Charge Pumps

Overcurrent &

Short Circuit

Protection

N-CH FET

Drive

Impedance

Track™ Gas

Gauging

Pack –

SMBus

Pack +

LDO

& Therm. Drive

& Reset

Therm

Fuse

Temperature

Measurement

& Protection

32kHz Clock

Generator

System

Interface

Voltage Level

Translator

Watchdog &

Protection

Timing

System

Interface

SHA-1

Authentication

Charging

Algorithm

SBS v1.1

Data

Cell & Pack

Voltage

Measurement

Overrcurrent

Protection

Overvoltage &

Undervoltage

Protection

Cell Balancing

Algorithm &

Control

Fail Safe

Protection

bq29330

Validation &

Control

bq20z40–R1

bq29330

bq294xy

Supply Voltage

32KHz

I

2C

Registers

Alert

RSNS

5m – 20m

typ.

Reset

1

XALERT

2

TS2

3

TS1

4

CLKOUT

5

6

PFIN

7

SAFE

8

SMBD

9

NC

10

SMBC

VCELL -

20

VCELL +

19

VCC

18

VSS

17

MRST

16

SRN

15

SRP

14

VSS

13

SCLK

12

SDATA

11

PRES

bq20z40-R1

www.ti.com

SLUS993A

– DECEMBER 2009 – REVISED MARCH 2011

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

SYSTEM PARTITIONING DIAGRAM

Figure 1. System Partitioning

TSSOP (PW) PIN FUNCTIONS

TSSOP (PW)

(TOP VIEW)

TSSOP (PW) PIN CONFIGURATIONS

PIN

I/O(1)

DESCRIPTION

NO.

NAME

1

XALERT

I

Input from bq29330 XALERT output

2

TS2

I

2nd Thermistor voltage input connection to monitor temperature

3

TS1

I

1st Thermistor voltage input connection to monitor temperature

4

CLKOUT

O

32.768-kHz output for the bq29330. This pin should be directly connected to the AFE.

(1)

I = Input, IA = Analog input, I/O = Input/output, I/OD = Input/Open-drain output, O = Output, OA = Analog output, P = Power

Copyright

© 2009–2011, Texas Instruments Incorporated

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Product Folder Link(s) :bq20z40-R1

Not Recommended for New Designs