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Analog Devices Inc./Maxim Integrated MAX17692BATC+
- Part No.:
- MAX17692BATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17692BATC+.pdf
- Description:
- IC REG FLYBACK 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
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Product details
Overview
MAX17692BATC+ 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 output power, supports 100–350kHz programmable switching frequency, and targets space-constrained industrial isolated supplies.
For engineers reviewing the MAX17692BATC+ datasheet, MAX17692BATC+ pinout, MAX17692BATC+ application, or MAX17692BATC+ equivalent, key selection considerations include primary-side sensing architecture, EN/UVLO threshold programmability, thermal shutdown at 160°C, -40°C to +125°C operating range, and TDFN-EP 3mm × 3mm package compatibility with high-density PCB layouts.
Technical Context
The MAX17692BATC+ implements a proprietary primary-side sampling algorithm that measures reflected flyback voltage during secondary diode conduction to regulate output without optocoupler or secondary error amplifier. Its internal oscillator uses RT-resistor programming and supports external clock synchronization via SYNC/DITHER pin with 9-cycle detection logic.
It features dual-function TC/VCM pin for temperature compensation of output diode forward voltage (±1.85mV/°C bias) and common-mode voltage selection, plus built-in soft-start (5ms default), frequency dithering (±4% to ±12%), and hiccup-mode overcurrent protection with 16384-cycle timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 60V - enables direct operation from wide industrial bus rails including 24V, 36V, 48V, and 60V systems. |
| Integrated Switch | 76V, 205mΩ nMOSFET - eliminates external high-voltage switch, reduces BOM count, and supports ≤3.5W isolated output power. |
| Switching Frequency | 100kHz to 350kHz (programmable via RT resistor) - balances EMI, transformer size, and efficiency across medium-power designs. |
| EN/UVLO Threshold | 1.215V (rising), 1.1V (falling) - allows precise input turn-on/off control using external resistor divider for system-level sequencing. |
| Thermal Shutdown | 160°C with 10°C hysteresis - protects against sustained overload or poor heatsinking in enclosed industrial environments. |
| Soft-Start Time | 5ms default (adjustable via SS capacitor) - limits inrush current into output capacitors during cold start or hot-swap events. |
| Shutdown Current | 2.5µA - minimizes standby power loss in always-on or low-power wake-up systems. |
Pinout & Package
MAX17692BATC+ is housed in a thermally enhanced 12-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed pad connected to GND for improved thermal dissipation. The package supports JEDEC-standard reflow and achieves θJA = 41°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply reference | Primary-side input rail connection (4.2–60V); referenced by FB circuitry and powers internal LDO bias network. |
| GND | Ground reference | Primary-side ground plane connection; EP must be soldered to GND with thermal vias for thermal performance. |
| VCC | LDO output | 5.77V regulated output powering internal circuitry; requires ≥2.2µF ceramic bypass capacitor placed adjacent to pin. |
| SYNC/DITHER | Frequency control interface | Dual-mode pin: accepts external clock (1.1–1.32× fSWRT) or drives dithering triangle waveform (21µA charge/discharge) for EMI reduction. |
| RT | Oscillator timing | Resistor-to-GND sets nominal switching frequency (100–350kHz); open-circuit defaults to 200kHz. |
| TC/VCM | Temperature & common-mode control | Programs output diode VF temperature compensation (+1.85mV/°C) and selects internal common-mode voltage range (KVCM ≥2.5 or <2.5). |
| SS | Soft-start ramp | Capacitor-to-GND extends soft-start time beyond 5ms; open-circuit yields default 5ms startup ramp. |
| SET | Feedback reference node | Internal 1.0V reference point where RSET connects; sampled voltage regulates output based on reflected flyback waveform. |
| EN/UVLO | Enable & undervoltage lockout | Resistor-divider input enabling precise input turn-on (1.215V) and turn-off (1.1V) thresholds for system sequencing. |
| FB | Primary-side feedback sense | Senses LX node voltage during secondary conduction; used with RFB to derive proportional current for SET regulation. |
| LX | Switching node | Drain of integrated nMOSFET; connects directly to primary winding of flyback transformer; carries high dv/dt switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| No-opto primary-side regulation | Eliminates optocoupler, secondary error amplifier, and auxiliary winding - reduces component count and saves ≥20% PCB area vs. traditional flyback. |
| Programmable frequency dithering | ±4% to ±12% spread-spectrum modulation via SYNC/DITHER pin - lowers peak EMI emissions to meet CISPR-32 Class B requirements. |
| Output diode temperature compensation | Adjustable -1mV/°C to -2mV/°C compensation via TC/VCM pin - maintains output regulation accuracy across -40°C to +125°C ambient. |
| Hiccup-mode overcurrent protection | 16384-cycle timeout before restart - prevents thermal runaway during sustained short-circuit or overload conditions. |
| External clock synchronization | Supports multi-converter systems by locking internal oscillator to external clock (1.1–1.32× fSWRT) - eliminates low-frequency beat interference on shared input bus. |
Applications
| PLC I/O Module Power | IGBT Gate Drive Supply |
|---|---|
Use Scenario: Isolated 15V/0.2A auxiliary supply for digital I/O channel conditioning and level-shifting in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary-side regulated flyback controller providing galvanic isolation between field-side and controller-side circuits. Use Value: Enables compact, optocoupler-free design meeting IEC 61000-4-5 surge immunity and 2.5kV RMS isolation requirements. |
Use Scenario: 15V/0.3A isolated bias supply for half-bridge IGBT drivers in motor inverters and UPS systems. IC Role / Device Role / Timing Role: High-reliability flyback controller delivering stable gate drive voltage under fast transient load steps. Use Value: Maintains tight output regulation (<±3%) despite wide input variation (18–36V DC bus) and junction temperature shifts. |
