Embedded Power for
Business-Critical Continuity
RFB300/350
Series
Single Output
Total Power:
300 - 350W
Input Voltage: 18 - 36 Vdc
36 - 75 Vdc
# of Outputs: Single
Rev.11.26.07
rfb300/350
1 of 6
Special Features
• High efficiency topology
• Wide temperature range,
-40 °C to +100 °C @ full power
• High power density
(160 W/in
3
in 0.4” tall version)
• Input voltage range:
18-36 Vdc or 36-75 Vdc
• Output voltage range:
7.2-13.2 Vdc or 16.8-29.4 Vdc
• Remote ON/OFF
• Operational insulation system
• Available RoHS compliant
• 2 Year Warranty
RFB300/350 series is a high efficiency, enclosed, isolated dc-dc
converter series in an industry standard half-brick package that
provides up to 350 W 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 Vdc to 36 Vdc and 36 Vdc to
75 Vdc and an output voltage of 12 V and 28 V. The output voltage
is adjustable from 7.2 Vdc to 13.2 Vdc or 16.8 Vdc to 29.4 Vdc (not
to exceed 308 W for the RFB300 [300 W for the RFB300-24S12]
and 350 W for the RFB350). The series also has a remote ON/OFF
capability. Overcurrent, overvoltage and overtemperature
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.
Safety
UL/cUL CAN/CSA 22.2
No. 60950
File No. E135734
VDE0805/EN60950/IEC950
File No. 10401-3336-0198
Licence No. 40005395
Embedded Power for
Business-Critical Continuity
Specifications
All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
External output capacitance required (See Note 4).
ABSOLUTE MAXIMUM RATINGS
Input voltage - peak
(100 ms max.,
1.0 % duty cycle max.)
Input voltage continuous
Adjust pin voltage (with
respect to -sense pin)
OUTPUT SPECIFICATIONS
Voltage adjustability
Min./max. load
Output load capacitance
(See Note 10)
Rise time
INPUT SPECIFICATIONS
Input current
(See Note 3)
Input reflected ripple
(See Note 4)
Input capacitance -
Internal filter
Inrush current
24 Vin
48 Vin RFB300
48 Vin RFB350
24 Vin
48 Vin 12 V model
48 Vin 28 V model
24 Vin
48 Vin
(See Note 11)
23.8 A max. @ lo max.
11.2 A max. @ lo max.
13 A max. @ lo max.
12 mA (pk-pk)
42 mA (pk-pk)
28 mA (pk-pk)
39 μF
13 μF
2 A
2
s
12 Vout
28 Vout
12 Vout
28 Vout
12 Vout
28 Vout
(See Note 12)
7.2-13.2 Vdc
16.8-29.4 Vdc
0/25 A, 0/29.2 A
0/11 A, 0/12.5 A
470 μF to 4,700 μF
330 μF to 3,300 μF
5 ms typ.
24 Vin
48 Vin
24 Vin
48 Vin
-0.5-50 Vdc
-0.5-100 Vdc
-0.5-40 Vdc
-0.5-80 Vdc
-0.5-12 Vdc
EMC CHARACTERISTICS
Conducted emissions
Radiated emissions
GENERAL SPECIFICATIONS
Efficiency
Vin = Vin (nom),
Iout (max.)
Approvals and
standards
Material Flammability
Weight
MTBF @ 55 °C
Telcordia SR-332 Issue 1
0.5 inch tall version
12 V model
28 V model
24 Vin 12 V model
24 Vin 28 V model
48 Vin 12 V model
48 Vin 28 V model
86%
90%
88%
91%
VDE IEC60950
IECEE CB, UL/cUL60950
UL94V-0
110 g (3.88 oz.)
1,900,000 hours min.
2,400,000 hours min.
EN55022
EN55022
See Application Note 167
See Application Note 167
Rev.11.26.07
rfb300/350
2 of 6
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating baseplate,
temperature
Non-operating
-40 °C to +100 °C
-40 °C to +100 °C
RC PIN ELECTRICAL INTERFACE
Open collector compatible (See AN 167 for remote ON/OFF)
RC:
ON voltage
Open circuit voltage
(See Note 13)
5 V min.
5 V min, 11 V typ
13 V max.
-25 μA max.
1.2 V max.
-250 μA max.
High level leakage current (See Note 14)
OFF voltage
(See Note 15)
Low level input current
(See Note 16)
Ordering Information
OUTPUT
POWER
(MAX.)
300 W
308 W
308 W
350 W
350 W
INPUT
VOLTAGE
18-36 Vdc
18-36 Vdc
36-75 Vdc
36-75 Vdc
36-75 Vdc
OUTPUT
VOLTAGE
7.2-13.2 Vdc
16.8-29.4 Vdc
16.8-29.4 Vdc
7.2-13.2 Vdc
16.8-29.4 Vdc
OUTPUT
CURRENT
(MIN.)
0A
0A
0A
0A
0A
OUTPUT
CURRENT
(MAX.)
25 A
11 A
11 A
29.2 A
12.5 A
EFFICIENCY
(TYP.)
