Hi, today I found a strange case on both our PCBA and EVM. When I enable the charger with a large charge current (such as 1.024A), the charge current will oscillate as below picture. Is this a certain feature or a defect?
Pic: The current waveform
I thought this was due to the low input current limit, however, I tried to adjust both hardware and software setting to the maximum on EVM and this also happened.
The following is the register settings for the charger:
| Addr | Data | Comment (All Values in Hex) |
| 0 | 7F | #Input Current Limit, HIZ and ILIM pin |
| 1 | 1 | #OTG Temperature thresholds, and Input Voltage DPM Offset |
| 2 | 1D | #ADC controls, OTG Frequency, ICO, DCP, and Input Detection |
| 3 | 1A | #Battery Load, WDT Reset periods, OTG and Charge Enable, and MINSYS setting |
| 4 | 10 | #Fast Charge Current Limit settings and MTK Pump enable |
| 5 | 11 | #Pre-charge and Termination Current Limit settings |
| 6 | 5E | #Charge Voltage Regulation Limit, Battery Low Voltage and Recharge threshold |
| 7 | 8D | #Termination Current Enable, STAT pin, WDT, Safety Timer, and JEITA Charge Current |
| 8 | 4F | #IR Compensation and Thermal Regulation thresholds |
| 9 | 44 | #ICO, Extended Safety Timer, BATFET control, MTK Pump Voltage, and JEITA Charge Voltage |
| 0A | 74 | #OTG Regulation Voltage and Current Limit settings |
| 0B | A7 | #Charger VBUS, Charging Mode, PG, USB Input, and System Voltage Regulation status |
| 0C | 85 | #WDT, OTG/VBUS OVP, Thermal Shutdown, Safety Timer, and TS pin faults |
| 0D | 48 | #Input Voltage DPM settings |
| 0E | 0 | #Thermal Regulation Charge Status, and ADC Battery Voltage conversion |
| 0F | 0 | #ADC System Voltage conversion |
| 10 | 0 | #ADC TS pin voltage as percentage of REGN conversion |
| 11 | D4 | #VBUS status, and ADC VBUS Voltage conversion |
| 12 | 0 | #ADC Charge Current conversion |
| 13 | 8 | #DPM status, and Input Current Limit setting |
| 14 | 15 | #Registers reset, Input Current Optimizer status, Device ID, and Temperature Profile |
Could you please help to reproduce this issue and analyze it?
