Rainbow-electronics MAX1874 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX1874

Dual-Input, USB/AC Adapter, 1-Cell

Li+ Charger with OVP and Thermal Regulation

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

USB

= V

DCLV

= V

USEL

= 5V, V

BATT

= 4.2V, V

THRM

= V

REF

/ 2, Circuit of Figure 2, T

= 0°C to +85°C, unless otherwise

noted. Typical values are at T

= +25°C.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

BATTERY CHARGING AND PRECHARGE CURRENT

DCI Voltage Range 0.1 x V

REF

DCI

= V

REF

950 1000 1050

DCI Voltage to BATT Current

DCI

= V

REF

/ 2 490 520 550

USEL = high 455 495

USB Charging Current

USEL = low 82 95

Soft-Start Current-Ramp Time Measured from 10% to 90% 7 ms

Prequal Charging Current V

BATT

= 2.5V 35 55 70 mA

BATT Input Current No DC or USB power, V

BATT

= 4.2V 5 7.5 µA

BATT Shutdown Current EN = GND, USB- and/or DC-powered 1 2 µA

THERMISTOR MONITOR AND DIE-TEMPERATURE REGULATION

THRM COLD Trip Level (Note 2) 0.72 0.74 0.76 V

REF

THRM HOT Trip Level (Note 2) 0.28 0.29 0.30 V

REF

THRM Disable Threshold 50 100 150 mV

Internal Die Thermal Limit +105 °C

LOGIC INPUT/OUTPUTS AND GATE DRIVERS

PON High Output Resistance

PON pulled up to active input (DCLV or USB),

DCLV

or V

USB

= 5V

25 Ω

PON Low Output Resistance PON resistance to GND, V

DCLV

= V

USB

= 0 120 kΩ

DCOK Low Output Resistance DCOK pulled low 25 Ω

DCOK Off-Leakage Current V

DCOK

= 12V, V

= 0V 1 µA

UOK Output Resistance UOK resistance to GND, V

= 0 25 Ω

UOK Off-Leakage Current V

UOK

= 6.5V 1 µA

DC input (% of charge current set at DCI) 8 12.5 19

U S B i np ut, U S E L = 5V ( % of U S B char g i ng cur r ent) 20 25 30

CHG Threshold to Indicate Battery Full,

Battery Current Falling (Note 3)

USB input with USEL = 0

Voltage

mode

CHG Logic-Low Output Sinking 10mA sink 0.4 V

CHG Leakage Current V

CHG

= 6.5V 1 µA

EN, USEL Logic-Input High Level 1.6 V

EN, USEL Logic-Input Low Level 0.4 V

EN, USEL Input Bias Current 1µA

1 2 3 4 5 6 7 8 ... 15 16

Kommentare zu diesen Handbüchern

Keine Kommentare

Rainbow-electronics MAX1874 Bedienungsanleitung Seite 3

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Sensoren Rainbow-electronics MAX1874