Texas Instruments BQ24380DSGR, BQ24381DSGR, BQ24382DSGR Schematic [ru]

1

8

VDC

GND

1 Fm

IN

OUT

VBAT

bq24380

1 Fm

Charging

Circuit

6

SYSTEM

AC Adapter

2

VSS

bq24380
bq24381
bq24382

www.ti.com

......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009

Overvoltage and Overcurrent Protection IC and Li+ Charger Front-End Protection IC With

LDO Mode

1

FEATURES DESCRIPTION

2

• Input Overvoltage Protection

• Accurate Battery Overvoltage Protection

• Output Short-Circuit Protection

• Soft-Start to Prevent Inrush Currents

• Soft-Stop to Prevent Voltage Spikes regulator, maintaining a 5.5-V (bq24380) or 5-V

• 30-V Maximum Input Voltage

• Supports up to 1.7-A Load Current

• Thermal Shutdown

• Enable Function

• Fault Status Indication

• Small 2 mm × 2 mm 8-Pin SON Package

APPLICATIONS

• Smart Phones, Mobile Phones

• PDAs

• MP3 Players

• Low-Power Handheld Devices

The bq2438x family are charger front-end integrated
circuits designed to provide protection to Li-ion
batteries from failures of the charging circuitry. The IC
continuously monitors the input voltage and the
battery voltage. The device operates like a linear

(bq24381, bq24382) output with input voltages up to
the Input overvoltage threshold. During input
overvoltage conditions, the IC immediately turns off
the internal pass FET disconnecting the charging
circuitry from the damaging input source. Additionally,
if the battery voltage rises to unsafe levels while
charging, power is removed from the system. The IC
checks for short-circuit or overload conditions at its
output when turning the pass FET on, and if it finds
unsafe conditions, it switches off, and then rechecks
the conditions. Additionally, the IC also monitors its
die temperature and switches off if it exceeds 140 ° C.

When the IC is controlled by a processor, the IC
provides status information about fault conditions to
the host.

APPLICATION SCHEMATIC

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2 PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

Copyright © 2008 – 2009, Texas Instruments Incorporated

bq24380
bq24381
bq24382

SLUS805B – APRIL 2008 – REVISED MARCH 2009 .........................................................................................................................................................

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

DEVICE V

bq24380 6.3 V 5.5 V 2mm x 2mm SON CFE
bq24381 7.1 V 5 V 2mm x 2mm SON CFW
bq24382 10.5 V 5 V 2mm x 2mm SON OBE

(1) For the most current package and ordering information, see the Package Option Addendum at the end

of this document, or see the TI Web site at www.ti.com .

OVP

V

O(REG)

PACKAGE

(1)

MARKING

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ABSOLUTE MAXIMUM RATINGS

(1)

over operating free-air temperature range (unless otherwise noted)

VALUE UNIT

IN (with respect to VSS) – 0.3 to 30 V

V

I

I

max Output source current OUT 2 A

OUT

T

J

T

stg

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage
values are with respect to the network ground terminal unless otherwise noted.

Input voltage OUT (with respect to VSS) – 0.3 to 12 V

FAULT, CE, VBAT (with respect to VSS) – 0.3 to 7 V

Output sink current FAULT 15 mA
Junction temperature – 40 to 150 ° C
Storage temperature – 65 to 150 ° C

DISSIPATION RATINGS

PACKAGE R

DSG 5 ° C/W 75 ° C/W

θ JC

R

θ JA

RECOMMENDED OPERATING CONDITIONS

MIN MAX UNIT

V

I

I

O

T

J

IN voltage range 3.3 30 V
Current, OUT pin 1.7 A
Junction temperature -40 125 ° C

2 Submit Documentation Feedback Copyright © 2008 – 2009, Texas Instruments Incorporated

Product Folder Link(s): bq24380 bq24381 bq24382

bq24380
bq24381
bq24382

www.ti.com

ELECTRICAL CHARACTERISTICS

Over junction temperature range -40 ° C ≤ TJ≤ 125 ° C and recommended supply voltage (unless otherwise noted)

IN

UVLO CE = LO or HI, VIN: 0 V → 3 V 2.5 2.8 V
V

hys(UVLO)

t

DGL(PGOOD)

I

DD

I

STDBY

INPUT-TO-OUTPUT CHARACTERISTICS

V

DO

I

OFF

INPUT OVERVOLTAGE PROTECTION

V

O(REG)

