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MAX8804Y Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX8804Y Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 15 page General Description The MAX8804Y/MAX8804Z intelligent, dual-input, stand-alone, constant-current, constant-voltage (CCCV), thermally regulated linear chargers are designed for a single-cell lithium-ion (Li+) battery. They integrate the current-sense circuit, MOS pass element, thermal-regulation circuitry, and overvoltage protection (OVP), and eliminate the reverse-blocking Schottky diode to create a simple and small charging solution for handheld equipment. The MAX8804Z functions as a stand-alone charger to control the charging sequence from the prequalification state through fast-charge, top-off charge, and full- charge indication. The MAX8804Y eliminates the pre- qualification state to allow startup into a load without a battery. Proprietary thermal-regulation circuitry limits the die temperature when fast-charging or while exposed to high ambient temperatures, allowing maxi- mum charging current without damaging the IC. The MAX8804Y/MAX8804Z achieve high flexibility by providing an adjustable DC/USB fast-charge current through a simple single-wire interface (SET input). The chargers automatically select between either a USB or AC adapter input source. The AC adapter charge cur- rent is programmable from 400mA to 700mA in 50mA steps through a serial interface. The USB charge cur- rent is programmable to 95mA, 380mA, or 475mA through the same interface. Other features include an active-low battery charging-status indicator (CHG), an active-low power-OK indicator (POK), and an active-low USB input detection output (USBPWR). The MAX8804Y/MAX8804Z accept a 4.15V to 30V DC source voltage or a 4.15V to 16V USB input voltage, but disable charging when either input voltage exceeds 7.5V to protect against unqualified or faulty input sources. The MAX8804Y/MAX8804Z operate over the extended temperature range (-40°C to +85°C) and are available in a tiny 8-pin thermally enhanced 2mm x 3mm TDFN package. Applications Cell Phones/Smartphones Digital Cameras Portable Media Players MP3 Players Other Handheld Devices Features ♦ Complete Chargers for Single-Cell Li+ Battery ♦ Dual-Input, 30V AC Adapter/16V USB ♦ No External FET, Blocking Diode, or Sense Resistor Required ♦ Automatic USB/AC Adapter Input Selection ♦ Easy Programmable Fast-Charge Current and Top-Off Threshold ♦ Proprietary Die Temperature Regulation Control ♦ ±5% Fast-Charge Current-Limit Accuracy ♦ Power-Present and Charger-Status Outputs ♦ No Prequalification Charge (MAX8804Y) ♦ Tiny 2mm x 3mm Thermally Enhanced TDFN Package ♦ USB Charging Protected by US Patent #6,507,172 High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN ________________________________________________________________ Maxim Integrated Products 1 19-0785; Rev 0; 4/07 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Ordering Information * EP = Exposed paddle. + Denotes a lead-free package. Note: All devices are specified to operate over the -40°C to +85°C operating temperature range. PART PIN- PACKAGE PKG CODE TOP MARK MAX8804YETA+ 8 TDFN-EP* T823+1 AAD MAX8804ZETA+ 8 TDFN-EP* T823+1 AAC Pin Configuration appears at end of data sheet. DC GND USB SET CHG POK USBPWR BAT +3.3V AC ADAPTER USB PORT ENABLE/DISABLE AND PROGRAMMING Li+ 1 μF 2.2 μF MAX8804Y MAX8804Z 1 μF Typical Application Circuit |
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