Ps42419ha Schematic - Top

The PS-4241-9HA Go to product viewer dialog for this item. is a 240W power supply unit (PSU) primarily found in HP desktop systems like the Compaq 6000 and 8000 Pro series. Known for its high efficiency, it is an 80 PLUS certified component designed for small form factor (SFF) workstations. 🛠️ Repair & Reliability Review

The HP/Compaq PS-4241-9HA is a 240W 80 PLUS certified power supply used in SFF desktops like the Elite 8000/8200 and Pro 6000/6200 series, featuring 90.51% peak efficiency ps42419ha schematic top

Input Stage: Features transient filtering and an active Power Factor Correction (PFC) circuit to handle 100-240V AC inputs while maintaining a power factor close to unity (0.99 at full load). The PS-4241-9HA Go to product viewer dialog for this item

3.5 Protection Features

• Output Overvoltage Protection (OVP): Often implemented via an auxiliary winding voltage monitor (a diode + zener to VCC or FB pin). If VCC exceeds ~25V, the IC latches off.
• Overcurrent Protection (OCP): CS pin voltage triggers IC shutdown at >~0.8V.
• Over-temperature Protection (OTP): External NTC thermistor on primary side, connected to a dedicated OTP pin (if available) or used to pull FB low.
• Brown-In/Out: Undervoltage lockout (UVLO) on VCC (typically turn-on at 16V, turn-off at 8V).

This power supply is known for its high efficiency and specialized "proprietary" connector layout, which differs from standard consumer ATX power supplies. Form Factor: Proprietary SFF (Small Form Factor). Maximum Power: 240 Watts. This power supply is known for its high

Secondary Side: Contains the DC-to-DC conversion stages for the +12V rails. Note that this unit primarily outputs +12V, as modern HP business desktops often use 12V-only motherboards with localized voltage regulation for 5V and 3.3V. Compatibility and Use Cases

Evaluation Boards or Reference Designs: If available, evaluation boards or reference designs can be a goldmine. These often come with detailed schematics, PCB layouts, and BOMs (Bills of Materials).