STBC21 datasheet(10/54 Pages) STMICROELECTRONICS

No de pièce	STBC21

Description	LI battery charger with thermal regulation

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

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Electrical characteristics

STBC21

10/54

Doc ID 023256 Rev 1

4

Electrical characteristics

TJ = -25 °C to 85 °C unless otherwise specified. Refer to the typical application circuit.

Typical values are referred to TJ = 25 °C.

Table 6.

Electrical characteristics (DC)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VCC

2.6

9.0

V

VCC_USB

Minimum VCC to enable charging

without quasi-pulse

4.5

V

VBAT

3.0

4.25

V

ICC

Supply current

(excluding LEDs and

battery current)

Fast charge (1)

3.0 V<VCC<9.0 V

IBAT=100 mA

750

µA

Shutdown

2.6 V<VCC<2.85 V

80

µA

Standby

(charge terminated) 2.8

V<VCC<9.0 V

450

µA

ISTBY

IBAT standby current

(charge terminated)

0 V<VCC<9.0 V

VBAT=4.2 V

VTEMP=1.2 V

-50

µA

IPRE_CH

Nominal pre-charge / 0V-charge

current

2.8 V<VCC<9.0 V

48

60

72

mA

72

90

108

96

120

144

IF_CH

Nominal fast-charge current

Set by Ext. resistor

R1=1.25 kΩ

744

800

856

mA

ITERM

Charge termination current

10 mA steps

from 40 mA to 190 mA

4.5 V<VCC<9.0 V

VBAT=4.2 V, TIMER3=0

32

40

48

mA

…

152

190

228

IBAT_OCP

IBAT overcurrent protection

1.35

A

IVREF

VREF current limit

5.0 V<VCC<9.0 V

30

mA

IPHC

Photo-coupler current

VCC=5.0 V, VBAT=3.0 V

10

mA

ILk_PHC

Photo-coupler leakage

VCC=5.0 V, VBAT=4.8 V,

VPHC=5.0 V

2µA

ISINK

Sunk current during battery detection COUT=10 µF

1

mA

IDETECT

Sunk current during battery detection COUT=10 µF

1

mA

ILED

LED current

VREF=2.9 V, VFLED=2 V

RLED=90 kΩ

10

mA

VCC_POR

Power-on reset threshold

2.47

2.6

2.73

V

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