Texas Instruments bq24720 EVM, Руководство пользователя, Страница: 14 / 34

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Test Summary
Change the B0 bit (CHGEND) of Control Register to 0. (Enable the charging). Click Write.
Measure
→
I
(bat)
= 1000 mA
±
200 mA
Type in 3000 (mA) in the Charge Current Register and click Write.
Measure
→
I
(bat)
= 3000 mA
±
200 mA
Make sure the B3 bit (IOUTBT) of the Control Register is 1. (charge current output). If not, change it to 1.
Click Write.
Measure
→
V(J4(IOUT)) = 600 mV
±
30 mV
Click Read All.
Observe
→
The B3 bit (NoIreg) of the Status Register turns green (charge current loop active). The
window should be like Figure 11 .
Figure 11. The Software Main Window
Observe
→
Make sure the phase node voltage and the inductor current waveforms look like Figure 12 .
14 bq24720/21 EVM (HPA104) for Multi-Cell Synchronous SLUU237 – January 2006
Switch-Mode Charger With System Power Selector and SMBus SBS-Like Interface