PowerPath, Ideal Diodes & Load Switches
Analog Devices’ PowerPath, ideal diode controllers, and load switches protect power supplies by minimizing reverse currents back into the supply and shoot-through currents between supplies. Selection of the power source can be either by the highest voltage or highest priority.
For highest voltage selections, ideal diodes are employed in a diode-OR configuration. Applications include redundant supply ORing, supply holdup during input brownout, and reverse battery protection. For selection by highest priority, a prioritized PowerPath controller provides the most general-purpose and flexible solution. A prioritizer powers the system from the highest priority input that is within its valid voltage window. Applications occur in battery-equipped portable products, memory modules with capacitive holdup, and server subsystems with main and auxiliary supplies. Load switches provide reverse current flow protection for space constrained designs.
For highest voltage selections, ideal diodes are employed in a diode-OR configuration. Applications include redundant supply ORing, supply holdup during input brownout, and reverse battery protection. For selection by highest priority, a prioritized PowerPath controller provides the most general-purpose and flexible solution. A prioritizer powers the system from the highest priority input that is within its valid voltage window. Applications occur in battery-equipped portable products, memory modules with capacitive holdup, and server subsystems with main and auxiliary supplies. Load switches provide reverse current flow protection for space constrained designs.
Таблица выбора продукта
Актуальные ресурсы по теме
Заметки разработчика
- DN1036 - Using a Current Sharing Controller with Non-Redundant Supplies
- DN160 - Dual PowerPath™ Controller Simplifi es Power Management
- DN361 - Simple Battery Circuit Extends Power over Ethernet (PoE) Peak Current
- DN386 - Ideal Diode Controller Eliminates Energy Wasting Diodes in Power OR-ing Applications
- DN363 - Replace ORing Diodes with MOSFETs to Reduce Heat and Save Space
- DN356 - Dual Monolithic Ideal Diode Manages Multiple Power Inputs
- DN320 - New ICs Simplify Battery Charging from the USB
- DN519 - Active Bridge Rectifiers Reduce Heat Dissipation within PoE Security Cameras
- DN498 - Supercapacitor-Based Power Backup System Protects Volatile Data in Handhelds when Power Is Lost
- DN487 - Supercapacitor-Based Power Backup Prevents Data Loss in RAID Systems
- DN485 - Complete Energy Utilization Improves Run Time of a Supercap Ride-Through Application by 40%
- DN450 - Supercapacitors Can Replace a Backup Battery for Power Ride-Through Applications
- DN444 - Ideal Diodes Protect Against Power Supply Wiring Errors
- DN1012 - Shrink Solar Panel Size by Increasing Performance
- DN1003 - Ideal Diode Controller Eliminates Energy Wasting Diodes in Power OR-ing Applications
Технические статьи
- High Efficiency Solar MPPT Battery Charger Using LT8611 and AD5245
- Low IQ Ideal Diode Controller with Reverse Input Protection for Automotive and Telecom Power Solutions
- Negative Voltage Ideal Diodes (Diode-OR Controllers)
- LTspice: Using Time-Dependent Exponential Sources to Model Transients
- Primer on PowerPath Controllers, Ideal Diodes & Prioritizers
- Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions
- Using a Current Sharing Controller with Non-Redundant Supplies
- Easy Balanced Load Sharing for Three or Four Supplies, Even with Unequal Supply Voltages
- 18V Buck-Boost Converter with Intelligent PowerPath Control Delivers >2A at 95% Efficiency from Dual Inputs
- Single-IC Supercapacitor-Based Power Supply Backup Solution
- Meet Green Standards in 24VAC and 12VAC Lighting Systems: Replace Halogen Bulbs with LEDs Driven by High Power Factor, High Efficiency Converter
- Active Bridge Rectifiers Reduce Heat Dissipation within PoE Security Cameras
- The Dreaded "File Test" on an LT4320 Ideal Diode Bridge Controller
- 0V to 18V Ideal Diode Controller Saves Watts and Space over Schottky
- Ideal Diode Betters a Schottky by a Factor of Four in Power and Space Consumption
Статьи по применению
Брошюры и бюллетени
PowerPath, Ideal Diodes & Load Switches
| SortOrder | Part# | # of Channels | Vin (min) (V) | Vin (max) (V) | Typical Current Capability (typ) (A) | Ideal Diode | Total Quiescent Current (typ) (A) | Comments | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTC4373 | 1 | 2.5 | 80 | 20 | External, N-Channel, Single | 5µ | Low Quiescent Current Ideal Diode Controller | - |
| 2 | LTC4372 | 1 | 2.5 | 80 | 20 | External, N-Channel, Single | 5µ | Low Quiescent Current Ideal Diode Controller | - |
| 3 | LTC4421 | 2 | 3 | 36 | 20 | Dual, N-Channel | 530µ | High Power Prioritized PowerPath Controller | $3.95 (LTC4421CG#PBF) |
| 4 | LTC4376 | 1 | 4 | 40 | 7 | Internal, N-Channel, Single | 150µ | 7A Ideal Diode with Reverse Input Protection | $2.55 (LTC4376CDHD#PBF) |
| 5 | LTC4418 | 2 | 2.5 | 40 | 5 | Dual, External, P-Channel | 26µ | Dual Channel Prioritized PowerPath Controller | $2.45 (LTC4418CUF#PBF) |
| 6 | LT8672 | 1 | 3 | 42 | 20 | External, N-Channel, Single | 20µ | Active Rectifier Controller with Reverse Protection | $1.95 (LT8672EDDB#TRPBF) |
| 7 | LTC4420 | 2 | 1.8 | 18 | 500m | Dual, Internal, P-Channel | 3.6µ | 18V Dual Input Micropower PowerPath Prioritizer with Backup Supply Monitoring | $2.95 (LTC4420CDD#PBF) |
| 8 | LTC4419 | 2 | 1.8 | 18 | 500m | Dual, Internal, P-Channel | 3.6µ | 18V Dual Input Micropower PowerPath Prioritizer | $2.75 (LTC4419CDD#PBF) |
| 9 | LTC3126 | 2 | 2.4 | 42 | 2.5 | Dual, Internal, N-Channel | 5.5µ | 42V, 2.5A Synchronous Step-Down Regulator with No-Loss Input PowerPath | $3.95 (LTC3126EUFD#PBF) |
| 10 | LTC4371 | 2 | -500 | -4.5 | 20 | Dual, External, N-Channel | 300µ | Dual Negative Voltage Ideal Diode-OR Controller and Monitor | $2.50 (LTC4371CDD#PBF) |
| 11 | LTC4236 | 2 | 2.9 | 18 | 20 | Dual, External, N-Channel | 3.58m | Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor | $4.25 (LTC4236CUFD-1#PBF) |
| 12 | LTC3118 | 1 | 2.2 | 18 | 2 | Dual, Internal, N-Channel | 50µ | 18V, 2A Buck-Boost DC/DC Converter with Low-Loss Dual Input PowerPath | $5.75 (LTC3118EUFD#PBF) |
| 13 | LTC4235 | 2 | 9 | 14 | 20 | Dual, External, N-Channel | 3.64m | Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor | $3.95 (LTC4235CUFD-1#PBF) |
| 14 | ADP1290 | 1 | 2.3 | 13.2 | 2 | Load Switch | 15µ | 12 V, 2 A Logic Controlled High-Side Power Switch | $0.88 (ADP1290ACBZ-R7) |
| 15 | LTC4229 | 1 | 2.9 | 18 | 20 | External, N-Channel, Single | 2.53m | Ideal Diode and Hot Swap Controller | $2.95 (LTC4229CG#PBF) |
