T-Temperatures- C

o

4.36

4.32

140

4.38

4.42

4.4

4.44

4.34

-60

-40

-20

0

20

40

60

80

100

120

V

,V

=5.5V

I =100 A

OUT

AC

I

+3Sigma

-3Sigma

Mean

bq24070, bq24071

SLUS694G – MARCH 2006 – REVISED DECEMBER 2014

www.ti.com

Electrical Characteristics (continued)

over junction temperature range (0°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SWITCHING POWER SOURCE TIMING

When input applied. Measure from:

Switching power source from input

[PG: Lo

50

μs

to battery

Temperature trip

155

Thermal hysteresis

30

°C

Temperature regulation limit

115

135

UVLO

Undervoltage lockout

2.45

2.50

2.65

V

Hysteresis

27

mV

Active only if IN or USB is present,

Output regulation voltage

3.3

V

–5%

5%

Output current

20

mA

On resistance

50

Ω

(14)

Output capacitance

1

μF

(12) Reaching thermal regulation reduces the charging current. Battery supplement current is not restricted by either thermal regulation or

shutdown. Input power FETs turn off during thermal shutdown. The battery FET is only protected by a short-circuit limit which typically

does not cause a thermal shutdown (input FETs turning off) by itself.

(13) In standby mode (CE low) the accuracy is ±10%.

7.6 Typical Characteristics

Figure 1. SIGMA Typical OUT Voltage Regulation, bq24070

8

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