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20A Digital MicroDLynx
User Manual
40 pgs1.38 Mb0

GE Industrial Solutions 20A Digital MicroDLynx User Manual

GE
Data Sheet
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 1
Features
Compliant to RoHS EU Directive 2002/95/EC (Z versions) Compatible in a Pb-free or SnPb reflow environment (Z
versions)
Compliant to IPC-9592 (September 2008), Category 2, Class II DOSA based Wide Input voltage range (3Vdc-14.4Vdc) Output voltage programmable from 0.45Vdc to 5.5Vdc via
external resistor and PMBus
TM #
Digital interface through the PMBus
TM #
protocol
Tunable Loop
TM
to optimize dynamic output voltage response
Flexible output voltage sequencing EZ-SEQUENCE Power Good signal Fixed switching frequency with capability of external
synchronization
Output over current protection (non-latching) Over temperature protection Remote On/Off Ability to sink and source current Cost efficient open frame design Small size: 20.32 mm x 11.43 mm x 8.5 mm (0.8 in x
0.45 in x 0.334 in)
Wide operating temperature range [-40°C to 85°C] UL* 60950-1 2
nd
Ed. Recognized, CSA† C22.2 No. 60950-1-07
Certified, and VDE‡ (EN60950-1 2nd Ed.) Licensed
ISO** 9001 and ISO 14001 certified manufacturing facilities
Applications
Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Servers and storage applications Networking equipment Industrial equipment
Description
The 20A Digital MicroDLynxTM power modules are non-isolated dc-dc converters that can deliver up to 20A of output current. These modules operate over a wide range of input voltage (VIN = 3Vdc-14.4Vdc) and provide a precisely regulated output voltage from 0.6Vdc to 5.5Vdc, programmable via an external resistor and PMBusTM control. Features include a digital interface using the PMBus
TM
protocol, remote On/Off, adjustable output voltage, over current and over temperature protection. The PMBus
TM #
interface supports a range of commands to both control and monitor the module. The module also includes the Tunable LoopTM feature that 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.
* UL is a registered trademark of Underwriters Laboratories, Inc.
†
CSA is a registered trademark of Canadian Standards Association.
‡
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
#
The PMBus name and logo are registered trademarks of the System Management Interface Forum (SMIF)
TRIM
VOUT
VS+
GND
RTUNE
CTUNE
RTrim
VIN
Co
Cin
Vout+
Vin+
ON/OFF
SEQ
MODULE
PGOOD
SMBALRT#
SIG_GND
ADDR1
RADDR0
CLK
DATA
ADDR0
VS-
RADDR1
GND
SYNC
RoHS Compliant
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 2
Parameter
Device
Symbol
Min
Max
Unit
Input Voltage
All
V
IN
-0.3
15
V
Continuous
SEQ, SYNC, VS+
All 7 V
CLK, DATA, SMBALERT#
All
3.6
V
Operating Ambient Temperature
All
TA -40
85
°C
(see Thermal Considerations section)
Storage Temperature
All
T
stg
-55
125
°C
Parameter
Device
Symbol
Min
Typ
Max
Unit
Operating Input Voltage
All
VIN
3  14.4
Vdc
Maximum Input Current
All
I
IN,max
19
Adc
