SOURCE: Intersil

October 24, 2005 06:00 ET

Intersil Introduces Industry's Highest Voltage Input (28V), Low-Current Single-Cell Li-Ion Charger IC for Bluetooth Headset Applications

MILPITAS, CA -- (MARKET WIRE) -- October 24, 2005 -- Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog solutions, today announced the ISL9204, growing its extensive portfolio of fully-integrated single-cell Li-ion (Lithium ion) battery chargers. The ISL9204's 28V input voltage rating eliminates the over-voltage protection circuit normally required in low-input chargers, reducing component count and overall system cost. The charger accepts input voltages up to 28V but is disabled when the input voltage exceeds the OVP (over-voltage protection) threshold minimum of 10V, enhancing system protection. This device is optimized for smaller cell capacities by setting the trickle charge threshold at 2.7V (recommended by small cell manufacturers) and offering charge current accuracy of 10 percent between 75mA and 150mA.

"Intersil's ISL9204 is optimized to address the charging requirements of low-capacity 1-cell Li-ion applications such as Bluetooth headsets and small portable multimedia players," said Andrew Baker, product marketing manager of Intersil's Handheld Power product group. "The ISL9204 offers reduced system cost with increased safety by using integrated over-voltage protection to prevent excessive power dissipation. The tiny 2x3 mm DFN (dual flat no-lead) package enables it to be used in space-constrained and thermally sensitive applications."

Integration and Efficiency: A Powerful Combination

The ISL9204 performs the constant current/constant voltage (CC/CV) charge function required by Li-ion batteries. The charge current and end-of-charge (EOC) current are programmable with external resistors. When the charge current reduces to the programmable EOC current level during the constant voltage (CV) charge phase, an EOC indication is provided by the charge (CHG) pin, which is an open-drain output. Two indication pins, power present (PPR) and CHG, allow simple interface to a microprocessor or LEDs. The Company has secured design wins and is shipping the ISL9204 in production volumes.

"The Bluetooth headset market has been under development for over five years," said Susie Inouye, research director and principal analyst of Databeans, Inc. "Only recently has the market really begun to take off, reaching levels that the analysts had earlier predicted, driven by improved form factors and lower prices. And now with most phones having Bluetooth built in, the number of headset shipments could reach well over 100 million units over the next few years."

Key Features

--  28V maximum for the voltage power input
--  Complete charger for single-cell Li-ion/polymer batteries
--  Integrated pass element and current sensor
--  No external blocking diode required
--  One percent voltage accuracy
--  Programmable EOC current
--  Charge current thermal foldback for thermal protection
Target Applications
--  Bluetooth headsets
--  MP3/Multimedia players
--  Stand-alone chargers
--  Mobile phones
--  Other handheld devices
About Intersil's Power Management Portfolio

Intersil is a recognized global leader in power management solutions, offering a broad portfolio of products that simplify a variety of power designs. Intersil has a full family of high-performance battery chargers for Li-ion/Li-polymer applications. These chargers feature innovative Thermaguard™ and AnyAdapter™ technology that significantly improves thermal performance while greatly simplifying system design. Integrating typical external components such as MOSFETs, reverse blocking diode and current sense functions into a highly compact, thermally-enhanced package minimizes total application size and lowers overall system cost. To learn more, visit Intersil's Power Management Web site at

Pricing and Availability

The ISL9204 is available now in an 8-lead DFN standard or lead-free package and is priced at $1.15 in 1,000-unit quantities. More information on the ISL9204 is available at,1477,ISL9204,0.html. A large selection of power products is supported by Intersil's iSim™ online design tool. To explore these solutions, visit To view a broad range of application block diagrams, visit Intersil's Application Design Center at

Note to editors: To view a high-resolution downloadable photo of the ISL9204, visit Intersil's photo room at:

About Intersil

Intersil Corporation, a NASDAQ 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company's products address three of the industry's fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, switching DC/ DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and rad-hard applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at

iSim, Thermaguard and AnyAdapter are trademarks of Intersil Corporation. All other brands or product names are trademarks or registered trademarks of their respective holders.

Contact Information

  • Media Contact
    Kim Fehrt
    Public Relations Manager
    Intersil Corporation
    (408) 546-3566
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