NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-5.0 V/20 A Output
xRPF-20A1A0
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•
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•
•
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Non-Isolated
Fixed Frequency (275 kHz)
High Efficiency
High Power Density
Power Good Output Signal (open
collector)
Under-Voltage Lockout (UVLO)
RoHS Compliant
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•
•
•
•
Wide Trim Range
Converter Can Sink and Source
Current
OCP/SCP
Remote On/Off
Low Cost
Description
The Bel xRPF-20A1A0 is a new high density open frame non-isolated converter series for space sensitive
applications. Each model has a wide input range (10.2V-13.8V) and offers a wide range of output voltage (0.9 V
- 5.0 V) with a 20 A load. An external resistor adjusts the output voltage from its pre-set value of 0.9 V to any
value up to the 5.0 V maximum. Typical efficiency is 92% at Vo=5 V, Vin=12 V at full load. Typical features
include remote on/off, under-voltage lockout, over-current protection and short circuit protection.
Part Selection
Output
Voltage
0.9 V - 5.0 V
Input
Voltage
12 V
Max. Output
Current
20 A
Max. Output
Power
100 W
Typical
Efficiency
92%
Model Number
Vertical Mount
VRPF-20A1A0
Model Number
Horizontal Mount
0RPF-20A1A0
Note:
Add “G” suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
0
°C
-40
°C
Typ
-
-
-
-
Max
13.8 V
13.8 V
80
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (Source)
Vo=5.0 V
Vo=2.5 V
Vo=0.9 V
Input Current (Sink)
Vo=2.5 V
Vo=0.9 V
Input Current (No Load)
Remote Off Input Current
-
-
-
-
-3.44 A
-0.97 A
95 mA
5 mA
-
-
-
10 mA
Min
10.2 V
-
-
-
Typ
-
9.1 A
4.9 A
2.2 A
Max
13.8 V
-
-
-
Able to sink 20 A output current at any
output voltage up to and including 2.5 V.
Notes
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-5.0 V/20 A Output
Input Specifications (continued)
Parameter
Input Reflected Ripple Current (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Input Reflected Ripple Current (rms)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
External Input Capacitance
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Min
-
-
-
-
-
-
-
8.5 V
7.0 V
Typ
280 mA
250 mA
200 mA
150 mA
80 mA
70 mA
45 mA
40 mA
540 uF
9.0 V
7.6 V
Max
350 mA
320 mA
280 mA
250 mA
120 mA
100 mA
80 mA
60 mA
-
9.5 V
8.3 V
Notes
Tested with simulated source
impedance of 1.5 uH 5Hz to 20 MHz,
and 2
×
270 uF/16 V Oscon
capacitors (ESR
≤
20 mΩ) at the
input
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Output Voltage Set Point
Load Regulation
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Line Regulation
Output Ripple and Noise (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Output Ripple and Noise (rms)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn on
Output Capacitance
Vo=5.0 V
Vo=2.5 V
Vo=0.9 V
Transient Response
50% ~ 75% Max Load
Settling Time V
O
=0.9 V-
5.0 V
75% ~ 50% Max Load
Settling Time
-
-
-
-
-
-
-
-
-
-
-
-
-
0A
25 A
-
-
-
680 uF
680 uF
680 uF
-
-
-
-
-
-
-
-
-
65 mV
60 mV
55 mV
45 mV
18 mV
15 mV
15 mV
10 mV
-
-
-
5 mS
0%Vo
-
-
-
100 mV
40 uS
100 mV
40 uS
0.4%Vo,set
0.4%Vo,set
0.5%Vo,set
1%Vo,set
0.5%Vo,set
80 mV
75 mV
70 mV
55 mV
25 mV
25 mV
20 mV
15 mV
20 A
40 A
0.1 A
2
s
10 mS
3%Vo
5080 uF
7840 uF
11000 uF
150 mV
80 uS
150 mV
80 uS
Test conditions:
di/dt=2.5 A/uS; Vin=12 V; with a 680 uF/6.3
V Oscon capacitor (ESR
≤
12 mΩ),
10 uF/16 V Tantalum capacitor, and 10 nF
ceramic capacitor at the output.
Io=Iomin to Iomax
Min
-2.5%Vo,set
-3.5%Vo,set
Typ
-
-
Max
2.5%Vo,set
3.5%Vo,set
Notes
Vin=12 V, lo=lomax, full load
Over all operating input voltage, resistive
load, and temperature conditions
Vin=Vinmin to Vinmax
Tested at 0-20 MHz BW, with a
680 uF/6.3 V Oscon capacitor (ESR
≤
12
mΩ), 10uF/16V Tantalum capacitor, and
10nF ceramic capacitor at the output.
Note:
All specifications are typical at nominal input, full load at 25
°C
unless otherwise stated.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-5.0 V/20 A Output
Min
89%
86%
83%
65%
79%
60%
240 kHz
0.9 V
Typ
92%
89%
86%
69%
82%
63%
275 kHz
-
5,570,000 hours
1.2 x 1.1 x 0.457
30.48 x 27.94 x 11.6
1.2 x 1.1 x 0.508
30.48 x 27.94 x 12.91
15 g
Max
-
-
-
-
-
-
310 kHz
5.0 V
Notes
General Specifications
Parameter
Efficiency (Current Source)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Efficiency (Current Sink)
Vo=2.5 V
Vo=0.9 V
Switching Frequency
Output Voltage Trim Range
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
Measured at Vin=12 V, full load.
Vo=0.9 V when the Trim pin is open.
Calculated Per Bell Core SR-332 (I
O
=
Nominal; T
a
= 25
°C)
VRPF-20A1A0
0RPF-20A1A0
-
-
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit Off)
Signal High (Unit On)
Power Good
Power Good Delay
1
Min
-0.3 V
2.4 V
-
Typ
-
-
-
Max
0.8 V
13.8 V
8 mS
Notes
Remote On/Off pin open, unit on.
Note:
All specifications are typical at 25
°C
unless otherwise stated.
1. the power good signal is an open collector output. When the output of the module reaches 90% of the
nominal set point, the power good pin is set high.
Output Trim Equations
Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up resistor should be connected between the Trim pin and Ground. Trim values should not be less than
280Ω.
R
trim
1.17
=
V
adj
−
0.9
Vout
Module
Trim
GND
Rtrim
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up voltage should be connected between the Trim pin and Ground.
Vout
Rs
×
(1.3
Vt
−
1.17 )
Rt
=
1.17
−
Rs
×
(
V
adj
−
0.9 )
Module
Rt
Trim
Rs
GND
Vt
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-5.0 V/20 A Output
Efficiency Data
5.0V Vout(SOURCE)
93.0%
Efficiency
90.0%
87.0%
84.0%
81.0%
78.0%
2.0
5.0
10.0
15.0
20.0
10.2V
12.0V
13.8V
Output Current (A)
2.5V Vout(SOURCE)
91.0%
88.0%
Efficiency
85.0%
82.0%
79.0%
76.0%
73.0%
2.0
5.0
10.0
Output Current (A)
15.0
20.0
10.2V
12.0V
13.8V
0.9V Vout(SOURCE)
85.0%
80.0%
75.0%
Efficiency
70.0%
65.0%
60.0%
55.0%
50.0%
2.0
5.0
10.0
Output Current (A)
15.0
20.0
10.2V
12.0V
13.8V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-5.0 V/20 A Output
Thermal Derating Curves
Vo=5 V; Vin=12 V
Vo=2.5 V; Vin=12 V
Vo=0.9 V; Vin=12 V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
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