BEL VRP1

NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
VRP1-30E3Ax
RoHS Compliant
Rev.A
Features

Non-Isolated

Under Voltage Protection

High Efficiency

Output Over-Voltage Shutdown

Fixed Frequency

Wide Operating Temperature Range

High Power Density

OCP/SCP

Wide Input

Power Good Signal

Remote Sense

3 Bit VID Trim

Remote On/Off

Low Cost

Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)
Applications

Networking

Computers and peripherals

Telecommunications
Description
The Bel VRP1-30E3Ax is part of the non-isolated dc/dc converter Power Module series. The module uses a SIP
package. These converters are available output voltage trim via the 3 bit VID range from 1.025 Vdc to 1.2 Vdc
over a wide range of input voltage (Vin = 6.5 - 13.8 Vdc).The efficiency is typically 82% @ 12Vin and 1.2Vout at
full load.
Part Selection
Output Voltage
Input Voltage
1.025 - 1.2 Vdc
6.5 - 13.8 Vdc
Max. Output
Current
30 A
Max. Output
Power
36 W
Typical
Efficiency
82%
Model Number
With Load Line
VRP1-30E3A0
Model Number
Without Load Line
VRP1-30E3AD
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation
V R P1 – 30 E 3A x
1 2
3
4
5 6
7
1---Vertical mount
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name, SIP
4---Series code, 30A output
5--- Wide input range (6.5-13.8V)
6---Wide trim
7---Suffix
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
1
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Absolute Maximum Ratings
Parameter
Continuous non-operating Input
Voltage
Min
Typ
Max
Unit
-0.3
-
15
V
Remote On/Off
-0.3
-
15
V
Ambient Temperature
0
-
70
C
Storage Temperature
-40
-
125
C
Notes
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
Min
6.5
Typ
12
Max
13.8
Unit
V
Input Current (full load)
-
-
7
A
Input Current (no load)
-
200
400
mA
Remote Off Input Current
-
20
-
mA
Input Reflected Ripple Current
(rms)
-
30
50
mA
Input Reflected Ripple Current
(pk-pk)
-
75
120
mA
I t Inrush Current Transient
-
-
1
As
Turn-on Voltage Threshold
6.0
6.2
6.5
V
Turn-off Voltage Threshold
5.3
5.5
5.7
V
2
Notes
With simulated source impedance of
10uH, 5Hz to 20MHz. Use a
100uF/100V electrolytic capacitor with
ESR=1 ohm max, at [email protected]°C.
2
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
Recommend a fast-acting fuse with maximum rating of 15A on system board. Refer to the fuse
manufacture’s datasheet for further information.
Note: All specifications are typical at 25 C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Unit
1.211
1.22
1.229
V
Load Line
-
6
-
mOhm
VRP1-30E3A0
Load Regulation
-
±8
±12
mV
VRP1-30E3AD
Line Regulation
-
±5
±10
mV
Temperature Regulation
-
±5
±10
mV
Ripple and Noise (pk-pk)
-
40
60
mV
Ripple and Noise (rms)
-
25
35
mV
Ripple and Noise (pk-pk)
under worst case
-
-
80
mV
Output Current Range
0
-
30
A
Output DC Current Limit
-
120
-
%Iout
Turn on Time
-
10
15
mS
Output Voltage Set Point
Notes
VID=000, Io=0A
0-20MHz BW, 831uF cap on output.
over all operating input voltage, load
and temperature conditions.
OCP latch off
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
2
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Output Specifications (continued)
Min
Typ
Max
Unit
Rise Time
Parameter
-
5
10
mS
Overshoot at Turn on
-
-
5
%
Output Capacitance
-
831
-
uF
Notes
470uF Tan cap+1*1uF+4*10+
6*22+4*47uF ceramic cap
Transient Response
△V50%~75% of
Overshoot
-
-
60
mV
Max Load
Settling Time
-
-
50
uS
△V75%~50% of
Overshoot
-
-
60
mV
Max Load
Settling Time
-
-
50
uS
di/dt=2.5A/us, Vin=12.0Vdc, Ta=25°C,
831uF cap on output.
Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
General Specifications
Min
Typ
Max
Unit
Efficiency
Parameter
-
82
-
%
Switching Frequency
-
500
-
kHz
Weight
-
10.2
-
g
FIT
625
-
1.20 x 0.61 x 0.65
30.48 x 15.49 x 16.52
