Linear Technology LT4320IDD Demo Board: 1.2kW Ideal Diode Bridge Full-Wave Rectifier [9V to 40V, 30A] DC1823A DC1823A 数据表
产品代码
DC1823A
LT4320/LT4320-1
1
4320fb
Features
Description
Ideal Diode Bridge
Controller
that drive four N-channel MOSFETs, supporting voltage
rectification from DC to 600Hz typical. By maximizing
available voltage and reducing power dissipation (see
thermograph comparison below), the ideal diode bridge
simplifies power supply design and reduces power supply
cost, especially in low voltage applications.
An ideal diode bridge also eliminates thermal design
An ideal diode bridge also eliminates thermal design
problems, costly heat sinks, and greatly reduces PC board
area. The LT4320’s internal charge pump supports an all-
NMOS design, which eliminates larger and more costly
PMOS switches. If the power source fails or is shorted, a
fast turn-off minimizes reverse current transients.
The LT4320 is designed for DC to 60Hz typical voltage
The LT4320 is designed for DC to 60Hz typical voltage
rectification, while the LT4320-1 is designed for DC to
600Hz typical voltage rectification. Higher frequencies of
operation are possible depending on MOSFET size and
operating load current.
applications
n
Maximizes Power Efficiency
n
Eliminates Thermal Design Problems
n
DC to 600Hz
n
9V to 72V Operating Voltage Range
n
I
Q
= 1.5mA (Typical)
n
Maximizes Available Voltage
n
Available in 8-Lead (3mm
× 3mm) DFN, 12-Lead
MSOP and 8-Lead PDIP Packages
n
Security Cameras
n
Terrestrial or Airborne Power Distribution Systems
n
Power-over-Ethernet Powered Device with a
Secondary Input
n
Polarity-Agnostic Power Input
n
Diode Bridge Replacement
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.
Patent pending.
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–
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TG1
IN1
LT4320
BG2
IN2
BG1
TG2
OUTN
OUTP
4320 TA01a
OUTPUT
9V TO 72V
INPUT
DC TO 600Hz (TYP)
Thermograph of Passive Diode Bridge
Thermograph of LT4320
Driving Four MOSFETs
SBM1040 (
×4)
4320 TA01b
typical application
Temperature Rise
CURRENT
MOSFET
2.5mΩ
DIODE
SBM
1040
2A
0.6°C
15°C
4A
3.5°C
32°C
6A
6.7°C
49°C
8A
11°C
66°C
10A
16°C
84°C
DC Input, On Same PCB
LT4320+2.5mΩ FET (
×4)
CONDITIONS: 24V AC
IN
, 9.75A DC LOAD ON SAME PCB
4320 TA01c