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Table of Contents
Description
Demonstration circuit 2465A is a 3-phase ideal diode bridge
using three
LT
4320
controllers and six N-channel FETs.
®
This demo board provides highly efficient 3-phase recti-
fication with an input voltage range from 5VAC to 28VAC
RMS (line to neutral) and maximum load current of 25A.
High efficiency 3-phase rectification is achieved by using
six low R
(3.3mΩ typical) N-channel FETs instead
DS(ON)
of the six diodes used in a conventional 3-phase diode
bridge. This solution reduces heat dramatically and eases
performance summary
PARAMETER
Input Voltage
Output Voltage
Output Current
Input Line Frequency
typical application
3-Phase Diode Bridge
84% Efficiency at 5VAC RMS L-N, 25A
PHASE 1
PHASE 2
PHASE 3
3-Phase Ideal Diode Bridge
thermal design requirements. Furthermore, power lost to
the diodes is available to the application.
The 3-phase ideal diode bridge eliminates a costly heat sink
and active cooling solutions required with a conventional
3-phase diode bridge. Overall solution cost and size can
be dramatically reduced.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2465A
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
Line to Neutral AC RMS Voltage
Line to Line AC RMS Voltage
DC Voltage
Without Forced Airflow
V
+
OUT
V
–
OUT
DC2465 TA01a
DEMO MANUAL DC2465A
= 25°C
A
3-Phase Ideal Diode Bridge
97% Efficiency at 5VAC RMS L-N, 25A
PHASE 1
PHASE 2
PHASE 3
DC2465 TA01b
LT4320
MIN
TYP
MAX
5
28
9
48
70
25
400
V
+
OUT
IN1
TG
3×
+
LT4320
IN2
BG
V
–
OUT
dc2465af
UNITS
V
V
V
A
Hz
1
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Table of Contents
Related Manuals for Linear Technology DC2465A
Summary of Contents for Linear Technology DC2465A
- Page 1 3-phase diode http://www.linear.com/demo/DC2465A bridge. This solution reduces heat dramatically and eases 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: Board Photos
DEMO MANUAL DC2465A thermal performance comparison Conventional 3-Phase Diode Bridge, 48°C Temperature Rise 3-Phase Ideal Diode Bridge,10°C Temperature Rise PDS5100H Infineon BSC035N10NS5ATMA1 Figure 1. Conditions: 24VAC RMS (L-N), 5A Load Current, Without Forced Airflow BoarD photos Top Side Bottom Side... -
Page 3: Quick Start Procedure
Put the voltmeter in DC volt measurement mode. 1. Verify that the output voltage of the 3-phase AC source is within the input voltage range of the DC2465A as 3. Raise the output voltage of the 3-phase AC source to shown in Table 1. -
Page 4: Parts List
DEMO MANUAL DC2465A parts list ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C3, C4 CAP , CER, X7S 1µF 100V 20% 0805 TDK C2012X7S2A105M125AB CAP , ELE, 10µF 100V 20% 6.3X6.0 SUNCON 100CE-10KX D3, D4, D6, D7, D9, D10,... -
Page 5: Schematic Diagram
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.
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