BQ500211A Datasheet, PDF (8/27 Pages) Texas Instruments – 5-V, WPC1.1 Compliant Wireless Power Transmitter Manager

bq500211A
SLUSBB1 – DECEMBER 2012
PIN
NO.
NAME
19 RESERVED
20 RESERVED
48 RESERVED
27 RESERVED
28 RESERVED
29 RESERVED
30 RESERVED
31 RESERVED
41 RESERVED
5 RESET
6 SLEEP
2 _{T_SENSE}
46 _{V_SENSE}
34 _V33A
33 _V33D
PIN FUNCTIONS (continued)
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I/O
DESCRIPTION
O Reserved, leave this pin open.
I Reserved, connect to GND.
I External Reference Voltage Input. Connect this input 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 10-kΩ pull-down resistor to GND.
O Reserved, leave this pin open.
I Device reset. Use a 10-kΩ to 100-kΩ pull-up resistor to the 3.3-V supply.
O Low-power mode output. Starts low-power ping cycle.
I
Sensor Input. Device shuts down when below 1 V. If not used, keep above 1 V by
connecting to the 3.3-V supply.
I Transmitter input voltage, used for efficiency calculations. Use 76.8-kΩ to 10-kΩ divider to
minimize quiescent current.
— Analog 3.3-V Supply. This pin can be derived from V33D supply, decouple with 10-Ω resistor
and additional bypass capacitors
— Digital core 3.3-V supply. Be sure to decouple with bypass capacitors as close to the part as
possible.
Typical Characteristics Curves
60
80
70
50
60
40
50
30
40
20
10
0
1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3
Input Voltage (V)
G000
Figure 1. bq500211A Supply Current vs. VCC Voltage
30
20
10
0
0
CSD17308Q2
CSD16301Q2
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output Current (A)
G000
Figure 2. System Efficiency Using Alternate MOSFETs
8
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