SLIN-30E1AL - Bel Fuse Inc.

NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
SLIN-30E1Ax
RoHS Compliant
Rev.A
Features
•
Wide Input Voltage Range
•
Output voltage sequencing
•
High Efficiency
•
Over Temperature Protection
•
Monotonic start-up
•
Output Over Current Protection
•
Remote On/Off
•
Startup into pre-biased output
•
Remote Sense
•
Tunable LoopTM (a registered trademark of Lineage Power Systems) to Optimize Dynamic
output voltage response
•
Parallel operation with active current sharing
•
Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)
•
Compliant to RoHS EU Directive 2002/95/EC
•
UL* 60950 Recognized, CSA† C22.2 No. 60950-00 Certified
•
VDE‡ 0805 (EN60950-1 3rd edition) Licensed
Applications
•
•
•
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
•
•
Servers and storage applications
Networking equipment
Description
The SLIN-30E1Ax power modules are non-isolated dc-dc converters that can deliver up to 30 A of output current.
These modules operate over a wide range of input voltage (VIN = 6 Vdc - 14 Vdc) and provide a precisely
regulated output voltage from 0.8 Vdc to 2.75 Vdc, programmable via an external resistor. Features include
remote On/Off, adjustable output voltage, over current and over temperature protection, output voltage
sequencing and paralleling with active current sharing. A new feature, the Tunable LoopTM, allows the user to
optimize the dynamic response of the converter to match the load with reduced amount of output capacitance
leading to savings on cost and PWB area.
Part Selection
Output Voltage
Input Voltage
0.8 Vdc - 2.75 Vdc
6.0 Vdc - 14 Vdc
Max. Output
Current
30 A
Typical
Efficiency
91.8%
Model Number
Active High
SLIN-30E1A0
Model Number
Active Low
SLIN-30E1AL
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Part Number Explanation
S LIN – 30 E 1A 0
1
2
3 4
5
6
1---Surface mount
2---Series code
3---Output current (30A)
4--- Wide input voltage range (6.0-14V)
5--- Wide output voltage range (0.8-2.75V)
6--- Enable, active high, change “0” to “L” means active low
Absolute Maximum Ratings
Min
Typ
Max
Unit
Continuous Input Voltage
-0.3
-
15
V
Sequencing Voltage
-0.3
-
15
V
Operating Ambient Temperature
-40
-
85
°C
Storage Temperature
-55
-
125
°C
Parameter
Notes
Note: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These
are absolute stress ratings only, functional operation of the device is not implied at these or any other
conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute
maximum ratings for extended periods can adversely affect the device reliability.
Input Specifications
Parameter
Operating Input Voltage
Min
6.0
Typ
12
Max
14
Unit
V
Input Current (full load)
-
-
15.8
A
-
91
-
mA
Vo=0.8V, VIN=12V, IO=0, module enabled
-
205
-
mA
Vo=2.5V, VIN=12V, IO=0, module enabled
Input Stand-by Current
-
20
-
mA
VIN = 12V, module disabled
Input Reflected Ripple Current
(pk-pk)
-
100
-
mA
5Hz to 20MHz, 1μH source impedance; VIN
=6.0 to 14V, IO= IOmax
I2t Inrush Current Transient
-
-
1
A2s
Input Ripple Rejection (120Hz)
-
50
-
dB
Turn-on Threshold
-
5.5
-
V
Turn-off Threshold
-
5.0
-
V
Input Current (no load)
Notes
VIN= VIN,min, Vo=VO,set, IO = IO,max
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to
an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not
included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety
agencies require a fast-acting fuse with a maximum rating of 20A. Based on the information provided in this
data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be
used. Refer to the fuse manufacturer’s data sheet for further information.
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and
temperature conditions.
