Peak-current-mode flyback controller supports low-voltage DC-DC power supplies over a 4.5V to 36V input range. The controller drives an external n-channel MOSFET and provides programmable 100kHz to 1MHz switching with optional synchronization. Integrated protection includes adjustable current limit, cycle-by-cycle peak current limiting, hiccup-mode short-circuit protection, input overvoltage protection, soft-start, slope compensation, and thermal shutdown. The orderable variants use a 16-pin TQFN exposed-pad package and operate from -40°C to +125°C.
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| Controller topology | Low-voltage DC-DC flyback controller |
| Control method | Peak current mode |
| Input voltage range | 4.5 to 36V |
| VIN bootstrap UVLO wakeup | 4.1 typicalV |
| VIN bootstrap UVLO shutdown | 3.9 typicalV |
| Switching frequency range | 100 to 1000kHz |
| Switching frequency accuracy | ±8% |
| Maximum duty cycle | 48 typical% |
| VDRV output voltage | 4.9 typicalV |
| VDRV current limit | 70 minimum, 100 typicalmA |
| Cycle-by-cycle peak current-limit threshold | 305 typicalmV |
| Runaway current-limit threshold | 360 typicalmV |
| Current-sense leading-edge blanking time | 70ns |
| Minimum on-time | 130 typicalns |
| Soft-start charging current | 10 typicalµA |
| FB reference voltage | 1.21 typicalV |
| Operating temperature range | -40 to +125°C |
| Package | 16 TQFN-EP |
| RoHS | Lead(Pb)-free/RoHS-compliant package for + suffix orderable models |
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These are design resources that include the Analog Devices MAX17596
A reference design for a 2W DCM flyback converter using the MAX17596 controller, featuring 17V-36V input and 5V/0.4A output with 86.25% efficiency.
A design document for a 2.4W DCM flyback converter using the MAX17596, providing 24V at 100mA from a 19V-29V DC input with 87.8% efficiency.
