The PS-4241-9HA is a 240W Power Supply Unit (PSU) manufactured by HP for use in their small form factor (SFF) desktop computers. While a complete proprietary schematic is typically not released to the public by HP, the unit's design and technical specifications provide a clear roadmap of its internal architecture and role within enterprise computing. Technical Architecture and Efficiency
Monitoring and Control The monitoring and control block includes various monitoring functions, such as voltage monitoring, current monitoring, and temperature monitoring. The block also includes control functions, such as enable/disable control and PWM control. ps42419ha schematic top
PFC (Power Factor Correction): Active PFC circuitry ensures the unit maintains high efficiency. Secondary Side (Low Voltage): The PS-4241-9HA is a 240W Power Supply Unit
Chip Level Details: For information on internal controllers and component-level identification, resources like Fixtronics provide close-up views of the PCB. Reverse-voltage protection (diode or ideal diode MOSFET) on
PS-4241-9HA is a 240W Power Supply Unit (PSU) commonly found in business-class desktops like the HP Compaq 6000, 6200, 8000, and 8200 Pro
AC Input -- Fuse -- NTC -- CM Choke -- X-Cap -- Bridge Rectifier (+) --- HV Startup Resistor --- Bulk Cap (+) ------> Transformer T1 primary start
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+-----> PS42419HA Pin 1 (D/ST) |
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Transformer T1 auxiliary winding --> Diode --> VCC Cap (+) --- PS42419HA Pin 2 (VCC)
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+-----> Zener OVP
PS42419HA Pin 6 (FB) <---- Optocoupler Transistor Collector
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GND Optocoupler LED cathode ---- TL431 Cathode
TL431 Ref ---- Resistor Divider from Output (+)
TL431 Anode ---- GND (secondary)
When designing with the PS42419HA, consider the following key factors:
- Reverse-voltage protection (diode or ideal diode MOSFET) on supply input if needed.
- Input current-limiting resistor or fuse for power inputs.