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60V Dual Output Step-Down DC/DC Controller
DESCRIPTION
Demonstration circuit 2155A is available in two configura-
tions. The DC2155A-A is a dual output synchronous step-
down converter featuring the
current mode controller. The DC2155A-B is a single output
synchronous step-down converter that operates with four
phases: two from the LTC3886 and two from LTC3870,
a phase extender. Both versions have a PMBus interface
and digital power system management functions.
The DC2155A uses discrete MOSFETs in the power stage.
The input range of this board is from 18V to 54V. The out-
put voltage can be programmed from 5V to 12V with an
output current of up to 12A per phase. For the DC2155A-A
version, the factory default setting for the CH0 output is
12V and CH1 output is 5V. In addition, this demo board
has an on-board dynamic load circuit, which makes it easy
to evaluate the transient performances.
The DC2155A powers up to default settings and produces
power based on configuration resistors or its program file
loaded within its onboard EEPROM without the need for
any serial bus communication. This allows easy evaluation
PERFORMANCE SUMMARY
DC2155A-A Assembly (Dual Output, LTC3886 Only)
SYMBOL
PARAMETER
V
Input Supply Range
IN
FSW
Factory Default Switching Frequency
V
CH0 Factory Default Output Voltage
OUT0
I
CH0 Output Current Range
OUT0
EFF
CH0 Efficiency
V
CH1 Factory Default Output Voltage
OUT1
I
CH1 Output Current Range
OUT1
EFF
CH1 Efficiency
with Digital Power System Management
LTC
3886, a dual-phase
®
Specifications are at T
CONDITIONS
I
= 0A to 12A, V
OUT0
V
= 12V, V
OUT0
I
= 0A to 12A, V
OUT1
V
= 5V, V
OUT1
IN
DC2155A-A/DC2155A-B
LTC3886/LTC3870
of the DC/DC converter aspects of the LTC3886. To fully
explore the extensive power system management features
of the parts, download the GUI software LTpowerPlay
onto your PC and use LTC's I
DC1613A to connect to the board. LTpowerPlay allows
the user to reconfigure the part on the fly and store the
configuration in EEPROM, view telemetry of voltage, cur-
rent, temperature and fault status.
GUI Software Download
The software can be downloaded from:
LTpowerPlay
For more details and instructions of LTpowerPlay, please
visit Help menu in LTpowerPlay.
Design files for this circuit board are
All registered trademarks and trademarks are the property of their respective owners.
= 25°C
A
= 18V to 54V
IN
= 32V, I
= 12A, See Figure 6a
IN
OUT
= 18V to 54V
IN
= 32V, I
= 12A, See Figure 6b
OUT
DEMO MANUAL
2
C/SMBus/PMBus Dongle
available.
MIN
TYP
MAX
18
32
54
150
12
0
12
96.2
5
0
12
93.6
®
UNITS
V
kHz
V
A
%
V
A
%
Rev. C
1
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Related Manuals for Linear ANALOG DEVICES DC2155A-A
Summary of Contents for Linear ANALOG DEVICES DC2155A-A
- Page 1 DEMO MANUAL DC2155A-A/DC2155A-B LTC3886/LTC3870 60V Dual Output Step-Down DC/DC Controller with Digital Power System Management DESCRIPTION Demonstration circuit 2155A is available in two configura- of the DC/DC converter aspects of the LTC3886. To fully tions. The DC2155A-A is a dual output synchronous step- explore the extensive power system management features down converter featuring the 3886, a dual-phase...
-
Page 2: Performance Summary
DEMO MANUAL DC2155A-A/DC2155A-B PERFORMANCE SUMMARY Specifications are at T = 25°C DC2155A-B Assembly (Four-Phase Single Output, LTC3886 and LTC3870) SYMBOL PARAMETER CONDITIONS UNITS Input Supply Range Factory Default Output Voltage = 0A TO 48A, V = 18V to 54V OUT0 Output Current Range OUT0 Factory Default Switching Frequency... - Page 3 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE – OUT0 SHUNT 12A MAX LOAD RUN0 SWITCH 1 – – DC1613A CONNECTOR 1m SHUNT – POWER SUPPLY – – DC2155 F01 RUN1 SWITCH 2 OUT1 12A MAX SHUNT LOAD – Figure 1. Test Setup for DC2155A-A Rev.
- Page 4 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE – OUT0 36A MAX SHUNT LOAD RUN0 SWITCH 1 – – DC1613A CONNECTOR 1m SHUNT – POWER SUPPLY – DC2155 F01 RUN1 SWITCH 2 OUT1 12A MAX SHUNT LOAD – Figure 2. Test Setup for DC2155A-B Rev.
- Page 5 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE Connecting a PC to DC2155A sequencing parameters, the fault log, fault responses, GPIO and other functionality. The DC1613A dongle may You can use a PC to reconfigure the power management be plugged in regardless of whether or not V is present.
- Page 6 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE Measuring Efficiency DC2155A-B version. Measure V across the input ceramic capacitor C7. Measure V across the output To accurately measure efficiency of any configuration, do ceramic capacitor C10. the following: Set JP6 to OFF position to disable the pulse generator Measuring Output Ripple Voltage circuits.
- Page 7 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE LOAD CURRENT (A) = 0A to 48A LOAD = 150kHz EXTV = 12V (TIED TO V 4-PHASE SINGLE OUTPUT DC2155 F07 Figure 7. DC2155A-B: Efficiency at 12V = 444mV = 438mV O_P-P O_P-P 2OOmV/DIV 2OOmV/DIV OA TO 6A 5A/DIV OA TO 6A...
