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Part Number: DRV110
Hi allWould you mind if we ask DRV110?<Question1>We would like to confirm Cin "Input capacitor between VIN and GND".The recomended value is 1.0uF upto 4.7uF. The customer would like to configure as follows;-Ihold : 100mA-IPeak : 500mA-Vs : 55V-> We will confirm each constant(RPEAK, RHOLD and RSENSE).They could not configure Ihold=100mA, actual value was 200mA.With increasing VS, Ihold value was increased, is it correct operation?And then, with out Cin, Ihold was 120mA. Does Ihold depends on Cin?What is Cin used for? For ripple rejection?Should Cin be between 1.0uF and 4.7uF?<Question2>We would like to know Equation2 and Equation3 correctly.What is 66.67khom calculated?We would like to calculate Vref, so could you share us formula for it?
Kind regards,Hirotaka Matsumoto
Hi allWe add follows;ROSC=0ohmRs=15khomC1=1uFCkeep=0.068uFRpeak=120kohmRhold=100kohmRsense=1ohmKind regards,Hirotaka Matsumoto
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In reply to Costin Cazana:
Costin sanThank you so much for your reply!We got what Cin is used for.However, we could not understand how we should calculate Rpeak value and Rhold value from Ipeak=500mA and Ihold=100mA.There are Equation2 and Equation3 on the data sheet.For example, we would like to configure Ipeak=500mA and Ihold=100mA, how should we caluculate for Rpeak and Rhold?There is no Vref value. So, in order to configure Ipeak=500mA and Ihold=100mA, are Rpeak=120kohm and Rhold=100kohm(customer's setting) suitable value? Kind regards,Hirotaka Matsumoto
In reply to Hirotaka Matsumoto:
Costin sanThank you so much for your prompt reply!OK, we got that customer's settings are correct.We have some questions that there is the difference between customer's measured Ihold current value and calculation Ihold current value.In spite of Rhold = 100khom, customer's measured Ihold current value was 200mA.So, if you have some advice, could you let us know?What does Ihold depends on? Only Rhold?Kind regards,Hirotaka Matsumoto
Costin sanThank you so much for your DRV110's support always!We would like to send you detail information, waveform of the coil inductor and hold pin's voltage using E2E private message..So, could you accept friend request?Kind regards,Hirotaka Matsumoto
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