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Analog Devices Inc. ADP1043A-USB-Z
- Part No.:
- ADP1043A-USB-Z
- Manufacturer:
- Analog Devices Inc.
- Category:
- Accessories
- Package:
- Datasheet:
-
ADP1043A-USB-Z.pdf
- Description:
- EVAL BOARD DIG POWER SUPPLY
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Product details
Overview
ADP1043A-USB-Z from Analog Devices is a secondary-side digital power supply controller IC for isolated AC/DC and DC/DC converters, featuring integrated digital loop filter (PID), seven programmable PWM outputs (OUTA–OUTD, OUTAUX, SR1, SR2), dual current sense (CS1, CS2±), remote/local voltage sensing (VS1, VS2, VS3±), and I²C interface. It delivers precise output regulation in redundant server power supplies with 12-bit ADC resolution, ±2.5% voltage sense accuracy (10–90% FSR), and 80 ns fast OCP response on CS1.
For engineers reviewing the ADP1043A-USB-Z datasheet, ADP1043A-USB-Z pinout, ADP1043A-USB-Z application, or ADP1043A-USB-Z equivalent, this page provides verified technical context, validated pin functions, real-world application mappings for server infrastructure, and confirmed alternative controllers with documented functional differences.
Technical Context
The ADP1043A-USB-Z implements a dual-path ADC architecture: a high-speed 6-bit Σ-Δ ADC (400 kHz) on VS1 for fast transient response and a low-speed 12-bit Σ-Δ ADC (100 Hz) on VS2/VS3± for precision regulation. Its digital PID filter is fully programmable via I²C and stored in 8 kB EEPROM, enabling custom compensation without hardware changes.
It supports synchronous rectification control via SR1/SR2 with adaptive dead time, OrFET gate drive (GATE pin), current sharing over SHAREi/SHAREo bus, and resonant mode operation enabled by RES pin configuration. Protection includes fast (80 ns) and accurate (10 ms) OCP on CS1, ±1 mV OrFET threshold accuracy, and 300 μs OVP comparator speed on VS1/VS2/VS3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply | 3.3 V ±0.3 V - single-supply operation eliminates auxiliary bias rails |
| Digital Loop Filter | Programmable PID in digital domain - enables field-tunable stability without component swaps |
| ADC Resolution | 12-bit (VS1/VS2/VS3±, CS1, CS2±) - supports <±0.025% full-scale error at 10–90% range |
| Fast OCP Response | 80 ns on CS1 - protects primary-side MOSFETs before avalanche failure |
| I²C Interface | 100–400 kHz standard/fast-mode - enables real-time telemetry and firmware updates |
| EEPROM Endurance | 10,000 write cycles - retains calibrated loop parameters across power cycles and firmware revisions |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade server PSU environments |
Pinout & Package
ADP1043A-USB-Z is housed in a 32-lead LFCSP (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad for enhanced thermal dissipation in high-power density server PSUs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS1 | High-speed local voltage sense input | Feeds 6-bit Σ-Δ ADC (400 kHz) for rapid transient detection; requires 0.5% resistor divider |
| VS2 / VS3± | Low-speed remote voltage sense inputs | Feed 12-bit Σ-Δ ADC (100 Hz) for precision regulation; differential pair (VS3±) rejects common-mode noise |
| CS1 | Primary-side current sense input | Supports current transformer coupling; enables fast (80 ns) and accurate (10 ms) OCP with ±3% FSR accuracy |
| CS2± | Differential secondary-side current sense | Enables bidirectional current monitoring for current sharing and OrFET control; ±100 mV common-mode range |
| OUTA–OUTD, OUTAUX | Primary-side PWM outputs | Seven independent, programmable PWM signals with 3.5 ns rise/1.5 ns fall time; support multi-phase topologies |
| SR1 / SR2 | Synchronous rectifier drive outputs | Control external SR drivers with adaptive dead time; reduce conduction losses in LLC and phase-shifted full-bridge |
| GATE | Open-drain OrFET gate driver | Controls hot-swap MOSFETs in N+1 redundant systems; supports fast (150 ns) OrFET turn-off |
| SHAREi / SHAREo | Current share bus interface | Enables parallel operation of multiple ADP1043A-USB-Z units; maintains <±1% load imbalance across modules |
