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Analog Devices Inc. ADP1071-1ACCZ-R7
- Part No.:
- ADP1071-1ACCZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-TFLGA Exposed Pad
- Datasheet:
-
ADP1071-1ACCZ-R7.pdf
- Description:
- ISOLATED FLYBACK CONTROLLER W/LI
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
ADP1071-1ACCZ-R7 from Analog Devices is a current-mode isolated synchronous flyback controller with integrated iCoupler® isolation, 5 kVRMS dielectric rating in SOIC_W package, programmable 50–600 kHz switching frequency, and dual 1 A MOSFET drivers (primary GATE + secondary SR). It enables high-efficiency, compact isolated DC/DC conversion in telecom and industrial power supplies.
For engineers reviewing the ADP1071-1ACCZ-R7 datasheet, ADP1071-1ACCZ-R7 pinout, ADP1071-1ACCZ-R7 application, or ADP1071-1ACCZ-R7 equivalent, key selection criteria include its LLM/CCM mode selectability via MODE pin, 84% max duty cycle, ±1.25% feedback accuracy over −40°C to +125°C, integrated error amplifier, and reinforced insulation compliance for safety-critical designs.
Technical Context
The ADP1071-1ACCZ-R7 implements fixed-frequency current-mode PWM control with programmable slope compensation and cycle-by-cycle input overcurrent protection. Its primary-side VREG1 LDO (4.7–12.5 V) powers the gate driver, while secondary-side VDD2 (4.5–36 V) supplies the synchronous rectifier driver.
Isolation is achieved via on-chip iCoupler® technology-eliminating external optocouplers-and supports bidirectional signal transfer across the barrier, including COMP feedback, OVP, and SYNC signals. The device uses precision enable with 1.2 V threshold and 3 µA hysteresis current for reliable startup control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Synchronous flyback with primary-side PWM and secondary-side SR control |
| Switching Frequency | 50–600 kHz, set by RT resistor; enables optimization of magnetics size vs. efficiency |
| Isolation Rating | 5 kVRMS (1 min), SOIC_W package; meets UL 1577, VDE 0884-10, CQC GB4943.1-2011 |
| Feedback Accuracy | ±1.25% over −40°C to +125°C; ensures stable output regulation across industrial temperature range |
| Max Duty Cycle | 84%; limits transformer reset time and prevents core saturation under high VIN conditions |
| GATE Driver Output | 8 V typical high-level drive, 1 A peak sink/source; directly drives 2.2 nF gate capacitance with 15–17 ns rise/fall times |
| SR Driver Output | 5 V typical high-level drive, 1 A peak sink/source; enables low-loss synchronous rectification at up to 600 kHz |
| Protection Features | Short-circuit, output overvoltage (OVP), overtemperature (155°C shutdown), and input overcurrent with 120 mV CS threshold |
Pinout & Package
ADP1071-1ACCZ-R7 is housed in a 16-lead wide-body SOIC (RW-16) package with creepage/clearance ≥7.6 mm and reinforced insulation. Pin 1 is GATE; Pin 2 is AGND1; Pin 3 is VREG1; Pin 4 is MODE (LLM configuration); Pin 5 is EN; Pin 6 is CS; Pin 7 is RT; Pin 8 is GND2; Pin 9 is VDD2; Pin 10 is SR; Pin 11 is FB; Pin 12 is COMP; Pin 13 is OVP; Pin 14 is SS2; Pin 15 is SYNC; Pin 16 is AGND2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE (Pin 1) | Primary-side MOSFET gate driver output | Drives high-side switch with 1 A peak current; resistor to AGND1 sets soft-start timing |
| MODE (Pin 4) | Light Load Mode configuration input | Selects LLM or forced CCM; resistor-to-ground sets LLM threshold (5.5–7.5 µA source) |
| EN (Pin 5) | Precision enable with hysteresis | 1.2 V threshold with 3 µA hysteresis current; enables clean start-up and UVLO lockout |
| CS (Pin 6) | Primary current sense input | 120 mV overcurrent threshold; includes 150 ns leading-edge blanking to reject switching noise |
| RT (Pin 7) | Oscillator timing resistor connection | Resistor value sets fSW from 50–600 kHz; tolerance directly impacts frequency accuracy |
| VDD2 (Pin 9) | Secondary-side supply input | 4.5–36 V input; powers SR driver and secondary-side circuitry; includes 3.55 V UVLO |
| SR (Pin 10) | Synchronous rectifier gate driver output | Drives secondary-side MOSFET with 1 A peak; 52 ns dead time after GATE fall prevents shoot-through |
| FB (Pin 11) | Output voltage feedback input | Connects to secondary-side error amp output via iCoupler; ±1.25% accuracy enables tight regulation |
