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Analog Devices Inc. ADP1071-1ARWZ
- Part No.:
- ADP1071-1ARWZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADP1071-1ARWZ.pdf
- Description:
- ISOLATED FLYBACK CONTROLLER W/LI
- Quantity:
- Payment:
- Shipping:
Inventory:2,008
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Product details
Overview
ADP1071-1ARWZ from Analog Devices is a current-mode isolated synchronous flyback controller with integrated iCoupler® isolation and dual MOSFET drivers, supporting programmable LLM/CCM operation, 50–600 kHz switching, and 5 kVRMS dielectric isolation in SOIC_W package - used in high-input-voltage isolated DC-DC supplies for telecom and industrial systems.
For engineers reviewing the ADP1071-1ARWZ datasheet, ADP1071-1ARWZ pinout, ADP1071-1ARWZ application, or ADP1071-1ARWZ equivalent, key selection criteria include primary-side VIN capability (up to 12.5 V on VREG1), secondary-side VDD2 range (4.5–36 V), integrated 1 A gate/SR drivers, ±0.85% feedback accuracy, and iCoupler-based isolation eliminating optocouplers and transformers.
Technical Context
The ADP1071-1ARWZ implements fixed-frequency current-mode PWM control with programmable slope compensation and cycle-by-cycle input overcurrent protection. Its iCoupler technology enables galvanic isolation between primary and secondary sides without external components, transmitting COMP, FB, and SR control signals across the barrier with 600 ns typical delay.
It features dual independent power domains: primary-side VREG1 (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 light-load mode (LLM) or forced CCM - distinguishing it from the ADP1071-2 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Synchronous flyback with primary/secondary MOSFET drivers - eliminates diode rectifier losses at heavy loads. |
| Switching Frequency | 50–600 kHz, set via RT resistor - supports compact magnetics and EMI optimization. |
| Isolation Rating | 5 kVRMS (1 min), SOIC_W package - meets reinforced insulation requirements per UL 1577 and VDE 0884-10. |
| Feedback Accuracy | ±0.85% at −40°C to +85°C - enables tight output voltage regulation without external trimming. |
| GATE Driver Output | 8 V typical high-level drive, 1 A peak sink/source - directly drives standard N-channel MOSFETs without external buffers. |
| SR Driver Output | 5 V typical high-level drive, 1 A peak sink/source - synchronously controls secondary-side rectification with 10–13 ns rise/fall times. |
| Duty Cycle Limit | 84% max - prevents transformer saturation and ensures safe operation under transient overload. |
Pinout & Package
ADP1071-1ARWZ is housed in a 16-lead wide-body SOIC (RW-16) package with creepage/clearance ≥7.6 mm and 5 kVRMS isolation rating. Pin 1 is GATE; pins are arranged with primary-side (AGND1, VREG1, EN, CS, MODE, RT, SYNC, SS2) and secondary-side (AGND2, VDD2, VREG2, FB, COMP, OVP, SR) terminals physically segregated to maintain isolation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE (Pin 1) | Primary-side MOSFET driver output | Drives external high-side N-MOSFET; resistor to AGND1 sets soft-start time; 8 V clamp limits gate voltage. |
| AGND1 (Pin 2) | Primary-side analog ground | Reference for VREG1, EN, CS, MODE, RT, SYNC, SS2 - must be separated from power ground to avoid noise coupling. |
| VREG1 (Pin 3) | Primary-side 8 V LDO output | Powers internal logic and GATE driver; requires ≥1 µF capacitor to AGND1; UVLO threshold 4.0–4.7 V. |
| MODE (Pin 4) | Light-load mode configuration | ADP1071-1 only; resistor-to-ground sets LLM threshold; logic-high forces LLM, grounded forces CCM. |
| EN (Pin 5) | Precision enable input | 1.14–1.26 V threshold with 3 µA hysteresis current - enables precise system-level power sequencing. |
| CS (Pin 6) | Primary current sense input | 120 mV overcurrent threshold with 150 ns blanking - senses MOSFET source current for cycle-by-cycle protection. |
| RT (Pin 7) | Oscillator timing resistor | Resistor value sets frequency from 50–600 kHz; tolerance impacts ±10% frequency accuracy. |
| SYNC (Pin 8) | Frequency synchronization input | Accepts 100 ns–600 kHz external clock; locks switching to master source for EMI reduction. |
| SS2 (Pin 9) | Secondary soft-start control | Current source (20 µA) charges external capacitor - controls secondary-side ramp-up to prevent inrush. |
| FB (Pin 10) | Secondary-side feedback input | Connects to optocoupler-equivalent divider; ±0.85% accuracy enables <1% output regulation error. |
