Datasheet

bq500211A
www.ti.com SLUSBB1A – DECEMBER 2012–REVISED SEPTEMBER 2013
PIN FUNCTIONS
PIN
I/O DESCRIPTION
NO. NAME
3 This pin can be either connected to GND or left open. Connecting to GND can improve
AIN3 I
layout grounding.
1 This pin can be either connected to GND or left open. Connecting to GND can improve
AIN5 I
layout grounding.
45 I This pin can be either connected to GND or left open. Connecting to GND can improve
AIN7
layout grounding.
35 BPCAP — Bypass capacitor for internal 1.8-V core regulator. Connect bypass capacitor to GND.
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.
37 COMM_A+ I Digital demodulation non-inverting input A, connect parallel to input B+.
38 COMM_A- I Digital demodulation inverting input A, connect parallel to input B-.
39 COMM_B+ I Digital demodulation non-inverting input B, connect parallel to input A+.
40 COMM_B- I Digital demodulation inverting input B, connect parallel to input A-.
22 DOUT_RX I Leave this pin open.
21 DOUT_TX I Leave this pin open.
15 DOUT_2B O Optional Logic Output 2B. Leave this pin open.
12 PWM Output A, controls one half of the full bridge in a phase-shifted full bridge. Switching
DPWM_A O
deadtimes must be externally generated.
13 PWM Output B, controls other half of the full bridge in a phase-shifted full bridge. Switching
DPWM_B O
deadtimes must be externally generated.
49 EPAD - Flood with copper GND plane and stitch vias to PCB internal GND plane.
17 FOD read pin. Leave open unless PMOD and FOD thresholds need to be different. It
FOD O
controls the FOD threshold resistor read at startup.
32 GND — GND.
36 GND — GND.
47 GND — GND.
42 I Transmitter input current, used for efficiency calculations. Use 20-mΩ sense resistor and
I_SENSE
A=50 gain current sense amplifier.
44 LED_MODE I Input to select from 4 LED modes.
4 Dynamic Power Limiting™ (DPL) control pin. To set power mode to 500 mA, pull to GND.
LoPWR I
For full-power operation pull to 3.3-V supply.
43 LOSS_THR I Input to program foreign and parasitic metal object detection threshold
18 Used for boot loading the MSP430 low power supervisor. If MSP430 is not used, leave this
MSP_CLK I/O
pin floating.
8 MSP – TMS, SPI-MISO, LED-B -- If external MSP430 is not used, connect to an LED via
MSP_MISO/LED_B I
470-Ω resistor for status indication.
7 MSP – Reset, LED-A -- If external MSP430 is not used, connect to an LED via 470-Ω
MSP_RST/LED_A I
resistor for status indication.
14 MSP_SYNC O MSP SPI_SYNC, if external MSP430 is not used, leave this pin open.
26 MSP_TDO/PROG I/O MSP-TDO, MSP430 programmed indication.
9 MSP_TEST I MSP – Test, If external MSP430 is not used, leave this pin open.
25 MSP_MOSI/LPWR_EN I/O Low standby power supervisor enable. If low power is not needed, connect this to GND.
16 PMOD read pin. Leave open unless PMOD and FOD thresholds need to be different. It
PMOD O
controls the PMOD threshold resistor read at startup.
10 PMB_CLK I/O 10-kΩ pull-up resistor to 3.3-V supply.
11 PMB_DATA I/O 10-kΩ pull-up resistor to 3.3-V supply.
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