| COMP (Pin 12) | Compensation node for loop stability | Internal transconductance amplifier (250 µS typ); clamp limits output to 0.7–2.52 V for robust transient response |
| OVP (Pin 13) | Output overvoltage protection input | 1.36 V threshold with 36 mV hysteresis; triggers hiccup mode after 200 ms fault duration |
| SS2 (Pin 14) | Secondary-side soft-start capacitor | 20 µA internal current source charges external cap; controls secondary-side ramp-up during startup |
| SYNC (Pin 15) | Frequency synchronization input | Accepts 100–600 kHz external clock; locks phase within 7 cycles; supports multi-phase systems |
Key Features
| Feature | Design Value |
|---|---|
| Integrated iCoupler® isolation | Eliminates external optocouplers and signal transformers; reduces BOM count and improves reliability in isolated flyback designs |
| Programmable LLM/CCM operation | MODE pin enables light-load efficiency optimization (ADP1071-1 only); avoids audible noise and improves <10% load efficiency |
| Dual 1 A MOSFET drivers | Simultaneous primary GATE and secondary SR drive eliminates need for discrete gate drivers and reduces layout complexity |
| 50–600 kHz programmable frequency | RT resistor selection allows trade-off between transformer size, EMI filtering, and conduction losses across wide input ranges |
| Reinforced insulation certification | UL 1577, VDE 0884-10, CQC GB4943.1-2011 compliant; supports 565 VPEAK working voltage for 50-year lifetime |
| Comprehensive protection suite | Includes OCP (120 mV CS), OVP (1.36 V FB-derived), OTP (155°C), and soft-stop recovery-reducing system-level fault-handling overhead |
Applications
| Telecom Power Supply | Industrial Isolated DC/DC |
|---|---|
Use Scenario: 48 V input isolated DC/DC converter powering baseband processing units in small cell radio units. IC Role / Device Role / Timing Role: Primary-side PWM controller and secondary-side synchronous rectifier driver with isolated feedback via iCoupler®. Use Value: Enables >92% efficiency at full load and >85% at 10% load using LLM mode, meeting ETSI EN 300 386 thermal and efficiency requirements. | Use Scenario: DIN-rail mounted 24 V to 5 V/12 V isolated auxiliary supply for PLC I/O modules. IC Role / Device Role / Timing Role: Fixed-frequency current-mode flyback controller with integrated isolation and dual-side gate drive. Use Value: Reduces component count by eliminating optocoupler, TL431, and external gate drivers-cutting bill-of-materials cost by ~35% versus discrete solutions. |
| PoE Powered Device | Enterprise Networking Equipment |
Use Scenario: IEEE 802.3bt Type 4 (90 W) powered device requiring isolated 12 V/5 V rails from PoE midspan input. IC Role / Device Role / Timing Role: Synchronous flyback controller managing primary-side regulation and secondary-side rectification with iCoupler® feedback. Use Value: Supports 600 kHz operation to shrink transformer size while maintaining 90%+ efficiency across 10–100% load, critical for space-constrained PD designs. | Use Scenario: 12 V isolated bias supply for Ethernet PHYs and management controllers in enterprise switches. IC Role / Device Role / Timing Role: Isolated flyback controller delivering tightly regulated outputs with <1.25% feedback accuracy and fast transient response. Use Value: Ensures stable PHY operation under bursty traffic loads; OVP and OTP prevent latch-up during hot-swap events or cable faults. |
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 and TL431; no secondary-side SR driver; 700 V integrated MOSFET | Targeted for low-cost, non-reinforced isolation AC/DC SMPS; lacks iCoupler® and dual-driver architecture | Choose UCC28911DR only if cost sensitivity outweighs isolation reliability and efficiency goals |
| LT3748EMSE#TRPBF | External MOSFET drive only; no integrated SR driver; no iCoupler®; uses transformer-coupled feedback; 105°C max junction temp | Designed for high-voltage industrial flyback with external FETs; lacks secondary-side integration and LLM mode | Choose LT3748EMSE#TRPBF when designing >100 V input flyback with discrete SR control and legacy transformer feedback |
Compared with UCC28911DR and LT3748EMSE#TRPBF, ADP1071-1ACCZ-R7 delivers higher system-level integration (iCoupler®, dual drivers, LLM), tighter regulation (±1.25%), and certified reinforced isolation-reducing design risk and qualification effort for telecom and industrial applications.
