DC/DC CONVERTERS 308W and 350W Half brick 1
NEW Product
File Name: rfb300_350.pdf Rev (01): 16 Sept 2004
2 YEAR WARRANTY
All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
External output capacitance required (See Note 4) SPECIFICATIONS
RFB300/350 series is a high efficiency, enclosed, isolated DC/DC converter series in
an industry standard half brick package that provides up to 350W of output power.
The series delivers very high usable output power for today’s high performance RF
power amplifier and similar applications. The four models in the series feature an
input voltage range of 18 to 36VDC and 36 to 75VDC and an output voltage of 12V
and 28V. The output voltage is adjustable from 7.2V to 13.2V or 16.8V to 29.4V (not
to exceed 308W for the RFB300 and 350W for the RFB350). The series also has a
remote ON/OFF capability. Over current, over voltage and over temperature
protection features are included as standard. Negative logic remote ON/OFF and
other options are also available. Full international safety approval including
EN/IEC60950 VDE and UL/cUL60950 reduces compliance costs and time to market.
•High efficiency topology
•Wide temperature range, -40°C to +100°C @ full power
•High power density (160W/in3in 0.4” tall version)
•Input voltage range: 18V to 36V or 36V to 75V
•Output voltage range: 7.2V to 13.2V or 16.8V to 29.4V
•Remote ON/OFF
•Operational insulation system
RFB300/350 Series
24Vin and 48Vin single output
ABSOLUTE MAXIMUM RATINGS
Input voltage - peak 24Vin -0.5V to 50V
(100ms max., 48Vin -0.5V to 100V
1% duty cycle max.)
Input voltage continuous 24Vin -0.5V to 40V
48Vin -0.5V to 80V
Adjust pin voltage (with -0.5V to 12V
respect to -sense pin)
OUTPUT SPECIFICATIONS
Voltage adjustability 12V 7.2V to 13.2V
28V 16.8V to 29.4V
Min./max. load 12V 0/29.2A
28V 0/11A, 0/12.5A
Output load capacitance 12V 470µF to 4,700µF
(See Note 10) 28V 330µF to 3,300µF
Rise time (See Note 12) 5ms typ.
INPUT SPECIFICATIONS
Input current 24Vin 23.3A max. @ lo max.
(See Note 3) 48Vin RFB300 11.2A max. @ lo max.
48Vin RFB350 13.0A max. @ lo max.
Input reflected ripple 24Vin 12mA (pk-pk)
(See Note 4) 48Vin 12V model 42mA (pk-pk)
48Vin 28V model 28mA (pk-pk)
Input capacitance - 24Vin 30µF
Internal filter 48Vin 6.6µF
Inrush current 2A2sec.
(See Note 11)
International Safety Standard Approvals
VDE0805/EN60950/IEC950 File No. 10401-3336-0198
Licence No. 40005395
UL/cUL CAN/CSA 22.2 No. 60950
UL 60950 File No. E135734
EMC CHARACTERISTICS
Conducted emissions EN55022 See Application Note 167
Radiated emissions EN55022 See Application Note 167
GENERAL SPECIFICATIONS
Efficiency 24Vin 90%
Vin=Vin(nom), Iout (max.) 48Vin 12V model 88%
48Vin 28V model 91%
Approvals and VDE IEC60950,
standards IECEE CB, UL/cUL60950
Material Flammability UL94V-0
Weight 0.5” tall version 110g (3.88 oz.)
MTBF @ 55ºC Telcordia SR-332, 2,000,000 hours
Issue 1
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating baseplate, -40ºC to +100ºC
temperature
Non-operating -40ºC to +100ºC
RC PIN ELECTRICAL INTERFACE
Open collector compatible (See AN 167 for remote ON/OFF)
RC:
ON voltage (See Note 13) 5.0V min.
Open circuit voltage
5V min, 11V typ, 13V max.
High level leakage current (See Note 14) -25.0µA max.
OFF voltage (See Note 15) 1.2V max.
Low level input current (See Note 16) -250µA max.