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Output Specifications
Parameter
Min
Typ
Max
Unit
Output Voltage Set Point
-1.5
-
+1.5
%Vo,set
VIN=VIN,nom, IO=IO, nom
Output Voltage
-3.0
-
+3.0
%Vo,set
Over all operating input voltage, resistive load,
and temperature conditions until end of life
Adjustment Range
0.8
-
2.75
V
Remote Sense Range
-
-
0.5
V
Load Regulation
-
-
10
mV
IO=IO, min to IO, max
Line Regulation
-
-
10
mV
VIN=VIN, min to VIN, max
Temperature Regulation
(-40°C to 85°C)
-
0.5
1
%Vo,set
Tref=TA, min to TA, max
Ripple and Noise (pk-pk)
-
-
50
mV
Output Current Range
0
-
30
A
Output DC Current Limit
-
140
-
%Io,max
Output Short-Circuit Current
-
3.5
-
A
Vo≤250mV, Hiccup Mode
Output Capacitance
ESR≥ 1 mΩ
ESR≥0.15 mΩ
ESR≥ 10 mΩ
0
0
0
-
200
1000
10000
uF
uF
uF
Without the Tunable LoopTM
TM
With the Tunable Loop
With the Tunable LoopTM
-
2.5
5
mS
Case 1: On/Off input is enabled and then input
power is applied (delay from instant at which
VIN = VIN, min until Vo =10% of Vo, set)
Turn-On Delay Time
Notes
selected by an external resistor
5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to
IO, max, Co = 0.1μF // 47 μF ceramic capacitors
Hiccup Mode
-
2.5
5
mS
Case 2: Input power is applied for at least one
second and then the On/Off input is enabled
(delay from instant at which Von/Off is enabled
until Vo =10% of Vo, set)
Output voltage Rise time
2
-
10
mS
time for Vo to rise from 10% of Vo, set to 90%
of Vo, set
Output voltage overshoot
-
-
3
%Vo,set
Vin=Vin, min to Vin, max, Io=Io, max, With or without
maximum external capacitance
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and
temperature conditions.
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
General Specifications
Parameter
Min
Typ
Max
Unit
-
83.0
87.1
90.1
91.8
-
%
%
%
%
Switching Frequency
-
300
-
kHz
Over Temperature Protection
-
125
-
°C
Sequencing Slew rate capability
-
-
2
V/mS
10
-
-
mS
Tracking Accuracy
Power-Up: 2V/ms
Power-Down: 1V/ms
-
100
200
200
400
mV
mV
Forced Load Share Accuracy
-
10
-
%Io
Notes
Efficiency
Vo=0.8V
Vo=1.2V
Vo=1.8V
Vo=2.5V
Sequencing Delay time
Number of Units in Parallel
Weight
VIN, min to VIN, max; IO, min to IO, max
VSEQ < Vo
Delay from VIN, min to application of
voltage on SEQ pin
VIN, min to VIN, max; IO, min - IO, max
VSEQ < Vo
5
-
MTBF
Vin= 12Vdc, Ta=25°C
Io=Io, max , Vo= Vo,set
7.04
-
g
4,443,300
hours
1.30 x 0.53 x 0.39
33.02 x 13.46 x 10.0
-
Calculated MTBF (Vin=12V,
Io=80% full load, Vo=2.5V,
Ta=40°C, 200LFM) per Telecordia
Method Issue 2, Method I Case 3
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and
temperature conditions.