| Industrial Sensor Interface | Telecom Remote PHY Power |
Use Scenario: 5V/0.7A isolated power for analog sensor signal conditioning and ADC front-end in hazardous-area transmitters. IC Role / Device Role / Timing Role: No-opto flyback converter implementing primary-side sensing to avoid secondary-side component placement constraints. Use Value: Achieves <1% output voltage drift over -40°C to +85°C ambient due to TC/VCM temperature compensation. |
Use Scenario: 12V/0.3A isolated supply for remote PHY devices in distributed cable access architectures (e.g., DOCSIS 4.0 nodes). IC Role / Device Role / Timing Role: EMI-optimized flyback controller synchronized to system master clock to suppress conducted noise on shared power bus. Use Value: Reduces 100–300MHz radiated emissions by >6dB through frequency dithering and synchronous switching. |
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 |
|---|---|---|---|
| UCC28911DR | Fixed 70kHz frequency, no frequency programming or dithering; 700V integrated MOSFET; no TC/VCM temperature compensation. | Targeted at lower-cost, lower-power (<1.5W) AC/DC adapters; lacks precision EN/UVLO and thermal hysteresis. | Select UCC28911DR only for cost-sensitive, non-industrial applications where 70kHz fixed frequency and absence of dithering are acceptable. |
| LT3748EMSE#TRPBF | Supports higher output power (up to 10W), includes adjustable soft-start and slope compensation; no integrated OVI pin or TC/VCM function. | Preferred for high-precision, high-reliability telecom and medical isolated supplies requiring tighter regulation and wider VIN range (4.5–100V). | Choose LT3748EMSE#TRPBF when >3.5W output, 100V input capability, or external slope compensation is required - but expect larger solution size and added components. |
Compared with UCC28911DR and LT3748EMSE#TRPBF, MAX17692BATC+ uniquely balances programmable frequency, integrated temperature compensation, and compact 3mm × 3mm footprint - making it optimal for space-constrained, thermally demanding industrial isolated supplies needing 2–3.5W output.
Availability
MAX17692BATC+ is available at Aetrix Electronics and suitable for PLC I/O modules, IGBT gate drive supplies, industrial sensor interfaces, and telecom remote PHY power requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX17692BATC+ 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 MAX17692BATC+ belongs to Maxim's Rainier family of isolated power devices, designed specifically to simplify and miniaturize primary-side regulated flyback converters for harsh-environment industrial applications.
FAQ
What is the maximum output power supported by the MAX17692BATC+?
The MAX17692BATC+ delivers up to 3.5W of isolated output power under typical conditions (e.g., 24V input, 5V/0.7A output). This limit arises from thermal constraints of the integrated 205mΩ nMOSFET and the 1.72A RMS LX current rating. Actual achievable power depends on transformer design, layout, ambient temperature, and cooling - with derating required above +70°C ambient.
Does the MAX17692BATC+ require an optocoupler for regulation?
No, the MAX17692BATC+ does not require an optocoupler. It uses primary-side sensing to sample the reflected flyback voltage at the LX pin during secondary diode conduction, then regulates output voltage by controlling duty cycle based on the SET pin voltage. This eliminates the optocoupler, secondary-side error amplifier, and associated compensation components.
How is the switching frequency programmed on the MAX17692BATC+?
The switching frequency of the MAX17692BATC+ is set by connecting a resistor (RRT) from the RT pin to GND. The relationship is RRT(kΩ) = 107 / fSWRT(kHz), supporting 100–350kHz. Leaving RT open configures the default 200kHz frequency. Frequency accuracy is ±6% over temperature and line.
What is the purpose of the TC/VCM pin on the MAX17692BATC+?
The TC/VCM pin on the MAX17692BATC+ serves two functions: (1) it programs temperature compensation for the output rectifier diode's forward voltage drop using a +1.85mV/°C PTAT current source, and (2) it selects one of two internal common-mode voltage ranges (KVCM ≥2.5 or <2.5) to optimize analog block operation across input and load conditions.
Can the MAX17692BATC+ synchronize to an external clock?
Yes, the MAX17692BATC+ supports external clock synchronization via the SYNC/DITHER pin. An external clock signal (1.10× to 1.32× the nominal fSWRT) applied to this pin locks the internal oscillator to the external frequency after detecting nine consecutive rising edges, eliminating beat frequencies in multi-converter systems.
MAX17692BATC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- 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+ FAQ
1.How can I place an order for MAX17692BATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17692BATC+ 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+ reliable?
The price and inventory of MAX17692BATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17692BATC+ is usually 5 days.
3.What payment methods are accepted for MAX17692BATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17692BATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17692BATC+?
MAX17692BATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17692BATC+ 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+?
For technical support, including MAX17692BATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17692BATC+ requirements.
6.How does Aetrix verify that MAX17692BATC+ is sourced from the original manufacturer or authorized distributors?
All MAX17692BATC+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX17692BATC+?
All MAX17692BATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17692BATC+, 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+ part is unused and in its original packaging.
Return procedure for MAX17692BATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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