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MSP430BQ1010IRTVT Datasheet(PDF) 15 Page - Texas Instruments

Part No. MSP430BQ1010IRTVT
Description  WIRELESS RECEIVER-SIDE COMMUNICATION AND POWER MONITORING IC
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

MSP430BQ1010IRTVT Datasheet(HTML) 15 Page - Texas Instruments

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MSP430BQ1010
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SLAS696 – DECEMBER 2010
COMM and BQ25046 Current Mode Controller
This block receives the control error, actual power, and end power transfer packets from the control error packet
and power packet generator block and from the EPT generator block. It performs the WPC-compliant bit, byte,
and packet encoding that is required to transmit the packet information over the COMM_DRIVE pin. This block
also controls the BQ25046 current modes via the BQ25046_EN1 and BQ25046_EN2 pins.
During the power-up routine, the BQ25046_EN1 and BQ25046_EN2 pins are set high and the BQ25046 is
turned off. In the main loop routine, the BQ25046 is turned on only when a large negative control error (that is,
the control error greater than -5% with BQ25046_EN1= BQ25046_EN2 =1) is detected for four consecutive
iterations or a small control error (that is, the control error is less than ±5%) is detected the first time. Depending
on the status of the user-configurable COMM_ILIM_DISABLE pin, the current limit of the BQ25046 is enabled or
disabled during communication. See the BQ25046 Current Limit During Communication section for more details
regarding the COMM_ILIM_DISABLE pin and enabling current limit on BQ25046 during communication.
BQ25046 Current Limit During Communication
This feature enables or disables the current limit on the BQ25046 during communication via the
COMM_ILIM_DISABLE pin.
With the COMM_ILIM_DISABLE pin externally pulled high (to DVCC), the current limit on the BQ25046 during
communication is disabled; that is, the MSP430BQ1010 does not change the BQ25046 current mode during
communication.
With COMM_ILIM_DISABLE pin externally pulled low (to VSS), the current limit on BQ25046 is enabled during
communication. Depending on if the BQ25046 output current, measured at ISET_SCALE, is greater than or less
than VISET-SCALE-COMM-ILIM-THRESHOLD, the 500-mA (BQ25046_EN1 = 0 and BQ25046_EN2 =1 ) or 100-mA
(BQ25046_EN1 = 0 and BQ25046_EN2 = 0) current limit modes of BQ25046 are selected, respectively. With the
COMM_ILIM_DISABLE pin pulled low, the current limit mode of the BQ25046 is selected only during
communication; once the communication is complete, the BQ25046 is configured in the ISET mode with
BQ25046_EN1 = 1 and BQ25046_EN2 =0.
This feature is enabled only when the BQ25046 is turned ON.
Copyright © 2010, Texas Instruments Incorporated
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