86%
90%
91%
88%
91%
REGULATION
LINE
±0.15%
±0.15%
±0.15%
±0.15%
±0.15%
LOAD
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
MODEL
NUMBER (
18,20
)
RFB300-24S12Y
RFB300-24S28Y
RFB300-48S28Y
RFB350-48S12Y
(17)
RFB350-48S28Y
Embedded Power for
Business-Critical Continuity
Rev.11.26.07
rfb300/350
3 of 6
Part
Number System with Options
RFB300-24S28-R5TY
RoHS Compliance
(18)
Y = Non Pb-free (RoHS 5/6 compliant)
J = PB-free (RoHS 6/6 compliant)
19
Threaded Inserts
T = Threaded Inserts
Blank = Clearance Inserts
Height Option
(17)
5 = 0.50 in (12.70 mm)
4 = 0.40 in (10.16 mm)
Remote ON/OFF Polarity
R = Negative Logic Option
Blank = Positive Logic Option
Output Voltage
12 = 7.2 Vdc to 13.2 Vdc
28 = 16.8 Vdc to 29.4 Vdc
Product Family
RFB = Half-Brick
Rated Output Current
300 = 300/308 W
350 = 350 W
Input Voltage
24 = 18 Vdc to 36 Vdc
48 = 36 Vdc to 75 Vdc
Number of Outputs
S = Single
Notes
1
2
3
4
5
6
7
8
9
10
11
12
10
Measurement Bandwidth: 20 MHz; Measured with 1 μF ceramic and a 330 μF
(470 μF for 12 V output model) aluminum or solid tantalum capacitor across
the output terminals.
Di/dt = 1 A/μs; ΔIout = ±25% Iout (max); Vin = Vnom; Iout = Inom. Tested
with a 1 μF ceramic and a 330 μF (470 μF for 12 V output model) aluminum
electrolytic capacitor across the output.
External input fusing required. Use a fast acting fuse: 40 A (24 V model), 15 A
(48 V, 350 W model).
Iout = Iout (max) Measured with the input capacitor, Cbypass = 330 μF, and 6
μH inductor in series with the power source. Frequencies >100 kHz.
Signal line assumed <3 m in length.
This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand-alone product.
Negative remote ON/OFF option also available. Add suffix ‘-R’ to part
number, for example see part numbering system.
With 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.
With 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.
Minimum effective ESR is 1 mΩ. Minimum phase margin is 35
°
.
Measured per ETSI 300 132-2 Section 4.7.2.
From 10% to 90% of Vout (nom). Full resistive load. 1 μF ceramic and 330 μF
(470 μF for 12 V model) electrolytic capacitors across the output.
Minimum effective ESR is 1 mΩ. Minimum phase margin is 35
°
.
11 Measured per ETSI 300 132-2 Section 4.7.2.
12 From 10% to 90% of Vout (nom). Full resistive load. 1 μF ceramic and 330 μF
(470 μF for 12 V 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 ≤ 1.2 V.
17 0.40 in height option is not available on the 12 V output model.
18 The’Y’ suffix indicates that these parts are TSE ToHS 5/6 (non-Pb-free)
compliant
19 New RoHS 6/6 codes coming soon: RFB300-48S28-R5J; RFB350-48S12-R5J.
20 Notice: Some models do not support all options. Please contact your local
sales representative.
PROTECTION
Short-circuit
(Brickwall current
limiting)
Overvoltage protection
(Output shutdown)
Overtemperature
shutdown
12 V model RFB300
12 V model RFB350
28 V model RFB300
28 V model RFB350
12 V model
28 V model
(midpoint of baseplate)
29.4 A
34.4 A
12.9 A
14.7 A
15 V
33.2 V
110 °C
Embedded Power for
Business-Critical Continuity
Specifications Contd.
Rev.11.26.07
rfb300/350
4 of 6
-IN
Case
330
μF
RC
+IN
-Out
-Sen
Vadj
+Sen
+Out
-IN
Case
1
μF
50 V
330
μF
RC
+IN
-Out
-Sen
Vadj
+Sen
+Out
330
μF
1
μF
50 V
470
μF
Figure 1 - Standard Application - 28 V Models
Figure 2 - Standard Application - 12 V Models
OUTPUT CURRENT MAX. (%)
100
80
60
40
20
0
-40
-20
0
20
40
60
80
100
TEMPERATURE (ºC) BASEPLATE
Figure 3 - Derating Curve - All Models
Figure 4 - Typical Turn-on Delay and
Risetime RFB350-48S28Y
Channel 1: Output Voltage, Channel 2: Input Voltage
91
EFFICIENCY (%)
89
87
85
83
0
3
6
9
12
Vin = 24 V
92
EFFICIENCY (%)
90
88
86
84
0
3
6
9
12
Vin = 48 V
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
Figure 5 - Typical Efficiency vs.
Output Current – RFB300-24S28Y
Figure 6 - Typical Efficiency vs.
Output Current – RFB300-48S28Y
Embedded Power for
Business-Critical Continuity
Specifications Contd.
Rev.11.26.07
rfb300/350
5 of 6
92
EFFICIENCY (%)
EFFICIENCY (%)
91
90
89
88
87
86
85
0
2
4
6
8
10
12
14
Vin = 48 V
92
90
88
86
84
0
6
12
18
24
30
Vin = 48 V
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
Figure 7 - Typical Efficiency vs.
Output Current – RFB350-48S28Y
Figure 8 - Typical Efficiency vs.
Output Current – RFB350-48S12Y
PERCENT EFFICIENCY (%)
90
88
86
Vin = 24 V
84
82
80
0
5
10
15
20
25
30
OUTPUT CURRENT (A)
Figure 9 - Typical Efficiency vs.
Output Current – RFB300-24S12Y
Figure 10 - RFB350-48S28Y Transient Response
Load 6.25-9.38 A
Figure 11 - RFB350-48S12Y Transient Response
Load 14.5-21.75 A
