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PDF MAX8804W Data sheet ( Hoja de datos )
| Número de pieza | MAX8804W | |
| Descripción | USB/AC Adapter Chargers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-0785; Rev 1; 10/07
EVAALVUAAILTAIOBNLEKIT
High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
General Description
The MAX8804W/MAX8804Y/MAX8804Z intelligent,
dual-input, stand-alone, constant-current, constant-volt-
age (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.
www.DTahtaeShMeeAtX4U8.8c0o4mW/MAX8804Z function as stand-alone
chargers to control the charging sequence from the pre-
qualification state through fast-charge, top-off 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 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), an active-low
USB input detection output (USBPWR) on the
MAX8804Y/MAX8804Z, and battery pack detection
(DETBAT) on the MAX8804W.
The 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 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.
Applications
Cell Phones/Smartphones
Digital Cameras
Portable Media Players
MP3 Players
Other Handheld Devices
Pin Configuration appears at end of data sheet.
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 (MAX8804W)
♦ 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
Ordering Information
PART
PIN-
PACKAGE
PKG
CODE
TOP
MARK
MAX8804WETA+ 8 TDFN-EP*
T823+1
AAP
MAX8804YETA+ 8 TDFN-EP*
T823+1
AAD
MAX8804ZETA+ 8 TDFN-EP*
T823+1
AAC
*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.
Typical Application Circuit
+3.3V
AC
ADAPTER
1μF
USB
PORT
1μF
DC
CHG
MAX8804W
GND MAX8804Y POK
MAX8804Z
USB <USBPWR>
(DETBAT)
ENABLE/DISABLE
AND PROGRAMMING
SET
BAT
2.2μF
Li+
NOTE: () FOR MAX8804W, < > FOR MAX8804Y/MAX8804Z
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
1 page  
High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
Typical Operating Characteristics
(VBAT = 3.6V; DC charge mode: VDC = 5V, VUSB = 0V, VDETBAT = 0V (only for MAX8804W), VSET = 0V or unconnected; USB charge
mode: VUSB = 5V, VDC = 0V, VSET = 5V; TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. INPUT VOLTAGE
(DC CHARGING MODE)
1.0
SUPPLY CURRENT vs. INPUT VOLTAGE
(USB CHARGING MODE)
1.0
0.8 0.8
www.DataSheet4U.com 0.6
0.6
0.4 0.4
0.2 0.2
0
0 3 6 9 12 15 18 21 24 27 30
INPUT VOLTAGE (V)
DISABLED-MODE SUPPLY CURRENT
vs. INPUT VOLTAGE (DC CHARGING MODE)
0.8
0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)
STANDBY-MODE SUPPLY CURRENT
vs. INPUT VOLTAGE (USB CHARGING MODE)
0.8
0.6 0.6
0.4 0.4
0.2 0.2
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)
CHARGE CURRENT vs. BATTERY VOLTAGE
(DC CHARGING MODE)
600
CHARGE CURRENT vs. BATTERY VOLTAGE
(USB CHARGING MODE)
200
500 160
400
120
300
80
200
100 40
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
_______________________________________________________________________________________ 5
5 Page 
High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
DC
POK
www.DataSheet4U.com
123 4
SET
tHIGH
2ms
DELAY
tSOFTSTART
500mA
(450mA)
550mA
(550mA)
ICHG 0mA
24 25 26 27 28
> 2ms
700mA
(700mA)
500mA
(450mA)
0mA
TOP-OFF
CURRENT
THRESHOLD
80mA
NOTE: ( ) FOR MAX8804W
90mA
100mA
70mA
80mA
Figure 3. DC Charging Current and Top-Off Threshold Programming
80mA
100mA
90mA
70mA
80mA
USB Charge Mode
Drive SET high to enable USB charging mode when the
USB input is valid. Subsequent low pulses with 1µs to
1ms pulse width on SET program the fast charging cur-
rent from 95mA, 380mA, to 475mA and then repeat
new cycle as shown in Tables 4 and 5. Drive SET low or
leave it unconnected longer than 2ms to disable USB
charging-control circuitry.
Table 4. MAX8804Y/MAX8804Z USB
Charging Current Programming by Series
Pulses
PULSE NUMBER DEFAULT 1st 2nd 3rd
ICHG (mA)
95 380 475 95
Top-Off Current
Threshold (mA)
80 80 80 80
Table 5. MAX8804W USB Charging
Current Programming by Series Pulses
PULSE NUMBER DEFAULT 1st 2nd 3rd
ICHG (mA)
380 475 95 380
Top-Off Current
Threshold (mA)
80 80 80 80
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MAX8804W.PDF ] | |
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| MAX8804Z | (MAX8804Y/Z) USB/AC Adapter Chargers | Maxim Integrated Products |
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