Datasheet

bq500410A
SLUSB96 – NOVEMBER 2012 www.ti.com
Table 1. bq500410A Pin Description (continued)
PIN
I/O DESCRIPTION
NO. NAME
32 GND — GND
33 V33D — Digital Core 3.3-V supply. Be sure to decouple with bypass capacitors as close to the part as
possible.
34 V33A — Analog 3.3-V supply. This pin can be derived from V33D supply, decouple with 22-Ω resistor
and additional bypass capacitors
35 BPCAP — Bypass capacitor for internal 1.8-V core regulator. Connect bypass capacitor to GND
36 GND — GND
37 COMM_A+ I Digital demodulation noninverting 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 noninverting input B, connect parallel to input A+
40 COMM_B- I Digital demodulation inverting input B, connect parallel to input A-
41 RESERVED I Reserved, leave this pin open
42 I_SENSE I Transmitter input current, used for parasitic loss calculations. Use 20-mΩ sense resistor and
A=50 gain current sense amp
43 LOSS_THR I Input to program foreign metal object detection (FOD) threshold
44 LED_MODE I LED Mode Select
45 V_SENSE I Transmitter power train input voltage, used for FOD and Loss calculations. Voltage sample
point should be after current input sense resistor. Use 76.8-kΩ to 10-kΩ divider to minimize
quiescent loss.
46 V_IN I System input voltage selector. Connect this input to GND for 12-V operation.
47 GND — GND
48 ADCREF I External reference voltage input. Connect this input to GND.
49 EPAD — Flood with copper GND plane and stitch vias to PCB internal GND plane
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