| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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26,666 pcs
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26666 pcs | On Request | 1 | On Request | On Request | 21+ | On Request | On Request |
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| Fault Protection | |
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| Internal Switch(s) | |
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The UCC28740D from Texas Instruments is an AC/DC switching regulator designed for flyback power supply applications. This controller provides Constant-Voltage (CV) regulation using optocoupled feedback for improved transient response and Constant-Current (CC) regulation through Primary-Side Regulation (PSR) techniques.
Key features include a low no-load power capability of less than 10-mW, enabling energy-efficient designs. It achieves precise control with ±1% voltage regulation and ±5% current regulation across varying line and load conditions. The device incorporates a 700-V startup switch and operates at a maximum switching frequency of 100 kHz, facilitating high-power-density charger designs.
Designed for ease of EMI compliance, the UCC28740D utilizes frequency dithering and resonant-ring valley-switching operation for high overall efficiency. It also includes clamped gate-drive output for MOSFET protection against overvoltage, low-line, and overcurrent conditions.
The UCC28740D is available in a 7-SOIC package and is suitable for surface mount applications. Its operating temperature range is -40°C to 125°C (TJ).
| Qty | Low | High |
|---|---|---|
| 1+ | $0.50 | $0.50 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
9V to 35V.
-40°C to 125°C (junction).
7-SOIC (8-SOIC with 7 leads).
170Hz to 100kHz.
No, it requires an external MOSFET.
Current limiting and over-voltage protection.
Less than 10 mW.