CSP-12

(TOP VIEW)

A 1

A 2

A 3

B 1

B 2

C 1

C 2

C 3

D 1

D 2

D 3

B 3

A 1

A 2

A 3

B 1

B 2

B 3

C 1

C 2

C 3

D 1

D 2

D 3

CSP-12

(BOTTOMVIEW)

Not Recommended for New Designs

bq27505-J3

www.ti.com

SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010

2

DEVICE INFORMATION

2.1

AVAILABLE OPTIONS

PART NUMBER

FIRMWARE VERSION

COMMUNICATION FORMAT

TAPE & REEL QUANTITY

bq27505YZGR-J3

3000

2.20

CSP-12

–40°C to 85°C

bq27505YZGT-J3

250

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

2.2

DISSIPATION RATINGS

POWER RATING

DERATING FACTOR

PACKAGE

THERMAL

YZG

1.1 W

12 mW/°C

(1)

Measured with high-K board.

(2)

2.3

PIN ASSIGNMENT

Table 2-1. PIN FUNCTIONS

PIN

DESCRIPTION

NAME

NO.

Analog input pin connected to the internal coulomb counter where SRP is nearest the PACK– connection.

SRP

A1

IA

Connect to 5-m

Ω to 20-mΩ sense resistor.

Analog input pin connected to the internal coulomb counter where SRN is nearest the Vss connection.

SRN

B1

IA

Connect to 5-m

Ω to 20-mΩ sense resistor.

Battery Low output indicator. Active high by default, though polarity can be configured through the

BAT_LOW

C1

O

[BATL_POL] bit of Operation Configuration. Push-pull output.

Vss

D1

P

Device ground

Battery-good indicator. Active-low by default, though polarity can be configured through the [BATG_POL] bit

BAT_GD

A2

O

of Operation Configuration. Push-pull output.

SOC state interrupts output. Generate a pulse under the conditions specified by Table 5-5. Open drain

SOC_INT

B2

I/O

output.

BAT

C2

I

Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion accuracy.

Vcc

D2

P

Processor power input. Decouple with minimum 0.1mF ceramic capacitor.

SDA

A3

I/O

10k

Ω pull-up resistor (typical).

Ω

SCL

B3

I

pull-up resistor (typical).

Battery-insertion detection input. Power pin for pack thermistor network. Thermistor-multiplexer control pin.

BI/TOUT

C3

I/O

Use with pull-up resistor >1M

Ω (1.8 MΩ typical).

TS

D3

IA

Pack thermistor voltage sense (use 103AT-type thermistor). ADC input

(1)

I/O = Digital input/output, IA = Analog input, P = Power connection

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DEVICE INFORMATION

3

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