(VIN=3V to 14V, IO=I
O, max
)
Input No Load Current (VIN = 12Vdc, IO = 0, module enabled)
V
O,set
=
0.6 Vdc
I
IN,No load
69 mA
V
O,set
=
5Vdc
I
IN,No load
134 mA
Input Stand-by Current (VIN = 12Vdc, module disabled)
All
I
IN,stand-by
16.4 mA
Inrush Transient
All
I2t
1
A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= I
Omax
;
See Test Configurations)
All
50 mAp-p Input Ripple Rejection (120Hz)
All
-64 dB
Absolute Maximum Ratings
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.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 3
Parameter
Device
Symbol
Min
Typ
Max
Unit
Output Voltage Set-point (with 0.1% tolerance for external resistor used to set output voltage)
All
V
O, set
-1.0 +1.0
% V
O, set
Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life)
All
V
O, set
-3.0  +3.0
% V
O, set
Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on the input voltage – see Feature Descriptions Section)
All
VO 0.6 5.5
Vdc
PMBus Adjustable Output Voltage Range
All
VO,adj
-25 0 +25
%V
O,set
PMBus Output Voltage Adjustment Step Size
All
0.4
%V
O,set
Remote Sense Range
All
0.5
Vdc
Output Regulation (for VO ≥ 2.5Vdc)
Line (VIN=V
IN, min
to V
IN, max
)
All
 +0.4
% V
O, set
Load (IO=I
O, min
to I
O, max
)
All
 10
mV
Output Regulation (for VO < 2.5Vdc)
Line (VIN=V
IN, min
to V
IN, max
)
All
 5
mV
Load (IO=I
O, min
to I
O, max
)
All
 10
mV
Temperature (T
ref=TA, min
to T
A, max
)
All
 0.4
% V
O, set
Output Ripple and Noise on nominal output
(VIN=V
IN, nom
and IO=I
O, min
to I
O, max
Co = 0.1μF // 22 μF
ceramic capacitors)
Peak-to-Peak (5Hz to 20MHz bandwidth)
All
 50
100
mV
pk-pk
RMS (5Hz to 20MHz bandwidth)
All
20
38
mV
rms
External Capacitance1
Without the Tunable Loop
TM
ESR ≥ 1 mΩ
All
C
O, max
2x47  2x47
μF
With the Tunable Loop
TM
ESR ≥ 0.15 mΩ
All
C
O, max
2x47  1000
μF
ESR ≥ 10 mΩ
All
C
O, max
2x47
10000
μF
Output Current (in either sink or source mode)
All
Io 0 20
Adc
Output Current Limit Inception (Hiccup Mode) (current limit does not operate in sink mode)
All
I
O, lim
130 % I
o,max
Output Short-Circuit Current
All
I
O, s/c
1.4 Arms
(VO≤250mV) ( Hiccup Mode )
Efficiency
V
O,set
= 0.6Vdc
η 79.2 %
VIN= 12Vdc, TA=25°C
V
O, set
= 1.2Vdc
η 87.1 %
IO=I
O, max , VO
= V
O,set
V
O,set
= 1.8Vdc
η 90.4 %
V
O,set
= 2.5Vdc
η 92.6 %
V
O,set
= 3.3Vdc
η 93.8 %
V
O,set
= 5.0Vdc
η 95.2 %
Switching Frequency
All
f
sw
500  kHz
Electrical Specifications (continued)
1
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.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 4
Parameter
Device
Symbol
Min
Typ
Max
Unit
Frequency Synchronization
All
Synchronization Frequency Range
All
425 600
kHz
High-Level Input Voltage
All
V
IH
2.0 V Low-Level Input Voltage
All
V
IL
0.4
V
Input Current, SYNC
All
I
SYNC
100
nA
Minimum Pulse Width, SYNC
All
t
SYNC
100
ns
Maximum SYNC rise time
All
t
SYNC_SH
100
ns
Parameter
Device
Min
Typ
Max
Unit
Calculated MTBF (IO=0.8I
O, max
, TA=40°C) Telecordia Issue 2
Method 1 Case 3
All
15,455,614
Hours
Weight
 4.54 (0.16)
g (oz.)
