LT4320/LT4320-1 - Ideal Diode Bridge Controller
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.
Features
Typical Application  | Applications
Packaging   |
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LT4320HDD-1#PBF | 3x3 DFN-8 | H | $5.36 | $3.75 |
| LT4320HDD-1#TRPBF | 3x3 DFN-8 | H | $5.42 | $3.81 |
| LT4320HDD#PBF | 3x3 DFN-8 | H | $4.93 | $3.45 |
| LT4320HDD#TRPBF | 3x3 DFN-8 | H | $4.99 | $3.51 |
| LT4320HMSE-1#PBF | MS-12E | H | $5.36 | $3.75 |
| LT4320HMSE-1#TRPBF | MS-12E | H | $5.42 | $3.81 |
| LT4320HMSE#PBF | MS-12E | H | $4.93 | $3.45 |
| LT4320HMSE#TRPBF | MS-12E | H | $4.99 | $3.51 |
| LT4320HN8-1#PBF | N-8 | H | $6.51 | $4.56 |
| LT4320HN8#PBF | N-8 | H | $6.10 | $4.27 |
| LT4320IDD-1#PBF | 3x3 DFN-8 | I | $4.64 | $3.25 |
| LT4320IDD-1#TRPBF | 3x3 DFN-8 | I | $3.31 | |
| LT4320IDD#PBF | 3x3 DFN-8 | I | $4.21 | $2.95 |
| LT4320IDD#TRPBF | 3x3 DFN-8 | I | $3.01 | |
| LT4320IMSE-1#PBF | MS-12E | I | $4.64 | $3.25 |
| LT4320IMSE-1#TRPBF | MS-12E | I | $3.31 | |
| LT4320IMSE#PBF | MS-12E | I | $4.21 | $2.95 |
| LT4320IMSE#TRPBF | MS-12E | I | $3.01 | |
| LT4320IN8-1#PBF | N-8 | I | $5.64 | $3.95 |
| LT4320IN8#PBF | N-8 | I | $5.21 | $3.65 |
| LT4320MPMSE-1#PBF | MS-12E | MP | $13.93 | $9.75 |
| LT4320MPMSE-1#TRPBF | MS-12E | MP | $13.99 | $9.81 |
| LT4320MPMSE#PBF | MS-12E | MP | $12.64 | $8.85 |
| LT4320MPMSE#TRPBF | MS-12E | MP | $12.70 | $8.91 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC1823B | LT4320IDD Demo Board | 1.2kW Ideal Diode Bridge Full-Wave Rectifier [9V to 40V, 30A] | $75.00 |
| DC1902B | LT4320IDD Demo Board | 200W Ideal Diode Bridge Full-Wave Rectifier [9V to 60V, 3.5A] | $75.00 |
| DC2047A-A | LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX | $95.00 |
| DC2465A | LT4320IDD-1 3-Phase Ideal Diode Bridge Rectifier [9VAC to 48VAC L-L, 25A] | $125.00 |
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