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Linear Technology Electronic Components Datasheet

LT4320 Datasheet

Ideal Diode Bridge Controller

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Features
n Maximizes Power Efficiency
n Eliminates Thermal Design Problems
n DC to 600Hz
n 9V to 72V Operating Voltage Range
n IQ = 1.5mA (Typical)
n Maximizes Available Voltage
n Available in 8-Lead (3mm × 3mm) DFN, 12-Lead
MSOP and 8-Lead PDIP Packages
Applications
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.
LT4320/LT4320-1
Ideal Diode Bridge
Controller
Description
The LT®4320/LT4320-1 are ideal diode bridge controllers
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
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
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.
Typical Application
Thermograph of Passive Diode Bridge
~
INPUT
DC TO 600Hz (TYP)
~
OUTP
TG1 TG2
LT4320
IN1 IN2
BG2 BG1
OUTN
+
OUTPUT
9V TO 72V
4320 TA01a
SBM1040 (×4)
4320 TA01b
Thermograph of LT4320
Driving Four MOSFETs
Temperature Rise
DIODE
MOSFET SBM
CURRENT 2.5mΩ 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)
4320 TA01c
CONDITIONS: 24V ACIN, 9.75A DC LOAD ON SAME PCB
For more information www.linear.com/LT4320
4320fb
1


Linear Technology Electronic Components Datasheet

LT4320 Datasheet

Ideal Diode Bridge Controller

No Preview Available !

LT4320/LT4320-1
Absolute Maximum Ratings (Notes 1, 2)
Supply Voltages
IN1, IN2..................................................... –3V to 80V
OUTP...................................................... –0.3V to 80V
Output Voltages (Note 3)
BG1, BG2, TG1, TG2................................ –0.3V to 80V
TG1-IN1, TG2-IN2.....................................–0.3V to 12V
Operating Junction Temperature Range
LT4320I.................................................–40°C to 85°C
LT4320H............................................. –40°C to 125°C
LT4320MP.......................................... –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSE, PDIP Packages......................................... 300°C
Pin Configuration
TOP VIEW
IN2 1
8 IN1
TG2 2 9 7 TG1
BG2 3
6 OUTP
BG1 4
5 OUTN
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJC = 5.5°C/W
EXPOSED PAD (PIN 9) MUST BE
CONNECTED TO OUTN (PIN 5)
TOP VIEW
IN2 1
12 IN1
TG2 2
11 TG1
NC 3
NC 4
13
10 NC
9 OUTP
BG2 5
8 NC
BG1 6
7 OUTN
MSE PACKAGE
12-LEAD PLASTIC MSOP
TJMAX = 150°C, θJC = 10°C/W
EXPOSED PAD (PIN 13) MUST BE
CONNECTED TO OUTN (PIN 7)
TOP VIEW
IN2 1
TG2 2
BG2 3
BG1 4
8 IN1
7 TG1
6 OUTP
5 OUTN
N8 PACKAGE
8-LEAD PLASTIC DIP
TJMAX = 150°C, θJC = 45°C/W
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
OPERATING JUNCTION
TEMPERATURE RANGE
LT4320IDD#PBF
LT4320IDD#TRPBF
LGCV
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LT4320HDD#PBF
LT4320HDD#TRPBF
LGCV
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT4320IDD-1#PBF
LT4320IDD-1#TRPBF
LGCW
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LT4320HDD-1#PBF
LT4320HDD-1#TRPBF
LGCW
8-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT4320IMSE#PBF
LT4320IMSE#TRPBF
4320
12-Lead Plastic MSOP
–40°C to 85°C
LT4320HMSE#PBF
LT4320HMSE#TRPBF
4320
12-Lead Plastic MSOP
–40°C to 125°C
LT4320MPMSE#PBF
LT4320MPMSE#TRPBF
4320
12-Lead Plastic MSOP
–55°C to 125°C
LT4320IMSE-1#PBF
LT4320IMSE-1#TRPBF
43201
12-Lead Plastic MSOP
–40°C to 85°C
LT4320HMSE-1#PBF
LT4320HMSE-1#TRPBF
43201
12-Lead Plastic MSOP
–40°C to 125°C
LT4320MPMSE-1#PBF LT4320MPMSE-1#TRPBF
43201
12-Lead Plastic MSOP
–55°C to 125°C
LT4320IN8#PBF
NA
LT4320N8
8-Lead PDIP
–40°C to 85°C
LT4320HN8#PBF
NA
LT4320N8
8-Lead PDIP
–40°C to 125°C
LT4320IN8-1#PBF
NA
LT4320N8-1
8-Lead PDIP
–40°C to 85°C
LT4320HN8-1#PBF
NA
LT4320N8-1
8-Lead PDIP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
4320fb
2 For more information www.linear.com/LT4320


Part Number LT4320
Description Ideal Diode Bridge Controller
Maker Linear Technology
Total Page 14 Pages
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