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Description
Demonstration circuit 2240A is a synchronous four-
quadrant converter featuring the
controller. The LT8714 can regulate to positive, negative,
or zero volts when configured as a four-quadrant topol-
ogy. The DC2240A regulates from a 10V to 14V input
source to an adjustable output voltage from positive 5V
to negative 5V with a 5A maximum current rating, and
operates at 200kHz switching frequency.
The LT8714 incorporates a power good feature to let
the user know if the output voltage is within its target
regulation voltage.
The LT8714 has an output voltage control (CTRL) pin
which sets the output voltage. The DC2240A has a
performance summary
PARAMETER
Input Voltage
Positive Output Voltage (Max)
Negative Output Voltage (Max)
Maximum Output Current
Positive Output Voltage Ripple
Negative Output Voltage Ripple
Typical Switching Frequency
Efficiency
Synchronous Four-Quadrant
jumper to select the CTRL pin voltage source from either
LT
8714
switching
externally (EXT) or internally (INT). If selected internally,
®
the output voltage can be set to +5V or –5V. If selected
externally, the output voltage can vary between positive
5V and negative 5V, following a 0.1V – 1V CTRL signal
with high bandwidth.
The LT8714 data sheet gives a complete description of
the part, operation and application information. The data
sheet must be read in conjunction with this quick start
guide for demo circuit 2240A.
Design files for this circuit board are available at
http://www.linear.com/8714
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at T
CONDITIONS
V
= 10V – 14V
IN
V
= 10V – 14V
IN
V
= 10V – 14V, V
= 5V, I
IN
OUT
OUT
V
= 10V – 14V, V
= –5V, I
IN
OUT
V
= 12V, V
= 5V, I
= 5A
IN
OUT
OUT
V
= 12V, V
= –5V, I
= –5A
IN
OUT
OUT
Figure 1. DC2240A Connection Diagram
DEMO MANUAL DC2240A
= 25°C
A
= 5A (20MHz BW)
= –5A (20MHz BW)
OUT
LT8714
Converter
MIN
TYP
MAX
10
12
14
4.85
5
5.15
–4.85
–5
–5.15
5
25
25
200
89
80
dc2240af
UNITS
V
V
V
A
mV
P-P
mV
P-P
kHz
%
%
1
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Related Manuals for Linear Technology DC2240A
Summary of Contents for Linear Technology DC2240A
- Page 1 The LT8714 has an output voltage control (CTRL) pin http://www.linear.com/8714 which sets the output voltage. The DC2240A has a L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. performance summary Specifications are at T = 25°C...
- Page 2 DEMO MANUAL DC2240A Quick start proceDure Demonstration circuit 2240A is easy to set up to evalu- 3. Check for the proper output voltages. The output should ate the performance of the LT8714. Refer to Figure 1 for be regulated at +5.0V (±3%).
- Page 3 DEMO MANUAL DC2240A Quick start proceDure INPUT OR OUTPUT CAPACITOR Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple = 10V, V = +5V = 12V, V = +5V = 14V, V = +5V = 10V, V = –5V = 12V, V = –5V...
- Page 4 DEMO MANUAL DC2240A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN1, CIN2, CIN3, CIN4 CAP., X5R, 22µF, 25V, 10%, 1210 MURATA, GRM32ER61E226KE15L C1, C2, C3, C4, C20, C21 CAP., X5R, 22µF, 25V, 10%, 1210 MURATA, GRM32ER61E226KE15L CO1, CO2 CAP., X5R, 100µF, 10V, 20%, 1210...
- Page 5 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 6 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.
- Page 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC2240A...
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