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Analog Devices Inc. ADP1046AACPZ-R7
- Part No.:
- ADP1046AACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP1046AACPZ-R7.pdf
- Description:
- IC DGTL CTRLR 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
ADP1046AACPZ-R7 from Analog Devices is a digital secondary-side PWM controller for isolated ac-to-dc and dc-to-dc power supplies, featuring 7 programmable PWM outputs (OUTA–OUTD, OUTAUX, SR1, SR2), integrated digital loop filter, I²C interface, and dual current sense (CS1, CS2±) with ±2.0% OCP/OVP accuracy. It supports synchronous rectification, OrFET control, and voltage line feedforward to maximize efficiency in server and telecom power systems.
For engineers reviewing the ADP1046AACPZ-R7 datasheet, ADP1046AACPZ-R7 pinout, ADP1046AACPZ-R7 application, or ADP1046AACPZ-R7 equivalent, key selection criteria include its 32-lead LFCSP package, 3.3 V single-supply operation, 12-bit ADC resolution across VS1/VS2/VS3/CS1/CS2/ACSNS/RTD channels, and EEPROM-programmable soft start, loop compensation, and fault thresholds - all critical for high-density, digitally managed PSUs.
Technical Context
The ADP1046AACPZ-R7 implements a fully digital control architecture with dedicated hardware accelerators for real-time voltage and current sensing, enabling sub-100 ns fast OCP response (CS1: 80–100 ns) and 80 µs OVP detection. Its dual-path ADC subsystem supports simultaneous low-speed (10 ms update rate) and high-speed (390.6 kHz sampling) measurements for VS3 and ACSNS, directly feeding feedforward and resonant-mode timing adjustments.
Control execution is synchronized to an internal 200 MHz PLL (±5% tolerance with 10 kΩ RES), and all loop parameters - including PID coefficients, modulation limits, and slew rates - are stored in user-accessible EEPROM with CRC checksum protection. The I²C interface operates up to 400 kHz with full register-level telemetry, fault logging, and calibration data access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 3.6 V - single-rail operation compatible with standard 3.3 V system rails; UVLO at 2.85 V ensures clean startup. |
| PWM Outputs | 7 signals (OUTA–OUTD, OUTAUX, SR1, SR2) - enables multi-phase primary switching and dual synchronous rectifier drive without external logic. |
| ADC Resolution | 12-bit for VS1/VS2/VS3/CS1/CS2/ACSNS/RTD - supports precise closed-loop regulation and telemetry with ±2.0% measurement accuracy over 10–90% input range. |
| OCP Response Time | 80–100 ns (CS1 fast path) - enables immediate shutdown during primary-side overcurrent events, protecting MOSFETs before thermal damage occurs. |
| I²C Interface | Up to 400 kHz Fast Mode - allows real-time configuration, telemetry readback, and fault register polling without interrupting PWM operation. |
| EEPROM Endurance | 10,000 cycles at 85°C - supports field-updatable loop filters, soft-start profiles, and safety thresholds across product lifetime. |
| Package | 32-lead LFCSP (5 mm × 5 mm, 0.5 mm pitch) - thermally enhanced exposed pad improves thermal resistance (θJC = 6.4°C/W) for high-power density designs. |
Pinout & Package
The ADP1046AACPZ-R7 is housed in a 32-lead Lead Frame Chip Scale Package (LFCSP) with an exposed thermal pad on the underside, requiring solder connection to the PCB AGND plane for optimal thermal performance and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS1, VS2, VS3+, VS3− | Output voltage sense inputs | Differential and single-ended analog inputs for local (VS1), remote (VS2), and auxiliary (VS3) rail monitoring; support factory-trimmed ±16 mV accuracy at 1 V nominal. |
| CS1 | Primary-side current sense | High-speed comparator + ADC input for primary switch current; enables fast OCP (80 ns) and accurate DC current measurement (±3.0% FSR). |
| CS2+, CS2− | Differential secondary-side current sense | 12-bit differential ADC input supporting ±2.1% accuracy over 0–110 mV range; configurable for high-side or low-side sensing with 0.1% resistor network. |
| ACSNS | AC sense / voltage feedforward input | Shared input for AC ripple detection and line-voltage feedforward; enables dynamic loop bandwidth adjustment to maintain regulation under line transients. |
| OUTA–OUTD, OUTAUX, SR1, SR2 | PWM output drivers | Seven 3.3 V-compatible gate-drive outputs with <3.5 ns rise time; individually configurable for phase-shifted, interleaved, or burst-mode operation. |
| GATE | OrFET control output | Open-drain output for driving external OR-ing FETs in redundant power systems; supports fast turn-off during reverse-current faults. |
| SHAREi / SHAREo | Current share interface | Digital current-sharing bus for parallel PSU operation; enables master-slave or droop-based load balancing without external DACs or op-amps. |