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
95
95
90
90
EFFICIENCY, η (%)
EFFICIENCY, η (%)
Efficiency Data
85
80
Vin=12V
75
Vin=6V
Vin=14V
85
Vin=12V
80
Vin=6V
70
70
0
5
10
15
20
25
0
30
5
OUTPUT CURRENT, IO (A)
10
15
20
25
30
25
30
OUTPUT CURRENT, IO (A)
Vo=0.8V
Vo=1.2V
100
95
95
EFFICIENCY, η (%)
90
EFFICIENCY, η (%))
Vin=14V
75
85
Vin=12V
Vin=6V
80
Vin=14V
75
70
90
85
Vin=12V
Vin=14V
Vin=6V
80
75
70
0
5
10
15
20
OUTPUT CURRENT, IO (A)
Vo=1.8V
25
30
0
5
10
15
20
OUTPUT CURRENT, IO (A)
Vo=2.5V
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Thermal Derating Curves
35
30
OUTPUT CURRENT, Io (A)
30
OUTPUT CURRENT, Io (A)
35
1m/s
(200LFM)
25
NC
20
15
0.5m/s
(100LFM)
10
5
0
35
45
55
65
75
25
20
NC
15
0.5m/s
(100LFM)
10
5
0
35
85
O
45
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
30
25
NC
0.5m/s
(100LFM)
1m/s
(200LFM)
10
1.5m/s
(300LFM)
0
35
45
55
65
75
AMBIENT TEMPERATURE, TA OC
Vo=1.8V
85
35
2m/s
(400LFM)
5
75
Vo=1.2V
35
15
65
AMBIENT TEMPERATURE, TA C
Vo=0.8V
20
55
O
AMBIENT TEMPERATURE, TA C
30
1m/s
(200LFM)
85
25
20
NC
0.5m/s
(100LFM)
1m/s
(200LFM)
15
10
1.5m/s
(300LFM)
5
2m/s
(400LFM)
0
35
45
55
65
75
85
AMBIENT TEMPERATURE, TA OC
Vo=2.5V
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT VOLTAGE
VO (V) (20mV/div)
Ripple and Noise Waveforms
TIME, t (1μs/div)
TIME, t (1μs/div)
Vo=1.2V, Vin=12V, Io = Io,max
COUT = 0.1μF // 47 μF ceramic capacitors
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT VOLTAGE
VO (V) (20mV/div)
Vo=0.8V, Vin=12V, Io = Io,max
COUT = 0.1μF // 47 μF ceramic capacitors
TIME, t (1μs/div)
Vo=1.8V, Vin=12V, Io = Io,max
COUT = 0.1μF // 47 μF ceramic capacitors
TIME, t (1μs/div)
Vo=2.5V, Vin=12V, Io = Io,max
COUT = 0.1μF // 47 μF ceramic capacitors
.
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
OUTPUT VOLTAGE
VO (V) (200mV/div)
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=1.2V
OUTPUT VOLTAGE
VO (V) (200mV/div)
OUTPUT VOLTAGE
VO (V) (200mV/div)
OUTPUT CURRENT,
IO (A) (5Adiv)
OUTPUT CURRENT,
IO (A) (5Adiv)
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=0.8V
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=1.8V
OUTPUT CURRENT,
IO (A) (5Adiv)
OUTPUT CURRENT,
IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (200mV/div)
Transient Response Waveforms
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=2.5V
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
OUTPUT VOLTAGE
Vo (V) (500mV/div)
OUTPUT VOLTAGE
Vo (V) (200mV/div)
ON/OFF VOLTAGE
VON/OFF (V) (5V/div)
ON/OFF VOLTAGE
VON/OFF (V) (5V/div)
Startup Time
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V
OUTPUT VOLTAGE
Vo (V) (500mV/div)
OUTPUT VOLTAGE
Vo (V) 1V/div)
ON/OFF VOLTAGE
VON/OFF (V) (5V/div)
ON/OFF VOLTAGE
VON/OFF (V) (5V/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=0.8V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
INPUT VOLTAGE
VIN (V) (5V/div)
OUTPUT VOLTAGE
Vo(V) (500mV/div)
OUTPUT VOLTAGE
Vo(V) (200mV/div)
INPUT VOLTAGE
VIN (V) (5V/div)
Startup Time (continued)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=1.2V
OUTPUT VOLTAGE
Vo(V) (1V/div)
OUTPUT VOLTAGE
Vo(V) (500mV/div)
INPUT VOLTAGE
VIN (V) (5V/div)
INPUT VOLTAGE
VIN (V) (5V/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=0.8V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=1.8V
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=2.5V
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Test Configurations
Input Reflected Ripple Current Test Setup.
CURRENT PROBE
TO OSCILLOSCOPE
LTEST
VIN(+)
BATTERY
1μH
CS
CIN
220μF
Min
150μF
E.S.R.<0.1Ω
@ 20°C 100kHz
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Output Ripple and Noise Test Setup.
COPPER STRIP
VO (+)
RESISTIVE
LOAD
1uF
.
10uF
SCOPE
COM
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Output Voltage and Efficiency Test Setup.
Rdistribution
Rcontact
Rcontact
VIN(+)
RLOAD
VO
VIN
Rdistribution
Rcontact
Rcontact
COM
Rdistribution
VO
Rdistribution
COM
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
VO. IO
Efficiency
η =
VIN. IIN
x
100 %
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Input Filtering
The SLIN-30E1Ax module should be connected to a low ac-impedance source. A highly inductive source can
affect the stability of the module. An input capacitor must be placed directly adjacent to the input pin of the
module, to minimize input ripple voltage and ensure module stability.
To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the
module. The figure below shows the input ripple voltage for various output voltages at 30A of load current with
1x22µF, 2x22 µF or 2x47 µF ceramic capacitors and an input of 12V.
400
1x22uF
2x22uF
2x47uF
Input Ripple Voltage (mVp-p)
350
300
250
200
150
100
50
0
0.5
1
1.5
2
2.5
Output Voltage (Vdc)
Output Filtering
The SLIN-30E1Ax modules are designed for low output ripple voltage and will meet the maximum output ripple
specification with no external capacitors. However, additional output filtering may be required by the system
designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the
module. Second, the dynamic response characteristics may need to be customized to a particular load step
change.
To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at
the output can be used. Low ESR ceramic and polymer are recommended to improve the dynamic response of
the module. For stable operation of the module, limit the capacitance to less than the maximum output
capacitance as specified in the electrical specification table. Optimal performance of the module can be
achieved by using the Tunable Loop feature described later in this data sheet.
100
Ripple(mVp-p)
80
60
1x10uF External Cap
1x47uF External Cap
2x47uF External Cap
4x47uF External Cap
40
20
0
0.5
1
1.5
2
Output Voltage(Volts)
2.5
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation
requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE
0850:2001-12 (EN60950-1) Licensed. The SLIN-30E1Ax was tested using a 30A, time delay fuse in the
ungrounded input.
For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input
must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV.
The input to these units is to be provided with a time-delay fuse with a maximum rating of 30A in the positive
input lead.
Remote On/Off
Parameter
Signal Low (Unit On)
Signal High (Unit Off)
Active Low
Min
-0.3
Typ
-
Max
1.2
Unit
V
3.0
-
Vin,max
V
Notes
The remote on/off pin open, Unit off.
The SLIN-30E1Ax power modules feature an On/Off pin for remote On/Off operation. If not using the On/Off pin,
connect the pin to ground (the module will be ON). The On/Off signal (Von/off) is referenced to ground. The circuit
configuration for remote On/Off operation of the module using the On/Off pin is shown below.
During a Logic High on the On/Off pin (transistor Q1 is OFF), the module remains OFF. The external resistor R1
should be chosen to maintain 3.0V minimum on the On/Off pin to ensure that the module is OFF when transistor
Q1 is in the OFF state. Suitable values for R1 are 4.7K for input voltage of 12V and 3K for 5Vin. During LogicLow when Q1 is turned ON, the module is turned ON.
The On/Off pin can also be used to synchronize the output voltage start-up and shutdown of multiple modules in
parallel. By connecting On/Off pins of multiple modules, the output start-up can be synchronized (please refer to
characterization curves). When On/Off pins are connected together, all modules will shutdown if any one of the
modules gets disabled due to under voltage lockout or over temperature protection
VIN+
MODULE
Thermal SD
R1
PWM Enable
I ON/OFF
ON/OFF
+
VON/OFF
1K
100K
Q1
100K
GND
_
Remote On/Off Implementation using ON/OFF
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
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Jan. 11, 2010
Over Current Protection
Bel Power Inc., a subsidiary of Bel Fuse Inc.
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting
circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup
mode. The unit operates normally once the output current is brought back into its specified range.