| 16 | LT4321 | 2 | 20 | 80 | 20 | Dual Bridges with External N-Channel | 500µ | PoE Ideal Diode Bridge Controller | $1.48 (LT4321IUF#PBF) |
| 17 | ADP1190A | 4 | 1.4 | 3.6 | 500m | Load Switch | - | Integrated 500 mA Load Switch with Quad Signal Switch | $0.60 (ADP1190AACBZ-R7) |
| 18 | LT4320-1 | 1 | 9 | 72 | 20 | Single Bridge with External N-Channel | 1.3m | Ideal Diode Bridge Controller - DC to 600Hz | $3.25 (LT4320IMSE-1#PBF) |
| 19 | LT4320 | 1 | 9 | 72 | 20 | Single Bridge with External N-Channel | 1.3m | Ideal Diode Bridge Controller - DC to 60Hz | $2.95 (LT4320IDD#PBF) |
| 20 | ADP1196 | 1 | 0 | 5.5 | 3 | Load Switch | 26µ | 5 V, 3 A Logic Controlled High-Side or Low-Side Load Switch | $0.50 (ADP1196ACBZ-02-R7) |
| 21 | LTC4417 | 3 | 2.5 | 36 | 5 | External, P-Channel, Triple | 28µ | Prioritized PowerPath Controller with -42V Reverse Input Protection | $3.05 (LTC4417CUF#PBF) |
| 22 | ADP196 | 1 | 1.8 | 5.5 | 3 | Load Switch | 25µ | 5 V, 3 A, Logic Controlled High-Side Power Switch | $0.50 (ADP196ACBZ-01-R7) |
| 23 | ADP1190 | 4 | 1.4 | 3.6 | 500m | Load Switch | - | Integrated 500 mA Load Switch with Quad Signal Switch | $0.60 (ADP1190ACBZ-R7) |
| 24 | LTC4228 | 2 | 2.9 | 18 | 20 | Dual, External, N-Channel | 2.95m | Dual ideal diode and hot swap controller, -1 Latchoff, -2 Auto-Retry | $3.59 (LTC4228CGN-1#PBF) |
| 25 | LTC4370 | 2 | 0 | 18 | 20 | Dual, External, N-Channel | 2.25m | Two-Supply Diode-OR Current Balancing Controller | $4.95 (LTC4370CDE#PBF) |
| 26 | LTC4364 | 1 | 4 | 80 | 20 | External, N-Channel, Single | 483µ | Ride-through protection with ideal diode, Adjustable output-clamp and circuit-breaker with timer, Sh | $3.45 (LTC4364CDE-1#PBF) |
| 27 | LTC4359 | 1 | 4 | 80 | 20 | External, N-Channel, Single | 150µ | Ideal Diode Controller with -40V Reverse Input Protection | $2.10 (LTC4359CDCB#TRPBF) |
| 28 | LTC4353 | 2 | 0 | 18 | 20 | Dual, External, N-Channel | 1.6m | Dual Low Voltage Ideal Diode Controller | $3.45 (LTC4353CDE#PBF) |
| 29 | ADP199 | 1 | 900m | 3.6 | 500m | Load Switch | 3µ | 3.6 V, 500 mA Logic Controlled High-Side Load Switch | $0.32 (ADP199ACBZ-R7) |
| 30 | LTC4415 | 2 | 1.7 | 5.5 | 4 | Dual, Internal, P-Channel | 44µ | Dual 4A Ideal Diodes with Adjustable Current Limit, Imon Outputs, Overcurrent Warning, Thermal Warni | $2.95 (LTC4415EDHC#PBF) |
| 31 | LTC3226 | 1 | 2.5 | 5.5 | 315m | External, P-Channel, Single | 55µ | 2-Cell Supercapacitor Charger with Backup PowerPath Controller | $2.67 (LTC3226EUD#PBF) |
| 32 | ADP198 | 1 | 1.65 | 6.5 | 1 | Load Switch | 2.5µ | Logic Controlled, 1 A, High-Side Load Switch with Reverse Current Blocking | $0.35 (ADP198ACBZ-11-R7) |
| 33 | ADP194 | 1 | 1.1 | 3.6 | 500m | Load Switch | - | Logic Controlled, High-Side Power Switch | $0.32 (ADP194ACBZ-R7) |
| 34 | LTC4227 | 2 | 2.9 | 18 | 20 | Dual, External, N-Channel | 3.3m | Dual ideal diode-OR and single hot swap controller, Options for latchoff/auto-Retry and 100ms/1.6ms | $3.41 (LTC4227CGN-1#PBF) |
| 35 | ADP197 | 1 | 1.8 | 5.5 | 3 | Load Switch | 18µ | 5 V, 3 A Logic Controlled High-Side Power Switch | $0.46 (ADP197ACBZ-01-R7) |
| 36 | ADP195 | 1 | 1.1 | 3.6 | 1.1 | Load Switch | 1µ | Logic Controlled, High-Side Power Switch with Reverse Current Blocking | $0.35 (ADP195ACBZ-R7) |
