| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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410 pcs
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410 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The MAX5974AETE+T from Analog Devices Inc./Maxim Integrated is an active-clamped, current-mode PWM controller specifically designed for Power-over-Ethernet (PoE) powered device (PD) applications. It supports wide input voltage ranges and is suitable for universal or telecom input ranges, with some variants accommodating lower input voltages down to 10.5V.
Key features include programmable dead time for zero-voltage switching (ZVS), frequency foldback for light-load efficiency, and a unique feed-forward maximum duty-cycle clamp. The device offers programmable switching frequencies from 100kHz to 600kHz, with synchronization up to 1.2MHz, and programmable frequency dithering for low-EMI operation. It also includes features like PWM soft-start, current slope compensation, and output short-circuit protection with hiccup mode.
The MAX5974A/B variants provide output regulation without an optocoupler, utilizing an internal error amplifier with a 1% reference. The MAX5974C/D variants use traditional optocoupler feedback. The controller is available in a 16-pin TQFN-EP package and is rated for operation across wide temperature ranges, from -40°C to +85°C and -40°C to +125°C.
This controller is well-suited for applications such as IP phones, wireless access nodes, and security cameras that require efficient DC-DC conversion in PoE environments. Its robust feature set enhances supply efficiency and reliability.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.57 | $1.57 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The MAX5974AETE+T is offered in a 16-lead TQFN-EP (thin quad flat no-lead with exposed pad) package.
The device is rated for operation over -40°C to +85°C and -40°C to +125°C temperature ranges.
The switching frequency is programmable from 100kHz to 600kHz, with synchronization up to 1.2MHz.
The maximum duty cycle clamp is 80%.
The typical startup supply current is 100μA.
The internal leading-edge blanking time is 115ns typical.
The typical propagation delay for cycle-by-cycle peak current limiting is 35ns.