| SDA / SCL | I²C serial interface | Standard two-wire bus supporting full register access, telemetry streaming, and EEPROM programming at up to 400 kHz. |
| RTD | Temperature sensor interface | Programmable current source (10–46 µA) for NTC/PTC thermistors; supports ±5°C accuracy from 100°C to 125°C with internal linearization. |
| PSON, PGOOD1, PGOOD2 | Power sequencing control | Enable input and dual open-drain power-good outputs with programmable delay and threshold; simplifies multi-rail sequencing in server VRMs. |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop filter with EEPROM storage | Full PID+feedforward coefficients stored nonvolatilely; eliminates manual compensation tuning and enables field updates without hardware change. |
| Voltage line feedforward via ACSNS | Real-time adjustment of loop gain and modulation limit based on input voltage ripple; maintains tight regulation during 48 V bus transients in telecom systems. |
| Synchronous rectifier timing control | Independent SR1/SR2 delay registers with 1 ns resolution; minimizes body-diode conduction loss in LLC and phase-shifted full-bridge topologies. |
| Redundant OrFET control (GATE pin) | Hardware-accelerated reverse-current detection with <150 ns response; enables hot-swap capability and N+1 redundancy in datacenter PSUs. |
| Multi-channel 12-bit telemetry ADC | Simultaneous sampling of 7 analog inputs (VS1–VS3, CS1, CS2±, ACSNS, RTD); provides full-system health monitoring without external ADCs. |
Applications
| Server VRM Control | Telecom Rectifier Module |
|---|---|
Use Scenario: Regulating 12 V or 48 V intermediate bus in dual-CPU server motherboards with dynamic load steps up to 100 A/µs. IC Role / Device Role / Timing Role: Secondary-side digital controller managing synchronous rectifiers, current sharing across multiple phases, and fast transient response via programmable digital loop. Use Value: Achieves <1% output deviation during 50 A load step with 200 kHz switching, enabled by 12-bit VS1/CS1 ADC and 80 ns OCP path. | Use Scenario: 48 V input, 12 V output telecom rectifier with N+1 redundancy and hot-swap capability. IC Role / Device Role / Timing Role: OrFET controller and current-sharing manager coordinating up to 4 parallel modules via SHAREi/SHAREo bus. Use Value: Enables seamless failover within 200 ns using GATE pin and hardware-based current balance, eliminating need for external current-sense amplifiers. |
| Industrial Isolated DC-DC | Network Equipment Power |
Use Scenario: 24 V input, 3.3 V/5 V/12 V triple-output isolated converter for PLC backplanes with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Central digital controller implementing burst-mode light-load operation, resonant-mode timing, and independent soft-start sequencing per rail. Use Value: Reduces no-load power to <300 mW via programmable burst threshold and adaptive gate drive, meeting IEC 62368-1 standby requirements. | Use Scenario: High-density 1 RU switch power supply with 3.3 V, 5 V, and 12 V outputs, requiring PMBus-compatible telemetry and fault logging. IC Role / Device Role / Timing Role: I²C-based digital power manager providing real-time voltage/current/power readings, first-fault identification, and EEPROM-stored calibration data. Use Value: Delivers ±0.5% voltage readback accuracy and timestamped fault logs (OVP/OCP/OTP) accessible via standard PMBus commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital secondary-side controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28950RTJT | Analog-based phase-shifted PWM controller with fixed compensation; no integrated ADC, EEPROM, or I²C telemetry. | Lacks digital programmability and real-time telemetry; suited for cost-sensitive, fixed-function isolated PSUs without redundancy or firmware updates. | Select UCC28950RTJT only when digital flexibility, field calibration, or multi-rail sequencing are not required. |
| ADP1047ACPZ-R7 | Pin-compatible successor with enhanced feedforward resolution, faster 50 ns CS1 OCP, and extended temperature grade (−40°C to +135°C junction). | Supports higher ambient environments and tighter transient response; requires updated GUI firmware but same PCB layout. | Choose ADP1047ACPZ-R7 for new designs targeting >125°C ambient or sub-50 ns OCP response; ADP1046AACPZ-R7 remains valid for legacy qualification. |
Compared with UCC28950RTJT, ADP1046AACPZ-R7 delivers full digital configurability, embedded telemetry, and EEPROM-based safety-critical parameter storage - essential for infrastructure-grade PSUs requiring field updates and audit-ready fault logs. Against ADP1047ACPZ-R7, it trades minor OCP speed and temp grade for proven qualification in deployed server platforms.
