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Analog Devices Inc. ADP1071-1ACCZ
- Part No.:
- ADP1071-1ACCZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-TFLGA Exposed Pad
- Datasheet:
-
ADP1071-1ACCZ.pdf
- Description:
- ISOLATED FLYBACK CONTROLLER W/LI
- Quantity:
- Payment:
- Shipping:
Inventory:137
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Product details
Overview
ADP1071-1ACCZ from Analog Devices is a current-mode isolated synchronous flyback controller with integrated iCoupler® isolation, designed for high-input-voltage isolated DC-DC power supplies. It supports programmable light-load mode (LLM) or continuous conduction mode (CCM), delivers 5 kVRMS isolation in SOIC_W package, and integrates primary-side 1A MOSFET driver and secondary-side 1A synchronous rectifier drivers - enabling compact, high-efficiency telecom and industrial power designs.
For engineers reviewing the ADP1071-1ACCZ datasheet, ADP1071-1ACCZ pinout, ADP1071-1ACCZ application, or ADP1071-1ACCZ equivalent, key selection criteria include its 50–600 kHz programmable switching frequency, 85% duty cycle clamp, ±1.25% feedback accuracy over −40°C to +125°C, integrated error amplifier, and dual-supply operation (VREG1 up to 12.5 V, VDD2 up to 36 V).
Technical Context
The ADP1071-1ACCZ implements fixed-frequency current-mode PWM control with programmable 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 dual independent supply domains: primary-side VREG1 (regulated LDO, 4.7–12.5 V) powers the gate driver and control logic, while secondary-side VDD2 (4.5–36 V) supplies the SR driver and error amplifier. The MODE pin enables configurable LLM/CCM operation - unique to ADP1071-1 variants - and soft-start timing is set via external resistor on GATE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Current-mode synchronous flyback controller with integrated isolation and dual MOSFET drivers. |
| Isolation Rating | 5 kVRMS dielectric withstand (1 min), reinforced insulation per UL/VDE/CQC standards - enables safe high-voltage system separation. |
| Switching Frequency | 50 kHz to 600 kHz, programmable via RT pin resistor - supports optimized efficiency vs. size trade-offs in isolated converters. |
| Feedback Accuracy | ±1.25% over −40°C to +125°C - ensures stable output regulation across industrial temperature range without external trimming. |
| Duty Cycle Limit | 84% maximum - prevents transformer saturation and maintains safe operating area under transient load conditions. |
| Gate Driver Output | Primary-side 1A sink/source capability with 17 ns rise / 15 ns fall time into 2.2 nF - drives medium-power MOSFETs directly without buffer stages. |
| VREG1 Supply Range | 4.7 V to 12.5 V - supports wide primary-side bias options including auxiliary winding or external regulator. |
Pinout & Package
ADP1071-1ACCZ is housed in a 16-lead wide-body SOIC (SOIC_W) package with creepage/clearance ≥7.6 mm and reinforced insulation rating. Pin functions are electrically and physically segregated between primary (AGND1, VREG1, GATE, EN, CS, MODE, RT, SYNC, SS2) and secondary (AGND2, VDD2, VREG2, FB, COMP, OVP, SR) sides to maintain isolation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE (Pin 1) | Primary-side MOSFET driver output | Drives high-side switch with 1A peak current; resistor to AGND1 sets open-loop soft-start timing. |
| AGND1 (Pin 2) | Primary-side analog ground reference | Return path for VREG1, EN, CS, MODE, RT, SYNC, SS2 - must be separated from AGND2 by isolation barrier. |
| VREG1 (Pin 3) | Regulated 8V LDO output | Powers internal logic and gate driver; requires ≥1 µF capacitor to AGND1 for stability. |
| MODE (Pin 4) | Light-load mode configuration | ADP1071-1 only; selects LLM threshold or forces CCM via resistor or logic level - enables efficiency optimization at partial load. |
| EN (Pin 5) | Precision enable input | 1.2 V threshold with 3 µA hysteresis current - provides accurate UVLO-controlled startup and shutdown sequencing. |
| CS (Pin 6) | Primary current sense input | Monitors MOSFET source current via external resistor; includes 150 ns leading-edge blanking to reject switching noise. |
| RT (Pin 7) | Oscillator timing resistor connection | Sets switching frequency from 50–600 kHz; tolerance directly impacts fS accuracy (±10% typical). |
| SYNC (Pin 8) | Frequency synchronization input | Accepts external clock (100–600 kHz) to align switching with system master clock - reduces EMI in multi-rail systems. |
| SS2 (Pin 9) | Secondary-side soft-start control | Controls ramp rate of secondary-side regulation loop during startup - prevents output overshoot and inrush stress. |
| FB (Pin 10) | Secondary-side feedback input | Connects to opto-isolator or resistive divider; senses regulated output voltage with ±1.25% accuracy over full temp range. |
