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Analog Devices Inc./Maxim Integrated MAX17693BATC+T
- Part No.:
- MAX17693BATC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17693BATC+T.pdf
- Description:
- IC REG FLYBACK ADJ 1.72A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,394
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Product details
Overview
MAX17693BATC+T from Maxim Integrated is a 4.2V–60V no-opto isolated flyback converter with integrated 76V/245mΩ nMOSFET, fixed-frequency peak current mode control, and primary-side output voltage regulation. It delivers up to 1.4W output power, supports programmable 100kHz–350kHz switching, and enables compact industrial power supplies for PLC I/O modules and IGBT gate drive supplies.
For engineers reviewing the MAX17693BATC+T datasheet, MAX17693BATC+T pinout, MAX17693BATC+T application, or MAX17693BATC+T equivalent, key selection considerations include primary-side sensing architecture, EN/UVLO threshold programmability (1.215V typ), external loop compensation capability, temperature-compensated diode forward-voltage handling, and TDFN-EP 3mm × 3mm package thermal performance (θJA = 41°C/W on multilayer board).
Technical Context
The MAX17693BATC+T implements primary-side sensing via reflected flyback waveform sampling during secondary rectifier conduction-eliminating optocoupler and secondary error amplifier. Its internal error amplifier features external compensation (COMP pin), enabling precise loop tuning for varying transformer parasitics and load dynamics.
It uses fixed-frequency peak current mode control with programmable RT resistor setting, supports frequency synchronization via SYNC/DITHER pin, and integrates temperature compensation for output diode VF drift using TC/VCM pin bias (0.55V at 25°C, +1.85mV/°C). Hiccup-mode overcurrent protection triggers after 16384 cycles with 0.543A typical peak current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 60V - supports wide industrial input rails including 24V, 36V, and 48V systems without pre-regulation. |
| Integrated FET | 76V breakdown, 245mΩ RDS(ON) at 300mA - enables high-efficiency, low-component-count flyback designs up to 1.4W output. |
| Switching Frequency | 100kHz–350kHz (programmable via RT resistor) - balances EMI, transformer size, and efficiency; default 200kHz when RT open. |
| Output Power | Up to 1.4W - suitable for auxiliary supplies in PLC modules, isolated gate drivers, and telecom interface circuitry. |
| Soft-Start Time | Default 5ms (typ), programmable >5ms via SS capacitor - limits inrush current during cold-start in industrial environments. |
| Thermal Protection | 160°C shutdown with 10°C hysteresis - ensures reliability under sustained overload or poor PCB thermal design. |
| Shutdown Current | 2.5µA - minimizes standby power in always-on industrial systems requiring low quiescent consumption. |
Pinout & Package
MAX17693BATC+T is housed in a space-saving 12-pin, 3mm × 3mm TDFN-EP package (package code TD1233+1C) with exposed pad for enhanced thermal dissipation. Junction-to-ambient thermal resistance is 41°C/W on multilayer PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input supply reference | 4.2V–60V input connection; serves as reference for FB divider; requires ≥1µF ceramic bypass to GND. |
| 2 GND | Primary-side ground | Reference node for all internal circuits; must connect to primary ground plane with low-inductance path. |
| 3 VCC | LDO output | 5.77V regulated supply for internal logic; requires 2.2µF ceramic cap to GND placed adjacent to pin. |
| 4 SYNC/DITHER | Frequency control interface | Configurable for spread-spectrum dithering (±4%–12%) or external clock sync (1.10–1.32× fSW). |
| 5 RT | Frequency programming | Resistor-to-GND sets fSW; RRT = 107/fSWRT (kΩ); open = 200kHz default. |
| 6 TC/VCM | Temperature compensation & common-mode setting | Programs diode VF tempco (−1 to −2mV/°C) and selects internal bias range; 0.55V @ 25°C, +1.85mV/°C. |
| 7 SS | Soft-start timing | Capacitor-to-GND extends soft-start beyond 5ms; CSS (nF) = 5 × tSS (ms). |
| 8 SET | Feedback reference node | 1V regulated input; current through RSET mirrors RFB current for primary-side output regulation. |
| 9 COMP | Error amplifier output | External compensation network connects here (MAX17693B only); enables custom loop stability for varied transformers. |
