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Inverting-Output DC/DC µModule Regulator
Description
Demonstration circuit 2328A is an inverting buck-boost
converter with 12V to 34V input voltage, –24V output volt-
age and max 2A output current capability, which features
the LTM
4651Y. The
LTM4651
®
24W inverting-topology DC/DC µModule regulator. It is
designed to meet the radiated emissions requirement of
EN55022B. A switching frequency range of 250kHz to
performance summary
PARAMETER
Input Voltage Range
Output Voltage, V
OUT
Maximum Output Current, I
OUT
Default Operating Frequency
Efficiency
BoarD photo
EN55022B Compliant 58V, 24W
is an ultralow noise, 58V,
Specifications are at T
CONDITIONS
12V
, 0A to 1A; 24V
, 0A to 2A; 34V
IN
IN
Derating for Certain V
and Thermal Conditions
IN
24V
, –24V
, 2A
IN
OUT
DC2328A Top View
DEMO MANUAL DC2328A
3MHz is supported and the module can synchronize to
an external clock. The LTM4651 data sheet must be read
in conjunction with this demo manual prior to working on
or modifying demo circuit DC2328A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2328A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
= 25°C
A
, 0A to 2A
IN
LTM4651
VALUE
12V to 34V
–24V ±2%
2A
1.2MHz
87.5%
dc2328af
1
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Related Manuals for Analog Devices Linear Technology DC2328A
Summary of Contents for Analog Devices Linear Technology DC2328A
- Page 1 DEMO MANUAL DC2328A LTM4651 EN55022B Compliant 58V, 24W Inverting-Output DC/DC µModule Regulator Description Demonstration circuit 2328A is an inverting buck-boost 3MHz is supported and the module can synchronize to converter with 12V to 34V input voltage, –24V output volt- an external clock. The LTM4651 data sheet must be read age and max 2A output current capability, which features in conjunction with this demo manual prior to working on the LTM...
-
Page 2: Quick Start Procedure
DEMO MANUAL DC2328A Quick start proceDure Demonstration circuit 2328A is easy to set up to evaluate 5. Once the proper output voltages are established, adjust the performance of the LTM4651Y. Refer to Figure 1 for the loads within the operating range and observe the the proper measurement equipment setup and follow the output voltage regulation, ripple voltage and other procedure below:... - Page 3 DEMO MANUAL DC2328A Quick start proceDure Optional –12V However, to maximize the efficiency of the regulator for different input voltage, the switching frequency can be Besides the default –24V output voltage which shows the adjusted by changing R13. For the recommended switch- full capacity of LTM4651, it is very easy to customize ing frequency for given input voltage and given output the DC2328A demo board to make other negative output...
- Page 4 DEMO MANUAL DC2328A Quick start proceDure 1A/DIV 1A/DIV (AC) (AC) 200mV/DIV 200mV/DIV 10V/DIV 10V/DIV 1ms/DIV 1ms/DIV DC2328 F05 DC2328 F06 Figure 5. 0A ←→ 1A Load Transients Figure 6. 0A ←→ 2A Load Transients = 12V, V = –24V) = 24V, V = –24V) (AC) 20mV/DIV...
- Page 5 DEMO MANUAL DC2328A MEAS DIST 10m SPEC DIST 10m [1] HORIZONTAL [2] VERTICAL QPK LIMIT FORMAL –10 930 1000 FREQUENCY (MHz) DC2328 F11 Figure 11. Radiated Emissions Scan of the LTM4651. Producing –24V at 1A, from 12V DC2328A Hardware. f = 1.2MHz. Measured in a 10m Chamber. Peak Detect Method MEAS DIST 10m SPEC DIST 10m [1] HORIZONTAL...
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Page 6: Parts List
DEMO MANUAL DC2328A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C3, C8, C25, C28 CAP ., X7R, 4.7µF, 80V, 10%, 1210 MURATA, GRM32ER71K475KE14L C2, C4, C5, C6, C16, C17 CAP ., X7R, 10µF, 50V, 10%, 1210 MURATA, GRM32ER71H106KA12L C19, C20, C21, C22, C23 CAP ., OPT, 1210... -
Page 7: Schematic Diagram
DEMO MANUAL DC2328A schematic Diagram dc2328af Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. - Page 8 DEMO MANUAL DC2328A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use.
- Page 9 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC2328A...
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