MAX1908 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX1908

Low-Cost Multichemistry Battery Chargers

Maxim Integrated 

MAX1908/MAX8724/MAX8765/MAX8765A

Low-Cost Multichemistry Battery Chargers

ABSOLUTE MAXIMUM RATINGS

DCIN, CSSP, CSSN, ACOK to GND.......................-0.3V to +30V

BST to GND ............................................................-0.3V to +36V

BST to LX..................................................................-0.3V to +6V

DHI to LX ...................................................-0.3V to (VBST + 0.3V)

LX to GND .................................................................-6V to +30V

BATT, CSIP, CSIN to GND .....................................-0.3V to +20V

CSIP to CSIN or CSSP to CSSN or

PGND to GND ....................................................-0.3V to +0.3V

CCI, CCS, CCV, DLO, ICHG,

IINP, ACIN, REF to GND.......................-0.3V to (VLDO + 0.3V)

DLOV, VCTL, ICTL, REFIN, CELLS, CLS,

LDO, SHDN to GND .............................................-0.3V to +6V

DLOV to LDO.........................................................-0.3V to +0.3V

DLO to PGND .........................................-0.3V to (VDLOV + 0.3V)

LDO Short-Circuit Current...................................................50mA

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN (5mm × 5mm)

(derate 20.8mW/°C above +70°C) .........................1666.7mW

Operating Temperature Range ..........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

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 = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

CHARGE-VOLTAGE REGULATION

Battery-Regulation Voltage

Accuracy

(MAX1908/MAX8724/MAX8765

(2, 3, or 4 Cells) and MAX8765A

(4 Cells Only))

VVCTL = VREFIN

VVCTL = VREFIN/20

VVCTL = VLDO

-0.5

+0.5

-0.5

+0.5

%

-0.5

+0.5

Battery-Regulation Voltage

Accuracy (MAX8765A, 2 or 3

Cells Only)

VCTL Default Threshold

REFIN Range

REFIN Undervoltage Lockout

CHARGE-CURRENT REGULATION

VVCTL = VREFIN

VVCTL = VREFIN/20

VVCTL = VLDO

VVCTL rising

(Note 1)

VREFIN falling

-0.4

+0.4

-0.4

+0.4

%

-0.4

+0.4

4.0

4.1

4.2

V

2.5

3.6

V

1.20 1.92

V

CSIP-to-CSIN Full-Scale Current-

Sense Voltage

VICTL = VREFIN

71.25 75 78.75 mV

Charging-Current Accuracy

VICTL = VREFIN

-5

VICTL = VREFIN x 0.6

-5

VICTL = VLDO

-6

MAX8765/MAX8765A only; VICTL = VREFIN x

0.036

-45

+5

+5

+6

%

+45

Charge-Current Gain Error

(MAX8765/MAX8765A Only)

Charge-Current Offset

(MAX8765/MAX8765A Only)

ICTL Default Threshold

BATT/CSIP/CSIN Input Voltage

Range

MAX8724 only; VICTL = VREFIN x 0.058

VICTL rising

-33

+33

-2

+2

%

-2

+2

mV

4.0

4.1

4.2

V

0

19

V

2

Maxim Integrated

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