Hi,
I build an QR Flyback with an XMC1302 but I need reduce the power consumption as far as possible during startup.
The Aux Cap is charged by a current source (~15mA), but im not able to get lower then ~4mA.
What i woud like to do is:
1. Startup:
scale down clock to 100kHz <-> 1MHz
setup timer to generate an wakeup isr after 5 <-> 25 ms
go to deep sleep
2. Sleep Loop
start ADC, check Aux Voltage
Vaux > Setvalue ? Running : Sleep Loop
3. Running
scale up clock to 32MHz / 64MHz
Init peripheral
start Flyback (softstart)
Running mode is working just fine, control loop, light load / full load jumps, vally skipping, etc.
To check the power consumption i use this test code
Code:
int main(void){
uint32_t TimerId_SysTick_1s;
uint32_t TimerId_SysTick_10ms;
uint32_t timer_status;
DAVE_STATUS_t status;
//pre Init IO for Debugging
DIGITAL_IO_Init(&POWERLINE_MODUL_EN_pin);
DIGITAL_IO_SetOutputHigh(&POWERLINE_MODUL_EN_pin);
//init cpu Clock
CLOCK_XMC1_Init(&CLOCK_XMC1_0);
//gate every peripheral by API
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_VADC);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_CCU80);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_CCU40);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_USIC0);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_BCCU0);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_POSIF0);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_MATH);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_WDT);
XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_RTC);
//gate every peripheral by Reg
SCU_CLK->CGATSET0 = 0x07FFUL; // Gate Off all peripherals
WR_REG(SCU_CLK->CLKCR, SCU_CLK_CLKCR_CNTADJ_Msk, SCU_CLK_CLKCR_CNTADJ_Pos,(0x3FFU));
COMPARATOR->ANACMP0 |= COMPARATOR_ANACMP0_CMP_LPWR_Msk; // Put Comparator into low power mode
COMPARATOR->ANACMP0 &= ~(COMPARATOR_ANACMP0_CMP_EN_Msk); // Disable ACMP0
COMPARATOR->ANACMP1 &= ~(COMPARATOR_ANACMP1_CMP_EN_Msk); // Disable ACMP1
COMPARATOR->ANACMP2 &= ~(COMPARATOR_ANACMP2_CMP_EN_Msk); // Disable ACMP2
//reduce peripheral Clock
XMC_SCU_CLOCK_SetFastPeripheralClockSource(XMC_SCU_CLOCK_PCLKSRC_MCLK);
//scale down cpu clock
CLOCK_XMC1_SetMCLKFrequency(125);
SCU_CLK->PWRSVCR |= SCU_CLK_PWRSVCR_FPD_Msk; // make sure flash powers down during deep sleep
PPB->SCR |= PPB_SCR_SLEEPDEEP_Msk; // Setup for Deep Sleep instead of normal sleep
__disable_irq(); //disable all interrupts
//debugging
DIGITAL_IO_SetOutputLow(&POWERLINE_MODUL_EN_pin);
while(1){
if(sleep_en){
__WFI();
}
DIGITAL_IO_ToggleOutput(&POWERLINE_MODUL_EN_pin);
}
//======================================================================
//============= Running Mode
//======================================================================
status = DAVE_Init(); /* Initialization of DAVE APPs */
if(status != DAVE_STATUS_SUCCESS){
XMC_DEBUG("DAVE APPs initialization failed\n");
while(1U){}
}
NetzPLL_Init(); //init Mains PLL
NetzMonitor_Init(); //init Mains Monitor
Fly_Control(1); //init Flyback
Attachment 3545
How can i further reduce the current consumtion? Or where is my misstake?
Thanks a lot for your support!
Best Regards,
Sascha
