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Analog Devices Inc. ADM1041ARQZ-REEL
- Part No.:
- ADM1041ARQZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADM1041ARQZ-REEL.pdf
- Description:
- IC SECONDARY SIDE CTRLR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,417
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Product details
Overview
ADM1041ARQZ-REEL from Analog Devices is a secondary-side controller IC for N+1 redundant server power supplies, providing voltage regulation, current sharing, OrFET gate control, and comprehensive fault monitoring. It integrates differential remote voltage/current sensing, SMBus/I²C interface, 352-byte field EEPROM, and programmable soft-start with ±3% total current sense error (chopper on) across –40°C to +85°C.
For engineers reviewing the ADM1041ARQZ-REEL datasheet, ADM1041ARQZ-REEL pinout, ADM1041ARQZ-REEL application, or ADM1041ARQZ-REEL equivalent, this device supports digital calibration of load voltage (1.7–2.3 V nominal), current limit (105–130%), and share bus offset (±100 mV window), with real-time fault interrogation via SMBus for network server and web server power management systems.
Technical Context
The ADM1041ARQZ-REEL implements a closed-loop secondary-side control architecture using three core inputs: differential remote voltage sense (VS+/VS−), differential current sense (CS+/CS−), and current-share bus feedback (SHRO/SHRS). Its VCMP output drives an optocoupler to regulate the primary-side PWM controller, enabling precise output voltage stabilization without manual trimming.
It features dual-mode current sensing-resistor-based (ISENSE) with gain settings from 65× to 230×, or current-transformer-based (ICT) with 2.57×/4.5× options-and integrated OrFET reverse-voltage detection (20–250 mV turn-on threshold) with FG pin shutdown in <2 μs during short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply | 4.5 V to 5.5 V - powers all analog/digital blocks; includes 400 μs VDDOK debounce for stable startup |
| Differential Voltage Sense | 1.7–2.3 V VNOM range - digitally trimmable in 0.10–0.14% steps for precise load voltage margining |
| Current Sense Error | ±3% total (gain + offset) - chopper-stabilized amplifier ensures accuracy over temperature and time |
| SMBus Interface | I²C-compatible, 400 kHz max - enables microcontroller read/write of 352-byte field EEPROM and 160-byte calibration memory |
| OrFET Control | FG pin open-drain N-channel - sinks 55 mA short-circuit current to disconnect supply within 2 μs of reverse-voltage detection |
| Soft-Start Period | 0–40 ms programmable - 7-bit ramp control (Reg 10h[3:2]) prevents inrush current in high-density server rails |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade server PSU environments with 150°C max junction temperature |
Pinout & Package
ADM1041ARQZ-REEL is housed in a 24-lead QSOP package (5.3 mm × 7.2 mm, 0.65 mm pitch) with exposed pad for thermal performance. Pin functions are validated per Analog Devices Rev. 0 datasheet Figures 1, 3, and 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 5 V ±10% main supply; powers internal regulators, EEPROM, and I/O buffers |
| VS+, VS− | Differential remote voltage sense | Measures load output voltage at point-of-load; rejects common-mode noise up to VDD − 2 V |
| CS+, CS− | Differential current sense input | Accepts mV-level signals from sense resistor or current transformer; supports 9.5–44.5 mV full-scale ranges |
| SHRO, SHRS+ | Current-share bus drive/receive | Drives shared bus with rail-to-rail output (VDD − 0.4 V); monitors master/slave arbitration via ±100–400 mV window comparator |
| FG | OrFET gate driver output | Open-drain N-channel output; asserts low to shut down OrFET during reverse-voltage fault (e.g., rectifier short) |
| SCL, SDA | SMBus serial interface | I²C-compatible bidirectional lines; support broadcast addressing and ARA for multi-device coordination |
| PSON, PEN, DC_OK | Power sequencing/status outputs | Configurable open-drain/P-channel outputs with programmable on/off delays (0–1600 ms) for system-level power management |
Key Features
| Feature | Design Value |
|---|---|
| Digital calibration via EEPROM | 160-byte dedicated calibration memory + 352-byte field data storage enables post-manufacturing trim of voltage, current, and timing parameters |
| Standalone or microcontroller operation | No external MCU required - internal state machine handles voltage regulation, current share, and fault response autonomously |
