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MAX17597

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Peak-Current-Mode Controllers for Flyback and Boost Regulators

Enable Compact, Cost-Effective, and Highly Flexible Isolated/Nonisolated Power Supplies

Printable Data Sheet

Product Details

See parametric specs for Step-Up Switching Regulators

Key Features

See parametric specs for Step-Up Switching Regulators

Parametric specs for Step-Up Switching Regulators

V_IN (V) (min)	4.5
V_IN (V) (max)	36
V_OUT1 (V) (min)	5
V_OUT1 (V) (max)	250
I_OUT1 (A) (max)	4
Switch Type	External
Output Adjust. Method	Resistor
Power Good Signal	Yes
I_Q (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)	1.08

See parametric specs for Step-Up Switching Regulators

View Less

Simplified Block Diagram

Other products you might be interested in

Part No.	Description
MAX17500	Current-Mode PWM Controllers with Programmable Switching Frequency
MAX17499	Current-Mode PWM Controllers with Programmable Switching Frequency

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
User Guide	EE-SIM Design and Simulation Environment User Guide
App Note	Using a Peak-Current-Mode Controller to Design a Boost Converter

Design & Development

Click any title below to view the detail page where available.

Hardware Development

Evaluation Board

MAX17595EVKIT

Data Sheet

Description/Applications

The MAX17595 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains MAX17595 peak-current-mode controller for a flyback regulator. The EV kit is configured for an isolated 15V DC output voltage that can supply up to 1.5A current. The line input voltage range is from 85V AC to 265V AC or 120V DC to 375V DC.

The EV kit demonstrates low quiescent current and efficiency up to 86%. This high efficiency is achieved by using a single-transistor (MOSFET) flyback converter topology that operates at 120kHz switching frequency. The surface-mount transformer has a tertiary winding to power the IC after startup. An optocoupler, along with the transformer, provides galvanic isolation up to 3500V_RMS.

Warning: The EV kit is designed to operate with high voltages. Dangerous voltages are present on this EV kit and on equipment connected to it. Users who power up this EV kit or the power sources connected to it must be careful to follow safety procedures appropriately to work with high-voltage electrical equipment.

Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this EV kit with care to avoid possible personal injury.

View Details

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 3500V_RMS
120kHz Switching Frequency
Efficiency Up to 86%
Low-Cost Flyback Design
Proven PCB Layout
Fully Assembled and Tested

Evaluation Board

MAX17597EVKIT

Data Sheet

Description/Applications

The MAX17597 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board to evaluate the MAX17597 peak-current-mode controller in a step-up (boost) configuration. The EV kit output is configured for 24V output voltage that can supply up to 1A of current. The input voltage range is from 8V to 14V.

High efficiency up to 95.6% is achieved using a boost converter operating at a switching frequency of 600kHz, providing an output power up to 24W.

View Details

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

Evaluation Board

MAX17597FBEVKIT

Data Sheet

Description/Applications

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 1500V_RMS.

View Details

Features

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 1500V_RMS
Proven PCB Layout
Fully Assembled and Tested

Evaluation Board

MAX17596EVKIT

Data Sheet

Description/Applications

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 1500V_RMS.

View Details

Features

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 1500V_RMS
Proven PCB Layout
Fully Assembled and Tested

SYSTEM BOARD

MAXREFDES1256: 49W DC-DC Flyback Converter Using MAX17597

SYSTEM BOARD

MAXREFDES1257: 24W/48V DC-DC Boost Converter Using the MAX17597 Peak-Current-Mode Controller

Evaluation Board

MAX17595EVKIT

Data Sheet

Description/Applications

View Details

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 3500V_RMS
120kHz Switching Frequency
Efficiency Up to 86%
Low-Cost Flyback Design
Proven PCB Layout
Fully Assembled and Tested

Evaluation Board

MAX17597EVKIT

Data Sheet

Description/Applications

High efficiency up to 95.6% is achieved using a boost converter operating at a switching frequency of 600kHz, providing an output power up to 24W.

View Details

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

Evaluation Board

MAX17597FBEVKIT

Data Sheet

Description/Applications

View Details

Features

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 1500V_RMS
Proven PCB Layout
Fully Assembled and Tested

Evaluation Board

MAX17596EVKIT

Data Sheet

Description/Applications

View Details

Features

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 1500V_RMS
Proven PCB Layout
Fully Assembled and Tested

SYSTEM BOARD

MAXREFDES1256: 49W DC-DC Flyback Converter Using MAX17597

SYSTEM BOARD

MAXREFDES1257: 24W/48V DC-DC Boost Converter Using the MAX17597 Peak-Current-Mode Controller

Tools & Models

EE-Sim: Design & Simulate MAX17597

Create Design

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Parameters

Parametric specs for Step-Up Switching Regulators

V_IN (V) (min)	4.5
V_IN (V) (max)	36
V_OUT1 (V) (min)	5
V_OUT1 (V) (max)	250
I_OUT1 (A) (max)	4
Switch Type	External
Output Adjust. Method	Resistor
Power Good Signal	Yes
I_Q (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	generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=2775', '')
Package/Pins	TQFN-CU/16
Budgetary Price (See Notes)	1.08

See parametric specs for Step-Up Switching Regulators

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.

Simplified Block Diagram

MAX17595, MAX17596, MAX17597:Startup Circuits

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
User Guide	EE-SIM Design and Simulation Environment User Guide
App Note	Using a Peak-Current-Mode Controller to Design a Boost Converter

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

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INTERACTIVE Data Sheet

MAX17597

Peak-Current-Mode Controllers for Flyback and Boost Regulators

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

Other products you might be interested in

Technical Docs

Design & Development

EE-Sim: Design & Simulate MAX17597

EE-Sim: Design & Simulate MAX17597

Support & Training

Parameters

Key Features

Applications/Uses

Description

Simplified Block Diagram

Technical Docs

Support & Training

MAX17597 Related Videos