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Analog Devices Inc. ADP1071-2ACCZ
- Part No.:
- ADP1071-2ACCZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-TFLGA Exposed Pad
- Datasheet:
-
ADP1071-2ACCZ.pdf
- Description:
- ISOLATED FLYBACK CONTROLLER W/SR
- Quantity:
- Payment:
- Shipping:
Inventory:375
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Product details
Overview
ADP1071-2ACCZ from Analog Devices is a current-mode isolated synchronous flyback controller with integrated iCoupler® isolation, designed for primary-side control in isolated DC-DC power supplies. It supports forced continuous conduction mode (CCM), operates up to 60 V primary input, delivers 1 A primary and secondary MOSFET gate drive, and features <1% accurate feedback regulation - enabling high-efficiency telecom and industrial power conversion.
For engineers reviewing the ADP1071-2ACCZ datasheet, ADP1071-2ACCZ pinout, ADP1071-2ACCZ application, or ADP1071-2ACCZ equivalent, key selection criteria include its 5 kVRMS SOIC_W isolation rating, programmable 50–600 kHz switching frequency, integrated error amplifier, and dual-side driver architecture optimized for synchronous rectification in compact isolated converters.
Technical Context
The ADP1071-2ACCZ implements fixed-frequency current-mode PWM control with slope compensation and cycle-by-cycle input overcurrent protection. Its integrated iCoupler technology replaces optocouplers and signal transformers, transmitting feedback and PWM signals across the isolation barrier without external components.
It features separate primary-side (VIN) and secondary-side (VDD2) supply rails, precision enable with 1.2 V threshold and 3 µA hysteresis current, and dedicated GATE and SR drivers with sub-20 ns rise/fall times. The device enforces an 84% maximum duty cycle and includes dead-time control (30 ns / 52 ns) between primary switch turn-off and secondary rectifier turn-on.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Synchronous flyback with primary-side current-mode control and secondary-side synchronous rectification drive |
| Isolation Rating | 5 kVRMS dielectric withstand (SOIC_W package), certified per UL 1577, VDE 0884-10, CQC GB4943.1 |
| Input Voltage Range | 4.7 V to 60 V on VIN pin - enables direct connection to 24 V/48 V telecom and industrial bus rails |
| Switching Frequency | 50 kHz to 600 kHz, set via RT resistor - supports high-density designs with optimized magnetics and EMI filtering |
| GATE Driver Output | 8 V high-level drive, 1 A peak sink/source, 17 ns rise / 15 ns fall into 2.2 nF - ensures fast, low-loss primary MOSFET switching |
| SR Driver Output | 5 V high-level drive, 1 A peak sink/source, 13 ns rise / 10 ns fall into 2.2 nF - enables efficient low-RDS(on) synchronous rectifier control |
| Feedback Accuracy | ±0.85% at −40°C to +85°C, ±1.25% at −40°C to +125°C - supports tight output voltage regulation without external trimming |
Pinout & Package
ADP1071-2ACCZ is housed in a 16-lead wide-body SOIC (RW-16) package with creepage/clearance ≥7.6 mm and reinforced insulation rated for 5 kVRMS. The package integrates iCoupler isolation between primary and secondary domains, eliminating need for external isolation components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE (Pin 1) | Primary-side MOSFET gate driver output | Drives high-side primary switch; resistor to AGND1 sets open-loop soft-start time |
| AGND1 (Pin 2) | Primary-side analog ground reference | Return path for VIN, EN, CS, MODE (not used), and GATE driver; must be separated from secondary ground |
| VREG1 (Pin 3) | 8 V LDO output for internal circuitry | Supplies internal logic and gate driver; requires ≥1 µF capacitor to AGND1 |
| VIN (Pin 4) | Primary input supply rail | Accepts 4.7–60 V; powers controller core; requires 4.7 µF decoupling to AGND1 |
| EN (Pin 5) | Enable input with precision UVLO | Active-high enable; 1.2 V threshold with 3 µA hysteresis current ensures clean startup under noisy conditions |
| CS (Pin 6) | Current sense input | Monitors primary MOSFET source current via external resistor; includes 150 ns leading-edge blanking |
| RT (Pin 7) | Oscillator timing resistor connection | Sets switching frequency from 50 kHz to 600 kHz via external resistor (e.g., 480 kΩ = 50 kHz) |
| SYNC (Pin 8) | Frequency synchronization input | Accepts external clock (100–600 kHz); locks switching to system master clock for EMI reduction |
| SS2 (Pin 9) | Secondary-side soft-start control | Charges external capacitor during startup; discharges during fault for controlled recovery |
| FB (Pin 10) | Feedback voltage input | Connects to secondary-side error amplifier output via iCoupler; regulates output voltage to 1.2 V reference |
| COMP (Pin 11) | Compensation node for error amplifier | External RC network sets loop stability; transconductance = 250 µS, gain bandwidth = 1 MHz |
| OVP (Pin 12) | Output overvoltage protection input | Detects secondary overvoltage via iCoupler; triggers hiccup mode after 200 ms fault duration |
| SR (Pin 13) | Synchronous rectifier gate driver output | Drives secondary-side MOSFET; 5 V output, 1 A peak, with 462 ns minimum on-time at 300 kHz |
| VDD2 (Pin 14) | Secondary-side supply input | Accepts 4.5–36 V; powers secondary-side circuits including SR driver and iCoupler receiver |
| AGND2 (Pin 15) | Secondary-side analog ground | Return path for VDD2, FB, COMP, OVP, SR; galvanically isolated from AGND1 |
| VREG2 (Pin 16) | Secondary-side 5 V LDO output | Provides regulated bias for secondary-side error amplifier; requires 1 µF capacitor to AGND2 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated iCoupler isolation | Eliminates optocouplers and signal transformers, reducing BOM count and improving long-term reliability in isolated flyback systems |
| Dual independent MOSFET drivers | 1 A primary GATE and 1 A secondary SR drivers with matched timing ensure precise synchronous rectification and minimal conduction loss |
| Programmable soft start & precharged load support | Configurable open-loop soft start (via GATE resistor) and SS2-controlled secondary ramp prevent inrush current in hot-plug applications |
| Comprehensive protection suite | Includes cycle-by-cycle OCP, output OVP hiccup, overtemperature shutdown (155°C), and precision enable UVLO with hysteresis |
| Reinforced safety certification | UL 1577, VDE 0884-10, and CQC GB4943.1 compliance support medical, industrial, and telecom end-equipment approvals |
Applications
| Telecom Power Supply | PoE Powered Device |
|---|---|
Use Scenario: Isolated 48 V input to 12 V/5 V output DC-DC converter in base station remote radio units. IC Role / Device Role / Timing Role: Primary-side synchronous flyback controller with iCoupler-based feedback, managing PWM, gate drive, and protection functions. Use Value: Enables >92% efficiency at full load and eliminates optocoupler aging drift, ensuring stable regulation over 10+ year field life. | Use Scenario: 802.3at/af PoE PD interface delivering isolated 5 V/3.3 V rails to Ethernet switch PHY and MCU. IC Role / Device Role / Timing Role: Isolated flyback controller with integrated secondary-side SR driver and OVP detection for safe operation under variable PoE input. Use Value: Supports rapid startup from precharged loads and maintains tight output regulation despite PoE voltage sag (37–57 V range). |
| Industrial PLC I/O Module | Enterprise Network Switch |
Use Scenario: 24 V DC input to isolated 5 V/3.3 V power for analog sensor front-end and digital isolator interfaces. IC Role / Device Role / Timing Role: Synchronous flyback controller providing reinforced 5 kVRMS isolation between field-side and logic-side domains. Use Value: Meets IEC 61000-4-5 surge immunity requirements and enables compact PCB layout with no external isolation components. | Use Scenario: Multi-output isolated DC-DC stage powering CPU cores, memory, and management ASICs in 1U rack switches. IC Role / Device Role / Timing Role: High-frequency (300–600 kHz) flyback controller with synchronized switching to reduce conducted EMI in dense board layouts. Use Value: Frequency sync capability allows alignment with system clock tree, easing EMI filter design and passing CISPR 32 Class B limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28911DR | No integrated isolation; requires external transformer or optocoupler for feedback; no secondary-side SR driver | Suitable for cost-sensitive, non-safety-critical AC-DC adapters where reinforced isolation is not mandated | Choose UCC28911DR only when iCoupler integration and dual-side drive are unnecessary and BOM cost is prioritized over reliability and layout simplicity |
| LT3748IMS#PBF | Uses transformer-coupled feedback instead of digital isolation; no integrated secondary-side driver; higher external component count | Targeted at high-voltage industrial flyback designs (>100 V input) where transformer-based sensing is preferred | Select LT3748IMS#PBF when operating above 60 V input or when legacy transformer feedback architecture is already standardized in the design |
Compared with UCC28911DR and LT3748IMS#PBF, ADP1071-2ACCZ uniquely integrates iCoupler isolation and dual MOSFET drivers in a single SOIC_W package, reducing total solution size by ~35% and eliminating feedback loop latency and optocoupler CTR degradation concerns.
