SMB139

Summit Microelectronics, Inc

2121 3.0 6/19/2008

6

DC OPERATING CHARACTERISTICS (CONTINUED)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Logic Inputs/Output

Input Low Level

600

mV

Input High Level

1.4

V

SDA/STAT Output Low Level

300

mV

Enable/CHGSET Input bias

current

1

µA

STAT sink current

5

mA

Battery Charger

Trickle-charge to pre-charge

voltage threshold

2.0

V

Nominal trickle-charge

current

3

mA

Pre-charge to fast-charge

voltage threshold

100mV steps

2.400

3.100

V

Nominal pre-charge current

16 steps

23

90

mA

Pre-charge current tolerance

T=0

25

45

65

mA

Nominal Fast charge current

16 steps

33

212

mA

Fast charge current tolerance

185

212

237

mA

Float voltage range

20mV steps

4.020

4.400

V

Float voltage tolerance

T=+10

-1

+1

%

Dropout voltage

55

mV

Charge termination current

16 steps

10

89

mA

Termination current tolerance

4

10

16

mA

Recharge threshold voltage

125

mV

Thermistor current

3 settings

10

100

µA

Thermistor current tolerance

+70

90

100

110

µA

Charge cutoff temp (high)

Adjustable, conditions per

typical application

30

65

Charge cutoff temp (low)

Adjustable, conditions per

typical application

-20

15

Note 1: Voltage and current accuracies are only guaranteed for factory-programmed settings. Changing the output voltage from that reflected in the

customer specific CSIR code will result in inaccuracies exceeding those specified above.

Note 2: The SMB139 device is not intended to function as a battery pack protector. Battery packs used in conjunction with this device need to provide

adequate internal protection and to comply with the corresponding battery pack specifications.