-
Notes
Vin=12.0V, full load
Calculated Per Bell Core SR-332
(Io=80%load, Ta = 25 C,
9
FIT=10 /MTBF)
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Note: All specifications are typical at 25 C unless otherwise stated.
Efficiency Data
efficiency
Module 1.2V
100.00%
90.00%
80.00%
70.00%
60.00%
50.00%
40.00%
30.00%
20.00%
10.00%
0.00%
3.0
6.5V
12V
13.8V
10.0
15.0
20.00
24.00
30
output current
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
3
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Mar. 07, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Thermal Derating Curves
The thermal reference point Tref is shown above. For reliable operation this temperature should not exceed
110C. The output power of the module should not exceed the rated power for the module.
Vin=12V, Vo=1.2V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
4
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Ripple and Noise Waveform
12Vdc input, 1.2V output
Transient Response Waveforms
Vin=12V,Vo=1.2V,50%~75% load
Vin=12V,Vo=1.2V,75%~50% load
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
5
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Mar. 07, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Startup & Shutdown
Startup time
Startup from Vin
Ch2: Vo
Ch1: Vin
Vin=12V,Vo=1.2V, full load with 831uF cap
Startup from on/off
Ch2: Vo
Ch1: on/off
Vin=12V,Vo=1.2V full load with 831uF cap
Shutdown
Vin=12V, Vo=1.2V, full load with 831uF cap
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
6
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Remote On/Off
Parameter
Signal Low (Unit Off)
Signal High (Unit On)
Active High
Current Sink
Min
-0.3
Typ
-
Max
0.4
Unit
V
2
-
5.5
V
0
-
1
mA
Notes
The remote on/off pin open, Unit off.
Recommended remote on/off circuit for active high
Vin+
Vin+
On/off
On/o ff
Vin-
Vin-
Control with open collector/drain circuit
Control with photocoupler circuit
Vin+
Vin+
On/off
On/off
Vin-
Vin-
Vcc
Control with logic circuit
Permanently off
Load Line
6 mΩ Load Line with ±31.5 mV Tolerance Band
Ooutput Voltage droop (Offset from VID)
0
2
4
6
8
10
12
14
16
18
0.040
0.030
0.020
0.010
0.000
-0.010
-0.020
-0.030
-0.040
-0.050
-0.060
-0.070
-0.080
-0.090
-0.100
-0.110
-0.120
-0.130
-0.140
-0.150
-0.160
-0.170
-0.180
-0.190
-0.200
-0.210
20
22
24
26
28
30
Vout typ
Vout max
Vout min
Load (A)
For VRP1-30E3A0 only
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
7
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Output Voltage Set-Point Adjustment
Trim up circuit (using 3 bit VID: VID2, VID3 and VID4)
VID Hex
VID7
VID6
VID5
DAC Voltage
Output
Voltage
Set Point
(DAC+20mv,
Io=0A)
0
1.200V
1.220V
0
1
1.175V
1.195V
0
1
0
1.150V
1.170V
0
1
1
1.125V
1.145V
VID4
VID3
VID2
42
0
0
46
0
4A
4E
0
1
VID1
0
1
VID0
0
52
1
0
0
1.100V
1.120V
56
1
0
1
1.075V
1.095V
5A
1
1
0
1.050V
1.070V
5E
1
1
1
1.025V
1.045V
Note: VID [4:2] is set to 000b which will set VID=1.2V as default.
Input Under-voltage Lockout
Input Current
Under-voltage Lockout
Voltage Falling
V1=5.33V
V2=6.02V
Voltage Rising
V1
V2
Input Voltage (V)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
8
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Remote Sense
This module has remote sense compensation feature. It can minimize the effects of resistance between
module’s output and load in system layout and facilitates accurate voltage regulation at load terminals or
other selected point.
1. The remote sense lines carries very little current and hence do not require a large cross-sectional area.
2. This module compensates for a maximum drop of 10% of the nominal output voltage.
3. If the unit is already trimmed up, the available remote sense compensation range should be
