BQ500412 Datasheet, PDF (7/28 Pages) Texas Instruments – Low System Cost, Wireless Power Controller for WPC TX A6

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PIN
NO.
NAME
1 COIL_PEAK
2 _{T_SENSE}
3 SNOOZE_CAP
4 PWR_UP
5 RESET
6 PMOD
7 LED_A
8 LED_B
9 SLEEP
10 CLK
11 DATA
12 _{PWM_A}
13 FOD
14 RESERVED
15 COIL_1
16 COIL_2
17 COIL_3
18 SNOOZE
19 RESERVED
20 RESERVED
21 SNOOZE_CHG
22 FOD_CAL
23 BUZ_AC
24 _{BUZ_DC}
25 LED_C
26 RESERVED
27 RESERVED
28 RESERVED
29 RESERVED
30 RESERVED
31 GND
bq500412
PIN FUNCTIONS
SLUSBO2A – NOVEMBER 2013 – REVISED DECEMBER 2013
I/O
DESCRIPTION
I Connected to peak detect circuit. Protects from coil overvoltage event.
I
Sensor Input. Device shuts down when below 1 V for longer than 150ms. If not used, keep
above 1 V by connecting to the 3.3-V supply.
I Connected to interval timing capacitor
I First power-up indicator
I Device reset. Use a 10-kΩ to 100-kΩ pull-up resistor to the 3.3-V supply.
O Select for PMOD threshold
I Connect to an LED via 470-Ω resistor for status indication. Typically GREEN
I Connect to an LED via 470-Ω resistor for status indication. Typically RED
O Force SLEEP (5 sec low power)
I/O 10-kΩ pull-up resistor to 3.3-V supply. Please contact field for GUI application assitance.
I/O 10-kΩ pull-up resistor to 3.3-V supply. Please contact field for GUI application assitance.
O
PWM Output A, controls one half of the full bridge in a phase-shifted full bridge. Switching
deadtimes must be externally generated.
O Select for FOD threshold
O Reserved. Leave open.
O Select first coil
O Select second coil
O Select third coil
O Force SNOOZE (500ms low power)
O Reserved, leave this pin open.
I Reserved, connect to GND.
O Charge the snooze cap
O Select for FOD calibration resistor
O AC Buzzer Output. Outputs a 400-ms, 4-kHz AC pulse when charging begins.
O
DC Buzzer Output. Outputs a 400-ms DC pulse when charging begins. This could also be
connected to an LED via 470-Ω resistor.
I/O Connect to an LED via 470-Ω resistor for status indication. Typically YELLOW
I/O Reserved, connect to GND.
I/O Reserved, leave this pin open.
I/O Reserved, leave this pin open.
I/O Reserved, leave this pin open.
I/O Reserved, leave this pin open.
I/O Reserved, connect to GND.
Copyright © 2013, Texas Instruments Incorporated
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