SLDN-06D1A0 [BEL]
3-14.4 VDC Input / 0.45 VDC 6 A Output;
| 型号： | SLDN-06D1A0 |
| 厂家： | 
BEL FUSE INC. |
| 描述： | 3-14.4 VDC Input / 0.45 VDC 6 A Output |
| 文件： | 总53页 (文件大小：1972K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
The SLDN-06D1Ax modules are non-isolated dc-dc converters that
deliver up to 6A of output current. These modules operate over a wide
range of input voltage (VIN = 3 - 14.4 VDC) and provide a precisely
regulated output voltage from 0.45 VDC to 5.5 VDC, programmable via
an external resistor and further adjustable through Power Management
Bus.
Features include a digital interface using the Power Management Bus
protocol, remote On/Off, adjustable output voltage, over current and
overtemperature protection. The Power Management Bus interface
supports a range of commands to control and monitor the module.
The Tunable LoopTM feature 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.
3-14.4 VDC Input / 0.45 VDC @ 6 A Output
Wide Input Voltage Range
Fixed Switching Frequency
Power Good Signal
Remote On/Off
Digital interface through the Power Management Bus protocol
Ability to Sink and Source Current
Cost Efficient Open Frame Design
•
•
•
•
•
•
•
•
•
•
Over Temperature Protection
Tunable LoopTM (a registered trademark of Lineage Power Systems)
to Optimize Dynamic output voltage response
Flexible output voltage sequencing EZ-SEQUENCE
Output overcurrent protection (non-latching)
Wide operating temperature range [-40°C to 85°C]
Class II, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592A)
Compliant to RoHS EU Directive 2002/95/EC
Compatible in a Pb-free or SnPb reflow environment
Certificated to UL60950-1/CSA C22.2 No.60950-1, 2rd
•
•
•
•
•
•
•
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
•
•
•
•
•
•
Industrial equipment
2
TRKA-10DA14R
MODEL
NUMBER
OUTPUT
VOLTAGE
INPUT
VOLTAGE
MAX. OUTPUT
CURRENT
MAX. OUTPUT
POWER
TYPICAL EFFICIENCY
SLDN-06D1A0
0.45-5.5 VDC
3-14 VDC
6A
33 W
93.8%
93.8%
SLDN-06D1AL
0.45-5.5 VDC
3-14 VDC
6A
33 W
NOTE: 1. Add “R” suffix at the end of the model number to indicate tape and reel packaging (Standard).
2. Add “G” suffix at the end of the model number to indicate tray packaging (Option).
PART NUMBER EXPLANATION
S
LDN
-
06
D
1A
x
Y
RoHS
Status
Series
code
Output
Current
Output
Voltage
With
Mounting Type
Wide input voltage range
Enable
Package Type
L – active Low
0 –active High
G – Tray package
R –tape and reel packaging
Surface mount
6 A
3-14V
sequencing
PARAMETER
DESCRIPTION
MIN
-0.3
-
TYP
MAX
15
UNITS
Continuous non-operating Input Voltage
Voltage on SEQ SYNC VS+
-
-
V
V
7
Voltage on CLK DATA SMBALERT
terminal
-
-
3.6
V
Ambient temperature
Storage Temperature
See Thermal Considerations section
-40
-55
-
-
-
-
85
C
C
m
125
Altitude
2000
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.
All specifications are typical at 25°C unless otherwise stated.
PARAMETER
DESCRIPTION
MIN
TYP
MAX
14.4
5
UNIT
Operating Input Voltage
3
-
V
Input Current (full load)
Input Current (no load)
VIN = 3 V to 14.4 V
-
-
A
Vo = 0.6 V
Vo = 5 V
-
-
30
90
-
-
mA
mA
VIN = 12 VDC, IO = 0, module enabled
VIN = 12.0 VDC, module disabled
Input Stand-by Current
-
6
-
mA
1. 5 Hz to 20 MHz, 1 μH source impedance;
VIN = 0 to 14 V, IO = IO, max
Input Reflected Ripple Current (pk-pk)
-
11.2
-
mA
2. See Test Configurations
I2t Inrush Current Transient
-
-
-
1
-
A2s
dB
Input Ripple Rejection (120Hz)
-55
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 6A. 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.
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3
SLDN-06D1Ax
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
With 0.1% tolerance for external resistor
used to set output voltage
Output Voltage Set Point
-1.0
-
1.0
%Vo, set
Over all operating input voltage, resistive
load, and temperature conditions until end
of life
Output Voltage
-0.3
-
0.3
%Vo, set
Power Management Bus Adjustable
Output Voltage Range
Power Management Bus Output Voltage
Adjustment Step Size
-25
-
0
25
-
%Vo, set
%Vo, set
0.4
1.Some output voltages may not be
possible depending on the input voltage –
see Feature Descriptions Section
2.Selected by an extermal resistor
Adjustment Range
0.6
-
-
-
5.5
0.5
V
V
Remote Sense Range
Load Regulation
VO ≥ 2.5 V
-
-
-
-
10
10
mV
mV
IO=IO, min to IO, max
VO < 2.5 V
-
-
-
-
0.4
5
%Vo, set
mV
Line Regulation
VO ≥ 2.5 V
VO < 2.5 V
VIN=VIN, min to VIN, max
Tref=TA, min to TA, max
-
-
-
0.4
100
38
6
%Vo, set
mV
Temperature Regulation
Ripple and Noise (Pk-Pk)
Ripple and Noise (RMS)
Output Current Range
5Hz to 20MHz BW, VIN=VIN, nom and IO = IO,
min to IO, max Co = 0.1uF // 22 uF ceramic
capacitors)
50
20
-
-
mV
in either sink or source mode
0
-
A
Output Current Limit Inception
Output Short-Circuit Current
Current limit does not operate in sink mode
Vo≤250mV, Hiccup Mode
200
367
-
%Io, max
mArms
-
-
Output Capacitance
ESR≥ 1 mΩ
Without the Tunable LoopTM
With the Tunable LoopTM
With the Tunable LoopTM
22
22
22
-
-
-
47
1000
3000
uF
uF
uF
ESR≥0.15 mΩ
ESR≥ 10 mΩ
Case 1: On/Off input is enabled and then
input power is applied (delay from instant at
-
0.4
-
ms
Turn-On Delay Times
(VIN=VIN, nom, IO=IO, max, VO to within ±1%
of steady state)
which VIN = VIN, min until Vo = 10% of Vo, set
Case 2: Input power is applied for at least
one second and then the On/Off input is
enabled (delay from instant at which
)
-
-
0.8
2.2
-
-
ms
ms
Von/Off is enabled until Vo = 10% of Vo, set
time for Vo to rise from 10% of Vo, set to
90% of Vo, set
)
Output voltage Rise time
Notes:
1. Some output voltages may not be possible depending on the input voltage.
2. External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best
transient response (See the Tunable LoopTM section for details).
3. Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
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Asia-Pacific
Europe, Middle East
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Rev. AE.01.19
4
SLDN-06D1Ax
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
Efficiency
Vo = 0.6 V
Vo = 1.2 V
Vo = 1.8 V
Vo = 2.5 V
Vo = 3.3 V
Vo = 5.0 V
75.6
85.0
88.6
90.6
92.1
93.8
Vin = 12 VDC, TA = 25°C
Io = Io, max, Vo = Vo, set
-
-
%
Switching Frequency
-
510
2.0
-
600
-
720
-
kHz
kHz
V
Synchronization Frequency Range
High-Level Input Voltage
Low-Level Input Voltage
Input Current, SYNC
-
-
-
0.4
100
-
V
-
-
-
nA
ns
ns
℃
Minimum Pulse Width, SYNC
Maximum SYNC rise time
Over Temperature Protection
100
100
-
-
-
150
-
Power Management Bus Over
Temperature Warning Threshold
Power Management Bus Adjustable
Input Under Voltage Lockout Thresholds
Resolution of Adjustable Input Under
Voltage Threshold
-
2.5
-
130
-
℃
V
-
-
14
500
mV
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
-
-
-
2.79
2.58
0.2
-
-
-
V
V
V
Tracking Accuracy
Power-Up: 2V/ms
Power-Down: 2V/ms
-
-
-
-
100
100
mV
mV
Vin, min to Vin, max; Io, min to Io, max, Vseq < Vo
PGOOD (Power Good)
Overvoltage threshold for PGOOD ON
Overvoltage threshold for PGOOD OFF
Undervoltage threshold for PGOOD ON
Undervoltage threshold for PGOOD OFF
Pulldown resistance of PGOOD pin
Sink current capability into PGOOD pin
Weight
-
-
-
-
-
-
-
108
110
92
90
-
-
-
%Vo, set
%Vo, set
%Vo, set
%Vo, set
Ω
Signal Interface Open Drain,
Vsupply 5 VDC
-
-
50
5
-
-
mA
1.65
g
Calculated MTBF (IO=0.8IO, max, TA=40°C)
Telecordia Issue 2 Method 1 Case 3
MTBF
18,595,797
hours
0.48 x 0.48 x 0.29
12.2 x 12.2 x 7.25
in
mm
Dimensions (L × W × H)
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
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SLDN-06D1Ax
DIGITAL INTERFACE SPECIFICATIONS
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
Power Management Bus Signal Interface Characteristics
Input High Voltage (CLK, DATA)
2.1
-
-
-
-
-
3.6
0.8
10
V
V
Input Low Voltage (CLK, DATA)
Input high level current (CLK, DATA)
Input low level current (CLK, DATA)
-10
-10
uA
uA
10
Output Low Voltage
lout = 2 mA
-
-
0.4
V
(CLK, DATA, SMBALERT#)
Output high level open drain leakage
current (DATA, SMBALERT#)
Vout = 3.6 V
0
-
-
0.7
-
10
-
uA
pF
Pin capacitance
Power Management Bus Operating
frequency range
10
400
kHZ
ns
Data setup time
250
0
-
-
-
-
Receive Mode
Data hold time
Transmit Mode
ns
300
Measurement System Characteristics
Read delay time
153
0
192
231
18
-
us
A
Output current measurement range
-
-
Output current measurement resolution
62.5
mA
Output current measurement gain
accuracy
-
-
±5
%
Output current measurement offset
-
0
-
0.1
5.5
-
A
V
VOUT measurement range
-
VOUT measurement resolution
VOUT measurement gain accuracy
VOUT measurement offset
-
15.625
mA
%
-15
-3
3
-
15
3
-
%
VIN measurement range
-
14.4
-
V
VIN measurement resolution
VIN measurement gain accuracy
VIN measurement offset
-
32.5
mV
%
-15
-5.5
-
-
15
1.4
LSB
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6
SLDN-06D1Ax
95
90
85
80
75
70
65
60
55
50
85
80
75
70
65
60
55
50
Vin=3.3V
Vin=3.3V
Vin=14V
Vin=14V
Vin=12V
Vin=12V
0
1
2
3
4
5
6
0
1
2
3
4
5
6
OUTPUT CURRENT, IO (A)
Vo=0.6V
OUTPUT CURRENT, IO (A)
Vo=1.2V
95
95
90
85
80
75
70
90
85
80
75
70
Vin=4.5V
Vin=3.3V
Vin=14V
Vin=14V
Vin=12V
Vin=12V
0
1
2
3
4
5
6
0
1
2
3
4
5
6
OUTPUT CURRENT, IO (A)
Vo=1.8V
OUTPUT CURRENT, IO (A)
Vo=2.5V
100
95
90
85
80
75
70
100
95
90
85
80
75
70
Vin=4.5V
Vin=7V
Vin=14V
Vin=14V
Vin=12V
Vin=12V
0
1
2
3
4
5
6
0
1
2
3
4
5
6
OUTPUT CURRENT, IO (A)
Vo=3.3V
OUTPUT CURRENT, IO (A)
Vo=5.0V
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SLDN-06D1Ax
6.0
5.0
6.0
5.0
4.0
3.0
2.0
1.0
NC
NC
100
200
NC
100
200
NC
Standard Part
(85°C)
2m/s
(400LFM)
300
2m/s
(400LFM)
Standard Part
(85°C)
4.0
3.0
2.0
1.0
300
400
400
NC
100
200
Ruggedized (D)
Part (105°C)
NC
300
100
200
Ruggedized (D)
Part (105°C)
300
400
400
AMBIENT TEMPERATURE, TA OC
Vo=0.6V
AMBIENT TEMPERATURE, TA OC
Vo=1.2V
6.0
5.0
4.0
3.0
2.0
1.0
6.0
5.0
4.0
3.0
2.0
1.0
100
NC
300
NC
Standard Part
(85°C)
200
NC
100
200
NC
2m/s
400
(400LFM)
Standard Part
(85°C)
300
400
2m/s
(400LFM)
100
200
NC
NC
100
Ruggedized (D)
Part (105°C)
Ruggedized (D)
Part (105°C)
300
300
200
400
400
AMBIENT TEMPERATURE, TA OC
Vo=1.8V
AMBIENT TEMPERATURE, TA OC
Vo=2.5V
6.0
5.0
4.0
3.0
2.0
1.0
6.0
5.0
4.0
3.0
2.0
1.0
100
100
NC
200
NC
300
NC
300
NC
Standard
200
Part (85°C)
Standard
400
400
Part (85°C)
2m/s
(400LFM)
0.5m/s
(100LFM)
NC
100
200
Ruggedized (D)
Part (105°C)
NC 100
300 200
400
Ruggedized (D)
Part (105°C)
300
400
AMBIENT TEMPERATURE, TA OC
Vo=3.3V
AMBIENT TEMPERATURE, TA OC
Vo=5.0V
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SLDN-06D1Ax
TIME, t (1s/div)
TIME, t (1s/div)
Vo=0.6V, Io = Io, max
Vo=1.2V, Io = Io, max
TIME, t (1s/div)
TIME, t (1s/div)
Vo=1.8V, Io = Io, max
Vo=2.5V, Io = Io, max
TIME, t (1s/div)
TIME, t (1s/div)
Vo=3.3V, Io = Io, max
Vo=5.0V, Io = Io, max
Notes: CO=22μF ceramic, VIN = 12V
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SLDN-06D1Ax
TIME, t (1s/div)
TIME, t (1s/div)
Vo=0.6V, Io = Io,max
Vo=1.2V, Io = Io,max
TIME, t (1s/div)
TIME, t (1s/div)
Vo=1.8V, Io = Io,max
Vo=2.5V, Io = Io,max
TIME, t (1s/div)
TIME, t (1s/div)
Vo=3.3V, Io = Io,max
Vo=5.0V, Io = Io,max
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Asia-Pacific
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10
SLDN-06D1Ax
TIME, t (20s /div)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 50% to
100% at 12Vin, Cout=1x47uF + 4x330uF, CTune=33nF,
RTune=178. Vo=0.6V
Transient Response to Dynamic Load Change from 50% to
100% at 12Vin, Cout=1x47uF + 2x330uF, CTune=12nF,
RTune=178. Vo=1.2V
TIME, t (20s /div)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 50% to
100% at 12Vin, Cout= 1x47uF + 1x330uF, CTune=4700pF,
RTune=178. Vo=1.8V
Transient Response to Dynamic Load Change from 50% to
100% at 12Vin, Cout=3x47uF, CTune=3300pF, RTune=178.
Vo=2.5V
TIME, t (20s /div)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 50% to
100% at 12Vin, Cout= 3x47uF, CTune=3300pF, RTune=178.
Vo=3.3V
Transient Response to Dynamic Load Change from 50% to
100% at 12Vin, Cout=2x47uF, CTune=2200pF, RTune=261.
Vo=5.0V
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SLDN-06D1Ax
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io, max), Vo=0.6V
Start-up Using On/Off Voltage (Io = Io, max, Vo=1.2V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io, max), Vo=1.8V
Start-up Using On/Off Voltage (Io = Io, max), Vo=2.5V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io, max), Vo=3.3V
Start-up Using On/Off Voltage (Io = Io, max), Vo=5.0V
North America
Asia-Pacific
Europe, Middle East
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12
SLDN-06D1Ax
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io, max),
Vo=0.6V
Start-up Using Input Voltage (VIN = 12V, Io = Io, max),
Vo=1.2V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io, max),
Vo=1.8V
Start-up Using Input Voltage (VIN = 12V, Io = Io, max),
Vo=2.5V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io, max),
Vo=3.3V
Start-up Using Input Voltage (VIN = 12V, Io = Io, max),
Vo=5.0V
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SLDN-06D1Ax
The SLDN-06D1Ax module should be connected to a low ac-impedance source. A highly inductive source can affect the stability
of the module. An input capacitance 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, ceramic capacitors are recommended at the input of the module. Figure 37 shows the input ripple
voltage for various output voltages at 6A of load current with 1x22 µF or 2x22 µF ceramic capacitors and an input of 12 V.
Figure 37
Note: Input ripple voltage for various output voltages with 1x22 µF or 2x22 µF ceramic capacitors at the input (6 A load). Input voltage is 12
V.
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Rev. AE.01.19
14
SLDN-06D1Ax
These modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 µF ceramic
and 22 µF ceramic capacitors at the output of the module. 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 polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 38
provides output ripple information for different external capacitance values at various Vo and a full load current of 6A. 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 LoopTM feature described later in this
data sheet.
Figure 38
Note: Output ripple voltage for various output voltages with external 1x22 µF, 1x47 µF, or 2x47 µF ceramic capacitors at the output (6A
load). Input voltage is 12 V.
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 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805 Teil 1
+ A11):2009-11; EN 60950-1:2006 + A11:2009-03.
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 fuse with a maximum rating of 10 A in the positive input lead.
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SLDN-06D1Ax
PARAMETER
DESCRIPTION
MIN
-0.2
2.0
TYP
MAX
0.6
UNIT
Signal Low (Unit On)
Active Low
Signal High (Unit Off)
-
-
-
-
V
V
V
V
The remote on/off pin open, Unit on
Vin, max
0.6
Signal Low (Unit Off)
Active High
Signal High (Unit On)
-0.2
2.0
The remote on/off pin open, Unit on
Vin, max
The SLDN-06D1Ax module can be turned ON and OFF either by using the ON/OFF pin (Analog interface) or through the Power
Management Bus interface (Digital). The module can be configured in a number of ways through the Power Management Bus
interface to react to the two ON/OFF inputs:
Module ON/OFF can be controlled only through the analog interface (digital interface ON/OFF commands are ignored).
Module ON/OFF can be controlled only through the Power Management Bus interface (analog interface is ignored).
Module ON/OFF can be controlled by either the analog or digital interface.
The default state of the module (as shipped from the factory) is to be controlled by the analog interface only. If the digital interface
is to be enabled, or the module is to be controlled only through the digital interface, this change must be made through the Power
Management Bus. These changes can be made and written to non-volatile memory on the module so that it is remembered for
subsequent use.
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The SLDN-06D1Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the
Positive Logic On/Off option, (device code suffix “0” – see Ordering Information), the module turns ON during a logic High on the
On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off option, (device code suffix “L” – see Ordering
Information), the module turns OFF during logic High and ON during logic Low. The On/Off signal should be always referenced to
ground. For either On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present.
For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 39. When the external transistor Q2
is in the OFF state, the internal transistor Q1 is turned ON, and the internal PWM #Enable signal is pulled low causing the module
to be ON. When transistor Q2 is turned ON, the On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is
20k .
For negative logic On/Off modules, the circuit configuration is shown in Fig. 40. The On/Off pin should be pulled high with an
external pull-up resistor (suggested value for the 3V to 14V input range is 20Kohms). When transistor Q2 is in the OFF state, the
On/Off pin is pulled high, transistor Q1 is turned ON and the module is OFF. To turn the module ON, Q2 is turned ON pulling the
On/Off pin low, turning transistor Q1 OFF resulting in the PWM Enable pin going high.
