bq500412

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SLUSBO2A – NOVEMBER 2013 – REVISED DECEMBER 2013

PIN FUNCTIONS

PIN

I/O

DESCRIPTION

NO.

NAME

1

COIL_PEAK

I

Connected to peak detect circuit. Protects from coil overvoltage event.

2

Sensor Input. Device shuts down when below 1 V for longer than 150ms. If not used, keep

T_SENSE

I

above 1 V by connecting to the 3.3-V supply.

3

SNOOZE_CAP

I

Connected to interval timing capacitor

4

PWR_UP

I

First power-up indicator

5

RESET

I

Device reset. Use a 10-k

Ω to 100-kΩ pull-up resistor to the 3.3-V supply.

6

PMOD

O

Select for PMOD threshold

7

LED_A

I

Connect to an LED via 470-

Ω resistor for status indication. Typically GREEN

8

LED_B

I

Connect to an LED via 470-

Ω resistor for status indication. Typically RED

9

SLEEP

O

Force SLEEP (5 sec low power)

10

CLK

I/O

10-k

Ω pull-up resistor to 3.3-V supply. Please contact field for GUI application assitance.

11

DATA

I/O

10-k

Ω pull-up resistor to 3.3-V supply. Please contact field for GUI application assitance.

12

PWM Output A, controls one half of the full bridge in a phase-shifted full bridge. Switching

PWM_A

O

deadtimes must be externally generated.

13

FOD

O

Select for FOD threshold

14

RESERVED

O

Reserved. Leave open.

15

COIL_1

O

Select first coil

16

COIL_2

O

Select second coil

17

COIL_3

O

Select third coil

18

SNOOZE

O

Force SNOOZE (500ms low power)

19

RESERVED

O

Reserved, leave this pin open.

20

RESERVED

I

Reserved, connect to GND.

21

SNOOZE_CHG

O

Charge the snooze cap

22

FOD_CAL

O

Select for FOD calibration resistor

23

BUZ_AC

O

AC Buzzer Output. Outputs a 400-ms, 4-kHz AC pulse when charging begins.

24

DC Buzzer Output. Outputs a 400-ms DC pulse when charging begins. This could also be

BUZ_DC

O

connected to an LED via 470-

Ω resistor.

25

LED_C

I/O

Connect to an LED via 470-

Ω resistor for status indication. Typically YELLOW

26

RESERVED

I/O

Reserved, connect to GND.

27

RESERVED

I/O

Reserved, leave this pin open.

28

RESERVED

I/O

Reserved, leave this pin open.

29

RESERVED

I/O

Reserved, leave this pin open.

30

RESERVED

I/O

Reserved, leave this pin open.

31

GND

I/O

Reserved, connect to GND.

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