correspondingly reduced. The total voltage increased by trim and remote sense should not exceed 10%
of the nominal output voltage.
4. When using remote sense compensation, all the resistance, parasitic inductance and capacitance of the
system are incorporated within the feedback loop of this module. It can make an effect on the module's
compensation, affecting the stability and dynamic response. A 0.1uF ceramic capacitor can be
connected at the point of load to de-couple noise on the sense wires.
5. Recommend the connection of remote sense compensation as below figure. There are a resistor RS+
(51.1 ohm) from Vo+ to Sense+ and a resistor RS- (51.1 ohm)) from Vo- to Sense- inside of this module.
RS+
Vo+
Sense+
Load
RS-
Sense-
V o-
6. If not using remote sense compensation, please connect sense directly to output at module's pin, that is,
connect sense+ to Vo+ and sense- to Vo- at module's pin, the shorter the better. See below figure.
RS+
V o+
Sense+
Load
RS-
Sense-
Vo-
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
9
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Power Good
1. This module has a power good indicator output. Power good pin used positive logic and is open collector.
2. Power good pin can sink 10mA.
3. The maximum voltage pulled up externally on Power Good pin should not exceed 6V.
4. When a successful soft-start is completed, the power good pin will be pulled high.
CH1: Output Voltage
CH3: Power Good
Typical Start-up Using Remote ON/OFF(Vin=12.0V, Vout=1.2V, Io=30A)
Fundamental Circuit Diagram
Lf
Vin
S1
Co
Cin
S2
On
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
10
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Mar. 07, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Layout
Layout of components on top side
Layout of components on bottom side
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
11
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Mechanical Outline
Pin
Function
Pin
Function
1
GND
8
Vsense+
2
GND
9
VID2
3
Vout
10
VID3
4
Vout
11
VID4
5
Vout
12
Enable
6
PWRGD
13
Vin
7
Vsense-
14
GND
Note: This module is recommended and compatible with Pb-Free Wave Soldering and must be soldered
using a peak solder temperature of no more than 260 ºC for less than 5 seconds.
Note:
1) All Pins: Material - Copper Alloy;
Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate.
2) Undimensioned components are shown for visual reference only.
3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm).
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
12
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mar. 07, 2011
Signal Definitions
Pin Name
Pin Description
GND
Common return for both input and output.
Vout
Output voltage of the converter.
PWRGD
PWRGD indicates that soft-start has
completed and the output voltage is within
the regulated range around VID setting.
Vsense-
Negative remote sense.
Vsense+
Positive remote sense.
VID2
VID3
VID4
Enable
Vin
Logic level inputs used to set the output
voltage, refer to VID table. Connect VID0
thru VID1 pins to open-drain outputs with
external pull-up resistors or to active-pull-up
outputs. Valid logic low is -0.3V to 0.4V,
valid logic high level is 0.8V to 5.3V.
Logic level input used to enable the
converter when high.
Input voltage of the converter.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
13
NON-ISOLATED DC/DC CONVERTERS
6.5 Vdc - 13.8 Vdc Input, 1.025 Vdc - 1.2 Vdc/30 A Output
OutputConverter
Mar. 07, 2011
Bel Power
Inc., a subsidiary of Bel Fuse Inc.
Revision History
Date
Revision
2011-03-07
A
Changes Detail
Approval
First release
YF Sun
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
2011 Bel Fuse Inc. Specifications subject to change without notice. 030711
14
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com