DLYNX MODULE
DLYNX MODULE
+3.3V
+3.3V
+VIN
+VIN
Rpullup
I
Rpullup
I
10K
ENABLE
10K
ENABLE
ON/OFF
22K
22K
ON/OFF
Q1
Q1
+
+
Q2
Q2
V
22K
V
22K
ON/OFF
ON/OFF
_
_
GND
GND
Figure 39
Circuit configuration for using positive On/Off logic
Figure 40
Circuit configuration for using negative On/Off logic
Please see the Digital Feature Descriptions section.
The SLDN-06D1Ax module has monotonic start-up and shutdown behavior for any combination of rated input voltage, output
current and operating temperature range.
The SLDN-06D1Ax module can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage.
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SLDN-06D1Ax
The output voltage of the module is programmable to any voltage from 0.6dc to 5.5Vdc by connecting a resistor between the Trim
and SIG_GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These
are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 41. The Upper Limit curve shows that for output
voltages lower than 1V, the input voltage must be lower than the maximum of 14.4V. The Lower Limit curve shows that for output
voltages higher than 0.6V, the input voltage needs to be larger than the minimum of 3V.
Figure 41
Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages.
VIN(+)
VO(+)
VS+
ON/OFF
LOAD
TRIM
Rtrim
SIG_GND
VS─
Figure 42
CAUTION: Do not connect SIG_GND to GND elsewhere in the layout Circuit configuration for programming output voltage using an
external resistor.
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Without an external resistor between Trim and SIG_GND pins, the output of the module will be 0.6Vdc.To calculate the value of the
trim resistor, Rtrim for a desired output voltage, should be as per the following equation:
12
Vo − 0.6
Rtrim =
k
Rtrim is the external resistor in KΩ
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some common output voltages.
Table 1
RTRIM (KΩ)
Open
40
VO, SET (V)
0.6
0.9
1.0
1.2
1.5
1.8
2.5
3.3
5.0
30
20
13.33
10
6.316
4.444
2.727
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
Please see the Digital Feature Descriptions section.
The SLDN-06D1Ax power module has a Remote Sense feature to minimize the effects of distribution losses by regulating the
voltage between the sense pins (VS+ and VS-). The voltage drop between the sense pins and the VOUT and GND pins of the
module should not exceed 0.5 V.
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SLDN-06D1Ax
Output voltage margining can be implemented in the module 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. Figure 43 shows the circuit configuration for output voltage margining. Please consult your local Bel Power technical
representative for additional details.
Vo
Rmargin-down
MODULE
Q2
Trim
Rmargin-up
Rtrim
Q1
SIG_GND
Figure 43
Circuit Configuration for margining Output voltage
Please see the Digital Feature Descriptions section.
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The SLDN-06D1Ax module includes a sequencing feature, EZ-SEQUENCE 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, leave it unconnected.
The voltage applied to the SEQ pin should be scaled down by the same ratio as used to scale the output voltage down to the
reference voltage of the module. This is accomplished by an external resistive divider connected across the sequencing voltage
before it is fed to the SEQ pin as shown in Fig. 44. In addition, a small capacitor (suggested value 100pF) should be connected
across the lower resistor R1.
For SLDN-06D1x modules, the minimum recommended delay between the ON/OFF signal and the sequencing signal is 10ms to
ensure that the module output is ramped up according to the sequencing signal. This ensures that the module soft-start routine is
completed before the sequencing signal is allowed to ramp up.
DLynx Module
V
SEQ
20K
SEQ
R1=Rtrim
SIG_GND
100 pF
Figure 44
Circuit showing connection of the sequencing signal to the SEQ pin
When the scaled down sequencing 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 sequencing voltage must be set higher than the set-point voltage of the module. The
output voltage follows the sequencing voltage 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.
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.
Note that in all digital Bel series of modules, the Power Management Bus Output Undervoltage Fault will be tripped when
sequencing is employed. This will be detected using the STATUS_WORD and STATUS_VOUT Power Management Bus commands.
In addition, the SMBALERT# signal will be asserted low as occurs for all faults and warnings. To avoid the module shutting down
due to the Output Undervoltage Fault, the module must be set to continue operation without interruption as the response to this
fault (see the description of the Power Management Bus command VOUT_UV_FAULT_RESPONSE for additional information).
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SLDN-06D1Ax
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.
Please see the Digital Feature Descriptions section.
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shut down if the
overtemperature threshold of 150oC(typ) is exceeded at the thermal reference point Tref .Once the unit goes into thermal shutdown
it will then wait to cool before attempting to restart.
Please see the Digital Feature Descriptions section.
Please see the Digital Feature Descriptions section.
At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at
an input voltage above the undervoltage lockout turn-on threshold.
Please see the Digital Feature Descriptions section.
Please see the Digital Feature Descriptions section.
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The SLDN-06D1Ax module switching frequency can be synchronized to a signal with an external frequency within a specified range.
Synchronization can be done by using the external signal applied to the SYNC pin of the module as shown in Fig. 45, with the converter
being synchronized by the rising edge of the external signal. The Electrical Specifications table specifies the requirements of the
external SYNC signal. If the SYNC pin is not used, the module should free run at the default switching frequency. If synchronization is
not being used, connect the SYNC pin to GND.
MODULE
SYNC
+
─
GND
Figure 45
External source connections to synchronize switching frequency of the module.
Please see the Digital Feature Descriptions section.
Identical dimensions and pin layout of Analog and Digital modules permit migration from one to the other without needing to change
the layout. To support this, 2 separate Trim Resistor locations have to be provided in the layout. As shown in Fig. 46, for the digital
modules, the resistor is connected between the TRIM pad and SGND and in the case of the analog module it is connected between
TRIM and GND.
MODULE
TRIM
Rtrim1 for
Digital
Rtrim2 for
Analog
(PVX006 / PDT006)
SIG_GND
GND(Pin 7)
Figure 46
Caution: For digital modules, do not connect SIG_GND to GND elsewhere in the layout
Layout to support either Analog or Digital on the same pad
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SLDN-06D1Ax
The SLDN-06D1Ax has a 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 (see Figure
38) 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 VS+ and TRIM pins of the module, as
shown in Fig. 47. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.
VOUT
VS+
RTune
CO
MODULE
CTune
TRIM
RTrim
SIG_GND
GND
Figure 47
Circuit diagram showing connection of RTUME 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 3 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 3 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 6A to 6A step change (50% of full load), with an input voltage of 12V.
Please contact your Bel Power technical representative to obtain more details of this feature as well as for guidelines on how to
select the right value of external R-C to tune the module for best transient performance and stable operation for other output
capacitance values.
Co
1x47F
330
2x47F
270
4x47F
220
6x47F
180
10x47F
180
RTUNE
CTUNE
680pF
1800pF
3300pF
4700pF
5600pF
Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 3A step load with Vin=12V.
