A brand new low-resistance MOSFET reduces warmth loss and area utilization, making it excellent for smartphones and different fast-charging compact digital units.
Rohm has launched a brand new ultra-compact energy MOSFET design for sooner charging of digital units. The AW2K21 design meets space-saving options with diminished ON-resistance, making it excellent for smartphones, wearables, tablets, and related high-current functions.
Quick charging requires strong safety and environment friendly present dealing with. Conventional designs sometimes contain two giant MOSFETs to handle bidirectional safety and minimise energy loss. Nevertheless, this strategy will increase each board area and design complexity.
This new chip integrates two MOSFETs right into a single compact 2.0 mm × 2.0 mm moulded package deal. It helps bidirectional present management and provides an industry-leading ON-resistance of simply 2.0 mΩ (typical), together with a most present ranking of 20 A and voltage tolerance as much as 30 V.
It provides to a rise in energy density by growing the variety of lively cells per unit space, by including a drain terminal on the highest floor, enabling wafer-level chip scale packaging (WLCSP).
The AW2K21 knowledge sheet provides these suggestions for utilizing the system in a circuit:
- It is suggested to attach a capacitor of 4.7 uF or extra as shut as doable to each enter and output of this product.
- It’s wanted to attach a TVS (Transient Voltage Suppressor) as a protecting ingredient towards surges that exceed absolutely the most rated voltage.
- This product would possibly trigger chip getting older and breakdown below the big electrified setting. Please contemplate designing an ESD safety circuit.
In comparison with standard options utilizing two 3.3 mm × 3.3 mm MOSFETs, the AW2K21 cuts the footprint by over 80% and ON-resistance by about 33%. It helps a number of use instances, together with USB VBUS safety, battery safety, and cargo switching, the place each compact measurement and dependable efficiency are important.
