Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8662 and MAX8663
Edited by the Electronicstalk Editorial Team on 22 March 2007
Smart power devices select the right
source
Highly integrated power-management ICs include USB/AC-adapter linear charger and Smart Power Selector for portable devices powered by rechargeable single-cell Li-ion batteries.
New from Maxim Integrated Products, the MAX8662 and MAX8663 are highly integrated power-management ICs each with a USB/AC-adapter linear charger and Smart Power Selector for portable devices powered by rechargeable single-cell Li-ion batteries Integrating Smart Power Selector circuitry that seamlessly distributes power between an external input, the battery and system load, the MAX8662 and MAX8663 are ideal for smartphones, PDAs, portable media players and other portable devices for which energy efficiency is vital
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX8662 and MAX8663 use Maxim's proprietary Smart Power Selector circuitry to efficiently distribute power between a USB/AC-adapter source, the battery, and system load.
When external power is connected, the Smart Power Selector allows the system to operate with no battery or a deeply discharged battery.
It automatically switches the system load from the battery and makes the best use of limited USB or adapter power while charging the battery from input power not used by the system.
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The MAX8663 integrates two high-efficiency, step-down DC/DC convertors, four LDOs and a full-featured charger with Smart Power Selector.
The MAX8662 adds a step-up DC/DC convertor for up to seven WLEDs or OLED displays.
The two step-down DC/DC convertors offer up to 97% efficiency, provide a 1 to 3.3V adjustable output, and support 1.2A and 900mA loads.
The four LDOs support 500, 300 and two 150mA loads; to minimise power loss, they operate from a 1.7 to 5.5V input-voltage range.
Additionally, the LDOs have selectable output voltages to eliminate external resistor-dividers and minimise board space.
The charger's DC-input current limit is adjustable up to 2A and supports 500mA, 100mA and USB-suspend modes.
Charge current is adjustable up to 1.5A to accommodate a wide range of battery capacities.
Other charger features include thermal regulation, overvoltage protection, charge status and fault outputs, a power-OK monitor, a battery-thermistor monitor and a charge timer.
The MAX8662 is available in a thermally enhanced 6 x 6mm 48-pin TQFN package; the MAX8663 is available in a thermally enhanced 5 x 5mm 40-pin TQFN package.
These devices are specified for the extended temperature range (-40 to +85C).
Prices start at US $3.95 (1000-up).
Evaluation kits are available to speed designs.
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