Vo
Co
5V
3.3V
2.5V
1.8V
1.2V
0.6V
2x330F
Polymer
4x330F
Polymer
2x47F
3x47F
3x47F
1x330F
RTUNE
CTUNE
V
270
180
180
180
180
12nF
18mV
180
33nF
10mV
2200pF
76mV
3300pF
48mV
3300pF
47mV
4700pF
33mV
Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 3A step load with Vin=12V
Note: The capacitors used in the Tunable Loop tables are 47 μF/3 mΩ ESR ceramic and 330 μF/12 mΩ ESR polymer capacitors.
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The SLDN-06D1Ax modules have a Power Management Bus interface that supports both communication and control. The
Power Management Bus Power Management Protocol Specification can be obtained from www.Power Management
Bus.org. The modules support a subset of version 1.1 of the specification (see Table 6 for a list of the specific commands
supported). Most module parameters can be programmed using Power Management Bus and stored as defaults for later
use.
All communication over the module Power Management Bus interface must support the Packet Error Checking (PEC)
scheme. The Power Management Bus master must generate the correct PEC byte for all transactions, and check the PEC
byte returned by the module.
The module also supports the SMBALERT response protocol whereby the module can alert the bus master if it wants to
talk. For more information on the SMBus alert response protocol, see the System Management Bus (SMBus) specification.
The module has non-volatile memory that is used to store configuration settings. Not all settings programmed into the
device are automatically saved into this non-volatile memory, only those specifically identified as capable of being stored
can be saved (see Table 6 for which command parameters can be saved to non-volatile storage).
For commands that set thresholds, voltages or report such quantities, the module supports the “Linear” data format among
the three data formats supported by Power Management Bus. The Linear Data Format is a two byte value with an 11-bit,
two’s complement mantissa and a 5-bit, two’s complement exponent. The format of the two data bytes is shown below:
Data Byte High
Data Byte Low
7 6 5 4 3
2 1 0 7 6 5 4 3 2 1 0
Exponent
MSB
Mantissa
MSB
The value is of the number is then given by
Value = Mantissa x 2 Exponent
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SLDN-06D1Ax
The SLDN-06D1Ax module can be addressed through the Power Management Bus using a device address. The module has 64
possible addresses (0 to 63 in decimal) which can be set using resistors connected from the ADDR0 and ADDR1 pins to SIG_GND.
Note that some of these addresses (0, 1, 2, 3, 4, 5, 6, 7, 8, 12, 40 in decimal) are reserved according to the SMBus specifications
and may not be useable. The address is set in the form of two octal (0 to 7) digits, with each pin setting one digit. The ADDR1 pin
sets the high order digit and ADDR0 sets the low order digit. The resistor values suggested for each digit are shown in Table 4 (1%
tolerance resistors are recommended). Note that if either address resistor value is outside the range specified in Table 4, the module
will respond to address 127.
RESISTOR VALUE (KΩ)
DIGIT
0
1
2
3
4
5
6
7
10
15.4
23.7
36.5
54.9
84.5
130
200
Table 4
The user must know which I2C addresses are reserved in a system for special functions and set the address of the module to avoid
interfering with other system operations. Both 100kHz and 400kHz bus speeds are supported by the module. Connection for the
Power Management Bus interface should follow the High Power DC specifications given in section 3.1.3 in the SMBus specification
V2.0 for the 400kHz bus speed or the Low Power DC specifications in section 3.1.2. The complete SMBus specification is available
from the SMBus web site, smbus.org.
ADDR1
ADDR0
RADDR0
RADDR1
SIG_GND
Figure 48
Circuit showing connection of resistors used to set the Power Management Bus address of the module.
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The module can also be turned on and off via the Power Management Bus interface. The OPERATION command is used
to actually turn the module on and off via the Power Management Bus, while the ON_OFF_CONFIG command configures
the combination of analog ON/OFF pin input and Power Management Bus commands needed to turn the module on and
off. Bit [7] in the OPERATION command data byte enables the module, with the following functions:
0: Output is disabled
1: Output is enabled
This module uses the lower five bits of the ON_OFF_CONFIG data byte to set various ON/OFF options as follows:
BIT POSITION
Access
4
r/w
PU
1
3
r/w
CMD
0
2
r/w
CPR
1
1
r/w
POL
1
0
r
Function
CPA
1
Default Value
PU: Sets the default to either operate any time input power is present or for the ON/OFF to be controlled by the analog
ON/OFF input and the Power Management Bus OPERATION command. This bit is used together with the CP, CMD and
ON bits to determine startup.
BIT VALUE
ACTION
0
Module powers up any time power is present regardless of state of the analog ON/OFF pin
Module does not power up until commanded by the analog ON/OFF pin and the OPERATION
command as programmed in bits [2:0] of the ON_OFF_CONFIG register.
1
CMD: The CMD bit controls how the device responds to the OPERATION command.
BIT VALUE
ACTION
0
1
Module ignores the ON bit in the OPERATION command
Module responds to the ON bit in the OPERATION command
CPR: Sets the response of the analog ON/OFF pin. This bit is used together with the CMD, PU and ON bits to determine
startup.
BIT VALUE
ACTION
Module ignores the analog ON/OFF pin, i.e. ON/OFF is only controlled through the POWER
MANAGEMENT BUS via the OPERATION command
0
1
Module requires the analog ON/OFF pin to be asserted to start the unit
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SLDN-06D1Ax
The soft start rise time can be adjusted in the module via Power Management Bus. When setting this parameter, make
sure that the charging current for output capacitors can be delivered by the module in addition to any load current to avoid
nuisance tripping of the overcurrent protection circuitry during startup. The TON_RISE command sets the rise time in ms,
and allows choosing soft start times between 600μs and 9ms, with possible values listed in Table 5. Note that the exponent
is fixed at -4 (decimal) and the upper two bits of the mantissa are also fixed at 0.
RISE TIME
600 μs
900 μs
1.2 ms
1.8 ms
2.7 ms
4.2 ms
6.0 ms
9.0 ms
EXPONENT
11100
MANTISSA
00000001010
00000001110
00000010011
00000011101
00000101011
00001000011
00001100000
00010010000
11100
11100
11100
11100
11100
11100
11100
Table 5
The VOUT_SCALE_LOOP parameter is important for a number of Power Management Bus commands related to output
voltage trimming, margining, over/under voltage protection and the PGOOD thresholds. The output voltage of the module
is set as the combination of the voltage divider formed by RTrim and a 20kΩ upper divider resistor inside the module, and
the internal reference voltage of the module. The reference voltage VREF is nominally set at 600mV, and the output
regulation voltage is then given by.
