Rainbow Electronics MAX8804Z - Manual

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
MAX8804Y/MAX8804Z
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