Over Temperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will
shutdown if the over temperature threshold of 125°C is exceeded at the thermal reference point Tref. The thermal
shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit
goes into thermal shutdown it will then wait to cool before attempting to restart.
Input Under-voltage Lockout
At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will
begin to operate at an input voltage above the under voltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the SLIN-30E1Ax can be programmed to any voltage from 0.8dc to 2.75Vdc by connecting
a resistor (shown as Rtrim in the figure below) between Trim and GND pins of the module. Without an external
resistor between Trim and GND pins, the output of the module will be 0.8Vdc. To calculate the value of the trim
resistor, Rtrim for a desired output voltage, use the following equation:
⎡ 8000 ⎤
Rtrim = ⎢
⎥Ω
⎣Vo − 0.8 ⎦
Rtrim is the external resistor in Ω
Vo is the desired output voltage
By using a ±0.5% tolerance trim resistor with a TC of ±100ppm, a set point tolerance of ±1.5% can be achieved
as specified in the electrical specification. Table 1 provides Rtrim values required for some common output
voltages.
Table 1
V I N(+)
VO, set (V)
0.8
1.0
1.2
1.5
1.8
2.5
Rtrim (KΩ)
Open
40
20
11.429
8
4.706
V O( +)
SENS E
ON/OF F
LOAD
TRIM
R tr im
GND
Circuit configuration to program output voltage using
an external resistor
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
14
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Remote Sense
The SLIN-30E1Ax power modules have a Remote Sense feature to minimize the effects of distribution losses by
regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed
0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the
voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect
the SENSE pin to the VOUT pin.
Voltage Margining
Output voltage margining can be implemented in the SLIN-30E1Ax modules by connecting a resistor, Rmargin-up,
from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down,
from the Trim pin to output pin for margining-down. The figure below shows the circuit configuration for output
voltage margining.
Vo
Rmargin-down
MODULE
Q2
Trim
Rmargin-up
Rtrim
Q1
GND
Circuit Configuration for margining Output voltage
Monotonic Start-up and Shutdown
The SLIN-30E1Ax modules have monotonic start-up and shutdown behavior for any combination of rated input
voltage, output current and operating temperature range.
Startup into Pre-biased Output
The SLIN-30E1Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the
set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
15
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Output Voltage Sequencing
The SLIN-30E1Ax modules include a sequencing feature that enables users to implement various types of output
voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using
the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected.
When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches
the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the
module. The output voltage follows the voltage on the SEQ pin on a one-to-one basis. By connecting multiple
modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin.
For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left
unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the
module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required before
applying voltage on the SEQ pin. This delay gives the module enough time to complete its internal power-up softstart cycle. During the delay time, the SEQ pin should be held close to ground (nominally 50mV ± 20 mV). This is
required to keep the internal op-amp out of saturation thus preventing output overshoot during the start of the
sequencing ramp. By selecting resistor R1 according to the following equation:
R1 =
24950
ohms
V IN − 0.05
the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero.
MODULE
VIN+
499K
+
OUT
R1
SEQ
10K
-
GND
Circuit showing connection of the sequencing signal to the SEQ pin
After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will
track this voltage on a one-to-one volt basis until the output reaches the set-point voltage. To initiate
simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output
voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input
voltage must be maintained until the tracking and output voltages reach ground potential.
When using the sequencing feature to control start-up of the module, pre-bias immunity during start-up is
disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during startup. When using the sequencing feature, modules goes through an internal set-up time of 10msec, and will be in
synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking
current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during start-up is
required, the sequencing feature must be disabled. For additional guidelines on using the sequencing feature
please contact the Bel Power technical representatives for additional information.
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16
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6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Active Load Sharing
For additional power requirements, the SLIN-30E1Ax power module is also available with a parallel option. Up to
five modules can be configured, in parallel, with active load sharing.
Good layout techniques should be observed when using multiple units in parallel. To implement forced load
sharing, the following connections should be made:
• The share pins of all units in parallel must be connected together. The path of these connections should be
as direct as possible.
