Overview
The ADM1276-3ACPZ-RL, produced by Analog Devices Inc., is a hot swap controller designed to facilitate the safe insertion or removal of a circuit board from a live backplane. This component integrates various features to ensure reliable and controlled power management, including current and voltage monitoring, overcurrent protection, and power-good status indication. It is particularly useful in applications where hot swapping is necessary, such as in central office equipment, telecommunication and data communication systems, and PCs/servers.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Foldback Active | 3.5 | 4 | 4.5 | mV | VFLB = 0 V; VGATE = (SENSE+) + 3 V; IGATE = 0 μA; VSS ≥ 1 V |
| Circuit Breaker Offset | 0.6 | 0.88 | 1.12 | mV | VCB = VSENSECL − VCBOS |
| Severe Overcurrent Voltage Threshold | 40 | 50 | - | mV | VISET = 1.0 V; VFLB > 1.1 V; VSS ≥ 2 V |
| Short Glitch Filter Duration | 90 | 200 | - | ns | VISET > 1.65 V; VSENSE driven from 18 mV to 52 mV; selectable via PMBus |
| Package Type | - | - | - | - | 20-lead LFCSP |
Key Features
- High gate drive voltage to ensure lowest RDSON and tighter FET SOA protection
- Automatic retry or latch-off on current fault
- Programmable current-limit timer for SOA protection
- Programmable, multifunction GPO and power-good status output
- Analog UV and OV protection
- ENABLE pin for control
- Reports power and energy consumption over time via PMBus interface
- PMBus fast mode compliant interface
- Peak detect registers for current and voltage
Applications
- Power monitoring and control/power budgeting
- Central office equipment
- Telecommunication and data communication equipment
- PCs/servers
Q & A
- What is the primary function of the ADM1276-3ACPZ-RL?
The primary function is to allow safe insertion or removal of a circuit board from a live backplane while providing current and voltage monitoring and protection. - What type of package does the ADM1276-3ACPZ-RL come in?
The component comes in a 20-lead LFCSP package. - How does the ADM1276-3ACPZ-RL protect the external FET?
It protects the external FET by limiting the time the FET remains on while the current is at its maximum value and using a foldback resistor network to lower the current limit as the voltage across the FET increases. - What interface does the ADM1276-3ACPZ-RL use for current and voltage data readback?
The component uses a PMBus interface for current and voltage data readback. - Can the ADM1276-3ACPZ-RL be configured for automatic retry or latch-off on overcurrent fault?
Yes, the LATCH pin can be configured for automatic retry or latch-off when an overcurrent fault occurs. - What are some of the key applications of the ADM1276-3ACPZ-RL?
Key applications include power monitoring and control, central office equipment, telecommunication and data communication equipment, and PCs/servers. - How does the ADM1276-3ACPZ-RL report power and energy consumption?
The component reports power and energy consumption over time via the PMBus interface. - What is the purpose of the ENABLE pin on the ADM1276-3ACPZ-RL?
The ENABLE pin is used for control and to report power and energy consumption. - Does the ADM1276-3ACPZ-RL support multiple PMBus addresses?
Yes, up to four unique PMBus addresses can be selected depending on the configuration of the ADR pin. - What kind of protection does the ADM1276-3ACPZ-RL offer against voltage anomalies?
The component offers analog UV and OV protection.
