MAX17596
Peak-Current-Mode Controllers for Flyback and Boost Regulators
Enable Compact, Cost-Effective, and Highly Flexible Isolated/Nonisolated Power Supplies
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The MAX17595/MAX17596/MAX17597 is a family of peak-current-mode controllers for design of wide input-voltage flyback and boost regulators. The MAX17595 offers optimized input thresholds for universal input AC-DC converters and telecom DC-DC (36V to 72V input range) power supplies. The MAX17596/MAX17597 offer input thresholds suitable for low-voltage DC-DC applications (4.5V to 36V). The MAX17597 implements a boost converter. All three controllers contain a built-in gate driver for external n-channel MOSFETs.
The MAX17595/MAX17596/MAX17597 house an internal error amplifier with 1% accurate reference, eliminating the need for an external reference. The switching frequency is programmable from 100kHz to 1MHz with an accuracy of 8%, allowing optimization of magnetic and filter components, resulting in compact and cost-effective power conversion. For EMI-sensitive applications, the MAX17595/MAX17596/MAX17597 family incorporates a programmable frequency dithering scheme, enabling low-EMI spread-spectrum operation.
Users can start the power supply precisely at the desired input voltage, implement input overvoltage protection, and program soft-start time. A programmable slope compensation scheme is provided to ensuree stability of the peak-current-mode control scheme.
Hiccup-mode overcurrent protection and thermal shutdown are provided to minimize dissipation in overcurrent and overtemperature fault conditions.
Key Features
- Programmable Switching Frequency Allows Optimization of the Magnetic and Filter Components, Resulting in Compact, Cost-Effective, Efficient Isolated/Non-Isolated Power Supplies
- 100kHz to 1MHz Programmable Switching Frequency with Optional Synchronization
- Peak Current Mode Control Provides Excellent Transient Response
- Offline (Universal Input AC) and Telecom (36V to 72V) Flyback Controller—MAX17595
- DC-DC (4.5V to 36V) Flyback Controller—MAX17596
- Nonsynchronous (4.5V to 36V) Boost PWM Controller—MAX17597
- 3mm x 3mm TQFN Package
- Programmable Frequency Dithering Enables Low-EMI Spread-Spectrum Operation
- Integrated Protection Features Enhance System Reliability
- Adjustable Current Limit with External Current-Sense Resistor
- Fast Cycle-By-Cycle Peak Current Limiting
- Hiccup-Mode Short-Circuit Protection
- Overtemperature Protection
- Programmable Soft-Start and Slope Compensation
- Input Overvoltage Protection
Applications/Uses
- Battery-Powered Applications
- Industrial and Telecom Applications
- Universal Input Offline AC-DC Power Supplies
- Wide-Range DC-Input Flyback/Boost Battery Chargers
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| Topology | Flyback |
| Application (VIN) | Base Station (24V) Industrial (24V) |
| Control Loop | Current Mode |
| Feedback | Linear Opto |
| Switching Frequency (kHz) | 1000 |
| Duty Cycle (%) (max) | 48 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | $0.92 @1k |
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| VOUT1 (V) (min) | 5 |
| VOUT1 (V) (max) | 250 |
| IOUT1 (A) (max) | 4 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| Power Good Signal | Yes |
| ICC (mA) (typ) | 2 |
| Shutdown Mode Supply Current (µA) (typ) | 20 |
| Shutdown Mode Supply Current (µA) (max) | 32 |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 1000 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | $0.92 @1k |
Technical Docs
| Data Sheet | Peak-Current-Mode Controllers for Flyback and Boost Regulators | Jun 26, 2017 | |
| User Guide | EE-SIM Design and Simulation Environment User Guide | ||
| App Note | Designing Flyback Converters Using Peak-Current-Mode Controllers |
Click any title below to view the detail page where available.
Description
Features
- 85V AC to 265V AC or 120V DC to 375V DC Input Range
- 15V DC at 1.5A Isolated Output Voltage
- Galvanic Isolation Up to 3500VRMS
- 120kHz Switching Frequency
- Efficiency Up to 86%
- Low-Cost Flyback Design
- Proven PCB Layout
- Fully Assembled and Tested
Description
Features
- 8V to 14V Input Range
- Output Voltage: 24V at 1A
- 600kHz Switching Frequency
- Efficiency Up to 95.6%
- Low-Cost Boost Converter Design
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX17597 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates an isolated 20W flyback DC-DC converter. The circuit uses the device’s peak-current-mode controller in a 16-pin TQFN package with an exposed pad. The EV kit demonstrates the IC’s cycle-by-cycle current-limit, soft-start, and EN/UVLO features.
The EV kit circuit output is configured for an isolated 24V and provides up to 833mA of output current. The EV kit is configured to operate at a 200kHz switching frequency. An optocoupler, along with the transformer, provides galvanic isolation between input and output, up to 1500VRMS.
