5 Pin Configuration and Functions

1

P2

14

P3/SDA

2

VEN

13

P4/SCL

3

P1

12

P5/HDQ

4

BAT

11

P6/TS

5

CE

10

SRN

6

REGIN

9

SRP

7

REG25

8

VSS

Not to scale

Table 5-1. Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NUMBER

P2

1

O

LED 2 or Not Used (connect to VSS)

VEN

2

O

Active High Voltage Translation Enable. This signal is optionally used to switch the input voltage

divider on/off to reduce the power consumption (typ 45 µA) of the divider network. If not used,

then this pin can be left floating or tied to VSS.

P1

3

O

LED 1 or Not Used (connect to VSS). This pin is also used to drive an LED for single-LED mode.

Use a small signal N-FET (Q1) in series with the LED as shown on Figure 8-4.

BAT

4

I

Translated Battery Voltage Input

CE

5

I

Chip Enable. Internal LDO is disconnected from REGIN when driven low.

REGIN

6

P

Internal integrated LDO input. Decouple with a 0.1-µF ceramic capacitor to VSS.

REG25

7

P

2.5-V output voltage of the internal integrated LDO. Decouple with 1-µF ceramic capacitor to

VSS.

VSS

8

P

Device ground

SRP

9

I

Analog input pin connected to the internal coulomb-counter peripheral for integrating a small

voltage between SRP and SRN where SRP is nearest the BAT– connection.

SRN

10

I

Analog input pin connected to the internal coulomb-counter peripheral for integrating a small

voltage between SRP and SRN where SRN is nearest the PACK– connection.

P6/TS

11

I

Pack thermistor voltage sense (use a 103AT-type thermistor)

P5/HDQ

12

I/O

Open-drain HDQ Serial communication line (target). If not used, then this pin can be left floating

or tied to VSS.

P4/SCL

13

I

Target I2C serial communication clock input. Use with a 10-kΩ pullup resistor (typical). This pin is

also used for LED 4 in the four-LED mode. If not used, then this pin can be left floating or tied to

VSS.

P3/SDA

14

I/O

Open-drain target I2C serial communication data line. Use with a 10-kΩ pullup resistor (typical).

This pin is also used for LED 3 in the four-LED mode. If not used, then this pin can be left floating

or tied to VSS.

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BQ34Z100-R2

SLUSF37 – DECEMBER 2022

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