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Search for the manufacturer’s application note (e.g., “PS42419HA EVM User Guide”). If unavailable, reference the datasheet’s “Typical Application Circuit.”
: This PSU uses a 6nd-generation design with specific primary and secondary sections common to HP's proprietary SFF builds. Installation & Compatibility ps42419ha schematic work
Search for (use exact quotes for better results): Search for the manufacturer’s application note (e
"Turned a scattered parts list into a multi-month battery-powered logger using a PS42419HA — three capacitors, one IC, and smarter sequencing. Tiny chip, huge uptime." Tiny chip, huge uptime
| Pin No. | Name | Type | Description | |---------|-------------|--------------|--------------------------------------------------| | 1 | VIN | Power Input | Main supply voltage (bypass to GND with 10µF) | | 2 | EN | Input | Enable pin (active high, tie to VIN if unused) | | 3 | SW | Output | Switching node (connect to inductor and diode) | | 4 | GND | Ground | Power and signal ground return | | 5 | FB | Input | Feedback voltage sense (resistor divider to VOUT)| | 6 | COMP | Analog I/O | Compensation pin (RC network to GND) | | 7 | VCC | Output | Internal LDO output (bypass with 1µF) | | 8 | PG (Power Good) | Open-drain output | For sequencing and fault indication |