| COMP (Pin 11) | Error amplifier output | Drives external compensation network; transconductance = 250 µS, output clamped between 0.7 V and 2.52 V. |
| OVP (Pin 12) | Output overvoltage protection input | Triggers hiccup-mode shutdown if sensed voltage exceeds 1.36 V ±36 mV - protects downstream loads from fault conditions. |
| SR (Pin 13) | Secondary-side synchronous rectifier driver | 1A peak drive into 2.2 nF with 13 ns rise/10 ns fall - enables high-efficiency synchronous rectification with <500 ns minimum on-time. |
| VREG2 (Pin 14) | Secondary-side regulated LDO output | Supplies error amplifier and SR driver; requires ≥1 µF capacitor to AGND2; operates from VDD2 (4.5–36 V). |
| VDD2 (Pin 15) | Secondary-side supply input | Bias source for secondary circuitry; supports up to 36 V - accommodates wide-range auxiliary windings or local regulators. |
| AGND2 (Pin 16) | Secondary-side analog ground reference | Return path for VDD2, VREG2, FB, COMP, OVP, SR - galvanically isolated from AGND1 to maintain safety barrier. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated iCoupler® isolation | Eliminates optocouplers and signal transformers - reduces BOM count, improves reliability, and simplifies layout in isolated flyback designs. |
| Programmable LLM/CCM mode | Enables >90% efficiency at light loads (LLM) or low-noise operation at full load (CCM) - selectable via MODE pin resistor network. |
| Dual independent MOSFET drivers | 1A primary GATE + 1A secondary SR drivers - support discrete MOSFETs without external gate drivers, reducing footprint and cost. |
| Comprehensive protection suite | Includes short-circuit, output overvoltage (OVP), overtemperature (OTP), input overcurrent (OCP), and precision UVLO - ensures robust field operation. |
| Wide input supply range | VREG1: 4.7–12.5 V; VDD2: 4.5–36 V - accommodates diverse bias sources including auxiliary windings, buck regulators, or PoE-derived rails. |
Applications
| Telecom Power Supplies | Industrial Isolated DC-DC Converters |
|---|---|
|
Use Scenario: 48 V input telecom brick supplying 12 V/3.3 V outputs for baseband processing and RF modules. IC Role / Device Role / Timing Role: Primary-side flyback controller with integrated isolation and synchronous rectification - manages power transfer and regulation across safety barrier. Use Value: Enables 5 kVRMS reinforced insulation compliance and >92% efficiency at full load without external isolators or gate drivers. |
Use Scenario: DIN-rail mounted 24 V input power module delivering isolated 5 V/24 V outputs for PLC I/O and sensor interfaces. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller with programmable soft-start and hiccup-mode fault recovery - ensures reliable cold-start and fault containment. Use Value: Supports −40°C to +125°C operation with ±1.25% feedback accuracy, eliminating need for external calibration in harsh environments. |
| PoE Powered Devices | Enterprise Networking Equipment |
|
Use Scenario: IEEE 802.3at/af compliant powered device (PD) extracting up to 25.5 W from PoE switch, converting to 5 V/3.3 V rails. IC Role / Device Role / Timing Role: High-efficiency isolated flyback controller with precharged-load soft-start - handles variable input voltage (37–57 V) and dynamic load steps. Use Value: Integrated 1A SR driver and 50–600 kHz frequency programming allow optimal magnetics selection and EMI filtering for compact PD designs. |
Use Scenario: 1U rack-mounted switch requiring multiple isolated 12 V, 5 V, and 3.3 V rails with strict thermal and EMI constraints. IC Role / Device Role / Timing Role: Synchronized flyback controller supporting multi-phase operation via SYNC pin - enables interleaved conversion for lower ripple and better thermal distribution. Use Value: Frequency synchronization (100–600 kHz) and 84% duty cycle clamp reduce conducted emissions and prevent transformer saturation during burst-mode operation. |
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 optocoupler or digital isolator; no secondary-side SR driver. | Lower integration; suitable for cost-sensitive designs where external isolation is acceptable. | Choose UCC28911DR when board space is less constrained and isolation component sourcing is flexible. |
| LT3748EMSE#TRPBF | Uses transformer-coupled feedback instead of integrated isolator; no MODE pin for LLM/CCM selection. | Targeted at high-reliability aerospace/industrial use with proven magnetic feedback architecture. | Choose LT3748EMSE#TRPBF when legacy transformer-feedback design practices or long-term obsolescence resilience are priorities. |
Compared with UCC28911DR and LT3748EMSE#TRPBF, the ADP1071-1ACCZ delivers higher integration through on-chip iCoupler isolation and dual MOSFET drivers, reducing external component count by ≥4 and enabling smaller, more reliable isolated power stages - especially valuable in space-constrained telecom and networking equipment.
