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MAX8804V, MAX8804W, MAX8804Y, MAX8804Z

High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN

Industry's Smallest Dual Input Li+ Chargers Withstand 30V DC with Thermal Regulation, Allowing for Safest and Fastest Charging

Product Details

Key Features

Parametric specs for Battery Chargers
Charging VIN (V) (max) 7
Max. ICHG (A) 0.7
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 28
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.68
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 7
Max. ICHG (A) 0.7
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 28
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.68

Key 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
  • Battery Pack Detection Input (MAX8804V/MAX8804W)
  • Power-Present and Charger-Status Outputs
  • No Prequalification Charge (MAX8804Y)
  • Tiny 2mm x 3mm Thermally Enhanced TDFN Package
  • USB Charging

Applications/Uses

  • Cell Phones/Smartphones
  • Digital Cameras
  • MP3 Players
  • Other Handheld Devices
  • Portable Media Players

Description

The MAX8804V/MAX8804W/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.

The MAX8804V/MAX8804W/MAX8804Z function as stand-alone chargers to control the charging sequence from the prequalification state through fast-charge, topoff charge, and full-charge indication. The MAX8804Y eliminates the prequalification 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 maximum charging current without damaging the IC.

The MAX8804V/MAX8804W/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 current is programmable from 400mA to 700mA in 50mA steps through a serial interface. The USB charge current is programmable to 95mA, 380mA, or 475mA through the same interface. Other features include an active-low battery charging-status indicator (active-low CHG), an active-low power-OK indicator (active-low POK), an active-low USB input detection output (active-low USBPWR) on the MAX8804Y/MAX8804Z, and battery pack detection (DETBAT) on the MAX8804V/MAX8804W.

The MAX8804V has 120mA, 140mA, 180mA, and 200mA active-low CHG top-off threshold settings, while the MAX8804W/MAX8804Y/MAX8804Z have 70mA, 80mA, 90mA, and 100mA. The MAX8804V/MAX8804W/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 MAX8804V/MAX8804W/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.

Simplified Block Diagram

MAX8804, MAX8804V, MAX8804W, MAX8804Y, MAX8804Z: Typical Application Circuit MAX8804, MAX8804V, MAX8804W, MAX8804Y, MAX8804Z: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .