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Overview

Description

Support is limited to customers who have already adopted these products.

The ISL6293 is a fully integrated low-cost single-cell Li-ion or Li-polymer battery charger. The charger accepts two power inputs, normally one from a USB (Universal Serial Bus) port and another one from a desktop cradle. The ISL6293 is an ideal charger for smart handheld devices that need to communicate with a personal computer via USB. The ISL6293 features 28V and 7V maximum voltages for the cradle and the USB inputs respectively. The 28V rating allows low-cost adapters be safely used. When both inputs are powered, the cradle input is used to charge the battery. The charge current is independently programmable for both inputs with two small resistors. One additional USBP pin allows the selection of high-power or low-power port for the USB input. The charger is self-protected against over temperature. If the die temperature rises above 100°C, a thermal foldback function reduces the charge current automatically to prevent further temperature rise. The charger preconditions the battery with low current when the battery voltage is below 2. 6V. The charger has two indication pins. The PPR (power present) pin outputs an open-drain logic LOW when either the cradle or the USB input power is attached. The CHG (charge) pin is also an open-drain output that indicates a logic LOW when the charge current is above a minimum current level. When the charge current is below the minimum current, the charger remains in operation but the CHG pin indicates a logic HIGH signal. For simplicity, the charger does not have re-charge or timer functions.

Features

  • Complete Charger for Single-Cell Li-ion/Polymer Batteries
  • Accept Two Power Sources
  • Low Component Count
  • Integrated Pass Element
  • Integrated Charge-Current Sensor with 10% Accuracy
  • No External Blocking Diode Required
  • Charge Current Thermal Foldback for Thermal Protection
  • 28V Maximum Voltage for the Cradle Input
  • Charge Indication
  • Adapter Presence Indication
  • Less than 1µA Leakage Current off the Battery when No Input Power Attached
  • Ambient Temperature Range: -40°C to 85°C
  • Thermally-Enhanced 3x3 DFN Package
  • Pb-free Available

Comparison

Applications

  • Smart Handheld Devices
  • Cell Phones, PDAs, MP3 Players
  • Digital Still Cameras
  • Handheld Test Equipment

Documentation

Type Title Date
Datasheet PDF 469 KB
Other PDF 1.17 MB
Other PDF 293 KB
End Of Life Notice PDF 200 KB
Product Change Notice PDF 248 KB
Application Note PDF 509 KB
Application Note PDF 397 KB
Manual - Development Tools PDF 212 KB
8 items

Design & Development

Models

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Diagram of ECAD Models