Availability
ADP1071-1ACCZ-R7 is available at Aetrix Electronics and suitable for telecom power supplies, industrial isolated DC/DC converters, PoE powered devices, and enterprise networking equipment requiring stable component supply, long-term lifecycle support, and certified safety isolation.
Supply support for ADP1071-1ACCZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The ADP1071 product line delivers isolated flyback controllers with integrated iCoupler® technology to simplify high-efficiency, safety-certified power conversion for telecom, industrial, and networking applications.
FAQ
What is the isolation voltage rating of the ADP1071-1ACCZ-R7?
The ADP1071-1ACCZ-R7 features a 5 kVRMS rated dielectric isolation voltage (1 minute test) in its SOIC_W package, certified to UL 1577, VDE 0884-10, and CQC GB4943.1-2011 standards. This reinforced insulation supports up to 565 VPEAK continuous working voltage for 50-year lifetime in bipolar AC waveforms, making it suitable for safety-critical telecom and industrial applications where galvanic separation is mandatory.
How does the MODE pin function on the ADP1071-1ACCZ-R7?
The MODE pin on the ADP1071-1ACCZ-R7 configures light-load operation: connecting it to AGND1 forces continuous conduction mode (CCM), applying ≥2.5 V enables light-load mode (LLM), and using a resistor to AGND1 sets a precise LLM threshold (5.5–7.5 µA sourced). This feature is exclusive to ADP1071-1 variants and is not present on ADP1071-2. The ADP1071-1ACCZ-R7 leverages this pin to improve efficiency below 20% load while maintaining stable regulation.
Does the ADP1071-1ACCZ-R7 support frequency synchronization?
Yes, the ADP1071-1ACCZ-R7 supports external frequency synchronization via the SYNC pin (Pin 15), accepting input clocks from 100 kHz to 600 kHz. It achieves lock within seven switching cycles and tolerates input pulse widths down to 100 ns. This capability enables noise reduction in multi-rail systems and EMI compliance in dense PCB layouts-critical for enterprise switches and small-cell base stations where multiple ADP1071-1ACCZ-R7 controllers may operate in proximity.
What protection features are integrated into the ADP1071-1ACCZ-R7?
The ADP1071-1ACCZ-R7 integrates short-circuit protection, output overvoltage protection (OVP) with 1.36 V threshold and 200 ms hiccup delay, overtemperature shutdown at 155°C with −15°C hysteresis, and cycle-by-cycle input overcurrent protection triggered at 120 mV on the CS pin. These features operate autonomously without external components, reducing system-level fault-handling complexity and improving field reliability in unattended industrial deployments.
Can the ADP1071-1ACCZ-R7 be used in both high-input-voltage and low-input-voltage flyback designs?
Yes-the ADP1071-1ACCZ-R7 is optimized for high-input-voltage applications (e.g., 48 V telecom, >60 V industrial bus), unlike the ADP1071-2 variant which supports up to 60 V VIN but requires external bias. Its VREG1 supply operates from 4.7 V to 12.5 V and can be derived from an auxiliary winding or external source, enabling flexible startup and operation across wide input ranges without compromising regulation accuracy or isolation integrity.
ADP1071-1ACCZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TFLGA Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-R7 FAQ
1.How can I place an order for ADP1071-1ACCZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1071-1ACCZ-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 ADP1071-1ACCZ-R7 reliable?
The price and inventory of ADP1071-1ACCZ-R7 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-R7 is usually 5 days.
3.What payment methods are accepted for ADP1071-1ACCZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1071-1ACCZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1071-1ACCZ-R7?
ADP1071-1ACCZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1071-1ACCZ-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 ADP1071-1ACCZ-R7?
For technical support, including ADP1071-1ACCZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1071-1ACCZ-R7 requirements.
6.How does Aetrix verify that ADP1071-1ACCZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1071-1ACCZ-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 ADP1071-1ACCZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP1071-1ACCZ-R7?
All ADP1071-1ACCZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1071-1ACCZ-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 ADP1071-1ACCZ-R7 part is unused and in its original packaging.
Return procedure for ADP1071-1ACCZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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