MAX8600(2005) データシートの表示（PDF） - Maxim Integrated

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MAX8600
(Rev.:2005)

Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer

Maxim Integrated 

Single-/Dual-Input 1-Cell Li+ Chargers with

OVP Protection and Programmable Charge Timer

Typical Operating Characteristics (continued)

(VDC = 5V, RSETI = 2kΩ, VBAT = 3.6V, MAX8601 evaluation kit with thermal resistance of 50°C/W. TA = +25°C, unless otherwise noted.)

CHARGE CURRENT vs. AMBIENT

TEMPERATURE (1A CHARGE)

1100

1000

VBAT = 4V

900

800

700

VBAT = 3.6V

600

500

400

300

200

100

-40 -15

RSETI = 1.5kΩ

10

35

60

85

TA (°C)

FAST-CHARGE TIME vs. CCT

800

700

600

500

400

300

200

100

0

0.010

0.045

0.080

CCT (µF)

0.115

0.150

Pin Description

PIN

MAX8600 MAX8601

1

1, 7

NAME

FUNCTION

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

BAT Bypass BAT to GND with a 2.2µF or larger ceramic capacitor. Connect both BAT inputs

together externally (MAX8601). BAT is high impedance when the IC is disabled.

DC Charge-Current Programming Input. Connect a resistor from SETI to GND to set the

2

2

SETI maximum charging current when using the DC input, the prequal current from either input, and

the CHG turn-off threshold.

Thermistor Input. Connect a 10kΩ NTC thermistor, in close proximity to the battery, from THM

3

3

THM to ground to monitor the battery temperature. Connect THM to GND to disable the thermistor

functionality. The IC suspends charging when RTHM is outside the hot and cold limits.

4

4

GND Ground

5

5

CT Timing Capacitor Input. Connect a capacitor from CT to GND to set the precharge timeout,

top-off time, and fast-charge timeout. Connect CT to GND to disable the timers.

6, 7, 9

—

N.C. No Connection. Make no external circuit connection.

8

8

EN

Active-Low Enable Input. Drive low or connect EN to GND to enable the charger. Drive EN high

to disable the charger.

10

10

POK

Power-OK Monitor. POK is an open-drain output that pulls low when a valid charging source is

detected at either DC or USB (MAX8601). POK is high impedance when EN is high.

Charging-Status Output. CHG goes low when the battery is above 3V and being charged with

11

11

CHG a current greater than 7.5% of the current programmed with RSETI. CHG is high impedance

when the charger is in prequal, top-off, or disabled.

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