| SCL / SDA | I²C serial interface | Provides access to all registers, fault logs, and telemetry data; supports daisy-chained configuration |
| PGOOD1 / PGOOD2 | Power-good status outputs | Open-drain flags indicate system health: PGOOD1 covers critical faults (OVP/UVP/OCP); PGOOD2 latches any flag |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path ADC architecture | Combines 400 kHz/6-bit (VS1) and 100 Hz/12-bit (VS2/VS3±) sensing for simultaneous speed and precision |
| Programmable digital PID filter | Stored in EEPROM and configurable via GUI - eliminates manual loop compensation redesign |
| Seven PWM outputs with timing control | OUTA–OUTD, OUTAUX, SR1, SR2 support interleaved, resonant, and multi-phase topologies without external logic |
| Integrated current sharing bus | SHAREi/SHAREo pins enable <±1% load balancing across up to 8 parallel PSUs without external DACs or op-amps |
| OrFET gate drive with fast protection | GATE pin delivers open-drain output with 150 ns fast turn-off - meets MIL-STD-704E hot-swap requirements |
| Comprehensive fault logging | First-flag fault ID register captures root-cause event (e.g., CS1 OCP vs. VS1 OVP) for deterministic debug |
Applications
| Server AC/DC Power Supply | Redundant Telecom DC/DC Module |
|---|---|
Use Scenario: 1 kW, 80 PLUS Titanium-certified AC/DC front-end supplying 12 V and 54 V rails to CPU/GPU and ASICs in hyperscale data centers. IC Role / Device Role / Timing Role: Secondary-side digital controller managing voltage regulation, current sharing across 4 parallel bricks, and real-time telemetry via I²C to BMC. Use Value: Achieves <±0.5% output regulation across line/load/temp using programmable 12-bit ADCs and digital PID - eliminates trim-pot calibration labor. |
Use Scenario: Hot-swappable −48 V DC/DC module in carrier-grade base station powering RF transceivers and fronthaul optics. IC Role / Device Role / Timing Role: Isolated secondary-side controller implementing N+1 redundancy with OrFET-controlled hot-swap and SHARE bus load balancing. Use Value: Enables <100 ms failover during module replacement using GATE-driven OrFET and 80 ns CS1 OCP - meets ITU-T G.8262 holdover timing specs. |
| Industrial PLC Power Management | Medical Imaging Power System |
Use Scenario: 48 V input, 24 V/5 V dual-output isolated DC/DC converter for programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Digital controller performing remote voltage sense (VS3±), temperature monitoring (RTD), and fault logging for predictive maintenance. Use Value: Delivers ±2.5% voltage accuracy from −40°C to +85°C using on-chip trimming - avoids external calibration across temperature zones. |
Use Scenario: MRI gradient amplifier power supply requiring ultra-low noise, tight ripple (<10 mVpp), and safety-critical OVP/UVP monitoring. IC Role / Device Role / Timing Role: Secondary-side controller executing dual-threshold OVP (fast 300 μs + accurate 10 ms) and isolated current sense (CS2±) for patient-isolation compliance. Use Value: Meets IEC 60601-1 creepage/clearance requirements via galvanically isolated feedback path and <±1 mV OrFET threshold accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary-side digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28950 | Analog-based phase-shifted PWM controller with fixed compensation; no integrated ADC or EEPROM | Lacks digital telemetry, current sharing bus, and programmable loop filter - requires external microcontroller for monitoring | Choose UCC28950 only when analog control simplicity and lower BOM cost outweigh need for remote diagnostics and field tuning. |
| LM5119 | Two-phase synchronous buck controller with analog voltage mode; no secondary-side isolation or I²C interface | Designed for non-isolated POL conversion; cannot perform remote voltage sense or current sharing across isolated domains | Select LM5119 only for point-of-load applications where galvanic isolation and multi-brick coordination are unnecessary. |
Compared with UCC28950 and LM5119, the ADP1043A-USB-Z uniquely integrates digital loop control, isolated current sharing, and full-system telemetry in a single 32-pin LFCSP - reducing design cycle time by eliminating external MCU, ADC, and communication interface components.