| COMP (Pin 11) | Error amplifier output | Transconductance 230–270 µS; clamped 0.7–2.52 V - interfaces with iCoupler to transmit correction signal. |
| OVP (Pin 12) | Output overvoltage protection | 1.3–1.42 V threshold with 36 mV hysteresis - triggers hiccup mode after 200 ms fault duration. |
| SR (Pin 13) | Secondary-side synchronous rectifier driver | Drives N-MOSFET on secondary; 462 ns minimum on-time prevents shoot-through at 300 kHz. |
| VREG2 (Pin 14) | Secondary-side 5 V LDO output | Powers FB/COMP/OVP circuitry; requires ≥1 µF capacitor to AGND2; UVLO 3.0–3.55 V. |
| VDD2 (Pin 15) | Secondary-side supply input | 4.5–36 V input range; powers VREG2 and SR driver; quiescent current 5.3–12.1 mA depending on load/frequency. |
| AGND2 (Pin 16) | Secondary-side analog ground | Reference for VDD2, VREG2, FB, COMP, OVP, SR - must be isolated from AGND1 by PCB layout and spacing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated iCoupler isolation | Eliminates optocouplers and signal transformers - reduces BOM count, improves reliability, and enables compact layout. |
| Programmable LLM/CCM mode | MODE pin selects light-load discontinuous conduction or forced continuous conduction - optimizes efficiency across load range. |
| Dual 1 A MOSFET drivers | Independent primary GATE and secondary SR drivers - support synchronous rectification without external gate drivers. |
| 5 kVRMS reinforced isolation | SOIC_W package certified to UL 1577 and VDE 0884-10 - satisfies safety requirements for telecom and industrial AC/DC systems. |
| Comprehensive protection suite | Includes OCP, OVP, OTP, UVLO with hysteresis, and soft-stop - enables robust operation in unattended equipment. |
Applications
| Telecom Power Supply | Industrial Isolated DC-DC |
|---|---|
|
Use Scenario: 48 V input isolated DC-DC conversion for base station RF modules requiring low-noise, high-efficiency power. IC Role / Device Role / Timing Role: Primary-side flyback controller with iCoupler-isolated feedback - regulates output while maintaining safety isolation between chassis and RF circuitry. Use Value: 5 kVRMS isolation and ±0.85% feedback accuracy ensure stable 3.3 V/5 V rails under variable load and temperature. |
Use Scenario: DIN-rail mounted 24 V to 12 V isolated converter powering PLC I/O modules in harsh factory environments. IC Role / Device Role / Timing Role: Synchronous flyback controller managing primary switching and secondary rectification timing - replaces discrete optocoupler + driver solutions. Use Value: Integrated 1 A SR driver and programmable soft-start reduce inrush stress and improve startup reliability across wide temperature range. |
| PoE Powered Device | Enterprise Networking Equipment |
|
Use Scenario: IEEE 802.3af/at-compliant powered device (PD) converting PoE input (37–57 V) to isolated 5 V/3.3 V rails. IC Role / Device Role / Timing Role: High-VIN capable flyback controller with LLM mode - maintains efficiency at light loads typical of standby network interfaces. Use Value: MODE pin-configurable LLM extends battery backup runtime and reduces no-load power consumption below 100 mW. |
Use Scenario: Embedded power supply in enterprise switches/routers delivering isolated auxiliary rails for management ASICs and PHYs. IC Role / Device Role / Timing Role: Isolated controller with frequency sync input - enables multi-rail synchronization to suppress beat frequencies in dense board layouts. Use Value: SYNC pin accepts external clock up to 600 kHz - simplifies EMI compliance testing and reduces conducted emissions peaks. |
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 driver; 700 V integrated MOSFET. | Targeted at lower-cost, non-reinforced isolation designs; lacks synchronous rectification control. | Choose UCC28911DR when cost sensitivity outweighs isolation integration and efficiency requirements. |
| LT3748EMSE#TRPBF | Optocoupler-based feedback; no integrated iCoupler; no secondary-side SR driver; 105°C max junction temp. | Designed for high-temp industrial use but requires external gate drivers and isolation components. | Choose LT3748EMSE#TRPBF when operating above 125°C ambient or where Analog Devices' iCoupler certification is not required. |
Compared with UCC28911DR and LT3748EMSE#TRPBF, the ADP1071-1ARWZ delivers higher system-level integration via on-chip iCoupler and dual drivers, reducing component count by ≥4 and enabling tighter output regulation (±0.85%) without external compensation.
