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Description
The AS2333E is a housekeeping circuit designed for monitoring the outputs of power supplies. It eliminates the need for external dividers by directly sensing all the output rails. This circuit detects both undervoltage and overvoltage conditions. It also includes an undervoltage comparator that can be configured with arbitrary hysteresis to sense a divided down representation of the AC bulk voltage. The housekeeping section provides all the necessary features to allow external capacitors to set the common timing features of PC-type power supplies. Additionally, negative rails can be sensed without a VEE connection, and negative sensing can be disabled without affecting the positive sense section. The AS2333E is available in a 16-lead package and includes outputs for Power OK (POK) and a fault signal.
Specifications and features
- Standard PC Power Good:
- Undervoltage (UV) detection on 4 rails
- Undervoltage (UV) detection of AC/Bulk supply
- Overvoltage (OV) detection on 4 rails
- Open collector Power Good (PG) output
- Programmable Fault output:
- Overvoltage (OV)
- Overvoltage (OV) plus undervoltage (UV)
- Overvoltage (OV) plus undervoltage (UV) after startup delay
- Overvoltage (OV) Crow Bar Driver
- Digital ON/OFF input
- 2.5V Voltage Reference
- Operates from 5V or 12V rail
Application Scenarios
The AS2333E is commonly used in power supply applications, specifically in PC power supplies. It is useful for monitoring the different output rails and detecting undervoltage and overvoltage conditions. With its programmable fault output, it provides flexibility in determining the response to abnormal situations. The AS2333E is also applicable in situations where negative rails need to be sensed without a VEE connection and where negative sensing can be disabled without affecting the positive sense section.
Comparison
Advantages- Eliminates the need for external dividers
- Directly senses all output rails
- Includes undervoltage comparator for AC bulk voltage sensing
- Capable of sensing negative rails without VEE connection
- Flexible programmable fault output
Disadvantages- May require additional components and circuitry for complete power supply monitoring
- 16-lead package may limit space-constrained applications
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Datenblatt
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Beliebte Teile der gleichen Art
- Datasheet: Download AS2333E
- Chipdaten Teil: CD94-AS2333E
- Lagerhaus: China, Hongkong
- Versenden: Innerhalb von 24 Stunden
- Kostenloser Versand: Yes
- Bevorzugter Versand: Yes, 3-5 days
- Letzte Aktualisierung: 2024/06/29 05:13 +0800
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