20000+ RTrim
VOUT
=
VREF
RTrim
Hence the module output voltage is dependent on the value of RTrim which is connected external to the module. The
information on the output voltage divider ratio is conveyed to the module through the VOUT_SCALE_LOOP parameter
which is calculated as follows:
RTrim
VOUT _ SCALE _ LOOP =
20000+ RTrim
The VOUT_SCALE_LOOP parameter is specified using the “Linear” format and two bytes. The upper five bits [7:3] of the
high byte are used to set the exponent which is fixed at –9 (decimal). The remaining three bits of the high byte [2:0] and
the eight bits of the lower byte are used for the mantissa. The default value of the mantissa is 00100000000 corresponding
to 256 (decimal), corresponding to a divider ratio of 0.5. The maximum value of the mantissa is 512 corresponding to a
divider ratio of 1. Note that the resolution of the VOUT_SCALE_LOOP command is 0.2%.
When Power Management Bus commands are used to trim or margin the output voltage, the value of VREF is what is
changed inside the module, which in turn changes the regulated output voltage of the module.
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The nominal output voltage of the module can be adjusted with a minimum step size of 0.4% over a ±25% range from
nominal using the VOUT_TRIM command over the Power Management Bus.
The VOUT_TRIM command is used to apply a fixed offset voltage to the output voltage command value using the “Linear”
mode with the exponent fixed at –10 (decimal). The value of the offset voltage is given by.
VOUT (offset ) = VOUT _TRIM 2−10
This offset voltage is added to the voltage set through the divider ratio and nominal VREF to produce the trimmed output
voltage. The valid range in two’s complement for this command is –4000h to 3FFFh. The high order two bits of the high
byte must both be either 0 or 1. If a value outside of the +/-25% adjustment range is given with this command, the module
will set it’s output voltage to the nominal value (as if VOUT_TRIM had been set to 0), assert SMBALRT#, set the CML bit
in STATUS_BYTE and the invalid data bit in STATUS_CML.
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SLDN-06D1Ax
The module can also have its output voltage margined via Power Management Bus commands. The command
VOUT_MARGIN_HIGH sets the margin high voltage, while the command VOUT_MARGIN_LOW sets the margin low
voltage. Both the VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands use the “Linear” mode with the exponent
fixed at –10 (decimal). Two bytes are used for the mantissa with the upper bit [7] of the high byte fixed at 0. The actual
margined output voltage is a combination of the VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW and the VOUT_TRIM
values as shown below:
VOUT (MH )
=
(VOUT _ MARGIN _ HIGH +VOUT _TRIM ) 2−10
VOUT (ML)
=
(VOUT _ MARGIN _ LOW + VOUT _TRIM ) 2−10
Note that the sum of the margin and trim voltages cannot be outside the ±25% window around the nominal output voltage.
The data associated with VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW can be stored to non-volatile memory using
the STORE_DEFAULT_ALL command.
The module is commanded to go to the margined high or low voltages using the OPERATION command. Bits [5:2] are
used to enable margining as follows:
00XX: Margin Off
0101: Margin Low (Ignore Fault)
0110: Margin Low (Act on Fault)
1001: Margin High (Ignore Fault)
1010: Margin High (Act on Fault)
The SLDN-06D1Ax module can provide an overcurrent warning via the Power Management Bus. The threshold for the
overcurrent warning can be set using the parameter IOUT_OC_WARN_LIMIT. This command uses the “Linear” data format
with a two byte data word where the upper five bits [7:3] of the high byte represent the exponent and the remaining three
bits of the high byte [2:0] and the eight bits in the low byte represent the mantissa. The exponent is fixed at –1 (decimal).
The upper six bits of the mantissa are fixed at 0 while the lower five bits are programmable with a default value of 7A. The
resolution of this warning limit is 500mA. The value of the IOUT_OC_WARN_LIMIT can be stored to non-volatile memory
using the STORE_DEFAULT_ALL command.
The SLDN-06D1Ax module can provide information related to temperature of the module through the
STATUS_TEMPERATURE command. The command returns information about whether the pre-set over temperature fault
threshold and/or the warning threshold have been exceeded.
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The SLDN-06D1Ax module can provide information related to temperature of the module through the
STATUS_TEMPERATURE command. The command returns information about whether the pre-set over temperature fault
threshold and/or the warning threshold have been exceeded.
VOUT (OV _ REQ ) = (VOUT _ OV _ FAULT _ LIMIT) 2−10
VOUT (UV _ REQ ) = (VOUT _UV _ FAULT _ LIMIT) 2−10
Values within the supported range for over and undervoltage detection thresholds will be set to the nearest fixed
percentage. Note that the correct value for VOUT_SCALE_LOOP must be set in the module for the correct over or under
voltage trip points to be calculated.
In addition to adjustable output voltage protection, the 6A Digital module can also be programmed for the response to the
fault. The VOUT_OV_FAULT RESPONSE and VOUT_UV_FAULT_RESPONSE commands specify the response to the fault.
Both these commands use a single data byte with the possible options as shown below.
•
•
Continue operation without interruption (Bits [7:6] = 00, Bits [5:3] = xxx).
Continue for four switching cycles and then shut down if the fault is still present, followed by no restart or continuous
restart (Bits [7:6] = 01, Bits [5:3] = 000 means no restart, Bits [5:3] = 111 means continuous restart).
Immediate shut down followed by no restart or continuous restart (Bits [7:6] = 10, Bits [5:3] = 000 means no restart,
Bits [5:3] = 111 means continuous restart).
•
•
Module output is disabled when the fault is present and the output is enabled when the fault no longer exists (Bits
[7:6] = 11, Bits [5:3] = xxx).
Note: That separate response choices are possible for output over voltage or under voltage faults.
The SLDN-06D1Ax module allows adjustment of the input under voltage lockout and hysteresis. The command VIN_ON
allows setting the input voltage turn on threshold, while the VIN_OFF command sets the input voltage turn off threshold.
For the VIN_ON command, possible values are 2.75V, and 3V to 14V in 0.5V steps. For the VIN_OFF command, possible
values are 2.5V to 14V in 0.5V steps. If other values are entered for either command, they will be mapped to the closest of
the allowed values.
VIN_ON must be set higher than VINPOWER MANAGEMENT BUS _OFF. Attempting to write either VIN_ON lower than
VIN_OFF or VIN_OFF higher than VIN_ON results in the new value being rejected, SMBALERT being asserted along with
the CML bit in STATUS_BYTE and the invalid data bit in STATUS_CML.
Both the VIN_ON and VIN_OFF commands use the “Linear” format with two data bytes. The upper five bits represent the
exponent (fixed at -2) and the remaining 11 bits represent the mantissa. For the mantissa, the four most significant bits
are fixed at 0.
