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Analog Devices Inc./Maxim Integrated MAX17692BATC+T
- Part No.:
- MAX17692BATC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17692BATC+T.pdf
- Description:
- IC REG FLYBACK 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,237
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Product details
Overview
MAX17692BATC+T from Maxim Integrated is a high-efficiency, no-opto isolated flyback converter IC with integrated 76V/205mΩ nMOSFET, fixed-frequency peak-current-mode control, and primary-side output voltage regulation. It operates from 4.2V to 60V input, delivers up to 3.5W isolated output power, supports programmable 100–350kHz switching, and targets space-constrained industrial power supplies requiring optocoupler-free design.
For engineers reviewing the MAX17692BATC+T datasheet, MAX17692BATC+T pinout, MAX17692BATC+T application, or MAX17692BATC+T equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and EMI mitigation features (dithering, sync, hiccup protection), and real-world application constraints for PLC I/O modules, IGBT gate drive supplies, and telecom isolation rails.
Technical Context
The MAX17692BATC+T implements primary-side sensing via reflected flyback waveform sampling during secondary diode conduction-eliminating optocoupler and secondary error amplifier. Its internal 76V nMOSFET switch (205mΩ typical RDS(ON)) enables compact 3.5W isolated DC-DC conversion with no auxiliary winding required for feedback.
It uses fixed-frequency peak-current-mode control with programmable RT-based frequency (100–350kHz), external clock synchronization capability on SYNC/DITHER, ±4%–±12% spread-spectrum dithering, and temperature-compensated output diode forward-voltage correction via TC/VCM pin. The MAX17692B variant provides external loop compensation via COMP pin, unlike the internally compensated MAX17692A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 60V - supports wide-input industrial and telecom rails without pre-regulation. |
| Integrated Switch | 76V, 205mΩ nMOSFET - reduces BOM count and PCB area vs. discrete FET + driver solutions. |
| Switching Frequency | Programmable 100–350kHz (RT resistor) - enables EMI optimization and transformer size trade-offs. |
| Output Power | Up to 3.5W - suitable for isolated gate drives, sensor interfaces, and low-power PLC modules. |
| Soft-Start Time | Default 5ms (SS open); programmable >5ms - limits inrush current into output capacitors at startup. |
| Thermal Protection | Hiccup-mode current limit + 160°C junction shutdown with 10°C hysteresis - ensures robust operation under overload or ambient stress. |
| Shutdown Current | 2.5µA - enables ultra-low-power disable states in battery-backed or energy-sensitive systems. |
Pinout & Package
MAX17692BATC+T is housed in a thermally enhanced 12-pin 3mm × 3mm TDFN-EP package (package code TD1233+1C) with exposed pad tied to primary-side GND for improved thermal dissipation (θJA = 41°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply rail | 4.2–60V input reference; powers internal LDO and sets FB bias point - must connect directly to transformer primary node. |
| GND | Primary-side ground reference | Return path for all internal circuits and exposed pad - requires low-inductance connection to primary ground plane. |
| VCC | LDO-regulated bias supply | 5.77V (typ) output powering internal logic; requires ≥2.2µF ceramic cap close to pin for stability. |
| SYNC/DITHER | Multi-function timing interface | Accepts external clock (1.1–1.32× fSW) or configures ±4–12% spread-spectrum dithering - must tie to GND if unused. |
| RT | Frequency programming node | Resistor-to-GND sets switching frequency (100–350kHz); open-circuit defaults to 200kHz. |
| TC/VCM | Temperature compensation & common-mode setting | Configures diode VF tempco (−1 to −2mV/°C) and internal analog block operating range - latched at power-up. |
| SS | Soft-start ramp control | Capacitor-to-GND extends soft-start beyond default 5ms - controls inrush current slew rate into output capacitance. |
| SET | Feedback reference node | 1.0V (typ) regulated reference; current through RSET mirrors RFB current - critical for output voltage accuracy. |
| COMP | Error amplifier output | External compensation network connects here (MAX17692B only) - enables custom loop response tuning for varied transformers/loads. |