Availability
ADP1071-2ACCZ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and enterprise networking equipment requiring stable component supply, long-lifecycle support, and certified reinforced isolation.
Supply support for ADP1071-2ACCZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and healthcare markets.
The ADP1071 product line delivers isolated power control ICs with integrated iCoupler technology, targeting compact, high-reliability DC-DC converters for telecom, industrial, and networking applications where safety certification and reduced system complexity are critical.
FAQ
What is the maximum input voltage supported by the ADP1071-2ACCZ?
The ADP1071-2ACCZ supports a primary input voltage range of 4.7 V to 60 V on the VIN pin, with absolute maximum rating of 66 V. This makes it suitable for 24 V and 48 V industrial and telecom bus applications. Operation above 60 V is not permitted and may cause permanent damage, as confirmed in the Absolute Maximum Ratings table of the Rev. C datasheet.
Does the ADP1071-2ACCZ support synchronous rectification on the secondary side?
Yes, the ADP1071-2ACCZ integrates a dedicated 1 A secondary-side MOSFET driver (SR pin) with 13 ns rise time and 462 ns minimum on-time at 300 kHz. It works in conjunction with the iCoupler-isolated feedback path to enable precise timing control of synchronous rectifiers, improving efficiency over diode-based solutions - especially at medium-to-heavy loads.
What isolation certifications apply to the ADP1071-2ACCZ in the SOIC_W package?
The ADP1071-2ACCZ in the SOIC_W package carries pending UL 1577 recognition, VDE 0884-10 certification, CSA Component Acceptance Notice 5A, and CQC GB4943.1-2011 approval. Its 5 kVRMS isolation rating meets reinforced insulation requirements for 1 MOPP (IEC 60601-1) and 2 MOPP systems, with VIORM = 849 VPEAK and VIOTM = 8000 VPEAK per VDE standards.
Can the ADP1071-2ACCZ operate in discontinuous conduction mode (DCM)?
No - the ADP1071-2ACCZ is specifically designed for forced continuous conduction mode (CCM) operation, unlike the ADP1071-1 which supports programmable light-load mode (LLM) or CCM. Its control architecture and internal compensation are optimized for CCM-only behavior, ensuring predictable loop response and minimized output ripple across all load conditions.
How is output voltage regulation achieved in the ADP1071-2ACCZ?
Output voltage regulation in the ADP1071-2ACCZ is achieved by sensing the secondary-side output via an error amplifier, then transmitting the feedback signal across the isolation barrier using Analog Devices' integrated iCoupler technology. The COMP pin hosts the error amplifier's compensation network, and the FB pin receives the isolated feedback signal referenced to a precise 1.2 V internal bandgap, enabling ±0.85% regulation accuracy over temperature.
ADP1071-2ACCZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TFLGA Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Flyback, Forward Converters
- Voltage - Input:
- 0.4V ~ 3V
- Voltage - Supply:
- 4.7V ~ 60V
- Current - Supply:
- 22 mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LGA (8x4)
ADP1071-2ACCZ FAQ
1.How can I place an order for ADP1071-2ACCZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1071-2ACCZ 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 ADP1071-2ACCZ reliable?
The price and inventory of ADP1071-2ACCZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1071-2ACCZ is usually 5 days.
3.What payment methods are accepted for ADP1071-2ACCZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1071-2ACCZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1071-2ACCZ?
ADP1071-2ACCZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1071-2ACCZ 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 ADP1071-2ACCZ?
For technical support, including ADP1071-2ACCZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1071-2ACCZ requirements.
6.How does Aetrix verify that ADP1071-2ACCZ is sourced from the original manufacturer or authorized distributors?
All ADP1071-2ACCZ 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 ADP1071-2ACCZ meets industry standards.
7.What is the process for return or replacement of ADP1071-2ACCZ?
All ADP1071-2ACCZ units undergo pre-shipment inspection (PSI). If there is an issue with ADP1071-2ACCZ, 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 ADP1071-2ACCZ part is unused and in its original packaging.
Return procedure for ADP1071-2ACCZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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