•
All remote-sense pins should be connected to the power bus at the same point, i.e., connect all the
SENSE(+) pins to the (+) side of the bus. Close proximity and directness are necessary for good noise
immunity.
Some special considerations apply for design of converters in parallel operation:
• When sizing the number of modules required for parallel operation, take note of the fact that current sharing
has some tolerance. In addition, under transient conditions such as a dynamic load change and during
startup, all converter output currents will not be equal. To allow for such variation and avoid the likelihood of
a converter shutting off due to a current overload, the total capacity of the paralleled system should be no
more than 75% of the sum of the individual converters. As an example, for a system of four SLIN-30E1Ax
converters in parallel, the total current drawn should be less that 75% of (4 x 30A) , i.e. less than 90A.
•
All modules should be turned on and off together. This is so that all modules come up at the same time
avoiding the problem of one converter sourcing current into the other leading to an over current trip condition.
To ensure that all modules come up simultaneously, the on/off pins of all paralleled converters should be tied
together and the converters enabled and disabled using the on/off pin.
The share bus is not designed for redundant operation and the system will be non-functional upon failure of one
of the unit when multiple units are in parallel. In particular, if one of the converters shuts down during operation,
the other converters may also shut down due to their outputs hitting current limit. In such a situation, unless a
coordinated restart is ensured, the system may never properly restart since different converters will try to restart
at different times causing an overload condition and subsequent shutdown. This situation can be avoided by
having an external output voltage monitor circuit that detects a shutdown condition and forces all converters to
shut down and restart together.
Tunable LoopTM
The SLIN-30E1Ax modules have a new feature that optimizes transient response of the module called Tunable
LoopTM.
External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and
noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load
current changes. Adding external capacitance however affects the voltage control loop of the module, typically
causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause
the module to become unstable.
The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network
connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C between
the SENSE and TRIM pins of the module. This R-C allows the user to externally adjust the voltage loop feedback
compensation of the module.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
17
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Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Tunable LoopTM (continued)
VOUT
SENSE
RTUNE
MODULE
CO
CTUNE
TRIM
GND
RTrim
Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module
Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3.
Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up
to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE
and CTUNE according to Table 2 will ensure stable operation of the module.
In applications with tight output voltage limits in the presence of dynamic current loading, additional output
capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output
voltage deviation limits for some common output voltages in the presence of a 15A to 30A step change (50% of
full load), with an input voltage of 12V.
Table 2.General recommended values of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor
combinations.
Co
RTUNE
CTUNE
1x47μF
560
270pF
2x47μF
390
470pF
4x47μF
390
820pF
10x47μF 20x47μF
220
220
2200pF 4700pF
Table 3.Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 15A step
load with Vin=12V.
Vo
Co
RTUNE
CTUNE
ΔV
2.5V
3x47μF +
3x330μF
Polymer
390
3900pF
50mV
1.8V
3x47μF +
4x330μF
Polymer
330
6800pF
36mV
1.2V
7x330μF
Polymer
220
10nF
24mV
0.8V
2x47μF+
10x330μF
Polymer
150
56nF
16mV
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
18
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Thermal Considerations
Power modules operate in a variety of thermal environments; however, sufficient cooling should always be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow, module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The
thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is
shown below.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
12.7_
(0.50)
Probe Location
for measuring
airflow and
ambient
temperature
Air
flow
Thermal Test Setup
The thermal reference points, Tref used in the specifications is shown below. For reliable operation the
temperatures at this point should not exceed 125oC. The output power of the module should not exceed the rated
power of the module (Vo,set x Io,max).
Q6 & L2 Tref
AIRFLOW
DIRECTION
Preferred airflow direction and location of hot-spot of the module (Tref).
