MAX1908_09 datasheet(7/30 Pages) MAXIM

7 / 30 page

ELECTRICAL CHARACTERISTICS

(VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VREFIN = 3V, VVCTL = VICTL = 0.75 x VREFIN, CELLS = open, CLS =

REF, VBST - VLX = 4.5V, ACIN = GND = PGND = 0, CLDO = 1µF, LDO = DLOV, CREF = 1µF; CCI, CCS, and CCV are compensated

per Figure 1a; TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CHARGE-VOLTAGE REGULATION

VVCTL = VREFIN

-0.6

+0.6

VVCTL = VREFIN/20

-0.6

+0.6

Battery Regulation Voltage

Accuracy (2, 3, or 4 Cells)

VVCTL = VLDO

-0.6

+0.6

REFIN Range

(Note 1)

2.5

3.6

REFIN Undervoltage Lockout

VREFIN falling

1.92

CHARGE CURRENT REGULATION

CSIP-to-CSIN Full-Scale Current-

Sense Voltage

VICTL = VREFIN

70.5

79.5

VICTL = VREFIN

-6

VICTL = VREFIN x 0.6

-7.5

+7.5

VICTL = VLDO

-7.5

+7.5

MAX8765/MAX8765A only; VICTL = VREFIN x

0.036

-50

+50

Charging-Current Accuracy

MAX8724 only;

VICTL = VREFIN x 0.058

-33

+33

Charge-Current Gain Error

(MAX8765/MAX8765A Only)

-2

Charge-Current Offset

(MAX8765/MAX8765A Only)

-2

BATT/CSIP/CSIN Input Voltage

Range

VDCIN = 0V or VICTL = 0V or VSHDN = 0V

CSIP/CSIN Input Current

Charging

650

µA

Cycle-by-Cycle Maximum Current

Limit

IMAX

RS2 = 0.015

Ω

6.0

7.5

ICTL Power-Down Mode

Threshold Voltage

(MAX1908/MAX8724 Only)

VICTL rising

REFIN/

100

REFIN/

ICHG Transconductance

(MAX1908/MAX8724 Only)

GICHG

VCSIP - VCSIN = 45mV

2.7

3.3

µA/mV

ICHG Transconductance

(MAX8765/MAX8765A Only)

GICHG

VCSIP - VCSIN = 45mV

2.785

3.225

µA/mV

ICHG Transconductance Error

(MAX8765/MAX8765A Only)

-7.5

+7.5

ICHG Transconductance Offset

(MAX8765/MAX8765A Only)

-6.5

+6.5

µA

Low-Cost Multichemistry Battery Chargers

_______________________________________________________________________________________

MAX1908 Datasheet(PDF) 7 Page - Maxim Integrated Products

MAX1908 Datasheet(HTML) 7 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Datasheet Download

Link URL