V

OVP

V

hys(OVP)

t

PD(OVP)

t

REC(OVP)

OUTPUT SHORT-CIRCUIT PROTECTION (only at start-up)

I

O(SC)

t

REC(SC)

BATTERY OVERVOLTAGE PROTECTION

BV

OVP

V

hys(BVovp)

I

(VBAT)

t

DGL(BVovp)

THERMAL PROTECTION

T

J(OFF)

T

J(OFF-HYS)

LOGIC LEVELS ON CE

V

IL

V

IH

I

IL

I

IH

LOGIC LEVELS ON FAULT

V

OL

I

lkg

(1) Not tested. Specified by design

......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Undervoltage lock-out, input power
detected threshold

Hysteresis on UVLO CE = LO or HI, VIN: 3 V → 0 V 200 300 mV
Deglitch time, input power detected status 8 ms

Operating current bq24381 300 µ A

CE = LO or HI. Time measured from
VIN0 V → 5 V 1- µ s rise-time

CE = LO, no load on OUT pin,
VIN= 5 V

bq24380 250

bq24382 300

Standby current CE = HI, VIN= 5.5 V 100 µ A

Dropout voltage IN to OUT CE = LO, VIN= 5 V, I

= 1 A 280 mV

(OUT)

Q1 off-state leakage current CE = HI, VIN= 5.5 V 10 µ A

bq24380 5.3 5.5 5.7

Output voltage CE = LO, VIN= 6 V bq24381 4.8 5 5.2 V

bq24382 4.8 5 5.2
bq24380 6.1 6.3 6.5

Input overvoltage protection threshold CE = LO, VIN: 5 V → 8 V bq24831 6.88 7.1 7.31 V

bq24382 10.17 10.5 10.83

CE = LO or HI, VIN: 7 V → 5 V bq24380 25 110

Hysteresis on OVP bq24831 25 120 mV

(1)

Input OV propagation delay VIN: 5 V → 10 V 200 ns
Recovery time from input overvoltage condition 8 ms

Short-circuit detection threshold 3 V < VIN< V

CE = LO or HI, VIN: 8 V → 5 V

CE = LO. Time measured from
VIN: 7 V → 5 V, 1- µ s fall-time

- V

OVP

hys(OVP)

bq24382 150 300

1.3 1.5 1.7 A

Retry interval if short-circuit detected 64 ms

Battery overvoltage protection threshold VIN> 4.5 V, CE = LO 4.3 4.35 4.4 V
Hysteresis on BV

(OVP)

VIN> 4.5 V, CE = LO 200 320 mV

Input bias current on VBAT pin TJ= 25 ° C 10 nA

VIN> 4.5 V, CE = LO, Time measured from

Deglitch time, battery overvoltage detected V

rising from 4.1 V to 4.4 V to FAULT 176 µ s

VSAT

going low.

Thermal shutdown temperature 140 150 ° C
Thermal shutdown hysteresis 20 ° C

Logic LOW input voltage 0 0.4 V
Logic HIGH input voltage 1.4 V

VCE= 1.8 V 15 µ A

Output LOW voltage I
Off-state leakage current, HI-Z V

= 5 mA 0.2 V

SINK

= 5 V 10 µ A

FAULT

1 µ A

Copyright © 2008 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 3

Product Folder Link(s): bq24380 bq24381 bq24382

IN

VSS

NC

FAULT

OUT

NC

VBAT

CE

bq2438x

1

2

3

4

8

7

6

5

bq24380
bq24381
bq24382

SLUS805B – APRIL 2008 – REVISED MARCH 2009 .........................................................................................................................................................

DEVICE INFORMATION

TERMINAL FUNCTIONS

TERMINAL

NAME NO.

IN 1 I Input power, connected to external DC supply. Bypass IN to VSS with a ceramic capacitor (1 µ F minimum)
VSS 2 – Ground terminal. Connect to the thermal pad and to the ground rail of the circuit.
NC 3, 7 Do not connect to any external circuits. These pins may have internal connections used for test purposes.

FAULT 4 O off due to input overvoltage or output short-circuit conditions, an overtemperature condition, or because the

CE 5 I
VBAT 6 I Battery voltage sense input. Connected to pack positive terminal through a 100-k Ω resistor.