| 37 | ADP191 | 1 | 1.1 | 3.6 | 500m | Load Switch | - | Logic Controlled, High-Side Power Switch with Reverse Current Blocking | $0.32 (ADP191ACBZ-R7) |
| 38 | ADP190 | 1 | 1.2 | 3.6 | 500m | Load Switch | - | Logic Controlled, High-Side Power Switch with Reverse Current Blocking | $0.33 (ADP190ACBZ-R7) |
| 39 | LTC4358 | 1 | 9 | 26.5 | 5 | Internal, N-Channel, Single | 780µ | 5A Ideal Diode | $2.10 (LTC4358CDE#PBF) |
| 40 | LTC4352 | 1 | 0 | 18 | 20 | External, N-Channel, Single | 1.47m | Low Voltage Ideal Diode Controller with Monitoring | $2.50 (LTC4352CDD#PBF) |
| 41 | LTC4357 | 1 | 9 | 80 | 20 | External, N-Channel, Single | 930µ | Positive High Voltage Ideal Diode Controller | $1.70 (LTC4357CDCB#TRPBF) |
| 42 | LTC4355 | 2 | 9 | 80 | 20 | Dual, External, N-Channel | 2.6m | Positive High Voltage Dual Ideal Diode-OR with Input Supply and Fuse Monitors | $2.50 (LTC4355CDE#PBF) |
| 43 | LTC4416 | 2 | 3.6 | 36 | 20 | Dual, External, P-Channel | 70µ | 36V, Low Loss Dual PowerPath Controllers for Large PFETs | $2.45 (LTC4416EMS#PBF) |
| 44 | LTC4413-2 | 2 | 2.6 | 5.5 | 2.6 | Dual, Internal, P-Channel | 40µ | Dual 2.6A, 2.5V to 5.5V Fast Ideal Diodes in a 3mm x 3mm DFN, Overvoltage Protection Sensor with Dri | $2.25 (LTC4413EDD-2#PBF) |
| 45 | LTC4413-1 | 2 | 2.6 | 5.5 | 2.6 | Dual, Internal, P-Channel | 40µ | Dual 2.6A, 2.5V to 5.5V Fast Ideal Diodes in a 3mm x 3mm DFN | $2.15 (LTC4413EDD-1#PBF) |
| 46 | LTC2952 | 2 | 2.7 | 28 | 5 | Dual, External, P-Channel | 65µ | Pushbutton PowerPath Controller with Supervisor | $2.95 (LTC2952CF#PBF) |
| 47 | LTC4414 | 1 | 3 | 36 | 20 | External, P-Channel, Single | 36µ | 36V, Low Loss PowerPath Controller for Large PFETs | $1.85 (LTC4414EMS8#PBF) |
| 48 | LTC4413 | 2 | 2.5 | 5.5 | 2.6 | Dual, Internal, P-Channel | 25µ | Dual 2.6A, 2.5V to 5.5V, Ideal Diodes in 3mm × 3mm DFN | $2.15 (LTC4413EDD#PBF) |
| 49 | LTC4354 | 2 | -80 | -4.5 | 10 | Dual, External, N-Channel | 1.2m | Dual Negative Voltage Ideal Diode-OR Controller and Monitor | $1.95 (LTC4354CS8#PBF) |
| 50 | LTC4412HV | 1 | 2.5 | 36 | 5 | External, P-Channel, Single | 18µ | Rugged version of the LTC4412: Vin up to 36V | $1.76 (LTC4412HVIS6#TRPBF) |
| 51 | LTC4411 | 1 | 2.6 | 5.5 | 2.6 | Internal, P-Channel, Single | 40µ | Integrated switch: Replaces power supply OR | $1.66 (LTC4411ES5#TRPBF) |
| 52 | LT4351 | 1 | 1.2 | 18 | 10 | External, N-Channel | 1.41m | MOSFET Diode-OR Controller | $2.50 (LT4351CMS#PBF) |
| 53 | LTC4412 | 1 | 2.5 | 28 | 5 | External, P-Channel, Single | 15µ | Replaces power supply OR | $1.36 (LTC4412ES6#TRPBF) |
| 54 | LTC4410 | 1 | 4.35 | 5.5 | 500m | External, P-Channel, Single | 500µ | Allows faster charging from USB port and complies with USB spec. | $1.26 (LTC4410ES6#TRPBF) |
| 55 | LTC1473L | 2 | 4.75 | 30 | 5 | Dual, External, N-Channel | 100µ | Power path management for multiple DC sources. 3.3V to 10V input. all N-Channel MOSFETs for low los | $3.55 (LTC1473LCGN#PBF) |
| 56 | LTC1479 | 3 | 6 | 28 | 5 | External, N-Channel, Triple | 175µ | Triple PowerPath Controller for Dual Battery Systems and AC/DC | $7.05 (LTC1479CG#PBF) |
| 57 | LTC1473 | 2 | 4.75 | 30 | 5 | Dual, External, N-Channel | 100µ | Dual, High Gate Drive | $3.55 (LTC1473CGN#PBF) |
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