| 10 EN/UVLO | Enable & undervoltage lockout | 1.215V rising threshold; resistor divider from VIN sets turn-on voltage; 0.8V true shutdown threshold. |
| 11 FB | Reflected voltage sense | Samples LX waveform during secondary conduction; used with RFB to derive output voltage without optocoupler. |
| 12 LX | Switching node | Drain of integrated nMOSFET; connects directly to primary winding of flyback transformer. |
Key Features
| Feature | Design Value |
|---|---|
| No-opto primary-side regulation | Eliminates optocoupler and secondary error amplifier, reducing BOM count and saving ≥20% PCB area vs. traditional flyback. |
| External loop compensation (COMP) | Enables precise bandwidth/phase margin tuning for diverse transformer designs and load transient requirements. |
| Programmable EN/UVLO threshold | Allows accurate startup/shutdown control across wide input ranges-critical for brown-out resilience in industrial 24V/48V systems. |
| Output diode VF temperature compensation | Compensates for diode forward voltage drift over −40°C to +125°C ambient, improving output regulation accuracy across temperature. |
| Hiccup-mode overcurrent protection | 16384-cycle timeout prevents thermal runaway during sustained short-circuit while allowing automatic recovery. |
| Frequency dithering & sync | Reduces EMI peak emissions via ±4–12% spread spectrum; external sync avoids beat frequencies in multi-converter systems. |
Applications
| PLC I/O Module Power | IGBT Gate Drive Supply |
|---|---|
|
Use Scenario: Isolated 15V/200mA auxiliary supply powering digital I/O channel isolators and analog front-end circuitry in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary-side regulated flyback controller providing galvanically isolated DC output without optocoupler feedback. Use Value: Reduces component count by 3–4 parts per channel and shrinks power stage footprint by 20%, enabling higher I/O density in DIN-rail enclosures. |
Use Scenario: Compact 15V/300mA isolated supply for driving high-side IGBT gates in motor drives and inverters operating from 36V–48V bus. IC Role / Device Role / Timing Role: Self-contained flyback controller delivering tightly regulated gate bias with fast transient response and hiccup protection. Use Value: Enables direct integration into gate driver PCBs without external feedback components, improving noise immunity and layout simplicity. |
| Industrial Sensor Interface | Telecom Line Card Bias |
|
Use Scenario: 5V/250mA isolated supply powering precision ADCs, signal conditioners, and RS-485 transceivers in field-mounted sensors. IC Role / Device Role / Timing Role: No-opto flyback regulator maintaining ±3% output accuracy over −40°C to +85°C ambient with minimal external parts. Use Value: Eliminates optocoupler aging effects and improves long-term calibration stability in unattended remote deployments. |
Use Scenario: 12V/100mA isolated bias rail for supervisory ICs and hot-swap controllers on telecom line cards powered from -48V DC distribution. IC Role / Device Role / Timing Role: Wide-input flyback controller supporting negative input via external polarity inversion, delivering stable output despite input ripple. Use Value: Simplifies redundant power architecture by removing need for separate isolated DC-DC modules, lowering cost per line card. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17693AATC+T | Internally compensated; lacks COMP pin; includes OVI pin for input overvoltage protection. | Better suited for cost-sensitive, fixed-design applications where loop tuning isn't required and OVI is needed. | Select MAX17693AATC+T if external compensation isn't needed and input overvoltage clamping is mandatory. |
| UCC28911DR | Fixed 50kHz operation; no frequency programming; no external sync/dither; no TC/VCM temperature compensation. | Targeted at low-cost, low-power (<0.5W) AC/DC adapters-not optimized for wide-input industrial DC-DC. | Choose UCC28911DR only for simple, low-EMI, low-power applications where programmability and temperature compensation are unnecessary. |
Compared with MAX17693AATC+T, the MAX17693BATC+T trades OVI protection for external loop flexibility-enabling robust regulation across variable transformer designs. Versus UCC28911DR, it offers 2× wider input range, 7× higher max frequency, and active temperature compensation-making it suitable for demanding industrial isolation tasks where MAX17693BATC+T's full feature set is leveraged.
