Texas Instruments bq51020EVM, Руководство пользователя

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Test Procedure
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• A DC ammeter is connected between UUT and load
• Set the load for 5 Ω /1000 mA
Jumper Settings
• JP1
→
ILIM and FIX are shorted
• JP2 → CM_ILM and High are shorted
• JP3 → EN1 and Low are shorted
• JP4 → EN2 and Low are shorted
Voltage and Current Meters
• Connect the ammeter to measure 19-V input current to the transmitter. Connect the voltmeter to
monitor the input voltage at J1 and J2 of TX unit. On UUT a voltmeter is used to measure output
voltage at J3 with ground at J4. Connect the ammeter to measure load current.
RFOD: R6 Set Up
• Connect the ohmmeter between JP5 (FOD) and J4 (GND). Adjust R6 to a 495 Ω reading on the
ohmmeter.
• NOTE: Sometimes the multimeter cannot read the more than 430 Ω from the FOD resistor due to
charged up capacitors in the board. If that happens, use a twizer and short C15 for few seconds, then
measure again.
6.4 Procedure
The following operating procedures are provided at a variety of operating loads:
Turn ON Operation and Operation at 1000-mA Load
• Turn ON transmitter power supply (19 V)
• Transmitter – Verify LED D2 is ON
• UUT – Adjust load current to 1000 mA ±50 mA
• Put the receiver EVM on the transmitter coil and align them correctly
• After 5 seconds verify that:
– Transmitter – Status LED D5 should be green, flashing approximately every 1 second
– The transmitter should beep
– Transmitter – LED D2 still ON
– Receiver – LED D1 is ON
– UUT – Verify that V
OUT
is 4.9 V to 5.15 V (between J3 and J4)
– UUT – Verify that the rectified voltage is 5 V to 5.4 V (between TP3 and GND) NOTE : a modulation
signal is present on this voltage every 250 ms and may cause fluctuation in the reading: use lower
value or baseline.
Efficiency Test (1000-mA Load)
• Verify that input current to the TX is less than 500 mA with input voltage at 19 VDC
• Turn OFF the transmitter power supply (19 V)
Turn ON Operation and Operation at 500-mA Load
• Turn ON the transmitter power supply (19 V)
• Transmitter – Verify LED D2 is ON
• UUT – Adjust load current to 500 mA ±50 mA
• Put the receiver EVM on the transmitter coil and align them correctly
• After 5 seconds verify that:
– Transmitter – Status LED D5 should be green, flashing approximately every 1 second.
– The transmitter should beep
– Transmitter – LED D2 still ON
8 bq51020EVM (5-W WPC) Integrated Wireless Receiver Power Supply SLUUB03 – April 2014
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