Availability
ADP1071-1ARWZ 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 assurance, and certified reinforced isolation.
Supply support for ADP1071-1ARWZ 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 ADP1071-1ARWZ belongs to Analog Devices' isolated power controller product line, designed specifically to replace optocoupler-based flyback controllers in safety-critical, space-constrained, and high-efficiency isolated power applications.
FAQ
What is the maximum input voltage supported by ADP1071-1ARWZ on its primary side?
The ADP1071-1ARWZ does not accept direct high-voltage input on VIN - instead, it operates from a regulated VREG1 supply with a maximum rating of 12.5 V. This VREG1 is typically derived from an auxiliary winding or bias supply. The ADP1071-1ARWZ is intended for high-input-voltage applications where the main DC bus (e.g., 48 V, 37–57 V PoE) is stepped down via transformer, not applied directly to the IC. Its VREG1 UVLO rising threshold is 4.7 V, falling threshold 4.0 V.
Does ADP1071-1ARWZ support synchronous rectification on both primary and secondary sides?
No - the ADP1071-1ARWZ integrates a primary-side GATE driver for the main power MOSFET and a secondary-side SR driver for synchronous rectification on the output winding. It does not drive a synchronous switch on the primary side; the primary switch is controlled by the GATE output, while the secondary-side MOSFET is driven by the SR pin. This architecture enables high-efficiency flyback operation without secondary diode losses.
How is isolation achieved in ADP1071-1ARWZ without external optocouplers?
ADP1071-1ARWZ uses Analog Devices' proprietary iCoupler® technology - monolithic silicon-based isolation using micro-transformers fabricated directly on-chip. This integrates galvanic isolation between primary and secondary signal paths (COMP→FB, FB→COMP, SR control) within the SOIC_W package, rated for 5 kVRMS. No external optocouplers, transformers, or isolation ICs are needed, reducing size, cost, and failure points.
Can ADP1071-1ARWZ be used in place of ADP1071-2ARWZ?
No - ADP1071-1ARWZ and ADP1071-2ARWZ are functionally distinct variants. ADP1071-1ARWZ supports programmable LLM/CCM via the MODE pin and is optimized for high-input-voltage applications with VREG1 supply only. ADP1071-2ARWZ includes a dedicated VIN pin rated up to 60 V and forces CCM operation. They share pinout and package but differ in internal logic, supply architecture, and feature set - substitution requires full schematic and firmware validation.
What safety certifications apply to ADP1071-1ARWZ in the SOIC_W package?
The ADP1071-1ARWZ in SOIC_W package carries pending certifications aligned with UL 1577 (5 kVRMS isolation), VDE 0884-10 (reinforced insulation, VIORM = 849 VPEAK), CSA Component Acceptance Notice 5A, and CQC GB4943.1-2011. It meets reinforced insulation requirements for 1 MOPP (IEC 60601-1) and basic insulation for industrial equipment (IEC 61010-1), with maximum working voltage up to 1131 VPEAK for DC waveforms.
ADP1071-1ARWZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADP1071-1ARWZ FAQ
1.How can I place an order for ADP1071-1ARWZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1071-1ARWZ 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 ADP1071-1ARWZ reliable?
The price and inventory of ADP1071-1ARWZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1071-1ARWZ is usually 5 days.
3.What payment methods are accepted for ADP1071-1ARWZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1071-1ARWZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1071-1ARWZ?
ADP1071-1ARWZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1071-1ARWZ 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 ADP1071-1ARWZ?
For technical support, including ADP1071-1ARWZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1071-1ARWZ requirements.
6.How does Aetrix verify that ADP1071-1ARWZ is sourced from the original manufacturer or authorized distributors?
All ADP1071-1ARWZ 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 ADP1071-1ARWZ meets industry standards.
7.What is the process for return or replacement of ADP1071-1ARWZ?
All ADP1071-1ARWZ units undergo pre-shipment inspection (PSI). If there is an issue with ADP1071-1ARWZ, 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 ADP1071-1ARWZ part is unused and in its original packaging.
Return procedure for ADP1071-1ARWZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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