current protection
•Operates with no load
•Auto restart after fault condition
•Remote ON/OFF
•Parallelable
•Over-temperature protection
This series is a new, high efficiency, Quarter-Brick, isolated, Intermediate Bus Converter
series that provides up to 300 Watts of output power. The series is designed to convert
48 Volts ±10% to a loosely regulated 12 Volts at full rated load up to 25A and efficiencies
up to 96%.The 12 Volt power is a great power source for a variety of non-isolated,
point-of-load converters or embedded solutions. This converter is available in four
package types, standard quarter-brick through-hole, through-hole vertical, standard
quarter-brick surface-mount, and quarter-brick surface-mount solder ball. In addition,
this series features remote ON/OFF, no-load operation, input under-voltage protection as
well as output over-voltage and over-current protection.
International Safety Standard Approvals
UL/cUL CAN/CSA 22.2 No. 60950
UL 60950 File No. E139421
TÜV TÜV Product Service (EN60950) Certificate No. B03 04 19870213
Quarter-Brick Series
Narrow Input IBC
TÜV
OUTPUT SPECIFICATIONS
Output voltage 12V
Current share accuracy Full load 10%
Line regulation Low line to high line ±10% max.
Load regulation Full load to min. load 6% max.
Minimum load 0A
Overshoot 3.0% max.
Undershoot 200mV max.
Ripple and noise 5 to 20MHz 150mV pk-pk
(See Note 1)
Transient response Deviation <100mV
(See Note 2) <100µs recovery to
within total error band
Over-voltage setpoint 13.8V
INPUT SPECIFICATIONS
Input voltage range Nominal 48VDC ±10%VDC
Input current No load 100mA typ.
Remote OFF 2mA typ.
Input reflected ripple (See Note 3) 34mA rms
100mA pk-pk
Remote ON/OFF ON >1.7VDC
OFF <0.8VDC
Under-voltage lockout Power up 41.0V
Power down 38.6V
Start-up time Power up <50ms
(See Note 4) Power down <20ms
EMC CHARACTERISTICS
Conducted emissions EN55022 (See Note 5) Level A
EN55022 (See Note 5) Level B
Immunity:
ESD air EN61000-4-2 4kV
ESD contact EN61000-4-2 4kV
Radiated field enclosure EN61000-4-3 3V/m
Conducted (DC power) EN61000-4-6 3V
Conducted (signal) EN61000-4-6 3V
GENERAL SPECIFICATIONS
Efficiency Half load Up to 96% typ.
Insulation Input/output 2000VDC
Switching frequency Fixed 300kHz typ.
Approvals and EN60950 (TÜV Product Service)
standards (See Note 6) UL/cUL60950
Material flammability UL94V-0
Weight 56.66g (2oz)
MTBF MIL-HDBK-217F 1,000,000 hours
Representative model: 25A @ 48Vin, 40°C ambient
100% load ground benign
Telcordia SR-332 2,828,160 hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating ambient, 0°C to +80°C
(300LFM airflow) temperature
Non-operating -55°C to +125°C
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC/DC CONVERTERS 240 to 300W Intermediate Bus Converters 2
NEW Product
File Name: quarter_brick_narrowibc.PDF Rev: 17 Dec 2003
TQN25A48S12-RSB
Part Number System with Options
Nominal Input Voltage
48 = 48 Volts
Number of Outputs
S = Single Output
Nominal Output Voltage
12 = 12 Volts
Mounting Options
No Suffix = Through Hole Horizontal
V = Through Hole Vertical (8)
S = Surface Mount Standard (8)
SB = Surface Mount Solder Ball (8)
RATED INPUT OUTPUT INPUT OUTPUT OVER EFFICIENCY MODEL
OUTPUT VOLTAGE VOLTAGE CURRENT CURRENT CURRENT HALF/FULL LOAD NUMBER
POWER (MAX) (MAX.) SETPOINT
240W 43.2V to 52.8V 12V 6A 20A 25A 96%/95% (typ.) TQN20A48S12
300W 43.2V to 52.8V 12V 7A 25A 29A 96%/95% (typ.) TQN25A48S12
Type of Input Voltage Range
N= Narrow (±10%)
Output Current
20A = 20 Amps
25A = 25 Amps
Package
Q - Standard Quarter-Brick
Product Family
T = Intermediate Bus Converter
Notes
1Measured as per recommended set-up. See Application Note 140 for
details.
2di/dt = 10A/µs, Vin = 48VDC, Tc = 25ºC, load change = 50% lo max. to
75% lo max. and 75% lo max. to 50% lo max.
3Measured with external filter. See Application Note 140 for details.
4Start-up into resistive load.
5The Quarter-Brick Narrow Input series of converters meet levels A and B
conducted emissions with external components. See Application Note
140 for details.
6This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
7Use of additional high quality ceramic output capacitors is recommended
in the end system.
8Consult factory for availability.
PROTECTION
Short-circuit protection Continuous foldback
Over-temperature Auto restart
RECOMMENDED SYSTEM CAPACITANCE
Input capacitance 390µF/20mΩ ESR max.
Output capacitance (See Note 7) 270µF/10mΩ ESR max.
Quarter-Brick Series
Narrow Input IBC
Remote ON/OFF Logic
No Suffix = Positive
Suffix ‘R’ = Negative
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC/DC CONVERTERS 240 to 300W Intermediate Bus Converters 3
NEW Product
File Name: quarter_brick_narrowibc.PDF Rev: 17 Dec 2003
All dimensions in inches (mm)
All tolerance ±0.010in (±0.25mm)
unless otherwise stated
1.450
(36.80)
2.280
(57.90)
Pin 4 Pin 3
Pin 1
Pin 5 2.000
(50.80)
0.600
(15.24)
0.140
(3.60)
0.300
(7.62)
0.600
(15.24)
0.420
(10.70)
0.430
(10.92)
0.200
(5.10)
0.180
(4.57)
0.110
(2.79) PCB Ref
0.030
(0.76) Max.
0.062 ±0.002
(1.57 ±0.05)
2 X 0.040 ±0.002
(1.02 ±0.05)
3 X
Figure 1: Horizontal Mechanical Drawing and Pinout Table
Quarter-Brick Series
Narrow Input IBC
Data Sheet © Artesyn Technologies
®
2003
The information and specifications contained in this data sheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising
from printing errors or inaccuracies. The information and specifications contained or described herein are subject to change in any manner at any time without notice. No rights under any patent
accompany the sale of any such product(s) or information contained herein.
Please consult our website for the following items: ✔ Application Note ✔ Longform Data Sheet www.artesyn.com
PIN CONNECTIONS
PIN NUMBER FUNCTION
1+Vin
2Remote ON/OFF
3-Vin
4-Vout
5+Vout
