LP8727

SNVS898A – OCTOBER 2012 – REVISED MAY 2013

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Charger Electrical Characteristics

temperature range (

−40°C to +125°C).

(1) (2) (3)

Symbol

Parameter

Conditions

Typ

Min

Max

Units

Over Voltage Protection

Charger input is turned off if voltage is

6.9

6.7

7.2

V

Threshold

above this threshold

Over Voltage Protection

170

120

220

mV

Threshold Hysteresis

VBUS Operating Range

4.45

6

V

250

VBUS OK Trip Point

mV

40

−0.35

+0.35

Termination Voltage

%

−1

+1

Charger pass transistor ON

250

400

m

Ω

resistance

4.45V

VBUS Programmable Full-

90

1100

mA

Rate Charging Current

(4)

Full-rate charging current

−5

+5

%

tolerance

Pre-charge current

80

60

100

mA

80 mA option selected

Maximum Input Current

2.3

A

Full-rate Qualification

2.6

2.5

2.7

V

Threshold

charge to Full-rate Charging

End-of-charge Current, %

0.1C option selected

10

%

of Full-rate Current

Regulated Junction

115

°C

Temperature

VBUS Detection Threshold

3.5

3

4

V

Power OK Debounce Time

30

Debounce Time from Pre-

ms

Pre-charge to full-rate charging

Charge to Full-rate

55

transition

Transition

Debounce Time from CV to

400

ms

End-of-Charge Transition

Charge Safety Timer

Pre-charge Mode

45

minutes

(1)

Junction-to-ambient thermal resistance is highly application and board layout dependent. In applications where high power dissipation

exists, special care must be given to thermal dissipation issues in board design.

(2)

Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100 mV below its

nominal value.

(3)

performance over the input voltage range and closed loop condition, refer to the datasheet curves.

(4)

(5)

Min and Max limits are specified by design, test or statistical analysis. Typical numbers are not ensured, but do represent the most likely

norm.

8

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