DRV8353RS-EVM: No-load drive MOSFET chip and MOSFET hot

ming tang

Part Number: DRV8353RS-EVM
Other Parts Discussed in Thread: DRV8353

When no load, output PWM waveform drives MOSFET, MOSFET and chip are hot。When I disable the chip or MCU does not output PWM waveform, the chip normally does not heat，The image is my DRV configuration。/resized-image/__size/320x240/__key/communityserver-discussions-components-files/121/pastedimage1663133667630v4.png /resized-image/__size/320x240/__key/communityserver-discussions-components-files/121/pastedimage1663133647859v3.png

3 年多前

+1 Susan Ren 3 年多前

TI__Prodigy 750 points

图片非常模糊，可以上传分辨率高些清晰点的图片呢？

此外，SPI寄存器是否发生了任何警告和故障？正在使用什么Idrive设置？

请提供 GHx、SHx 和 Vdrain 的波形，以便于我们更好地分析您的问题。

0 ming tang 3 年多前回复 Susan Ren

DRV8353_write_DCR(0X0, 0x0, 0x0, 0x0, PWM_MODE_6X, 0x0, 0x0, 0x1, 0x0, 0x1);
delay_us(100);
DRV8353_write_HSR(LOCK_OFF, IDRIVEP_HS_300MA, IDRIVEN_HS_1100MA);
delay_us(100);
DRV8353_write_LSR(1, TDRIVE_1000NS, IDRIVEP_LS_300MA, IDRIVEN_LS_1100MA);
delay_us(100);
DRV8353_write_CSACR(0x0, VREF_DIV_2, 0x0, CSA_GAIN_40, 0x0, 0x0, 0x0, 0x0, SEN_LVL_1_0);
delay_us(100);
DRV8353_write_OCPCR(TRETRY_8MS, DEADTIME_200NS, OCP_RETRY, OCP_DEG_8US, VDS_LVL_1_88);
delay_us(100);

void DRV8353_write_DCR(int OCP_ACT, int DIS_CPUV, int DIS_GDF, int OTW_REP, int PWM_MODE, int PWM_COM, int PWM_DIR, int COAST, int BRAKE, int CLR_FLT)
{
uint16_t val = (OCP_ACT<<10) | (DIS_CPUV<<9) | (DIS_GDF<<8) | (OTW_REP<<7) | (PWM_MODE<<5) | (PWM_COM<<4) | (PWM_DIR<<3) | (COAST<<2) | (BRAKE<<1) | CLR_FLT;
DRV8353_write_reg(DRV8353_DRIVER_CONTROL, val);
}

void DRV8353_write_HSR(int LOCK, int IDRIVEP_HS, int IDRIVEN_HS)
{
uint16_t val = (LOCK<<8) | (IDRIVEP_HS<<4) | IDRIVEN_HS;
DRV8353_write_reg(DRV8353_GATE_DRIVE_HS, val);
}

void DRV8353_write_LSR(int CBC, int TDRIVE, int IDRIVEP_LS, int IDRIVEN_LS)
{
uint16_t val = (CBC<<10) | (TDRIVE<<8) | (IDRIVEP_LS<<4) | IDRIVEN_LS;
DRV8353_write_reg(DRV8353_GATE_DRIVE_LS, val);
}

void DRV8353_write_OCPCR(int TRETRY, int DEAD_TIME, int OCP_MODE, int OCP_DEG, int VDS_LVL)
{
uint16_t val = (TRETRY<<10) | (DEAD_TIME<<8) | (OCP_MODE<<6) | (OCP_DEG<<4) | VDS_LVL;
DRV8353_write_reg(DRV8353_OCP_CONTROL, val);
}

void DRV8353_write_CSACR(int CSA_FET, int VREF_DIV, int LS_REF, int CSA_GAIN, int DIS_SEN, int CSA_CAL_A, int CSA_CAL_B, int CSA_CAL_C, int SEN_LVL)
{
uint16_t val = (CSA_FET<<10) | (VREF_DIV<<9) | (LS_REF<<8) | (CSA_GAIN<<6) | (DIS_SEN<<5) | (CSA_CAL_A<<4) | (CSA_CAL_B<<3) | (CSA_CAL_C<<2) | SEN_LVL;
DRV8353_write_reg(DRV8353_CSA_CONTROL, val);
}

这是图片上的内容，关于DRV8353寄存器的配置