BQ76952: bq76952

zdy ?

Part Number: BQ76952

你好！

在手册上我看到，负值是按二进制补码的方式写入，也就是我OCD3写-1000，我需要写入的二进制补码为0xFC18。同时我的电流报告单位为10mA，但是当我的放电电流大于10A的时候，OCD3并没有故障，请问一下，是我的写入方式不对，还是其它原因，谢谢。

1 年多前

0 Star Xu 1 年多前

TI__Guru*** 130456 points

您好，正在询问更了解这款芯片的TI工程师，稍后回复。

0 zdy ? 1 年多前回复 Star Xu

Prodigy 100 points

你好！

还有一个问题，目前我在做SCD的时候，使用的方式为bms外部短路，当我SCD DELAY设置为100us以上的时候，外部进行短路，但是它并不会报告SCD故障，相反当我SCD DELAY设置为小于100us的时候，进行外部短路，此时它会报告SCD故障，请问一下这是什么原因导致的，谢谢。

0 Star Xu 1 年多前回复 zdy ?

TI__Guru*** 130456 points

您好，

Was the device placed into CONFIG_UPDATE mode before writing and then returned to NORMAL mode after?

If not, please follow the steps detailed in Section 7.6: CONFIG_UPDATE Mode of the TRM to place the device into the state where you can then make changes to the data memory settings by following the steps detailed in Section 13.1: Data Memory Access.

0 zdy ? 1 年多前回复 Star Xu

Prodigy 100 points

谢谢你的回答，我确定已经进入了CONFIG_UPDATE Mode，因为我的OCD1和OCD2与OCD3是同时进行配置的，OCD1,OCD2 表现正常，并且确认已经退出了CONFIG_UPDATE Mode 。

0 Star Xu 1 年多前回复 zdy ?

TI__Guru*** 130456 points

您好，已经在E2E英文论坛发帖，请继续关注下面帖子。

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1287518/bq76952-bq76952-ocd3-not-trigger

0 Star Xu 1 年多前回复 Star Xu

TI__Guru*** 130456 points

您好, 是否放便将gg文件发过来看一下.

With regards to the SCD delay, it may be that the SCD current does not exceed the threshold for the whole delay time, hence why reducing the delay allows the fault to trigger. You may try observing the voltage between the SRP and SRN pins on a scope and providing a waveform capture for me to check along with the config file.

0 zdy ? 1 年多前回复 Star Xu

Prodigy 100 points

全屏 text.txt 下载

	ConfigData1.Power_ConfigL = Power_Cfg;	//0x0054
	ConfigData1.Power_ConfigH = Power_Cfg >> 8;
	ConfigData1.Comm_Type = COMM_TYPE;	//not use			
	ConfigData1.REG12_Config = REG12_CFG;	//0xDD		   
	ConfigData1.REG0_Config = REG0_CFG;		//0x01					
	ConfigData1.HWD_REG_OPTION = HWDREGOPTION;	//0x00	
	ConfigData3.En_ProtA = EN_PRTA;	//use all
	ConfigData3.En_ProtB = EN_PRTB;	//use all
	ConfigData3.En_ProtC = EN_PRTC;	//use all
	ConfigData3.Prot_CfgL = PRT_CFG;	//0x0000
	ConfigData3.Prot_CfgH = PRT_CFG >> 8;
	
	ConfigData2.Vcell_ModeL = gBq72Connect[0];	//0xFFFF		
	ConfigData2.Vcell_ModeH = gBq72Connect[0] >> 8;
	ConfigData2.DA_Cfg = DA_CFG;      		//0x0A				
	ConfigData2.CFETOFF_Pin_cfg = CFETOFF_cfg;	//0x02	
	ConfigData2.DFETOFF_Pin_cfg = DFETOFF_cfg;			
	ConfigData2.TS1_cfg =TS1_CFG; 		//0x07					
	ConfigData2.TS2_cfg =TS2_CFG;		//0x00						//TS2  use shutD   		
	ConfigData2.TS3_cfg =TS3_CFG;		//0x00					
	ConfigData2.HDQ_Pin_Cfg = HDQ_CFG;		//0x00				
	ConfigData2.DCHG_pin_Cfg = DCHG_CFG;	//0x00
	ConfigData2.DDHG_pin_Cfg = DDSG_CFG;	//0x00
	
	ConfigData4.CHGFET_ProtA = EN_CHGFET_PRTA;	//0x98			
	ConfigData4.CHGFET_ProtB = EN_CHGFET_PRTB;	//0xD5
	ConfigData4.CHGFET_ProtC = EN_CHGFET_PRTC;	//0x54
	
	ConfigData5.DSGFET_ProtA = EN_DSGFET_PRTA;	//0xE4
	ConfigData5.DSGFET_ProtB = EN_DSGFET_PRTB;	//0xE6
	ConfigData5.DSGFET_ProtC = EN_DSGFET_PRTC;	//0xE0
	
	ConfigData7.Body_Diode_ThreshL = gBodyDiodePrt;		//0x64
	ConfigData7.Body_Diode_ThreshH = gBodyDiodePrt >> 8;		
	
	BufSC = ((u16)gCurSCPrt * gCurSenseRes / 10);																	
	ConfigData7.SCD_Thresh = GetSubscriptU16(BufSC, SCDThreshTable, 16);	   //0x02			
	ConfigData7.SCD_Delay = (gDlySCPrt / 15) + 1;		//0x190									
	ConfigData8.SCD_Rec_Time = gTimeRecSCDHardPrt;	//0x02							

	BufSC = (((u16)gCurHardDOCPrt1 >> 1) * gCurSenseRes / 10);		
	ConfigData7.OCD1_Thresh = BufSC;				//0x02
	ConfigData7.OCD1_Delay = ((u16)gDlyHardDOCPrt1*10 - 66) / 33;	//0x12C						//unit 3.3ms  excursion 6.6
	
	BufSC = ((gCurHardDOCPrt2 >> 1) * gCurSenseRes / 10);		
	ConfigData7.OCD2_Thresh = BufSC; 				//0x04
	ConfigData7.OCD2_Delay = (((u16)gDlycurHardDOCPrt2 * 10) - 66) / 33;	//0x12C
	
	ConfigData7.OCD3_ThreshL =  (gCurHardDOCPrt3 / 10);		//-10000     uint 10mA					//-1000			// userA 10mA
	ConfigData7.OCD3_ThreshH =  (gCurHardDOCPrt3 / 10) >> 8;
	ConfigData7.OCD3_Delay = gDlycurHardDOCPrt3;			//0x02