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Description
Demonstration circuit 1923A features the LTC3129-1, a
high efficiency 200mA buck-boost DC/DC converter with
a wide V
and V
IN
OUT
The DC1923A demo board has two user selectable operat-
ing modes: Burst Mode
PWM (JP3). There is also an accurate programmable RUN
pin which is used to ENABLE the converter (JP1). The
LTC3129-1 also incorporates a maximum power point
control function which can be enabled (JP2) for applications
where the input source is a solar cell or is high imped-
ance, such as intrinsically safe applications or high Z
thermal electric generators (TEGs). The LTC3129-1 also
features fixed output voltages with eight user-selectable
settings (JP4, JP5, JP6). This allows the user to eliminate
the output voltage divider and the associated bias current.
The DC1923A operates with a 2.42V to 15V input voltage
range, and has been designed with the output voltage set
to 5V. The demo board can be programmed to any of the
eight voltage settings by using jumpers JP4, JP5, and JP6.
performance summary
PARAMETER
Input Voltage Range
VOUT
IOUT (see Note 1)
Efficiency
Note 1: The demo board output current is a function of VIN. Please refer to the data sheet for more information.
Arrow.com.
Downloaded from
15V, 200mA Synchronous Buck-Boost DC/DC
Converter with 1.3µA Quiescent Current
range.
operation and fixed frequency
®
DEMO MANUAL DC1923A
Once the converter is started the LTC3129-1 can operate
with V
as low as 1.92V provided V
IN
the data sheet for more information on these options.
The DC1923A demo board also incorporates a connector
(J1) which can be used to connect to a Dust Networks
mote demo board.
Figure 1 shows typical demo board efficiency and Figure 2
shows typical step response.
The LTC3129-1 data sheet has detailed information about
the operation, specification, and applications of the part.
OUT
The data sheet should be read in conjunction with this
quick start guide.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Specifications are at T
= 25°C
A
LTC3129-1
is back-fed. Consult
CC
TYPICAL
2.42V to 15V
5V; 8 User Selectable Voltages
200mA, for VIN > V
OUT
See Figure 1
®
dc1923af
1
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Related Manuals for Linear Technology DC1923A
Summary of Contents for Linear Technology DC1923A
- Page 1 The DC1923A operates with a 2.42V to 15V input voltage L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are registered trademarks of Linear Technology Corporation. All other trademarks are the property range, and has been designed with the output voltage set of their respective owners.
-
Page 2: Quick Start Procedure
0.01 1000 LOAD (mA) Figure 1. DC1923A Efficiency Figure 2. DC1923A 50mA to 100mA Output Step Response Quick start proceDure Using short twisted pair leads for any power connections 1. Jumper, PS1 and LOAD settings to start: and with all loads and power supplies off, refer to Figure 3 PS1: for the proper measurement and equipment setup. - Page 3 Newer motes may require In general for VIN > VOUT IOUT can be increased to a different VOUT. The DC1923A demo board can be 200mA. For VIN < VOUT IOUT capability will be reduced. configured for different VOUT voltages by simply 8.
- Page 4 DEMO MANUAL DC1923A Quick start proceDure Figure 3. Proper Measurement Equipment Setup Figure 4. Measuring Input or Output Ripple Figure 5. DC1923A Connected to DC9003A Dust Mote (Top View) dc1923af Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from...
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Page 5: Parts List
DEMO MANUAL DC1923A Quick start proceDure Figure 6. DC1923A Connected to DC9003A Dust Mote (Bottom View) parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP CER 22µF 25V X5R 20% 1210 TDK, C3225X5R1E226M C2, C4 CAP CER 1µF 25V X5R 0603 TDK, C1608X5R1E105M CAP CER 10µF 25V X5R 1210... -
Page 6: Schematic Diagram
DEMO MANUAL DC1923A schematic Diagram dc1923af Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from... - Page 7 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 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. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
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