Availability
MAX17693BATC+T is available at Aetrix Electronics and suitable for PLC I/O modules, IGBT gate drive supplies, and industrial sensor interfaces requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17693BATC+T 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications, emphasizing integration, reliability, and power efficiency.
The MAX17693B belongs to Maxim's Rainier family of isolated power devices-engineered specifically to simplify and shrink isolated DC-DC conversion in harsh industrial environments through no-opto regulation and robust protection features.
FAQ
What is the key functional difference between MAX17693BATC+T and MAX17693AATC+T?
The MAX17693BATC+T provides external loop compensation via the COMP pin, enabling custom stability tuning for diverse transformer designs, while the MAX17693AATC+T uses internal compensation and adds an OVI pin for input overvoltage protection. The MAX17693BATC+T is selected when loop optimization is critical and OVI is not required-making MAX17693BATC+T ideal for flexible, high-performance industrial flyback implementations where MAX17693BATC+T's COMP pin enables precise transient response tailoring.
Does MAX17693BATC+T require an optocoupler for output regulation?
No, the MAX17693BATC+T uses primary-side sensing to sample the reflected flyback voltage at the LX pin during secondary diode conduction, eliminating the need for an optocoupler or secondary-side error amplifier. This architecture reduces component count, improves reliability, and saves PCB space-confirmed in the MAX17693BATC+T datasheet's "No-Opto Flyback Operation" section, where MAX17693BATC+T achieves ±3% output regulation accuracy without optical feedback.
How is the switching frequency programmed on MAX17693BATC+T?
The switching frequency of MAX17693BATC+T is set by connecting a resistor RRT from the RT pin to GND, using RRT (kΩ) = 107 / fSWRT (kHz). Leaving RT open defaults to 200kHz. Frequency accuracy is ±6% across temperature and line, and MAX17693BATC+T supports synchronization to external clocks between 1.10× and 1.32× the nominal fSW, ensuring predictable timing in multi-converter systems where MAX17693BATC+T operates.
What is the purpose of the TC/VCM pin on MAX17693BATC+T?
The TC/VCM pin on MAX17693BATC+T serves dual functions: selecting internal common-mode voltage range and enabling temperature compensation for the output rectifier diode's forward voltage drop. It sources a PTAT current (0.55V bias at 25°C, +1.85mV/°C) into the SET node to offset VF drift-improving output regulation stability across −40°C to +125°C. This feature is unique to MAX17693BATC+T among Rainier-series variants and is essential for precision industrial supplies where MAX17693BATC+T's thermal behavior directly impacts output accuracy.
What protection features does MAX17693BATC+T include?
MAX17693BATC+T integrates hiccup-mode overcurrent protection (16384-cycle timeout), thermal shutdown at 160°C (10°C hysteresis), programmable EN/UVLO (1.215V turn-on), and optional frequency foldback for light-load efficiency. Unlike the MAX17693A variant, it omits OVI protection-but retains all core fault responses critical for industrial reliability. These protections ensure safe operation during startup, overload, and ambient extremes-validated in MAX17693BATC+T's absolute maximum ratings and electrical characteristics tables.
MAX17693BATC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.2V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.215V
- Voltage - Output (Max):
- 42.6V
- Current - Output:
- 1.72A
- Frequency - Switching:
- 100kHz ~ 350kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX17693BATC+T FAQ
1.How can I place an order for MAX17693BATC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17693BATC+T 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 MAX17693BATC+T reliable?
The price and inventory of MAX17693BATC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17693BATC+T is usually 5 days.
3.What payment methods are accepted for MAX17693BATC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17693BATC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17693BATC+T?
MAX17693BATC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17693BATC+T 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 MAX17693BATC+T?
For technical support, including MAX17693BATC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17693BATC+T requirements.
6.How does Aetrix verify that MAX17693BATC+T is sourced from the original manufacturer or authorized distributors?
All MAX17693BATC+T 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 MAX17693BATC+T meets industry standards.
7.What is the process for return or replacement of MAX17693BATC+T?
All MAX17693BATC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17693BATC+T, 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 MAX17693BATC+T part is unused and in its original packaging.
Return procedure for MAX17693BATC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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