|Alguien dijo ...|
|Lo opuesto de una formulación correcta es una formulación incorrecta. Pero lo opuesto de una verdad profunda puede ser muy bien otra verdad profunda,|
Niels Henrik David Bohr(1885-1962)
Físico danés, premio Nobel de Física 1922.
|New Input-Current-Limited Battery Charger with Integrated 3.3V LDO
Offers Most Complete and Cost-Effective Solution|
SUNNYVALE, CA- -Maxim Integrated
Products introduces the MAX8730, a highly integrated, accurate, and low-cost battery-charger IC. The MAX8730
charges three to four lithium-ion (Li+) cells in series at charge currents greater than 3.5A. Analog inputs control
input current limit, charge current, and voltage. An integrated 3.3V LDO supplies over 20mA current to any external
circuitry or ICs, such as a keyboard controller. Three monitoring outputs simplify design, and save external
component cost and board space. Two analog outputs are available for charge current and input current; a digital
output is used to detect AC-adapter presence.
The MAX8730 provides 0.5% accurate battery-voltage regulation,
which increases battery capacity and minimizes charging time. The device can be hardwired or controlled by a
microprocessor to set the charging current or voltage.
Based on the presence or absence of an AC
adapter, the MAX8730 uses two p-channel MOSFETs to automatically select the appropriate source for powering the
The MAX8730 features AC-adapter current limiting. The IC monitors the current drawn from
the adapter and adjusts the charge current so that supplying the system load and the charger simultaneously does not
overload the adapter. This important feature enables system operation with lower cost AC adapters.
The MAX8730 is packaged in a space-saving 28-pin QFN (5mm x 5mm), and is specified for the extended industrial
temperature range (-40°C to +85°C). The MAX8730 is also available in a lead-free package. Prices start at $5.04
(1000-up, FOB USA).
Lunes, 02 Enero, 2006 - 05:44