MAX8934BETI+ datasheet(6/31 Pages) MAXIM

Part #	MAX8934BETI+

Description	Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring

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Manufacturer	MAXIM [Maxim Integrated Products]

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6 / 31 page

Dual-Input Linear Chargers, Smart Power Selector

with Advanced Battery Temperature Monitoring

6 ______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDC = VPEN1 = VPEN2 = 5V, CEN = USUS = THMEN = GND, VBATT = 4V, VTHM = 1.65V, USB, THMSW, CHG, DONE, OT, DOK,

UOK, FLT are unconnected, CCT = 0.068FF, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum Prequal Time

From CEN falling to end of prequal charge, VBATT = 2.5V

30

min

Maximum Fast-Charge Time

From CEN falling to FLT falling

300

min

Maximum Top-Off Time

MAX8934A/MAX8934C/MAX8934E

15

s

MAX8934B/MAX8934D

60

min

Timer Accuracy

-20

+20

%

Timer Extend Threshold

Percentage of fast-charge current below where the timer

clock operates at half-speed

50

%

Timer Suspend Threshold

Percentage of fast-charge current below where timer

clock pauses

20

%

THERMISTOR MONITOR (Beta = 3477) (Note 2)

THM Cold No-Charge Threshold

(T1)

ICHG = 0A, when charging is suspended, 2NC hysteresis

-2.2

0

+2.4

N

C

73.9

74.4

75.1

% of

THMSW

THM Cold Threshold (T2)

ICHG reduced (safety region 1 only), VBATT_REG

reduced (safety region 2 only), 2NC hysteresis

8

10

12

N

C

64.5

65

65.5

% of

THMSW

THM Hot Threshold (T3)

VBATT_REG reduced (safety region 1), 2.5NC hysteresis

42.8

45

47.5

N

C

32.1

32.4

32.8

% of

THMSW

THM Hot No-Charge Threshold

(T4)

ICHG = 0mA, when charging is suspended, 3NC

hysteresis

57

60

63.5

N

C

22.4

22.7

23

% of

THMSW

THM Hot Overtemperature

Threshold (TOT)

OT asserts low, 5NC hysteresis

71

75

80

N

C

15.5

15.8

16

% of

THMSW

THERMISTOR MONITOR (Beta = 3964) (Note 3)

THM Cold No-Charge Threshold

(T1)

ICHG = 0A, when charging is suspended, 2NC hysteresis

-2.1

0

+2.4

N

C

76.4

77.2

77.9

% of

THMSW

THM Cold Threshold (T2)

ICHG reduced (safety region 1 only), VBATT_REG

reduced (safety region 2), 2NC hysteresis

8.2

10

12

N

C

66.2

67

67.6

% of

THMSW

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