OUT 8 O Output terminal to the charging system. Bypass OUT to VSS with a ceramic capacitor (1 µ F minimum)

Thermal PAD potential as the VSS pin on the printed circuit board. Do not use the thermal pad as the primary ground input

I/O DESCRIPTION

Open-drain device status output. FAULT is pulled to VSS internally when the input pass FET has been turned
battery voltage is outside safe limits. FAULT is high impedance during normal operation.

Active-low chip enable input. Connect CE = HI to turn the input pass FET off. Connect CE = LOW to turn the
internal pass FET on and connect the input to the charging circuitry. CE is Internally pulled down, ~200 k Ω .

The thermal pad is electrically connected to VSS internally. The thermal pad must be connected to the same
for the device. VSS pin must be connected to ground at all times.

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4 Submit Documentation Feedback Copyright © 2008 – 2009, Texas Instruments Incorporated

Product Folder Link(s): bq24380 bq24381 bq24382

V
2V/div

FAULT

V
500mV/div

OUT

t-Time-2ms/div

V
5V/div

IN

V
2V/div

IN

V

2V/div

OUT

I
500mA/div

OUT

R =6.6

OUT

W

t-Time-2ms/div

V

2V/div

IN

V
2V/div

OUT

V
2V/div

FAULT

t-Time-200ms/div

V

2V/div

IN

V

2V/div

OUT

V

2V/div

FAULT

V =6Vto9Vstep

IN

t-Time-5 s/divm

V
5V/div

IN

V

2V/div

OUT

V =10Vto6Vstep

IN

V
2V/div

FAULT

t-Time-2ms/div

V
5V/div

IN

V

5V/div

OUT

I

1 A/div

OUT

V

2V/div

FAULT

t-Time-5ms/div

bq24380
bq24381
bq24382

www.ti.com

......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009

TYPICAL CHARACTERISTICS

NORMAL POWER-ON

SHOWING SOFT-START (bq24380) OVP at POWER-ON

Figure 1. Figure 2.

OVP RESPONSE for INPUT STEP (bq24380) SLOW INPUT RAMPINTO OVP EVENT (bq24380)

Figure 3. Figure 4.

RECOVERY FROM OVP (bq24380) POWER UP INTO SHORT CIRCUIT

Copyright © 2008 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 5

Figure 5. Figure 6.

Product Folder Link(s): bq24380 bq24381 bq24382

V
2V/div

OUT

V =3.8Vto4.5Vstep

BAT

V
2V/div

FAULT

t-Time-50 s/divm

V
1V/div

BAT

V
5V/div

IN

V
500mV/div

OUT

I
1 A/div

OUT

t-Time-20 s/divm

2.40

2.45

2.50

2.55

2.60

2.65

2.70

2.75

-40 -15 10 35 60 85 110 135

T -Free-AirTemperature-°C

A

UVLO-UndervoltageLockout-V

V Rising

IN

V Falling

IN

50

90

130

170

210

250

-40 -15 10 35 60 85 110 135

DROPOUTVOLTAGE-mV

T -Free-AirTemperature-°C

A

I =1 A

OUT

V =5V

IN

V =4V

IN

6.0

6.4

6.8

7.0

7.2

7.4

–40 –15 10 35 60 85 110 135

V – Threshold – V

OVP

T – Free-AirTemperature – °C

A

6.6

6.2

V Rising

IN

V Rising

IN

V Falling

IN

bq24380

bq24381

V Falling

IN

4.90

5.00

5.10

5.20

5.30

5.40

5.50

5.60

–40 –15

10 35 60 85

110 135

V – OutputVoltage

–

V

OUT(REG)

T – Free-AirTemperature – °C

A

bq24380

bq24381

bq24380
bq24381
bq24382

SLUS805B – APRIL 2008 – REVISED MARCH 2009 .........................................................................................................................................................

TYPICAL CHARACTERISTICS (continued)

SOFT-STOP DURING OCP EVENT (bq24380) BATTERY OVP EVENT (bq24380)

Figure 7. Figure 8.

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UVLO DROPOUT VOLTAGE

vs vs

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

Figure 9. Figure 10.

OUTPUT VOLTAGE REGULATION, V

vs vs

O(REG)

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

OVP THRESHOLD

6 Submit Documentation Feedback Copyright © 2008 – 2009, Texas Instruments Incorporated

Figure 11. Figure 12.

Product Folder Link(s): bq24380 bq24381 bq24382