File Name: rfb300_350.pdf Rev (01): 16 Sept 2004
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC/DC CONVERTERS 308W and 350W Half brick 2
NEW Product
RFB300-24S28-R5T
Part Number System with Options
Product Family
RFB = Half-Brick
Rated Output Current
300 = 308W
350 = 350W
Output Voltage
12 = 7.2 to 13.2V
28 = 16.8 to 29.4V
Remote ON/OFF Polarity
R = Negative Logic Option
Blank = Positive Logic Option
Height Option (17)
5 = 0.50in (12.70mm)
4 = 0.40in (10.16mm)
Threaded Inserts
T = Threaded Inserts
Blank = Clearance Inserts
Input Voltage
24 = 18 to 36V
48 = 36 to 75V
Number of Outputs
S = Single
RFB300/350 Series
24Vin and 48Vin single output
OUTPUT
INPUT OUTPUT
OUTPUT OUTPUT
EFFICIENCY REGULATION MODEL
POWER
VOLTAGE VOLTAGE
CURRENT CURRENT
(TYP.) LINE LOAD NUMBER (7)
(MAX.) (MIN.) (MAX.)
308W 18 - 36VDC 16.8V - 29.4V 0A 11.0A 90% ±0.15% ±0.2% RFB300-24S28
308W 36 - 75VDC 16.8V - 29.4V 0A 11.0A 91% ±0.15% ±0.2% RFB300-48S28
350W 36 - 75VDC 7.2V - 13.2V 0A 29.2A 88% ±0.15% ±0.2% RFB350-48S12 (17)
350W 36 - 75VDC 16.8V - 29.4V 0A 12.5A 91% ±0.15% ±0.2% RFB350-48S28
Notes
1Measurement Bandwidth: 20MHz; Measured with 1µF ceramic and a
330µF (470µF for 12V output model) aluminum or solid tantalum
capacitor across the output terminals.
2Di/dt = 1A/µs; ∆Iout = ±25% Iout (max); Vin = Vnom; Iout = Inom. Tested
with a 1µF ceramic and a 330µF (470µF for 12V output model) aluminum
electrolytic capacitor across the output.
3External input fusing required. Use a fast acting fuse: 40A (24V model),
15A (48V, 350W model).
4Iout = Iout (max) Measured with the input capacitor, Cbypass = 330µF,
and 6µH inductor in series with the power source. Frequencies >100kHz.
5Signal line assumed <3m in length.
6This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand-alone product.
7Negative remote ON/OFF option also available. Add suffix ‘-R’ to part
number, for example see part numbering system.
8With the enable signal asserted, this is the time from when the input
current reaches 10% of the final steady state value until the output
voltage reaches 10% of the nominal output value. Start-up into resistive
load.
9With Vin > Vin (min) applied for a minimum of 1 second, this is the time
from when the primary ON/OFF signal is activated until the output
voltage reaches 10% of the nominal output voltage.
Notes Contd.
10 Minimum effective ESR is 1mΩ. Minimum phase margin is 35º.
11 Measured per ETSI 300 132-2 Section 4.7.2.
12 From 10% to 90% of Vout(nom). Full resistive load. 1µF ceramic and
330µF (470µF for 12V model) electrolytic capacitors across the output.
13 Converter guaranteed ON for positive option.
14 Maximum driver leakage to insure converter is ON.
15 Converter guaranteed OFF for positive option.
16 Driver sink current @ Vrc ≤ 1.2V.
17 0.40in height option is not available on the 12V output model.
