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Analog Devices Inc./Maxim Integrated MAX25510ATGA/V+
- Part No.:
- MAX25510ATGA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
MAX25510ATGA/V+.pdf
- Description:
- IC LED DRV RGLTR PWM 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:782
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Product details
Overview
The MAX25510ATGA/V+ from Analog Devices is a 4-channel, automotive-grade white-LED backlight driver with integrated current-mode boost converter, delivering up to 120mA per channel, operating from 3V post-startup, and featuring AEC-Q100 Grade 1 qualification for -40°C to +125°C operation.
For engineers reviewing the MAX25510ATGA/V+ datasheet, MAX25510ATGA/V+ pinout, MAX25510ATGA/V+ application, or MAX25510ATGA/V+ equivalent, this device supports high-EMI-immunity automotive displays via spread spectrum, phase-shift dimming, 16667:1 dimming ratio at 200Hz, and diagnostic FLTB output for open/short LED and thermal faults.
Technical Context
The MAX25510ATGA/V+ integrates a current-mode DC-DC controller supporting both boost and SEPIC topologies, with programmable switching frequency (400kHz–2.2MHz), external clock synchronization capability, and built-in spread spectrum modulation to reduce peak EMI emissions.
It implements four independent linear LED current sinks with precise 120mA per channel regulation, analog/digital dimming support, automatic fade-in/fade-out, NTC-based thermal foldback, and comprehensive fault detection including open-LED, shorted-LED, OUT_ short-to-GND, and thermal shutdown at 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Output Channels | 4 independent current sinks, each capable of sinking up to 120mA for driving LED strings in automotive displays. |
| Input Voltage Range | 4.5V to 36V operating range; sustains down to 3V after startup for cold-crank resilience in automotive battery systems. |
| Boost Current Limit | 3A minimum (MAX25510 variant), enabling robust power delivery for high-brightness LED backlights under load transients. |
| Dimming Ratio | 16667:1 at 200Hz PWM dimming, supporting ultra-fine brightness control required in instrument clusters and HUDs. |
| Switching Frequency | 400kHz–2.2MHz, adjustable via RT resistor or external sync clock, allowing layout-optimized noise management and EMI compliance. |
| Operating Temperature | -40°C to +125°C ambient, qualified to AEC-Q100 Grade 1, ensuring reliability in under-hood and dashboard environments. |
| Package | 24-pin TQFN (4mm × 4mm, T2444+4C), optimized for thermal performance with θJA = 36°C/W on multilayer PCB. |
Pinout & Package
MAX25510ATGA/V+ uses a 24-pin TQFN package (4mm × 4mm, exposed pad, code T2444+4C) with wettable flanks and RoHS-compliant finish. Thermal resistance θJA = 36°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 DRAIN | Internal nMOSFET drain node | Connects to external boost inductor and rectifier diode; handles up to 4.5A peak current and 40V max voltage. |
| 3 IN | Main input supply | Accepts protected automotive battery (4.5V–36V); requires local 2.2μF + 0.1μF bypass for stability and transient response. |
| 4 NGATE | External nMOS gate driver | Drives series disconnect MOSFET via internal charge pump; supports fast turn-on and overvoltage protection (LDUMP). |
| 11–12,20–21 OUT1–OUT4 | LED string cathode sinks | Four open-drain linear current sinks; each regulates up to 120mA with <±2.2% channel matching at full scale. |
| 13 ISET | Current reference programming | Resistor-to-GND sets LED current (e.g., 12.5kΩ → 120mA); enables precise, temperature-stable current calibration. |
| 16 FLTB | Fault status output | Open-drain diagnostic signal asserting low on open/short LED, thermal shutdown, or output undervoltage conditions. |
| 17 DIM / 18 ADIM | Dimming control inputs | DIM accepts 90Hz–50kHz PWM; ADIM accepts 10kHz–1MHz analog control voltage for seamless brightness transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum modulation | Reduces EMI peak amplitude by spreading switching energy across 400kHz–2.2MHz band, easing CISPR 25 Class 5 compliance. |
| Phase-shift dimming option | Staggered channel activation minimizes input current ripple and reduces conducted EMI without requiring additional filtering. |
| NTC-based thermal foldback | Automatically scales LED current downward above threshold using TEMP pin and external thermistor, preventing thermal runaway. |
| Automatic fade-in/fade-out | Smooths brightness transitions during dimming changes, eliminating visible flicker or step artifacts in human-viewable displays. |
| Integrated fault diagnostics | Single FLTB pin reports open LED, shorted LED, OUT_ short-to-GND, thermal shutdown, and boost undervoltage via PWM duty cycle encoding. |
Applications
| Automotive Instrument Cluster | Automotive Central Information Display |
|---|---|
Use Scenario: High-reliability backlighting for TFT-LCD gauges with variable ambient lighting and wide temperature exposure. IC Role / Device Role / Timing Role: 4-channel LED driver with integrated boost, providing synchronized dimming and fault-safe operation. Use Value: Enables crisp, uniform illumination across multi-zone displays while meeting AEC-Q100 Grade 1 and ISO 16750-2 requirements. |
Use Scenario: Backlight control for large-format infotainment screens requiring high dynamic range and low EMI in cabin electronics. IC Role / Device Role / Timing Role: Integrated boost + linear sink architecture delivers stable current with minimal external components and EMI filtering. Use Value: Achieves >16,000:1 dimming ratio and spread-spectrum operation to pass stringent automotive EMC tests without added shielding. |
| Automotive Head-Up Display (HUD) | Advanced Driver Assistance System (ADAS) Display |
