ZHCSP75A July 2022 – December 2022 TPS1HC30-Q1
PRODUCTION DATA
|
Component |
Description |
Purpose |
|---|---|---|
TVS | SMBJ36CA (optional) | Filter voltage transients coming from battery (ISO7637-2) |
CVBB | 220 nF (optional) | Better EMI performance |
CIC | 100 nF | Minimal amount of capacitance on input for EMI mitigation |
CBULK | 2–10 μF (optional) | There to hold the rail for the LDO; however, helps to filter voltage transients on supply rail. Not a requirement but can be useful for ISO7637-2 transients. |
RPROT | 5 k | Protection resistor for microcontroller and device I/O pins |
RILIM | 7 k–70 k | Set current limit threshold |
RSNS | 1 k | Translate the sense current into sense voltage. |
CFILTER | 100 nF | Coupled with RPROT on the SNS line creates a low pass filter to filter out noise going into the ADC of the MCU |
CVOUT | 22 nF | Improves EMI performance, filtering of voltage transients |
RGND | 1 k? | Stabilize GND potential during turn-off of inductive load |
DGND | BAS21 Diode | Keeps GND close to system ground during normal operation |