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Analog Devices Inc./Maxim Integrated MAX17061ETI+T
- Part No.:
- MAX17061ETI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX17061ETI+T.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
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Product details
Overview
MAX17061ETI+T from Maxim Integrated is an 8-string white LED driver IC for large LCD backlight systems, featuring integrated 45V/150mΩ MOSFET, SMBus™-programmable dimming, ±1.5% inter-string current matching, 25mA fixed or 15–30mA adjustable full-scale LED current, and selectable 500kHz/750kHz/1MHz switching frequency. It operates from 4.5V to 26V input and delivers up to 45V output for driving 10-series LED strings in notebook and tablet displays.
For engineers reviewing the MAX17061ETI+T datasheet, MAX17061ETI+T pinout, MAX17061ETI+T application, or MAX17061ETI+T equivalent, key selection criteria include inter-string current regulation accuracy, DPWM dimming resolution (8-bit), open/short LED fault handling, thermal shutdown threshold (160°C), and compatibility with Intel DPST power-saving protocols.
Technical Context
The MAX17061ETI+T integrates a fixed-frequency current-mode step-up controller with internal 45V MOSFET and eight independent current-sink regulators. Its feedback architecture dynamically selects the lowest FB_ voltage to regulate VOUT, enabling stable operation across varying string configurations and load conditions.
Dimming is implemented via dual-path DPWM generation: externally applied PWM signal (5–100kHz) is filtered at PWMO and converted to digital duty cycle, while SMBus commands (0x00–0xFF) scale that value-supporting Intel DPST-compliant brightness control with 8-bit granularity and resistor-programmable DPWM frequency (197Hz–1.4kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 26V - supports wide-input industrial and battery-backed LCD power rails without external pre-regulation. |
| LED String Capacity | Up to 8 parallel strings × 10 series LEDs - enables high-brightness backlighting for 10–17″ LCD panels. |
| Current Regulation Accuracy | ±1.5% between strings - ensures uniform luminance across display zones without manual calibration. |
| Full-Scale LED Current | 25mA (fixed) or 15–30mA (adjustable via ISET resistor) - allows brightness tuning and thermal optimization per design. |
| Switching Frequency | 500kHz / 750kHz / 1MHz (OSC pin-selectable) - trades off inductor size vs. efficiency in compact portable layouts. |
| DPWM Dimming Resolution | 8-bit (256 steps) - provides smooth, flicker-free brightness transitions compatible with DPST power management. |
| Thermal Shutdown Threshold | 160°C - protects against sustained overloads while permitting transient peak operation in thermally constrained enclosures. |
Pinout & Package
The MAX17061ETI+T is housed in a thermally enhanced 28-pin, 4mm × 4mm Thin QFN package with exposed pad (EP) for PCB ground connection and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1–FB8 | LED string cathode current-sink outputs | Each sinks up to 30mA; internal regulation ensures ±1.5% current matching; unused pins must connect to VCC. |
| LX1, LX2 | Internal MOSFET drain nodes | Must be shorted externally; drive boost inductor/diode; rated for 45V max and 1.6A peak current. |
| ISET | Full-scale LED current programming input | Resistor-to-GND sets 15–30mA range; tie to VCC for 25mA default; 133kΩ–266kΩ supported. |
| FSET | DPWM oscillator frequency adjustment | Resistor-to-GND programs DPWM frequency from 197Hz to 1.4kHz with ±1.5% accuracy. |
| OSC | Step-up converter switching frequency select | Tri-level logic: GND = 500kHz, float = 750kHz, VCC = 1MHz - enables layout-optimized frequency choice. |
| PWMI / PWMO | PWM input and filtered output | PWMI accepts 5–100kHz external PWM; PWMO provides low-pass filtered analog representation for internal digitization. |
| SDA / SCL | SMBus 2-wire interface | Supports standard SMBus timing (10–100kHz); enables brightness, fault status, and configuration register access. |
| OV | Output overvoltage sense input | Monitors VOUT via resistive divider; trips at 1.236V threshold to limit output to safe level (e.g., ≤45V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 45V/150mΩ MOSFET | Eliminates external high-voltage switch, reduces BOM count, and saves >25% PCB area versus discrete solutions. |
| Low 625mV FB_ sense voltage at 25mA | Minimizes power loss in current-sense path, improving overall efficiency by ~1.2% at full brightness. |
| Independent open/short LED detection | Disables faulty strings within 2ms while maintaining operation of remaining strings - critical for display reliability. |
| Programmable DPWM frequency & dual-interface dimming | Enables coexistence of hardware PWM and SMBus control, supporting both legacy and DPST-compliant system architectures. |
| Thermal shutdown + cycle-by-cycle current limit | Provides layered protection: fast current limiting prevents inductor saturation; thermal cutoff guards against sustained overload. |
Applications
| Notebook LCD Backlight | Tablet Display Power |
|---|---|
|
Use Scenario: Driving 8×10-series WLED array in 13.3″ notebook panel with dynamic brightness scaling. IC Role / Device Role / Timing Role: Primary backlight controller managing boost conversion, per-string current regulation, and DPST-synchronized dimming. Use Value: Delivers uniform brightness with ±1.5% string matching and extends battery life via 8-bit DPWM dimming aligned with Intel DPST. |
Use Scenario: Compact 10.1″ tablet display requiring low-profile power solution with fault resilience. IC Role / Device Role / Timing Role: Integrated LED driver providing regulated current, SMBus-configurable startup, and thermal-safe operation in confined space. Use Value: 4mm × 4mm Thin QFN package and internal MOSFET reduce board area by 35% vs. discrete alternatives. |
| Subnotebook Display System | Industrial Panel PC Backlight |
|