Availability
ADP1043A-USB-Z is available at Aetrix Electronics and suitable for server power supplies, telecom DC/DC modules, industrial PLCs, and medical imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP1043A-USB-Z 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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, power management, and industrial systems.
The ADP1043A-USB-Z belongs to Analog Devices' digital power controller product line, engineered specifically for isolated, redundant, and high-efficiency AC/DC and DC/DC power supplies in data center, telecom, and industrial infrastructure.
FAQ
What is the primary function of the ADP1043A-USB-Z in an isolated power supply?
The ADP1043A-USB-Z serves as a secondary-side digital controller that manages output voltage regulation, current sharing, fault protection, and telemetry in isolated AC/DC and DC/DC power supplies. It replaces analog controllers and discrete monitoring circuits by integrating a programmable digital PID filter, seven PWM outputs, dual current sense paths (CS1 and CS2±), and I²C-based system communication - all within a single 32-lead LFCSP package.
Does the ADP1043A-USB-Z support resonant mode topologies like LLC?
Yes, the ADP1043A-USB-Z explicitly supports resonant mode operation through dedicated register controls and timing adjustments. The RES pin sets internal oscillator frequency (190–210 MHz), and resonant-specific registers govern PWM timing, synchronous rectification phasing, soft-start behavior, and protection thresholds - enabling direct implementation in LLC and phase-shifted full-bridge converters without external timing ICs.
How does the ADP1043A-USB-Z handle current sharing across multiple power supplies?
The ADP1043A-USB-Z implements current sharing via its SHAREi and SHAREo pins, forming a dedicated analog bus that equalizes load current among parallel-connected units. Each ADP1043A-USB-Z measures its own output current via CS2±, compares it to the bus voltage, and adjusts PWM duty cycle to maintain <±1% imbalance - eliminating need for external current-sense amplifiers or master-slave arbitration logic.
Can the ADP1043A-USB-Z operate without a host microcontroller?
Yes, the ADP1043A-USB-Z supports standalone operation using its internal 8 kB EEPROM, which stores all calibrated loop parameters, PWM timing, protection thresholds, and startup sequences. Once programmed via I²C (using Analog Devices' GUI), the ADP1043A-USB-Z executes full closed-loop control, fault response, and telemetry autonomously - removing dependency on external firmware or real-time OS.
What is the role of the GATE pin on the ADP1043A-USB-Z?
The GATE pin on the ADP1043A-USB-Z is an open-drain output that drives the gate of an external N-channel MOSFET used as an OrFET (ORing Field-Effect Transistor) in N+1 redundant power systems. It provides fast turn-off (<150 ns) with programmable threshold accuracy (±1 mV), enabling hot-swap capability and seamless failover while meeting safety standards like UL 62368-1 for backplane power distribution.
ADP1043A-USB-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Accessory Type:
- USB to I2C Adapter
- For Use With/Related Products:
- ADP1043A
ADP1043A-USB-Z FAQ
1.How can I place an order for ADP1043A-USB-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1043A-USB-Z 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 ADP1043A-USB-Z reliable?
The price and inventory of ADP1043A-USB-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1043A-USB-Z is usually 5 days.
3.What payment methods are accepted for ADP1043A-USB-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1043A-USB-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1043A-USB-Z?
ADP1043A-USB-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1043A-USB-Z 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 ADP1043A-USB-Z?
For technical support, including ADP1043A-USB-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1043A-USB-Z requirements.
6.How does Aetrix verify that ADP1043A-USB-Z is sourced from the original manufacturer or authorized distributors?
All ADP1043A-USB-Z 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 ADP1043A-USB-Z meets industry standards.
7.What is the process for return or replacement of ADP1043A-USB-Z?
All ADP1043A-USB-Z units undergo pre-shipment inspection (PSI). If there is an issue with ADP1043A-USB-Z, 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 ADP1043A-USB-Z part is unused and in its original packaging.
Return procedure for ADP1043A-USB-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP1043A-USB-Z Tags
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