| Differential remote sense amplifier | 35 kΩ VS− input resistance and 500 kΩ VS+ input resistance minimize loading error on high-impedance divider networks |
| Programmable soft-start slew rate | Four discrete ramp periods (300 μs to 40 ms) prevent output overshoot and reduce stress on downstream capacitors |
| Comprehensive fault detection | Simultaneous monitoring of overvoltage (5–25 μs filter), undervoltage (300–600 μs), overcurrent, overtemperature (MON5), and ground continuity |
Applications
| Server Power Supply Control | Redundant N+1 Power Architecture |
|---|---|
Use Scenario: Regulating 12 V output rails in dual-CPU rack servers with hot-swap capability and dynamic load steps up to 100 A. IC Role / Device Role / Timing Role: Secondary-side controller generating optocoupler-driven error signal (VCMP) to primary PWM while managing current share across parallel modules. Use Value: Eliminates manual calibration and reduces external component count by integrating voltage-error amp, current-sense amp, share bus driver, and SMBus interface in one QSOP-24. |
Use Scenario: Coordinating three identical 800 W PSUs in telecom base station power shelf where failure of one unit must not disrupt 48 V load. IC Role / Device Role / Timing Role: Master/slave current-share arbitrator using SHRO/SHRS bus with ±100 mV window comparator to balance load within ±1% across units. Use Value: Enables true N+1 redundancy with automatic load redistribution and fault isolation via FG-driven OrFET shutdown in <2 μs during short-circuit events. |
| OrFET-Based High-Efficiency OR'ing | Intelligent Power Housekeeping |
Use Scenario: Replacing Schottky diodes in 48 V intermediate bus architecture to reduce conduction loss and thermal footprint in space-constrained 1U servers. IC Role / Device Role / Timing Role: Reverse-voltage detector (FS/FD pins) and gate driver (FG) controlling external N-channel MOSFET as ideal diode. Use Value: Cuts forward voltage drop from ~0.4 V to <50 mV, improving efficiency by >1.5% at 60 A and enabling smaller heatsinks. |
Use Scenario: Monitoring thermistor (MON2), AC mains status (AC_OK), and DC output health (DC_OK, LOADVOK) in modular power system firmware. IC Role / Device Role / Timing Role: Multi-channel analog monitor with programmable thresholds (e.g., MON5 OTP trip at 2.2–2.45 V) and SMBus-accessible status registers. Use Value: Provides centralized, software-readable fault logging (e.g., "OrFET shutdown due to reverse voltage") without adding discrete comparators or ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary-side power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1041ARQZ | Same die, non-reel packaging (tube); identical electrical specs and pinout | No functional difference - differs only in tape-and-reel vs. tube delivery format | Select ADM1041ARQZ-REEL for automated SMT assembly; ADM1041ARQZ for prototyping or low-volume hand placement |
| UCD9222RGZR | Dual-output digital PWM controller with integrated MOSFET drivers; requires external MCU for configuration; no built-in EEPROM calibration | Targets multi-rail POL converters with tight sequencing; lacks standalone OrFET control and analog housekeeping integration | Choose UCD9222RGZR when designing new multi-output digital PSUs with PMBus; retain ADM1041ARQZ-REEL for analog-centric, single-rail N+1 server supplies needing plug-and-play calibration |
Compared with ADM1041ARQZ-REEL, the ADM1041ARQZ offers identical functionality in tube packaging for manual assembly, while the UCD9222RGZR provides digital multi-rail control but requires external firmware development and lacks integrated OrFET supervision - making ADM1041ARQZ-REEL optimal for cost-sensitive, high-reliability server PSU secondary-side control.
Availability
ADM1041ARQZ-REEL is available at Aetrix Electronics and suitable for network server power supplies, web server redundant PSUs, and industrial embedded power management systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADM1041ARQZ-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The ADM1041A product line was designed specifically for secondary-side control in N+1 redundant server power supplies, integrating voltage regulation, current sharing, OrFET management, and housekeeping functions into a single IC to eliminate manual calibration and reduce bill-of-materials.