Availability
ADP1071-1ACCZ is available at Aetrix Electronics and suitable for telecom power supplies, industrial isolated DC-DC converters, and PoE-powered devices requiring stable component supply, long-lifecycle support, and certified reinforced isolation.
Supply support for ADP1071-1ACCZ 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 industrial, automotive, communications, and healthcare markets.
The ADP1071-1ACCZ belongs to Analog Devices' isolated power controller product line, engineered specifically for high-efficiency, low-component-count isolated flyback converters in space- and reliability-critical applications.
FAQ
What is the isolation voltage rating of the ADP1071-1ACCZ?
The ADP1071-1ACCZ features 5 kVRMS rated dielectric isolation (1 minute test) in its SOIC_W package, certified to UL 1577, VDE V 0884-10, and CQC GB4943.1-2011 standards. This reinforced insulation rating supports working voltages up to 1131 VPEAK for unipolar DC waveforms with 50-year lifetime assurance - making it suitable for telecom and industrial applications requiring stringent safety compliance.
How does the MODE pin function on the ADP1071-1ACCZ?
The MODE pin on the ADP1071-1ACCZ enables configurable light-load operation: connecting it to AGND1 forces continuous conduction mode (CCM); pulling it high (>2.5 V) enables light-load mode (LLM); or using a resistor to AGND1 sets a precise LLM threshold current. This feature is exclusive to ADP1071-1 variants like ADP1071-1ACCZ and allows dynamic efficiency optimization across load ranges without changing external components.
Can the ADP1071-1ACCZ synchronize to an external clock?
Yes, the ADP1071-1ACCZ supports frequency synchronization via its SYNC pin, accepting external clock signals from 100 kHz to 600 kHz. The device locks within 7 cycles and tolerates input pulses as narrow as 100 ns. This capability allows EMI reduction in multi-rail systems and precise timing alignment with host processors or other power stages - a key advantage over non-synchronizable flyback controllers.
What protection features are integrated into the ADP1071-1ACCZ?
The ADP1071-1ACCZ integrates short-circuit protection, output overvoltage (OVP), overtemperature (OTP), cycle-by-cycle input overcurrent (OCP), and precision enable UVLO with hysteresis. Each triggers hiccup-mode shutdown with defined recovery times (e.g., 200 ms for OVP, 40 ms for OCP), ensuring robust fault handling without latch-up - critical for unattended industrial and telecom deployments where reliability is paramount.
What is the maximum duty cycle limit of the ADP1071-1ACCZ?
The ADP1071-1ACCZ enforces a maximum duty cycle limit of 84%, implemented in hardware to prevent transformer saturation and ensure safe operation under transient overload or startup conditions. This hard-clamp operates independently of loop compensation and remains active even during soft-start or fault recovery - providing deterministic boundary control that simplifies magnetics design and improves system robustness.
ADP1071-1ACCZ 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 ~ 12.5V
- Current - Supply:
- 16.6 mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LGA (8x4)
ADP1071-1ACCZ FAQ
1.How can I place an order for ADP1071-1ACCZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1071-1ACCZ 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 ADP1071-1ACCZ reliable?
The price and inventory of ADP1071-1ACCZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1071-1ACCZ is usually 5 days.
3.What payment methods are accepted for ADP1071-1ACCZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1071-1ACCZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1071-1ACCZ?
ADP1071-1ACCZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1071-1ACCZ 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 ADP1071-1ACCZ?
For technical support, including ADP1071-1ACCZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1071-1ACCZ requirements.
6.How does Aetrix verify that ADP1071-1ACCZ is sourced from the original manufacturer or authorized distributors?
All ADP1071-1ACCZ 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 ADP1071-1ACCZ meets industry standards.
7.What is the process for return or replacement of ADP1071-1ACCZ?
All ADP1071-1ACCZ units undergo pre-shipment inspection (PSI). If there is an issue with ADP1071-1ACCZ, 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 ADP1071-1ACCZ part is unused and in its original packaging.
Return procedure for ADP1071-1ACCZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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