Availability
ADP1046AACPZ-R7 is available at Aetrix Electronics and suitable for server VRMs, telecom rectifiers, industrial isolated DC-DC converters, and network equipment power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP1046AACPZ-R7 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, serving precision instrumentation, industrial automation, communications, and power management markets.
The ADP1046AACPZ-R7 belongs to Analog Devices' Digital Power Controller product line, engineered specifically for high-efficiency, digitally managed isolated power supplies in datacenter, telecom, and industrial infrastructure where programmability, telemetry, and reliability are mandatory.
FAQ
What is the operating supply voltage range for the ADP1046AACPZ-R7?
The ADP1046AACPZ-R7 operates from a single 3.0 V to 3.6 V supply, with a typical nominal voltage of 3.3 V. Its UVLO threshold is 2.85 V (with 40 mV hysteresis), ensuring robust startup behavior under brownout conditions. The device draws 20 mA in normal operation and enters <100 µA shutdown mode when VDD falls below UVLO, making it suitable for energy-conscious isolated power designs.
Does the ADP1046AACPZ-R7 support resonant-mode topologies like LLC?
Yes, the ADP1046AACPZ-R7 explicitly supports resonant-mode operation through dedicated registers for frequency limiting, PWM timing adjustment, synchronous rectification control, and soft-start sequencing in resonant mode. Its ACSNS input feeds real-time line information into the digital loop, and the 390.6 kHz high-speed VS3 ADC enables precise volt-second balancing - critical for stable LLC half-bridge regulation.
How many independent PWM outputs does the ADP1046AACPZ-R7 provide?
The ADP1046AACPZ-R7 provides seven independent PWM outputs: OUTA, OUTB, OUTC, OUTD, OUTAUX, SR1, and SR2. Each is individually configurable for phase, dead time, and modulation mode. OUTA–OUTD drive primary-side switches, OUTAUX serves auxiliary functions, and SR1/SR2 control synchronous rectifiers - enabling full digital control of complex multi-phase isolated topologies without external logic.
Can the ADP1046AACPZ-R7 perform current sharing between parallel power supplies?
Yes, the ADP1046AACPZ-R7 supports hardware-based current sharing via dedicated SHAREi (input) and SHAREo (output) pins. It implements both master-slave and droop-based schemes using a digital current-share bus, eliminating external DACs or op-amps. The feature is fully programmable through I²C registers and validated for N+1 redundant systems in telecom rectifier applications.
Is EEPROM programming required to operate the ADP1046AACPZ-R7 out of reset?
No, the ADP1046AACPZ-R7 boots with factory-default settings stored in ROM, enabling immediate operation without EEPROM programming. However, full functionality - including custom loop compensation, soft-start profiles, fault thresholds, and telemetry calibration - requires writing user-defined values to the internal EEPROM. The GUI tool automates this process, and EEPROM writes are protected by password and CRC validation.
ADP1046AACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Power Supplies
- Voltage - Input:
- 0V ~ 1.6V
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 20 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
ADP1046AACPZ-R7 FAQ
1.How can I place an order for ADP1046AACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1046AACPZ-R7 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 ADP1046AACPZ-R7 reliable?
The price and inventory of ADP1046AACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1046AACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP1046AACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1046AACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1046AACPZ-R7?
ADP1046AACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1046AACPZ-R7 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 ADP1046AACPZ-R7?
For technical support, including ADP1046AACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1046AACPZ-R7 requirements.
6.How does Aetrix verify that ADP1046AACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1046AACPZ-R7 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 ADP1046AACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP1046AACPZ-R7?
All ADP1046AACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1046AACPZ-R7, 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 ADP1046AACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP1046AACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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