Narrow VDC Regulator/Charger with SMBus Interface Evaluation Board


The ISL9520EVAL1Z board evaluates the ISL9520 highly integrated Narrow VDC regulator/battery charger controller for Li-ion/Li-ion polymer batteries. It has an SMBus interface and provides gate drive to external switching N-channel FETs that control system voltage, charge current limit, and input current limit. The ISL9520EVAL1Z evaluation board includes a USB to SMBus interface to allow users to control the ISL9520 from a personal computer.

Key Features

  • ±0.5% system voltage accuracy (-10°C to +100°C)
  • ±3% accurate input current limit (-10°C to +100°C)
  • ±3% accurate battery charge current limit
  • Variable switching frequency at light load conditions for higher efficiency
  • Fixed frequency operation at higher loads, Fixed frequency mode can be forced by an external pin
  • Trickle charge system for deeply discharged batteries
  • SMBus 2-wire serial interface
  • Default system voltage values for 2-cell, 3-cell or
  • 4-cell operation selected by an external pin
  • Adapter in-rush FET control
  • Adapter isolation FET control
  • Battery short circuit protection
  • Fast system-load transient response
  • Monitor outputs
  • 11-bit max system voltage setting
  • 7-bit min system voltage setting
  • 6-bit charge current setting: Over 8A battery charger current
  • 6-bit adapter current setting: Over 8A adapter current
  • +9V to +22V adapter voltage range
  • VOUT from 2.5V to 19V in 16mV increments
  • High efficiency at loads < 0.5W for Energy Star 2013 and ErP lot 6, 250mW from adapter with 170mW to the load
  • Turbo mode support


  • Ultrabooks
  • Notebook computers
  • Tablet PCs
  • Portable equipment with rechargeable batteries

ISL9520EVAL1Z Narrow VDC Regulator/Charger Eval Board

ISL9520EVAL1Z Narrow VDC Regulator/Charger Eval Board


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