MAX8601ETD 查看數據表（PDF） - Maxim Integrated

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MAX8601ETD

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

PIN

MAX8600 MAX8601

12, 13

12, 13

14

14

—

9

—

6

—

—

Pin Description (continued)

NAME

FUNCTION

DC

FLT

USB

USEL

EP

DC Input Supply. Connect DC to a 4.5V to 7V charging source. Bypass DC to GND with a 1µF

or larger capacitor. DC takes priority over USB when both are present (MAX8601). Both DC

inputs should be connected together externally.

Fault Status Output. FLT goes low when either the prequal timer or the fast-charge timers

expire and the battery voltage is not above the required threshold. Clear the fault by raising

EN or removing input power.

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

USB Charge-Select Input. Logic input that determines the maximum charge current drawn

from the USB input. IBAT = 95mA when USEL = low, and IBAT = 475mA when USEL = high.

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

THM OUT OF RANGE

POK = PREVIOUS STATE

CHG = PREVIOUS STATE

IBAT = 0A

PREQUAL TIMER HELD

THM OUT OF RANGE

POK = PREVIOUS STATE

CHG = PREVIOUS STATE

IBAT = 0A

FAST-CHARGE TIMER HELD

OFF

POK = HIGH, CHG = HIGH, FLT = HIGH

IBAT = 0A

VIN < 4.1V OR

VIN < 7.5V OR

VIN < VBAT OR

EN HIGH

ANY STATE

EN LOW AND

POWER-GOOD

SET TIMER = 0s

RTHM > 3.97kΩ AND

VBAT < 3V AND

RTHM < 28.7kΩ

PREQUAL

PREQUAL

TIMEOUT

FAULT

POK = LOW, CHG = HIGH

CHG = HIGH

IBAT = 150 / RSETI

FLT = LOW

RTHM < 3.97kΩ OR

RTHM > 28.7kΩ

VBAT < 2.82V

SET TIMER = 0s

VBAT > 3V

SET TIMER = 0s

IBAT > 112.5 / RSETI

RTHM > 3.97kΩ AND

AND FAST-CHARGE

RTHM < 28.7kΩ

FAST-CHARGE

TIMEOUT

POK = LOW, CHG = LOW

RTHM < 3.97kΩ OR

RTHM > 28.7kΩ

IBAT(DC) = 1500 / RISET

IBAT(USB) = 100mA / 500mA

IBAT < 172.5/RSETI

AND VOLTAGE MODE

IBAT < 112.5 / RSETI

AND VOLTAGE MODE

SET TIMER = 0s

SET TIMER = 0s

TOP-OFF

POK = LOW, CHG = HIGH

VBAT < 4.05V

SET TIMER = 0s

TOP-OFF

TIMEOUT

DONE

POK = LOW, CHG = HIGH

IBAT = 0A

Figure 1. Charger State Diagram

6 _______________________________________________________________________________________

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