Parameter
Device
Symbol
Min
Typ
Max
Unit
On/Off Signal Interface
(VIN=V
IN, min
to V
IN, max
; open collector or equivalent,
Signal referenced to GND)
Device code with suffix “4” – Positive Logic (See Ordering Information)
Logic High (Module ON)
Input High Current
All
IIH  1
mA
Input High Voltage
All
VIH 2  V
IN,max
V
Logic Low (Module OFF)
Input Low Current
All
IIL
1
mA
Input Low Voltage
All
VIL -0.2  0.6
V
Device Code with no suffix – Negative Logic (See Ordering Information)
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Logic High (Module OFF)
Input High Current
All
IIH ― ― 1 mA
Input High Voltage
All
VIH 2 ―
V
IN, max
Vdc
Logic Low (Module ON)
Input low Current
All
IIL ― ―
10
μA
Input Low Voltage
All
VIL
-0.2 ― 0.6
Vdc
Electrical Specifications (continued)
General Specifications
Feature Specifications
Unless otherwise indicated, specifications apply overall operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 5
Parameter
Device
Symbol
Min
Typ
Max
Units
Turn-On Delay and Rise Times
(VIN=V
IN, nom
, IO=I
O, max , VO
to within ±1% of steady state)
Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = V
IN, min
until Vo =
10% of Vo, set)
All
Tdelay
―
1.2 ― msec
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)
All
Tdelay
―
0.8 ― msec
Output voltage Rise time (time for Vo to rise from 10% of Vo, set to 90% of Vo, set)
All
Trise
―
2.7 ― msec
Output voltage overshoot (TA = 25oC VIN= V
IN, min
to V
IN, max,IO
= I
O, min
to I
O, max
)
With or without maximum external capacitance
3.0
% V
O, set
Over Temperature Protection (See Thermal Considerations section)
All
T
ref
120
°C
PMBus Over Temperature Warning Threshold *
All
T
WARN
120 °C
Tracking Accuracy (Power-Up: 2V/ms)
All
VSEQ –Vo
100
mV
(Power-Down: 2V/ms)
All
VSEQ –Vo
100
mV
(V
IN, min
to V
IN, max
; I
O, min
to I
O, max
VSEQ < Vo)
Input Undervoltage Lockout
Turn-on Threshold
All
3.25
Vdc
Turn-off Threshold
All
2.6
Vdc
Hysteresis
All
0.25 Vdc
PMBus Adjustable Input Under Voltage Lockout Thresholds
All
2.5 14
Vdc
Resolution of Adjustable Input Under Voltage Threshold
All
500
mV
PGOOD (Power Good)
Signal Interface Open Drain, V
supply
5VDC
Overvoltage threshold for PGOOD ON
All
108 %V
O, set
Overvoltage threshold for PGOOD OFF
All
105 %V
O, set
Undervoltage threshold for PGOOD ON
All
110 %V
O, set
Undervoltage threshold for PGOOD OFF
All
90 %V
O, set
Pulldown resistance of PGOOD pin
All
50
Sink current capability into PGOOD pin
All
5
mA
Feature Specifications (cont.)
* Over temperature Warning – Warning may not activate before alarm and unit may shutdown before warning
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 6
Parameter
Conditions
Symbol
Min
Typ
Max
Unit
PMBus Signal Interface Characteristics
Input High Voltage (CLK, DATA)
VIH
2.1 3.6 V Input Low Voltage (CLK, DATA)
VIL
0.8
V
Input high level current (CLK, DATA)
IIH
-10 10
μA
Input low level current (CLK, DATA)
IIL
-10 10
μA
Output Low Voltage (CLK, DATA, SMBALERT#)
I
OUT
=2mA
VOL
0.4
V
Output high level open drain leakage current (DATA, SMBALERT#)
V
OUT
=3.6V
I
OH
0 10
μA
Pin capacitance
CO
0.7 pF
PMBus Operating frequency range
Slave Mode
FPMB
10 400
kHz
Data hold time
Receive Mode
Transmit Mode
tHD:DAT
0
300
ns
Data setup time
tSU:DAT
250
ns
Measurement System Characteristics
Read delay time
tDLY
153
192
231
μs
Output current measurement range
I
RNG
0 26
A
Output current measurement resolution
IRES
62.5
mA
Output current measurement accuracy at 25°C (with I
OUT,
CORR
)
I
ACC
±5
%
Output current measurement offset
I
OFST
0.1 A V
OUT
measurement range
V
OUT(rng)
0 5.5
V
V
OUT
measurement resolution
V
OUT(res)
15.62 5
mV
V
OUT
measurement accuracy
V
OUT, ACC
-15 5
%
V
OUT
measurement offset
V
OUT(ofst)
-3 3 % VIN measurement range
V
IN(rng)
0 14.4
V
VIN measurement resolution
V
IN(res)
32.5 mV
VIN measurement accuracy
V
IN, ACC
-15 5
%
VIN measurement offset
V
IN(ofst)
-5.5
-2
1.4
LSB
Digital Interface Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 7
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA OC
Figure 1. Converter Efficiency versus Output Current.
Figure 2. Derating Output Current versus Ambient Temperature and Airflow.
V
O
(V) (10mV/div)
I
O
(A) (10Adiv) V
O
(V) (10mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 3. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).
Figure 4. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 1x47uF +11x330uF CTune=47nF, RTune=178 ohms
V
O
(V) (200mV/div) V
ON/OFF
(V) (5V/div)
V
O
(V) (200mV/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
50
55
60
65
70
75
80
85
90
0 5 10 15 20
Vin=3.3V
Vin=14V
Vin=12V
2
6
10
14
18
22
55 65 75 85 95 105
0.5m/s
(100LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
NC
2m/s
(400LFM)
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 0.6Vo and 25oC.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 8
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current.
Figure 8. Derating Output Current versus Ambient Temperature and Airflow.
V
O
(V) (20mV/div)
I
O
(A) (10Adiv) V
O
(V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 9. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).
Figure 10. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 1x47uF +5x330uF, CTune=10nF & RTune=178 ohms
V
O
(V) (500mV/div) V
ON/OFF
(V) (5V/div)
V
O
(V) (500mV/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
50
55
60
65
70
75
80
85
90
95
0 5 10 15 20
Vin=3.3V
Vin=14V
Vin=12V
2
6
10
14
18
22
55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 1.2Vo and 25oC.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 9
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA OC
Figure 13. Converter Efficiency versus Output Current.
Figure 14. Derating Output Current versus Ambient Temperature and Airflow.
V
O
(V) (20mV/div)
I
O
(A) (10Adiv) V
O
(V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 15. Typical output ripple and noise (CO=2X47μF ceramic, VIN = 12V, Io = Io,max, ).
Figure 16. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 2x47uF +3x330uF, CTune=5600pF & RTune=220 ohms
V
O
(V) (500mV/div) V
ON/OFF
(V) 5V/div)
V
O
(V) (500mV/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
70
75
80
85
90
95
0 5 10 15 20
Vin=3.3V
Vin=14V
Vin=12V
2
6
10
14
18
22
55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 1.8Vo and 25oC.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 10
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA OC
Figure 19. Converter Efficiency versus Output Current.
Figure 20. Derating Output Current versus Ambient Temperature and Airflow.
V
O
(V) (20mV/div)
I
O
(A) (10Adiv) V
O
(V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 21. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).
Figure 22. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 2x47uF +2x330uF, CTune=3300pF & RTune=220 ohms
V
O
(V) (1V/div) V
ON/OFF
(V) (5V/div)
V
O
(V) (1V/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 24. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
70
75
80
85
90
95
100
0 5 10 15 20
Vin=4.5V
Vin=14V
Vin=12V
2
6
10
14
18
22
55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 2.5Vo and 25oC.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 11
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA OC
Figure 25. Converter Efficiency versus Output Current.
Figure 26. Derating Output Current versus Ambient Temperature and Airflow.
V
O
(V) (50mV/div)
I
O
(A) (10Adiv) V
O
(V) (50mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 27. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).
Figure 28 Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 5x47uF +1x330uF, CTune=2200pF & RTune=220 ohms
V
O
(V) (1V/div) V
ON/OFF
(V) (5V/div)
V
O
(V) (1V/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 30. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
70
75
80
85
90
95
100
0 5 10 15 20
Vin=4.5V
Vin=14V
Vin=12V
2
6
10
14
18
22
55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
2m/s
(400LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 3.3Vo and 25oC.
GE
Data Sheet
20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 12
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA OC
Figure 31. Converter Efficiency versus Output Current.
Figure 32. Derating Output Current versus Ambient Temperature and Airflow.
V
O
(V) (50mV/div)
I
O
(A) (10Adiv) V
O
(V) (50mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 33. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).
Figure 34. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 8x47uF, CTune=1500pF & RTune=220 ohms
V
O
(V) (2V/div) V
ON/OFF
(V) (5V/div)
V
O
(V) (2V/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 35. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 36. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
70
75
80
85
90
95
100
0 5 10 15 20
Vin=7V
Vin=12V
Vin=14V
2
6
10
14
18
22
55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
(300LFM)
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 5Vo and 25oC.
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