MAX1772EEI datasheet(4/20 Pages) MAXIM

Part #	MAX1772EEI

Description	Low-Cost, Multichemistry Battery-Charger Building Block

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Manufacturer	MAXIM [Maxim Integrated Products]

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4 / 20 page

Low-Cost, Multichemistry Battery-

Charger Building Block

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VREFIN = 3.0V, VVCTL = VICTL = 0.75 VREFIN, VCELLS = 2.0V,

VACIN = 0V, CLS = REF, VBST - VLX = 4.5V, VGND = VPGND = 0V, CLDO = 1µF, LDO = DLOV, CREF = 1µF; pins CCI, CCS, and CCV

are compensated per Figure 1a; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VVCTL = VREFIN (2, 3, or 4 cells)

(see Equation 1)

-0.5

+0.5

Battery-Regulation Voltage

Accuracy

VVCTL = VREFIN/20 (2, 3, or 4 cells)

(see Equation 1)

-0.5

+0.5

%

REFIN Range

2.0

3.6

V

REFIN Undervoltage Lockout

1.20

1.92

V

ICHG Transconductance

VICHG to (VCSIP - VCSIN); VCSIP -

VCSIN = 0.185V; VICHG = 0V, 3.0V

0.95

1.00

1.05

µS

VCSIP - VCSIN = 0.185V

-5

+5

ICHG Accuracy

VCSIP - VCSIN = 0.05V

-10

+10

%

IINP Transconductance

VIINP to (VCSSP - VCSSN); VCSSP -

VCSSN = 0.185V; VIINP = 0V, 3.0V (Note 3)

0.85

1.00

1.15

µS

VCSSP - VCSSN = 0.185V

-15

+15

IINP Current Accuracy

VCSSP - VCSSN = 0.05V

(Note 3)

-20

+20

%

VCSSP - VCSSN = 0.08V, VCLS = 1.6V

-10

+10

CSSP - CSSN Accuracy

VCSSP - VCSSN = 0.2V, CLS = REF

-10

+10

%

CSSP + CSSN Input Voltage

Range

8.0

28

V

LOGIC LEVELS

CELLS Input Low Voltage

0.2

V

CELLS Input Middle Voltage

0.4

VLDO

- 0.5

V

CELLS Input High Voltage

VLDO

- 0.25

VLDO

V

CELLS Input Bias Current

VCELLS = 0V or VLDO

-10

+10

µA

ACOK Sink Current

VACOK = 0.4V

1

mA

ACOK Leakage Current

VACOK = 5.5V

-1

+1

µA

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