The ISL9220 minimizes charge time while providing maximum power efficiency and heat reduction using synchronous pulse width modulation technology with integrated MOSFETs. The device’s 1.2MHz switching frequency allows the use of small external inductors and capacitors. The device provides up to 2A charge current and charge voltage accuracy is 0.5 percent. Programmable input current limiting is included along with programmable pre-charge and fast charge settings.
Integrated overvoltage protection on the adapter/USB power input protects both the battery and circuitry from damage due to excessive voltage on the input. A programmable safety timer is provided to terminate charging if the battery fails to charge in the programmed period. The ISL9220 can also monitor the battery temperature and discontinue charging if the temperature becomes unsafe.
Pricing and Availability
The ISL9220 for 1-cell and ISL9220A for 2-cell batteries are both available now in compact 4mm x 4mm 20-lead TQFN packages. Pricing starts at $2.30 each in 1,000-piece quantities.
For more information please visit: www.intersil.com/power/.