Use Scenario: Ultra-thin subnotebook with 4-string WLED array and aggressive thermal constraints. IC Role / Device Role / Timing Role: High-efficiency step-up controller with 500kHz/750kHz/1MHz frequency selection for optimal inductor sizing. Use Value: Selectable switching frequency enables trade-off between component height (1MHz) and efficiency (500kHz) without redesign. |
Use Scenario: Ruggedized panel PC operating in extended temperature range (−40°C to +85°C) with continuous backlight demand. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with open/short detection, thermal shutdown, and robust SMBus communication. Use Value: Guaranteed operation across −40°C to +85°C and built-in diagnostics ensure uptime in unattended industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MH/NOPB | External MOSFET required; no integrated SMBus interface; fixed 1.25V current-sense threshold. | Requires external microcontroller for dimming control; lacks DPST support and inter-string matching circuitry. | Preferred when cost sensitivity outweighs integration needs and system already includes SMBus master. |
| TPS61165DRVR | Single-string driver (not multi-string); no SMBus; 1.2A max switch current; 2.7–6V input only. | Not suitable for 8-string LCD backlights; limited to small displays or indicator lighting. | Select only for single-string, low-voltage (<6V) applications where MAX17061ETI+T's multi-string capability is unnecessary. |
Compared with LM3409MH/NOPB and TPS61165DRVR, the MAX17061ETI+T uniquely combines 8-string current regulation, SMBus programmability, and integrated 45V MOSFET-enabling single-chip LCD backlight solutions with DPST compliance and field-serviceable fault reporting.
Availability
MAX17061ETI+T is available at Aetrix Electronics and suitable for notebook LCD backlighting, tablet display power, and industrial panel PC backlighting requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX17061ETI+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, computing, and consumer applications.
The MAX17061ETI+T belongs to Maxim's high-efficiency LED driver product line, engineered specifically for large-format LCD backlight systems requiring precise current matching, intelligent fault handling, and DPST-compatible dimming control.
FAQ
What is the maximum number of LED strings supported by the MAX17061ETI+T?
The MAX17061ETI+T supports up to eight independent LED strings, each configurable with up to 10 series-connected white LEDs. This capacity is enabled by its eight dedicated FB_ current-sink outputs (FB1–FB8), each capable of sinking up to 30mA with ±1.5% inter-string current regulation accuracy. The MAX17061ETI+T maintains this performance across its full 4.5V–26V input range and operating temperature of −40°C to +85°C.
How does the MAX17061ETI+T implement dimming control?
The MAX17061ETI+T implements dimming using dual-path DPWM generation: it accepts an external PWM signal at PWMI (5–100kHz), filters it at PWMO, and converts the duty cycle to digital form; simultaneously, SMBus commands (0x00–0xFF) scale that value-enabling Intel DPST-compliant brightness control with 8-bit resolution. The MAX17061ETI+T also supports standalone PWM or SMBus-only modes, and its DPWM frequency is resistor-programmable via FSET.
What protection features are integrated into the MAX17061ETI+T?
The MAX17061ETI+T integrates open-string detection (triggers if FB_ < 175mV), short-string detection (triggers if FB_ > 1.1×VCC), output overvoltage protection (via OV pin with 1.236V threshold), cycle-by-cycle current limiting (1.6A peak), and thermal shutdown at 160°C. Faulty strings are disabled within 2ms while others remain operational. The MAX17061ETI+T also includes UVLO (4.25V threshold) and soft-start to prevent inrush current damage.
Can the MAX17061ETI+T operate with input voltages below 5.5V?
Yes-the MAX17061ETI+T supports input voltages from 4.5V to 26V. When VIN ≤ 5.5V, the internal 5V LDO is disabled by tying VCC to IN and supplying external 5V to VCC. This bypasses the LDO to reduce power dissipation and maintain efficiency. The MAX17061ETI+T's VCC UVLO threshold remains active (4.25V rising edge), ensuring reliable startup even under low-input conditions.
What is the purpose of the OSC pin on the MAX17061ETI+T?
The OSC pin on the MAX17061ETI+T selects the step-up converter's switching frequency: connect to GND for 500kHz, leave floating for 750kHz, or connect to VCC for 1MHz. This tri-level configuration allows designers to optimize external component size (smaller inductors/capacitors at 1MHz) versus efficiency (lower switching losses at 500kHz). The MAX17061ETI+T's internal oscillator maintains ±10% frequency tolerance across temperature and supply variations.
MAX17061ETI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 26V
- Voltage - Output:
- 5V
- Current - Output / Channel:
- 30mA
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (4x4)
MAX17061ETI+T FAQ
1.How can I place an order for MAX17061ETI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17061ETI+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 MAX17061ETI+T reliable?
The price and inventory of MAX17061ETI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17061ETI+T is usually 5 days.
3.What payment methods are accepted for MAX17061ETI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17061ETI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17061ETI+T?
MAX17061ETI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17061ETI+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 MAX17061ETI+T?
For technical support, including MAX17061ETI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17061ETI+T requirements.
6.How does Aetrix verify that MAX17061ETI+T is sourced from the original manufacturer or authorized distributors?
All MAX17061ETI+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 MAX17061ETI+T meets industry standards.
7.What is the process for return or replacement of MAX17061ETI+T?
All MAX17061ETI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17061ETI+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 MAX17061ETI+T part is unused and in its original packaging.
Return procedure for MAX17061ETI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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