MAX8600 Просмотр технического описания (PDF) - Maxim Integrated

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MAX8600

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

MAX8600 MAX8601

1

1, 7

2

2

3

3

4

4

5

5

6, 7, 9

—

8

8

10

10

11

11

Pin Description

NAME

FUNCTION

BAT

SETI

THM

GND

CT

N.C.

EN

POK

CHG

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. 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

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

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.

Ground

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.

No Connection. Make no external circuit connection.

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

high to disable the charger.

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

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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