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
19
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Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Example Application Circuit
Requirements:
Vin:
Vout:
Iout:
ΔVout:
Vin, ripple
12V
1.8V
22.5A max., worst case load transient is from 15A to 22.5A
1.5% of Vout (27mV) for worst case load transient
1.5% of Vin (50mV, p-p)
CI1
CI2
CO1
CO2
CTune
RTune
RTrim
2x22μF/16V ceramic capacitor (e.g. TDK C Series)
100μF/16V bulk electrolytic
3x47μF/6.3V ceramic capacitor (e.g. TDK C Series, Murata GRM32ER60J476ME20)
330μF/4V Polymer/Poscap, Low EST (e.g. Sanyo Poscap 4TPE470MCL)
15nF ceramic capacitor (can be 1206, 0805 or 0603 size)
430 ohms SMT resistor (can be 1206, 0805 or 0603 size)
8kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
20
NON-ISOLATED DC/DC CONVERTERS
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Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Mechanical Outline
Pin No.
1
2
3
4
5
6
7
8
9
10
Function
On/Off
VIN
SEQ
GND
VOUT
TRIM
SENSE
GND
SHARE
GND
BOTTOM VIEW
SIDE VIEW
TOP VIEW
Co-planarity (max) : 0.102[0.004]
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
21
NON-ISOLATED DC/DC CONVERTERS
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Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Mechanical Outline (continued)
Recommended Pad Layout
Pin 8
Pin 10
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
22
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6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Packaging Details
The SLIN-30E1Ax modules are supplied in tape & reel as standard.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions:
Inside Dimensions:
Tape Width:
330.2 mm (13.00’’)
177.8 mm (7.00”)
44.00 mm (1.73”)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
23
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Surface Mount Information
Pick and Place
The SLIN-30E1Ax modules use an open frame construction and are designed for a fully automated assembly
process. The modules are fitted with a label designed to provide a large surface area for pick and place
operations. The label meets all the requirements for surface mount processing, as well as safety standards, and
is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as part
number and serial number.
Pick and Place Location.
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Even so, these modules
have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size,
tip style, vacuum pressure and pick & placement speed should be considered to optimize this process. The
minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer
diameter, which will safely fit within the allowable component spacing, is 5 mm max.
Tin Lead Soldering
The SLIN-30E1Ax power modules are lead free modules and can be soldered either in a lead-free solder process
or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order
to customize the solder reflow profile for each application board assembly. The following instructions must be
observed when soldering these units. Failure to observe these instructions may result in the failure of or cause
damage to the modules, and can adversely affect long-term reliability.
In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than 235oC.
Typically, the eutectic solder melts at 183oC, wets the land, and subsequently wicks the device connection.
Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are
several types of SMT reflow technologies currently used in the industry. These surface mount power modules
can be reliably soldered using natural forced convection, IR (radiant infrared), or a combination of convection/IR.
For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP
connector temperatures.
Lead Free Soldering
The SLIN-30E1Ax modules are lead-free (Pb-free) and RoHS compliant and are both forward and backward
compatible in a Pb-free and a SnPb soldering process. Failure to observe the instructions may result in the
failure of or cause damage to the modules and can adversely affect long-term reliability.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
24
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic
Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This
standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the
package. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using
Sn/Ag/Cu solder is shown below.
300
240
P eak Temp 235oC
REFLOW TEMP (°C)
200
Co o ling
zo ne
1-4oCs -1
Heat zo ne
max 4oCs -1
150
100
50
So ak zo ne
30-240s
Tlim above
205oC
P reheat zo ne
max 4oCs -1
MAX TEMP SOLDER (°C)
235
250
230
225
220
215
210
205
200
0
0
REFLOW TIME (S)
Reflow Profile for Tin/Lead (Sn/Pb) process
10
20
30
40
50
60
Time Limit Curve Above 205oC Reflow for Tin
Lead (Sn/Pb) process
MSL Rating
The SLIN-30E1Ax modules have a MSL rating of 2.
Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages
is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface
Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These
sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the
product at conditions of <= 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A).
The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored
at the following conditions: < 40° C, < 90% relative humidity.
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result
of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the
finished circuit-board assembly.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
25
NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jan. 11, 2010
Revision History
Date
Revision
2010-1-11
A
Changes Detail
Approval
First release
T. Bubriski
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
©2010 Bel Fuse Inc. Specifications subject to change without notice. 011110
26
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