- Page 8 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE 20MHz BWL = 64mV O_P-P 5OmV/DIV AC-COUPLING 5OmV/DIV AC-COUPLING = 33mV O_P-P DC2155 F09 10µs/DIV = 32V = 12V AT 12A OUT0 = 5V AT 12A OUT1 = 150kHz (DEFAULT SET-UP) Figure 9. DC2155A-A Output Ripple Voltages DC2155 F10 TOP VIEW BOTTOM VIEW...
- Page 9 DEMO MANUAL DC2155A-A/DC2155A-B QUICK START PROCEDURE 20MHz BWL 20MHz BWL = 413mV O_P-P = 20mV O_P-P 2OmV/DIV 2OOmV/DIV AC-COUPLING AC-COUPLING OA TO 24A 2OA/DIV DC2155 F12 50µs/DIV DC2155 F11 100µs/DIV = 32V = 32V = 12V AT 48A OUT0 OUT1 = 12V OUT0 OUT1...
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Page 10: Ltpowerplay Software Gui
DEMO MANUAL DC2155A-A/DC2155A-B LTpowerPlay SOFTWARE GUI LTpowerPlay is a powerful Windows based development power issues when bringing up rails. LTpowerPlay uti- environment that supports Analog Devices power sys- lizes the DC1613A USB-to-SMBus controller to commu- tem management ICs, including the LTC3880, LTC3883, nicate with one of many potential targets, including the LTC3882, LTC3887 and LTC3886. - Page 11 DEMO MANUAL DC2155A-A/DC2155A-B LTpowerPlay QUICK START PROCEDURE The following procedure describes how to use LTpowerPlay d. If you want to change the output voltage to a differ- to monitor and change the settings of LTC3886. ent value, like 10V: in the Config tab, type in 10 in the VOUT_COMMAND box, like this: 1.
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Page 12: Parts List
DEMO MANUAL DC2155A-A/DC2155A-B PARTS LIST DC2155A-A ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C85 CAP, 56μF 20% 63V ELEC SUNCON 63HVP56M C3, C9, C23 CAP, 0603 0.1μF 10% 100V X7R MURATA GRM188R72A104KA35D C4, C5, C27, C33 CAP, 0603 10nF 10% 100V X7R MURATA GRM188R72A103KA01D C6, C13, C28 CAP, 0603 1nF 10% 100V X7R... - Page 13 DEMO MANUAL DC2155A-A/DC2155A-B PARTS LIST DC2155A-A ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER R2, R122 RES, 2512 0.006Ω 1% 1W PANASONIC ERJ-M1WSF6MU R3, R4 RES, 0603 1k 5% 1/10W VISHAY CRCW06031K00JNEA R9, R12, R30, R38 RES, 0603 2Ω 5% 1/10W VISHAY CRCW06032R00JNEA R10, R11, R13, R15, R16, R18, R23, R25, RES, 0603 10k 5% 1/10W VISHAY CRCW060310K0JNEA...
- Page 14 DEMO MANUAL DC2155A-A/DC2155A-B PARTS LIST DC2155A-A ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER C71, C77, C91, C92 CAP, 0805 OPTION OPTION C86, C87 CAP, ELEC OPTION OPTION C98, C99 CAP, 1206 OPTION OPTION D3, D4, D9, D12 DIODE, OPTION OPTION DIODE, ZENER OPTION OPTION L3, L4 IND, OPTION...
- Page 15 DEMO MANUAL DC2155A-A/DC2155A-B PARTS LIST DC2155A-B ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C85 CAP, 56μF, ALUM. ELECT., 63V, 20%, SMD SUN ELECTRONIC INDUSTRIES CORP. 63HVP56M C3, C9, C23, C44, C54, C60 CAP, 0603 0.1μF 10% 100V X7R MURATA GRM188R72A104KA35J C4, C5 CAP, 0603 10nF 10% 100V X7R...
- Page 16 DEMO MANUAL DC2155A-A/DC2155A-B PARTS LIST DC2155A-B ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER XSTR, MOSFET P-CH 20V 5.2A SOT-23 VISHAY SI2365EDS-T1-GE3 Q22, Q23, Q28, Q29 XSTR, MOSFET N-CH 60V 115mA SOT23 FAIRCHILD 2N7002A R2, R122 RES, 2512 0.003Ω 1% 1W PANASONIC ERJ-M1WTF3M0U R3, R4 RES, 0603 1k 5% 1/10W VISHAY CRCW06031K00JNEA...
- Page 17 DEMO MANUAL DC2155A-A/DC2155A-B PARTS LIST DC2155A-B ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER IC, SINGLE OP AMP ANALOG DEVICES, INC., LT1803IS5 Additional Demo Board Circuit Components C16, C17, C31, C32, C51, C53, C65, C66 CAP, 7343 OPTION OPTION C19, C34, C35, C56, C69, C73 CAP, 0603 OPTION OPTION C71, C77, C91, C92...
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Page 18: Schematic Diagram
DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C... - Page 19 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C...
- Page 20 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C...
- Page 21 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C...
- Page 22 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C...
- Page 23 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C...
- Page 24 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C...
- Page 25 DEMO MANUAL DC2155A-A/DC2155A-B SCHEMATIC DIAGRAM Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice.
- Page 26 DEMO MANUAL DC2155A-A/DC2155A-B ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern.