Power
High efficiency AC/DC adapter reference design
The fully tested, USB power delivery reference design from Texas Instruments is a high efficiency, high power density, AC/DC adapter solution with a wide input voltage range (85 to 265VAC) for laptop adapters and smartphone charger applications. It adopts active-clamp-flyback topology controlled by TI’s newest ACF controller UCC28780 as the mainly power supply stage.
This design uses TPS25740B, TI’s PD source controller, to achieve a full PD 2.0 function. The design achieves a peak efficiency of 94% at a very high switching frequency. The design’s power density is increased to 30 W/in3, which is much higher than traditional solutions.
Features
- High efficiency (94% peak value).
- High power density (30W/in³).
- Low no load power consumption (60mW).
- Low light load input power (0.5W), @20Vout/0.25W output.
- Fully compatible with USB PD 2.0 standard, with 5V/3A, 9V/3A, 15V/3A, 20V/3.25A output.
- Active-clamp flyback + SR topology.
- Small size (62mm*28.6mm*18.4mm).
To find out more, click here.
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