View DetailsFeatures
- 18V to 36V Input Range
- Isolated Output: 24V DC at 20W
- Cycle-by-Cycle Current Limit
- Resistor Programmable UVLO/OVI Threshold
- Low-Cost Flyback Design
- Galvanic Isolation Up to 1500VRMS
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX17596 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates an isolated 20W fly-back DC-DC converter. The circuit uses the device’s peak current-mode controller in a 16-pin TQFN package with an exposed pad. The EV kit demonstrates the IC’s cycle-by-cycle current limit, soft-start, and EN/ UVLO features.
The EV kit circuit output is configured for an isolated +24V and provides up to 833mA of output current. The EV kit is configured to operate at a 200kHz switching frequency. An optocoupler, along with the transformer, provides galvanic isolation between the input and output, up to 1500VRMS.
View DetailsFeatures
- 18V to 36V Input Range
- Isolated Output: 24V DC at 20W
- Cycle-by-Cycle Current Limit
- Resistor Programmable UVLO/OVI Threshold
- Low-Cost Flyback Design
- Galvanic Isolation Up to 1500VRMS
- Proven PCB Layout
- Fully Assembled and Tested
 | Tools & Models EE-Sim: Design & Simulate MAX17596 | Create Design |
| SIMULATION MODELS MAX17596 SIMPLIS Model | Download |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| Topology | Flyback |
| Application (VIN) | Base Station (24V) Industrial (24V) |
| Control Loop | Current Mode |
| Feedback | Linear Opto |
| Switching Frequency (kHz) | 1000 |
| Duty Cycle (%) (max) | 48 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | $0.92 @1k |
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| VOUT1 (V) (min) | 5 |
| VOUT1 (V) (max) | 250 |
| IOUT1 (A) (max) | 4 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| Power Good Signal | Yes |
| ICC (mA) (typ) | 2 |
| Shutdown Mode Supply Current (µA) (typ) | 20 |
| Shutdown Mode Supply Current (µA) (max) | 32 |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 1000 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | $0.92 @1k |
Key Features
- Programmable Switching Frequency Allows Optimization of the Magnetic and Filter Components, Resulting in Compact, Cost-Effective, Efficient Isolated/Non-Isolated Power Supplies
- 100kHz to 1MHz Programmable Switching Frequency with Optional Synchronization
- Peak Current Mode Control Provides Excellent Transient Response
- Offline (Universal Input AC) and Telecom (36V to 72V) Flyback Controller—MAX17595
- DC-DC (4.5V to 36V) Flyback Controller—MAX17596
- Nonsynchronous (4.5V to 36V) Boost PWM Controller—MAX17597
- 3mm x 3mm TQFN Package
- Programmable Frequency Dithering Enables Low-EMI Spread-Spectrum Operation
- Integrated Protection Features Enhance System Reliability
- Adjustable Current Limit with External Current-Sense Resistor
- Fast Cycle-By-Cycle Peak Current Limiting
- Hiccup-Mode Short-Circuit Protection
- Overtemperature Protection
- Programmable Soft-Start and Slope Compensation
- Input Overvoltage Protection
Applications/Uses
- Battery-Powered Applications
- Industrial and Telecom Applications
- Universal Input Offline AC-DC Power Supplies
- Wide-Range DC-Input Flyback/Boost Battery Chargers
Description
The MAX17595/MAX17596/MAX17597 is a family of peak-current-mode controllers for design of wide input-voltage flyback and boost regulators. The MAX17595 offers optimized input thresholds for universal input AC-DC converters and telecom DC-DC (36V to 72V input range) power supplies. The MAX17596/MAX17597 offer input thresholds suitable for low-voltage DC-DC applications (4.5V to 36V). The MAX17597 implements a boost converter. All three controllers contain a built-in gate driver for external n-channel MOSFETs.
The MAX17595/MAX17596/MAX17597 house an internal error amplifier with 1% accurate reference, eliminating the need for an external reference. The switching frequency is programmable from 100kHz to 1MHz with an accuracy of 8%, allowing optimization of magnetic and filter components, resulting in compact and cost-effective power conversion. For EMI-sensitive applications, the MAX17595/MAX17596/MAX17597 family incorporates a programmable frequency dithering scheme, enabling low-EMI spread-spectrum operation.
Users can start the power supply precisely at the desired input voltage, implement input overvoltage protection, and program soft-start time. A programmable slope compensation scheme is provided to ensuree stability of the peak-current-mode control scheme.
Hiccup-mode overcurrent protection and thermal shutdown are provided to minimize dissipation in overcurrent and overtemperature fault conditions.
Technical Docs
| Data Sheet | Peak-Current-Mode Controllers for Flyback and Boost Regulators | Jun 26, 2017 | |
| User Guide | EE-SIM Design and Simulation Environment User Guide | ||
| App Note | Designing Flyback Converters Using Peak-Current-Mode Controllers |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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