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SLDN-06D1Ax
The SLDN-06D1Ax module provides a Power Good (PGOOD) signal that is implemented with an open-drain output to
indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted
to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the
output voltage going outside the specified thresholds. The PGOOD thresholds are user selectable via the Power
Management Bus (the default values are as shown in the Feature Specifications Section). Each threshold is set up
symmetrically above and below the nominal value. The POWER_GOOD_ON command sets the output voltage level above
which PGOOD is asserted (lower threshold). For example, with a 1.2V nominal output voltage, the POWER_GOOD_ON
threshold can set the lower threshold to 1.14 or 1.1V. Doing this will automatically set the upper thresholds to 1.26 or 1.3V.
The POWER_GOOD_OFF command sets the level below which the PGOOD command is de-asserted. This command also
sets two thresholds symmetrically placed around the nominal output voltage. Normally, the POWER_GOOD_ON threshold
is set higher than the POWER_GOOD_OFF threshold.
Both POWER_GOOD_ON and POWER_GOOD_OFF commands use the “Linear” format with the exponent fixed at –10
(decimal). The two thresholds are given by:
VOUT (PGOOD _ ON ) = (POWER _ GOOD _ ON) 2−10
VOUT (PGOOD _ OFF ) = (POWER _ GOOD _ OFF) 2−10
Both commands use two data bytes with bit [7] of the high byte fixed at 0, while the remaining bits are r/w and used to set
the mantissa using two’s complement representation. Both commands also use the VOUT_SCALE_LOOP parameter so it
must be set correctly. The default value of POWER_GOOD_ON is set at 1.1035V and that of the POWER_GOOD_OFF is
set at 1.08V. The values associated with these commands can be stored in non-volatile memory using the
STORE_DEFAULT_ALL command.
The PGOOD terminal can be connected through a pullup resistor (suggested value 100 K) to a source of 5VDC or lower.
The SLDN-06D1Ax module is capable of measuring key module parameters such as output current and voltage and input
voltage and providing this information through the Power Management Bus interface. Roughly every 200μs, the module
makes 16 measurements each of output current, voltage and input voltage. Average values of these 16 measurements are
then calculated and placed in the appropriate registers. The values in the registers can then be read using the Power
Management Bus interface.
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The module measures current by using the inductor winding resistance as a current sense element. The inductor winding
resistance is then the current gain factor used to scale the measured voltage into a current reading. This gain factor is the
argument of the IOUT_CAL_GAIN command, and consists of two bytes in the linear data format. The exponent uses the
upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –15 (decimal). The remaining 11 bits
in two’s complement binary format represent the mantissa.
The current measurement accuracy is also improved by each module being calibrated during manufacture with the offset
in the current reading. The IOUT_CAL_OFFSET command is used to store and read the current offset. The argument for
this command consists of two bytes composed of a 5-bit exponent (fixed at -4d) and a 11-bit mantissa. This command
has a resolution of 62.5mA and a range of -4000mA to +3937.5mA. During manufacture, each module is calibrated by
measuring and storing the current gain factor and offset into non-volatile storage.
The READ_IOUT command provides module average output current information. This command only supports positive or
current sourced from the module. If the converter is sinking current a reading of 0 is provided. The READ_IOUT command
returns two bytes of data in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-
s complement format and is fixed at –4 (decimal). The remaining 11 bits in two’s complement binary format represent the
mantissa with the 11th bit fixed at 0 since only positive numbers are considered valid.
Note that the current reading provided by the module is not corrected for temperature. The temperature corrected current
reading for module temperature TModule can be estimated using the following equation.
Where IOUT_CORR is the temperature corrected value of the current measurement, IREAD_OUT is the module current
measurement value, TIND is the temperature of the inductor winding on the module. Since it may be difficult to measure
TIND, it may be approximated by an estimate of the module temperature.
Measuring Output Voltage Using the Power Management Bus
The SLDN-06D1Ax module can provide output voltage information using the READ_VOUT command. The command
returns two bytes of data all representing the mantissa while the exponent is fixed at -10 (decimal).
During manufacture of the module, offset and gain correction values are written into the non-volatile memory of the module.
The command VOUT_CAL_OFFSET can be used to read and/or write the offset (two bytes consisting of a 16-bit mantissa
in two’s complement format) while the exponent is always fixed at -10 (decimal). The allowed range for this offset correction
is -125 to 124mV. The command VOUT_CAL_GAIN can be used to read and/or write the gain correction - two bytes
consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125V to
+0.121V, with a resolution of 0.004V. The corrected output voltage reading is then given by:
VOUT (Final) =
[VOUT (Initial) (1+VOUT _ CAL _ GAIN )]
+VOUT _ CAL _ OFFSET
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SLDN-06D1Ax
The SLDN-06D1Ax module can provide output voltage information using the READ_VIN command. The command returns
two bytes of data in the linear format. The upper five bits [7:3] of the high data form the two’s complement representation
of the mantissa which is fixed at –5 (decimal). The remaining 11 bits are used for two’s complement representation of the
mantissa, with the 11th bit fixed at zero since only positive numbers are valid.
During module manufacture, offset and gain correction values are written into the non-volatile memory of the module. The
command VIN_CAL_OFFSET can be used to read and/or write the offset - two bytes consisting of a five-bit exponent
(fixed at -5) and a11-bit mantissa in two’s complement format. The allowed range for this offset correction is -2 to 1.968V,
and the resolution is 32mV. The command VIN_CAL_GAIN can be used to read and/or write the gain correction - two
bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125V to
+0.121V with a resolution of 0.004V. The corrected output voltage reading is then given by:
VIN (Final) =
[VIN (Initial) (1+VIN _ CAL _ GAIN )]
+VIN _ CAL _ OFFSET
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The SLDN-06D1Ax module supports a number of status information commands implemented in Power Management Bus.
However, not all features are supported in these commands. A 1 in the bit position indicates the fault that is flagged.
STATUS_BYTE: Returns one byte of information with a summary of the most critical device faults.
DEFAULT
VALUE
BIT POSITION
FLAG
7
6
5
4
3
2
1
0
X
0
OFF
0
0
0
0
0
0
0
VOUT Overvoltage
IOUT Overcurrent
VIN Undervoltage
Temperature
CML (Comm. Memory Fault)
None of the above
STATUS_WORD: Returns two bytes of information with a summary of the module’s fault/warning conditions.
Low Byte
DEFAULT
VALUE
BIT POSITION
FLAG
7
6
5
4
3
2
X
0
0
0
0
0
0
OFF
VOUT Overvoltage
IOUT Overcurrent
VIN Undervoltage
Temperature
1
0
CML (Comm. Memory Fault)
None of the above
0
0
High Byte
FLAG
DEFAULT
VALUE
BIT POSITION
7
6
5
4
3
2
1
0
VOUT fault or warning
0
0
0
0
0
0
0
0
IOUT fault or warning
X
X
POWER_GOOD# (is negated)
X
X
X
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SLDN-06D1Ax
STATUS_VOUT: Returns one byte of information relating to the status of the module’s output voltage related faults.