FAQ
What is the primary function of the ADM1041ARQZ-REEL in a power supply system?
The ADM1041ARQZ-REEL serves as a secondary-side controller that regulates output voltage, balances current across parallel power modules, manages OrFET-based OR'ing diodes, and monitors faults including overvoltage, undervoltage, overcurrent, and overtemperature. It generates the VCMP error signal sent to the primary-side PWM controller via optocoupler, enabling closed-loop regulation without manual calibration. The ADM1041ARQZ-REEL integrates all these functions in a single QSOP-24 package with SMBus interface and EEPROM for field programming.
Does the ADM1041ARQZ-REEL support both resistor-based and transformer-based current sensing?
Yes, the ADM1041ARQZ-REEL supports dual-mode current sensing: resistor-based (ISENSE) with six programmable gain settings (65× to 230×) for sense-resistor applications, and current-transformer-based (ICT) with two gain options (2.57× or 4.5×) for isolated current measurement. Configuration is controlled via Register 17h[7] and Register 16h[2:0], and both modes provide ±3% total current sense error (chopper on) across –40°C to +85°C. The ADM1041ARQZ-REEL's flexible sensing architecture allows designers to select the optimal method based on isolation requirements and accuracy needs.
How does the ADM1041ARQZ-REEL implement current sharing in N+1 redundant systems?
The ADM1041ARQZ-REEL implements current sharing via its SHRO (share output) and SHRS (share sense) pins, forming a wired-OR bus that equalizes load current among parallel power modules. It uses an ISHARE error amplifier with a programmable ±100–400 mV window comparator (Reg 04h[1:0]) to detect imbalance and adjust VCMP accordingly. The ADM1041ARQZ-REEL also supports zero-current offset trim (Reg 05h[7:0]) and current share capture range selection (Reg 10h[5:4]) to ensure ±1% current matching across modules under varying load and temperature conditions.
What protection features does the ADM1041ARQZ-REEL provide for OrFET control?
The ADM1041ARQZ-REEL provides dedicated OrFET protection through reverse-voltage detection on the FS (CS−) and FD pins, with programmable turn-on thresholds (20–50 mV) and turn-off thresholds (100–250 mV) set via Register 03h[7:4]. Upon detecting reverse voltage - such as during a rectifier short - the FG pin asserts low within 2 μs to shut down the external N-channel MOSFET. The ADM1041ARQZ-REEL also monitors OrFET OK status and reports faults via SMBus registers, enabling rapid diagnostics without additional circuitry.
Can the ADM1041ARQZ-REEL operate without a microcontroller?
Yes, the ADM1041ARQZ-REEL is designed for standalone operation: its internal state machine handles voltage regulation, current sharing, soft-start, and fault response autonomously using factory- or field-programmed EEPROM values. The SMBus interface is optional for configuration and monitoring; it is not required for basic functionality. The ADM1041ARQZ-REEL supports microcontroller co-operation via broadcast commands and alert response addressing (ARA), but all critical control loops remain active even with SCL/SDA unconnected.
ADM1041ARQZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Power Supply, Servers
- Voltage - Input:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply:
- 6 mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
ADM1041ARQZ-REEL FAQ
1.How can I place an order for ADM1041ARQZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1041ARQZ-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM1041ARQZ-REEL reliable?
The price and inventory of ADM1041ARQZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1041ARQZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM1041ARQZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1041ARQZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1041ARQZ-REEL?
ADM1041ARQZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1041ARQZ-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM1041ARQZ-REEL?
For technical support, including ADM1041ARQZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1041ARQZ-REEL requirements.
6.How does Aetrix verify that ADM1041ARQZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1041ARQZ-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM1041ARQZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM1041ARQZ-REEL?
All ADM1041ARQZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1041ARQZ-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM1041ARQZ-REEL part is unused and in its original packaging.
Return procedure for ADM1041ARQZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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