MAXREFDES1189
Reference Guide
Description
The MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulators. The MAX17595 offers optimized input thresholds for universal input AC-DC converters and telecom DC-DC (36V to 72V input range) power supplies. It contains a built-in gate driver for an external n-channel MOSFET. The MAX17595 houses 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 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 ensure 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.
Features
- Programmable Switching Frequency Allows Optimization of the Magnetic and Filter Components, Resulting in Compact, Cost-Effective, Efficient Isolated/Nonisolated 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
- 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
Designed, Built, Tested
Board pictured here has been fully assembled and tested. Not available for sale.
Schematic
PCB Layout
BOM
Test Results
Parametrics
| Input Type | Vin(Min) | Vin(Max) | Iout(Max) | Single/Multiple Output | Vout(V) | Pout(W) | Isolated/Non-Isolated | Topology |
|---|---|---|---|---|---|---|---|---|
| AC | 176 | 284 | 0.313 | - | 24 | 7.5 | Isolated | Flyback |
Parametrics
| Input Type | AC |
| Vin(Min) | 176 |
| Vin(Max) | 284 |
| Iout(Max) | 0.313 |
| Single/Multiple Output | - |
| Vout(V) | 24 |
| Pout(W) | 7.5 |
| Isolated/Non-Isolated | Isolated |
| Topology | Flyback |
Maxim Devices (1)
Part Number
|
Name
|
Product Family
|
Order
|
Design kits and evaluation modules |
|---|---|---|---|---|
| MAX17595 | Peak-Current-Mode Controllers for Flyback and Boost Regulators | Isolated Power | Buy Now | Design Kits |
Maxim Devices (1)
| Part Number
|
Product Family
|
|---|---|
|
Isolated Power
Peak-Current-Mode Controllers for Flyback and Boost Regulators
|
Design Files (5)
| Title
|
Type
|
Size
|
Date
|
|---|---|---|---|
 maxrefdes1189_schematic |
273KB | 2018-08-04 | |
| TTS MAXREFDES Test Results Template_Rev 0_0318 |
469KB | 2018-08-04 | |
| maxrefdes1189_pcb |
1MB | 2018-08-04 | |
| maxrefdes1189_bom |
66KB | 2018-08-04 | |
| MAXREFDES1189 - 7.5W 24V Offline Flyback Converter Using the MAX17595 |
511KB | 2019-07-09 |
| Date
|
Type
|
|---|---|
| 2018-08-04 |
(PDF, 273KB) |
| 2018-08-04 |
(PDF, 469KB) |
| 2018-08-04 |
(PDF, 1MB) |
| 2018-08-04 |
(PDF, 66KB) |
| 2019-07-09 |
(PDF, 511KB) |
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