DEFAULT
VALUE
BIT POSITION
FLAG
7
6
5
4
3
2
1
0
VOUT OV Fault
0
X
0
0
0
0
0
0
0
X
VOUT UV Fault
X
X
X
X
STATUS_IOUT: Returns one byte of information relating to the status of the module’s output voltage related faults.
DEFAULT
VALUE
BIT POSITION
FLAG
7
6
5
4
3
2
1
0
IOUT OC Fault
DEFAULT VALUE
X
0
0
0
0
0
0
0
IOUT OC Warning
X
X
X
X
X
STATUS_TEMPERATURE: Returns one byte of information relating to the status of the module’s temperature related faults.
DEFAULT
VALUE
BIT POSITION
FLAG
7
6
5
4
3
2
1
0
OT Fault
0
OT Warning
0
0
0
0
0
0
0
X
X
X
X
X
X
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STATUS_CML: Returns one byte of information relating to the status of the module’s communication related faults.
DEFAULT
VALUE
BIT POSITION
FLAG
7
6
5
4
3
2
1
0
Invalid/Unsupported Command
0
0
0
0
0
0
0
0
Invalid/Unsupported Command
Packet Error Check Failed
X
X
X
Other Communication Fault
X
MFR_VIN_MIN: Returns minimum input voltage as two data bytes of information in Linear format (upper five bits are exponent –
fixed at -2, and lower 11 bits are mantissa in two’s complement format – fixed at 12).
MFR_VOUT_MIN: Returns minimum output voltage as two data bytes of information in Linear format (upper five bits are exponent
– fixed at -10, and lower 11 bits are mantissa in two’s complement format – fixed at 614).
MFR_SPECIFIC_00: Returns information related to the type of module and revision number. Bits [7:2] in the Low Byte indicate the
module type (000110 corresponds to the SLDN-06D1Ax series of module), while bits [7:3] indicate the revision number of the
module.
Low Byte
BIT POSITION
FLAG
DEFAULT VALUE
7:2
1:0
Module Name
Reserved
000110
10
High Byte
BIT POSITION
FLAG
Module Revision Number
Reserved
DEFAULT VALUE
7:3
2:0
None
000
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SLDN-06D1Ax
Please refer to the Power Management Bus 1.1 specification for more details of these commands.
Table 6
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SLDN-06D1Ax
The SLDN-06D1Ax 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 in Figure 49. The preferred airflow direction for the module
is in Figure 50.
25.4_
Wind Tunnel
PWBs
(1.0)
Power Module
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Air
flow
Figure 49
Thermal Test Setup
The thermal reference points, Tref used in the specifications are also shown in Figure 50. For reliable operation the temperatures
at these points should not exceed 120°C. The output power of the module should not exceed the rated power of the module (Vo,
set x Io, max)
Figure 50
Preferred airflow direction and location of hot-spot of the module (Tref)
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SLDN-06D1Ax
Requirements:
Vin:
12V
Vout:
1.8V
Iout:
4.5A max., worst case load transient is from 3A to 4.5A
1.5% of Vout (27mV) for worst case load transient
1.5% of Vin (50mV, p-p)
Vout:
Vin, ripple
Vin+
Vout+
VIN
VOUT
VS+
PGOOD
RTUNE
CTUNE
MODULE
SEQ
SEQ
TRIM
ADDR0
ADDR1
CI2
CI3
CI1
CO3
CO1
CO2
DATA
SMBALRT#
RTrim
ON/OFF
SYNC
RADDR1 RADDR0
SIG_GND
GND
VS-
GND
CI1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01)
CI2 1x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)
CI3 470F/16V bulk electrolytic
CO1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01)
CO2 1 x 47F/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)
CO3 1 x 330F/6.3V Polymer (e.g. Sanyo Poscap)
CTune 2200pF ceramic capacitor (can be 1206, 0805 or 0603 size)
RTune 178 ohms SMT resistor (can be 1206, 0805 or 0603 size)
RTrim 10k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Note: The DATA, CLK and SMBALRT pins do not have any pull-up resistors inside the module. Typically, the SMBus master controller will
have the pull-up resistors as well as provide the driving source for these signals.
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SLDN-06D1Ax
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).
Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered using a reflow profile with a
peak temperature of no more than 260 ºC for less than 5 seconds.
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PIN
FUNCTION
ON/OFF
VIN
1
2
GND
3
VOUT
4
SENSE
TRIM
5
6
GND
7
CLK
8
SEQ
9
PGOOD
SYNC1
VS-
10
11
12
13
14
15
16
17
SIG. GND
SMBALERT
DATA
ADDR0
ADDR1
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SLDN-06D1Ax
PAD LAYOUT
Recommended Pad Layout
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The SLDN-06D1Ax 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”)
24.00 mm (0.945”)
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SLDN-06D1Ax
Pick and Place
The SLDN-06D1Ax 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 product code, serial number and the location of manufacture.
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum
pressure and 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
7 mm.
Bottom Side / First Side Assembly
This SLDN-06D1Ax module is not recommended for assembly on the bottom side of a customer board. If such an assembly is
attempted, components may fall off the module during the second reflow process.
Lead Free Soldering
The SLDN-06D1Ax 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 below may result in the failure of or cause damage to the
modules and can adversely affect long-term reliability.
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 (table 5-2). The suggested Pb-free solder paste is
Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 51. Soldering outside of the
recommended profile requires testing to verify results and performance.
It is recommended that the pad layout include a test pad where the output pin is in the ground plane. The thermocouple should be
attached to this test pad since this will be the coolest solder joints. The temperature of this point should be:
Maximum peak temperature is 260 C.
Minimum temperature is 235 C.
Dwell time above 217 C: 60 seconds minimum Dwell time above 235 C: 5 to 15 second.
MSL Rating
The SLDN-06D1Ax modules have a MSL rating of 2A.
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Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-
STD-033 Rev. B (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.
Figure51
Recommended linear reflow profile using Sn/Ag/Cu solder
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. For
guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and
Cleaning Application Note (AN04-001).
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SLDN-06D1Ax
DATE
REVISION
CHANGES DETAIL
APPROVAL
HL LU
2012-03-20
2012-05-09
A
B
First release
Adding patent info
HL LU
Update part selection, output specifications, general specifications,
safety considerations, analog voltage margining, output voltage
adjustment using the Power Management Bus, Power Management
Bus adjustable overcurrent warning, Power Management Bus
adjustable input undervoltage lockout, measuring output current using
the Power Management Bus, summary of supported Power
Management Bus commands, thermal considerations, example
application circuit, packaging details, MSL rating
2015-07-02
C
XF Jiang
HL LU
2017-05-31
2019-01-14
AD
AE
Update the version
Disclamer added: Power Management Bus is a registered trademark of
SMIF, Inc.
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
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