Use Scenario: Compact, high-efficiency backlight for projection-based HUD optics where thermal density and EMI are critical. IC Role / Device Role / Timing Role: Low-noise current regulation with phase-shift dimming ensures flicker-free projection and minimal interference with camera/radar sensors. Use Value: 120mA/channel capability and 4mm × 4mm TQFN package enable dense optical engine integration with minimal board area. |
Use Scenario: Safety-critical display backlighting for ADAS warning indicators requiring guaranteed fault reporting and fail-safe behavior. IC Role / Device Role / Timing Role: FLTB diagnostic output provides real-time fault classification (open/short LED, thermal, undervoltage) to host microcontroller. Use Value: Supports ASIL-B system-level compliance through deterministic fault signaling and thermal foldback without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25511ATGA/V+ | Higher 4.5A min boost current limit; identical pinout, package, and feature set. | Better suited for higher-power LED strings or longer cable runs requiring greater headroom. | Select MAX25511ATGA/V+ when output power exceeds 15W or when operating near thermal limits with 120mA/channel loads. |
| LM3409QMH/NOPB | Single-channel buck-boost LED controller; no integrated current sinks, no FLTB diagnostics, no AEC-Q100 Grade 1 rating. | Requires external FETs, current sense, and fault logic; limited to non-safety-critical or non-automotive use. | Choose LM3409QMH/NOPB only for cost-sensitive, single-string designs where diagnostics and automotive qualification are not required. |
Compared with MAX25510ATGA/V+, the MAX25511ATGA/V+ offers higher boost current for increased power margin, while the LM3409QMH/NOPB lacks integrated sinks, diagnostics, and automotive qualification-making it unsuitable for direct replacement in safety-critical displays.
Availability
MAX25510ATGA/V+ is available at Aetrix Electronics and suitable for automotive instrument clusters, central information displays, and head-up displays requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX25510ATGA/V+ 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, serving automotive, industrial, communications, and healthcare markets.
The MAX25510/MAX25511 product line is designed specifically for automotive display backlighting, integrating boost conversion, precision current regulation, and comprehensive diagnostics into a single AEC-Q100 Grade 1 package.
FAQ
What is the minimum input voltage the MAX25510ATGA/V+ can sustain after startup?
The MAX25510ATGA/V+ operates down to 3V on the IN pin after startup, enabling reliable functionality during automotive cold-crank events where battery voltage dips below nominal levels. This low-voltage capability is maintained across the full -40°C to +125°C temperature range and does not require re-enabling the device once entered.
How does the FLTB pin on the MAX25510ATGA/V+ report fault conditions?
The FLTB pin on the MAX25510ATGA/V+ is an open-drain output that asserts low during faults and encodes fault type via PWM duty cycle: 12.5% for open LED, 25% for shorted LED, 50% for thermal shutdown, and 75% for output undervoltage. This allows host MCU diagnosis without additional ADC or GPIO resources.
Can the MAX25510ATGA/V+ drive LED strings with different forward voltages per channel?
Yes-the MAX25510ATGA/V+ supports individual LED string configurations because each OUTx pin operates as an independent linear current sink referenced to LEDGND. The integrated boost converter supplies a common VOUT rail, and channel-specific current regulation remains accurate regardless of inter-string Vf variation up to the maximum boost output voltage.
What is the purpose of the RSDT pin on the MAX25510ATGA/V+?
The RSDT pin on the MAX25510ATGA/V+ sets the LED short-detection threshold via a resistor divider from V18 to GND. It allows programmable sensitivity for detecting partial shorts across LED strings-critical for avoiding false trips in high-voltage automotive LED arrays-and can be disabled by connecting RSDT directly to V18.
Does the MAX25510ATGA/V+ support synchronization to an external clock source?
Yes-the MAX25510ATGA/V+ supports external clock synchronization via the RT pin. An AC-coupled clock signal (400kHz–2.2MHz) applied to RT overrides the internal oscillator, enabling EMI reduction through frequency alignment with other switching regulators in the system and simplifying filter design.
MAX25510ATGA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- -
- Current - Output / Channel:
- 120mA
- Frequency:
- 400kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TQFN (4x4)
MAX25510ATGA/V+ FAQ
1.How can I place an order for MAX25510ATGA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25510ATGA/V+ 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 MAX25510ATGA/V+ reliable?
The price and inventory of MAX25510ATGA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25510ATGA/V+ is usually 5 days.
3.What payment methods are accepted for MAX25510ATGA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25510ATGA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25510ATGA/V+?
MAX25510ATGA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25510ATGA/V+ 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 MAX25510ATGA/V+?
For technical support, including MAX25510ATGA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25510ATGA/V+ requirements.
6.How does Aetrix verify that MAX25510ATGA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX25510ATGA/V+ 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 MAX25510ATGA/V+ meets industry standards.
7.What is the process for return or replacement of MAX25510ATGA/V+?
All MAX25510ATGA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25510ATGA/V+, 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 MAX25510ATGA/V+ part is unused and in its original packaging.
Return procedure for MAX25510ATGA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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