| EN/UVLO | Enable & input UVLO threshold | 1.215V rising threshold enables startup; 1.1V falling threshold disables - resistor divider sets precise turn-on voltage. |
| FB | Primary-side feedback sense | Samples reflected flyback voltage during secondary conduction - eliminates need for optocoupler or auxiliary winding. |
| LX | Switching node | Drain of integrated nMOSFET - connects directly to transformer primary winding - requires low-parasitic layout. |
Key Features
| Feature | Design Value |
|---|---|
| No-opto primary-side regulation | Eliminates optocoupler, secondary error amp, and auxiliary winding - saves ≥20% PCB area and reduces component count. |
| Programmable spread-spectrum dithering | ±4% to ±12% frequency modulation on SYNC/DITHER - lowers EMI peak emissions without filter redesign. |
| External clock synchronization | Syncs internal oscillator to external clock (1.1–1.32× fSW) - prevents beat frequencies in multi-converter systems. |
| Output diode temperature compensation | TC/VCM pin enables −1mV/°C to −2mV/°C VF tracking - maintains output voltage accuracy across −40°C to +125°C ambient. |
| Hiccup-mode overcurrent protection | 16384-cycle timeout before restart - limits average power during sustained short-circuit while preventing thermal runaway. |
| Wide industrial temperature range | −40°C to +125°C ambient (−40°C to +150°C junction) - qualified for harsh environments including factory automation and telecom infrastructure. |
Applications
| PLC Digital I/O Module Supply | IGBT Gate Drive Isolation |
|---|---|
Use Scenario: Isolated 15V/0.2A supply for digital input conditioning and output driver stages in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary-side regulated flyback controller delivering galvanically isolated bias for opto-isolators and level-shifted logic. Use Value: Eliminates optocoupler-based feedback, reducing footprint by 20% and enabling single-layer PCB layout for cost-sensitive I/O modules. |
Use Scenario: Compact 15V/0.3A isolated supply for driving high-side IGBT gates in motor inverters and UPS systems. IC Role / Device Role / Timing Role: Self-contained flyback controller providing reinforced isolation and fast transient response for gate drive bias. Use Value: Integrated 76V FET and primary-side regulation enable <3.5W output in 3mm × 3mm footprint - simplifies thermal design in dense power stacks. |
| Industrial Sensor Interface Rail | Telecom Line Card Bias |
Use Scenario: 5V/0.7A isolated supply powering analog front-ends and ADCs in field-mounted pressure/temperature transmitters. IC Role / Device Role / Timing Role: No-opto flyback regulator maintaining tight output regulation despite wide input (19–30V) and load variation. Use Value: Temperature-compensated SET pin ensures ±1% output accuracy from −40°C to +85°C - critical for precision sensor signal chains. |
Use Scenario: 12V/0.25A isolated bias for hot-swap controllers and management ASICs on telecom line cards with strict EMI limits. IC Role / Device Role / Timing Role: Spread-spectrum dithering and external clock sync enable compliance with EN 55032 Class B conducted emissions. Use Value: Programmable 100–350kHz switching + dithering allows EMI filter optimization without sacrificing efficiency or size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar no-opto isolated flyback converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17692AATC+T | Internally compensated; includes OVI pin for input overvoltage protection; lacks COMP pin. | Better suited for fixed-output designs where loop tuning isn't required and OVI is needed for input surge immunity. | Select MAX17692AATC+T when OVI protection is mandatory and external compensation is unnecessary. |
| UCC28911DR | TI's no-opto flyback controller with 700V integrated MOSFET; fixed 50kHz frequency; no dithering or sync capability. | Targeted at higher-input AC/DC adapters (85–265VAC), not wide-range DC inputs like 4.2–60V. | Choose UCC28911DR only for universal AC input applications - not a drop-in replacement for MAX17692BATC+T's DC-input, dithering, or sync features. |
Compared with MAX17692AATC+T, the MAX17692BATC+T trades OVI protection for external loop tuning flexibility; versus UCC28911DR, it offers wider DC input range, programmable frequency, and EMI-reduction features - making it uniquely suited for industrial DC-fed isolated rails.
Availability
MAX17692BATC+T is available at Aetrix Electronics and suitable for PLC I/O modules, IGBT gate drive supplies, and telecom line card biasing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17692BATC+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX17692B belongs to Maxim's Rainier family of isolated power devices, designed specifically to simplify and shrink isolated DC-DC converters by eliminating optocouplers and enabling primary-side regulation in space- and reliability-constrained applications.
FAQ
What is the key functional difference between MAX17692BATC+T and MAX17692AATC+T?
The MAX17692BATC+T features external loop compensation via the COMP pin and omits the OVI (input overvoltage protection) pin, whereas the MAX17692AATC+T includes OVI but uses internal compensation. This makes MAX17692BATC+T ideal for designs requiring custom loop tuning across varying transformer/line/load conditions, while MAX17692AATC+T suits fixed-output applications needing input surge protection. Both share identical pinout, package, and core regulation architecture.
Can MAX17692BATC+T operate without an external clock or dithering components?
Yes - MAX17692BATC+T operates fully functional with SYNC/DITHER tied to GND, RT left open (default 200kHz), and SS open (default 5ms soft-start). All advanced features - dithering, external sync, programmable soft-start, and frequency tuning - are optional. The device requires only VIN, GND, VCC bypass, FB/RFB, SET/RSET, LX/transformer, and EN/UVLO divider to deliver regulated isolated output.
How does MAX17692BATC+T achieve accurate output regulation without an optocoupler?
MAX17692BATC+T samples the reflected flyback voltage at the LX pin during secondary diode conduction, using an internal differential amplifier to generate a current proportional to the secondary winding voltage. This current flows through RSET, creating a voltage at the SET pin that the internal error amplifier regulates to 1.0V. By sampling near zero secondary current, transformer leakage and diode VF effects are minimized - and TC/VCM enables temperature compensation for residual VF drift.
What is the maximum continuous output power achievable with MAX17692BATC+T?
MAX17692BATC+T delivers up to 3.5W of continuous isolated output power under typical conditions (e.g., 24V input, 5V/0.7A output, 4-layer PCB, +25°C ambient). Actual power depends on transformer design, layout thermal performance, and ambient temperature - derating is required above +70°C ambient due to 1951mW max power dissipation on multilayer board and 160°C thermal shutdown threshold.
Does MAX17692BATC+T support input voltages below 5V?
Yes - MAX17692BATC+T supports input voltages as low as 4.2V, making it suitable for 5V-rail or battery-backed systems (e.g., 4.5V Li-ion nominal). At low VIN, ensure VCC remains ≥4.3V (via internal LDO or auxiliary winding) and verify minimum duty cycle constraints: tON(MIN) = 150ns and tOFF(MIN) = 300ns limit achievable output voltage range and transformer turns ratio selection.
MAX17692BATC+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:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.2V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- 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)
MAX17692BATC+T FAQ
1.How can I place an order for MAX17692BATC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17692BATC+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 MAX17692BATC+T reliable?
The price and inventory of MAX17692BATC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17692BATC+T is usually 5 days.
3.What payment methods are accepted for MAX17692BATC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17692BATC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17692BATC+T?
MAX17692BATC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17692BATC+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 MAX17692BATC+T?
For technical support, including MAX17692BATC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17692BATC+T requirements.
6.How does Aetrix verify that MAX17692BATC+T is sourced from the original manufacturer or authorized distributors?
All MAX17692BATC+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 MAX17692BATC+T meets industry standards.
7.What is the process for return or replacement of MAX17692BATC+T?
All MAX17692BATC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17692BATC+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 MAX17692BATC+T part is unused and in its original packaging.
Return procedure for MAX17692BATC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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