High-Voltage, Dual-Input, USB/AC

Adapter Chargers in 2mm x 3mm TDFN

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7

Pin Description

PIN

MAX8804V/

MAX8804W

MAX8804Y/

MAX8804Z

NAME

FUNCTION

1

1

BAT

Battery Connection. The IC delivers charging current and monitors battery voltage

using BAT. Bypass BAT to GND with a 2.2µF or larger ceramic capacitor. BAT is high

impedance when the IC is disabled.

2

—

DETBAT

Battery Pack Detection Input. Drive DETBAT low or connect it to GND to allow SET to

control the charger. Leave DETBAT unconnected to disable any charge mode.

—2

USBPWR

USB Input Detection Output. USBPWR is internally pulled low if a valid voltage is

present at USB, otherwise it is high impedance. USBPWR circuitry is active regardless

of SET and charger on/off status.

33

POK

Power-OK Monitor. POK is an open-drain output that is internally pulled low when a

valid charging source is detected at either DC or USB. POK is high impedance when

44

DC

DC Input Supply. Connect DC to a 4.15V to 7V charging source. Bypass DC to GND

with a 1µF or larger ceramic capacitor. DC takes priority over USB when both are valid.

5

5

USB

USB Input Source. Connect USB to a USB port. Bypass USB to GND with a 1µF or

larger ceramic capacitor.

66

CHG

Charging-Status Output. CHG is internally pulled low when the battery is being

charged. CHG is high impedance when the charger is in top-off mode or disabled.

7

7

SET

Enable/Disable, Charging Current, and Top-Off Threshold Set Input. Drive SET low to

enable DC charge mode and drive high to enable USB charge mode. If both DC and

USB inputs are present, SET is used for the DC charge mode only and USB charge is

disabled. SET is also used for programming the charge current and top-off threshold.

See the DC/USB Mode and Charging Current Setting section for details.

8

8

GND

Ground

—

—

EP

Exposed Paddle. Connect to the GND plane for optimum thermal dissipation.