Overview
The ADM1275-3ACPZ, produced by Analog Devices Inc., is a hot-swap controller designed to enable the safe insertion or removal of circuit boards from a live backplane. This device is crucial in applications where power must be maintained during board swaps, ensuring minimal disruption to the system. The ADM1275-3ACPZ features advanced current and voltage monitoring, along with robust protection mechanisms to safeguard the system and external components.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Nominal Bus Voltage (VDD) | 2.7 | - | 5.5 | V | 3 V to 5 V ± 10% |
| Operating Temperature | -40 | - | 85 | °C | - |
| Supply Current | - | 5 | - | mA | - |
| Current Limit Range | 5 | - | 25 | mV | Resistor-programmable |
| ADC Resolution | - | - | - | 12-bit | - |
| Response Time to Short Circuit | - | - | 370 | ns | - |
| PMBus Interface | - | - | - | - | Fast mode compliant |
| Package Type | - | - | - | - | 20-lead LFCSP |
Key Features
- Current and Voltage Monitoring: The ADM1275-3ACPZ includes a 12-bit ADC for precise current and voltage readback, accessible via a PMBus interface.
- Hot-Swap Capability: Allows safe insertion or removal of circuit boards from a live backplane, ensuring minimal system disruption.
- Current Limiting: Resistor-programmable current limit from 5 mV to 25 mV, with ±1% accuracy.
- Protection Mechanisms: Includes foldback for tighter FET SOA protection, automatic retry or latch-off on current fault, and programmable current limit timer for SOA protection.
- High Gate Drive Voltage: Ensures the lowest RDSON for external N-channel FETs.
- Analog UV and OV Protection: Provides under-voltage and over-voltage protection for the system.
- Programmable GPOs: Multifunction general-purpose outputs for various system control needs.
Applications
- Power Monitoring and Control/Power Budgeting: Ideal for systems requiring precise power management.
- Central Office Equipment: Used in telecommunications and data communication equipment.
- Telecommunication and Data Communication Equipment: Suitable for various telecom and datacom applications.
- PCs/Servers: Applicable in computer and server systems.
- Industrial Production: Used in industrial automation and control systems.
- Smart Home Appliances: Can be integrated into smart home devices for power management.
- Electric Vehicles: Relevant for power management in electric vehicle systems.
- Medical Devices: Suitable for medical equipment requiring reliable power management.
- Internet of Things (IoT): Used in various IoT applications that require efficient power control.
Q & A
- What is the primary function of the ADM1275-3ACPZ?
The primary function of the ADM1275-3ACPZ is to act as a hot-swap controller, allowing the safe insertion or removal of circuit boards from a live backplane while maintaining system power.
- What is the operating voltage range of the ADM1275-3ACPZ?
The operating voltage range of the ADM1275-3ACPZ is from 2.95 V to 20 V.
- What type of ADC does the ADM1275-3ACPZ use?
The ADM1275-3ACPZ uses a 12-bit analog-to-digital converter (ADC) for current and voltage readback.
- How is the current limit set on the ADM1275-3ACPZ?
The current limit on the ADM1275-3ACPZ is set using a resistor divider network from the internal reference voltage to the ISET pin, allowing for a range of 5 mV to 25 mV.
- What protection mechanisms does the ADM1275-3ACPZ offer?
The ADM1275-3ACPZ offers foldback for tighter FET SOA protection, automatic retry or latch-off on current fault, and programmable current limit timer for SOA protection, along with analog UV and OV protection.
- What is the response time to a short circuit for the ADM1275-3ACPZ?
The response time to a short circuit for the ADM1275-3ACPZ is 370 ns.
- What type of interface does the ADM1275-3ACPZ use for communication?
The ADM1275-3ACPZ uses a PMBus fast mode compliant interface for communication.
- What is the package type of the ADM1275-3ACPZ?
The ADM1275-3ACPZ is available in a 20-lead LFCSP package.
- What are some common applications of the ADM1275-3ACPZ?
The ADM1275-3ACPZ is commonly used in power monitoring and control, central office equipment, telecommunication and data communication equipment, PCs/servers, industrial production, smart home appliances, electric vehicles, medical devices, and IoT applications.
- Is the ADM1275-3ACPZ RoHS compliant?
Yes, the ADM1275-3ACPZ is RoHS compliant and lead-free.