PROTECTION
Short-circuit 12V model 39.4A
(Brickwall current 28V model RFB300 14.3A
limiting) 28V model RFB350 16.3A
Over-voltage protection 12V model 15.0V
(Output shutdown) 28V model 33.2V
Over-temperature (midpoint of baseplate) 110ºC
shutdown
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC/DC CONVERTERS 308W and 350W Half brick 3
NEW Product
File Name: rfb300_350.pdf Rev (01): 16 Sept 2004
-Out
-Sen
+Out
Vadj
+Sen
+IN
-IN
Case
RC
1µF
50V 330µF
330µF
Figure 1 - Standard Application - 28V Output Models
-Out
-Sen
+Out
Vadj
+Sen
+IN
-IN
Case
RC
1µF
50V
470µF
330µF
Figure 2 - Standard Application - 12V Output Model
RFB300/350 Series
24Vin and 48Vin single output
OUTPUT CURRENT (A)
TEMPERATURE (ºC) BASEPLATE
0
2
4
6
8
10
12
-40 -20 0 20 40 60 80 100
Figure 3 - De-rating Curve - RFB300 - 28V Models
OUTPUT CURRENT (A)
TEMPERATURE (ºC) BASEPLATE
0
2
4
6
8
10
12
-40 -20 0 20 40 60 80 100
14
Figure 4 - De-rating Curve - RFB350 - 28V Model
OUTPUT CURRENT (A)
TEMPERATURE (ºC) BASEPLATE
0
5
10
15
20
25
30
-40 -20 0 20 40 60 80 100
Figure 5 - De-rating Curve - RFB350 - 12V Model Figure 6 - Typical Turn-on Delay and Risetime RFB350-48S28
Channel 1: Input Voltage, Channel 2: Output Voltage
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC/DC CONVERTERS 308W and 350W Half brick 4
NEW Product
File Name: rfb300_350.pdf Rev (01): 16 Sept 2004
0 3 6 9 12
84
86
88
90
92
EFFICIENCY (%)
OUTPUT CURRENT (A)
Vin = 48V
Figure 8 - Typical Efficiency vs. Output Current – RFB300-48S28
0 2 4 6 8 10 12 14
85
86
87
88
89
90
91
92
EFFICIENCY (%)
OUTPUT CURRENT (A)
Vin = 48V
Figure 9 - Typical Efficiency vs. Output Current – RFB350-48S28
RFB300/350 Series
24Vin and 48Vin single output
0 6 12 18 24 30
84
86
88
90
92
EFFICIENCY (%)
OUTPUT CURRENT (A)
Vin = 48V
Figure 10 - Typical Efficiency vs. Output Current – RFB350-48S12
Figure 11 - RFB350-48S28 Transient Response
Load 6.25A to 9.38A
Figure 12 - RFB350-48S12 Transient Response
Load 14.5A to 21.75A
0 3 6 9 12
83
85
87
89
91
EFFICIENCY (%)
OUTPUT CURRENT (A)
Vin = 24V
Figure 7 - Typical Efficiency vs. Output Current – RFB300-24S28
File Name: rfb300_350.pdf Rev (01): 16 Sept 2004
Please consult our website for the following items: ✔ Application Note www.artesyn.com
Data Sheet © Artesyn Technologies
®
2004
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.
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC/DC CONVERTERS 300W and 350W Half brick 5
NEW Product
Figure 13 - Mechanical Drawing, Dimension Options and Pin-Out Table
RFB300/350 Series
24Vin and 48Vin single output
PIN CONNECTIONS
PIN NUMBER FUNCTION
-Vin Negative Input Terminal
Case
RC ON/OFF Control Terminal
+Vin Positive Input Terminal
+Vout Positive Output Terminal
+Sen Positive Remote Sense
Vadj Output Adjustment Trim Pin
-Sen Negative Remote Sense
-Vout Negative Output Terminal
Case
-Vin
+Vin
RC
-Sen
Vadj
2x ø0.081 (2.06)
7x ø0.040 (1.02)
-Vout
+Vout
+Sen
0.23 ±0.15 (5.84 ±3.81)
0.00 (0.00)
1.900 (48.26)
0 (0.00)
2.000 (50.80)
0
0.197 (5.01)
0.187 (4.75)
2.27 ±0.01 (57.66 ±0.25)
Case Footprint
2.39 ±0.01
(60.71 ±0.25)
Case Footprint
Do not place labels
on base footprint
HEIGHT
See Dimension Option Table
DIMENSION OPTIONS
OPTION HEIGHT
50.50 +0.05, - 0.15 (12.70 +1.27, -3.81)
40.40 +0.05, -0.15 (10.16 +1.27, -3.81)
