Texas Instruments BMS034, Руководство пользователя, Страница: 13 / 31

Figure 2-9. Multi-Bit Register Section
For GUI composer, go to OTG Configuration Section and change the following registers:
• OTG Reg Voltage to 12 V
• IOTG Limit to 1 A.
Figure 2-10. OTG Configuration Section
Next go to the Chip configuration and check the EN OTG Mode box and EN ACDRV1 box.
Figure 2-11. Chip Configuration
4. Take measurements as follows:
• Measure
➡
V
VBUS-PGND
(TP21 and TP45) = 12.0 V ±0.2 V
• Measure
➡
V
AC1-PGND
(TP22 and TP45) = 12.0 V ±0.2 V
• Click READ ALL REGISTERS
– Verify
➡
REG1Bb[6] reports VINDPM or OTG
– Verify
➡
REG1Cb[4:1] reports VBUS Status as Normal OTG
5. Turn on Load#2 output set to CR of 24 Ω.
6. Take measurements as follows:
• Measure
➡
V
AC1-PGND
(TP22 and TP45) = 12.0 V ±0.2 V
• Measure
➡
I
AC1-SENSE
(TP1 and TP2) = 500 mA ±0.10 A
7. Lower the Load#2 CR to 10 Ω.
8. Take measurements as follows to confirm OTG current function:
• Measure
➡
V
AC1-PGND
(TP22 and TP45) < 12.0 V ±0.2 V
• Measure
➡
I
AC1-SENSE
(TP1 and TP2) = 1000 mA ±0.10 A
• Click READ ALL REGISTERS and Verify
➡
REG1Bb[7] reports IINDPM
9. Hints for further OTG testing:
• Enabling OTG mode is a two-step process, first enable OTG and then turn on the appropriate AC drive
FETs.
www.ti.com Test Setup and Results
SLUUCB5E – JUNE 2020 – REVISED JULY 2022
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