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Analog Devices Inc./Maxim Integrated MAX16834AUP/V+T
- Part No.:
- MAX16834AUP/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16834AUP/V+T.pdf
- Description:
- IC LED DRIVER CTRLR PWM 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,978
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Product details
Overview
MAX16834AUP/V+T from Maxim Integrated is a current-mode high-power LED driver IC for boost, boost-buck, SEPIC, and high-side buck topologies, integrating high-side LED current sensing, 3A gate driver (NDRV), 50mA dimming driver (DIMOUT), 100kHz–1MHz programmable switching frequency, and true differential overvoltage protection. It enables wide-range PWM dimming up to 20kHz in automotive front/rear lighting systems.
For engineers reviewing the MAX16834AUP/V+T datasheet, MAX16834AUP/V+T pinout, MAX16834AUP/V+T application, or MAX16834AUP/V+T equivalent, key selection considerations include its integrated high-side current-sense amplifier (9.9V/V gain, ±2.4mV offset), dual LDOs (7V VCC, 5V CLV), fault flag (FLT) with overvoltage/short-circuit/thermal warning, and thermally enhanced 20-pin TQFN-EP package rated for −40°C to +125°C.
Technical Context
The MAX16834AUP/V+T implements constant-frequency peak current-mode control with programmable slope compensation via external capacitor on SC pin, enabling stable operation across duty cycles up to 99.5%. Its transconductance error amplifier (500μS typical, 60dB open-loop gain) interfaces with REFI for analog dimming and PWM comparator for digital dimming coordination.
It supports topology-flexible LED regulation: LV pin configures reference (SGND for boost, IN for boost-buck); OVP+ senses differential overvoltage with 1.435V threshold and 200mV hysteresis; SENSE+ accepts high-side current sense with 1kΩ input impedance when VLV > 5V; NDRV delivers ±3A peak drive into external n-channel MOSFETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 100kHz–1MHz, set by RT/SYNC resistor or synchronized to external clock ≥2V high threshold |
| LED Dimming Range | 3000:1 via combined PWM (up to 20kHz) and analog (REFI DC input) control |
| High-Side Current Sense Gain | 9.9V/V with ±2.4mV input offset, enabling accurate LED current regulation in boost-buck configurations |
| NDRV Gate Driver | ±3A peak sink/source, supporting high-power n-channel MOSFETs with <1.9Ω pulldown RDSON |
| VCC LDO Output | 7V ±0.7V at up to 50mA, powers NDRV and internal circuitry; dropout ≤1V at 35mA |
| CLV High-Side Regulator | 5V ±0.3V referenced to LV, supplies DIMOUT driver; supports 2mA load with 0.5V dropout |
| Operating Temperature | −40°C to +125°C ambient, qualified for automotive applications with thermal warning at +140°C |
| Package | 20-pin TQFN-EP (4mm × 4mm), θJA = 39°C/W, EP connected to SGND for thermal dissipation |
Pinout & Package
MAX16834AUP/V+T is housed in a thermally enhanced 4mm × 4mm, 20-pin TQFN-EP package with exposed pad (EP) requiring connection to a large-area contiguous copper SGND plane for effective heat dissipation. EP is not the primary signal ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OVP+ | Overvoltage protection sense input | Differential input referenced to LV; triggers FLT and disables NDRV when (OVP+ − LV) > 1.435V |
| 2 SGND | Signal ground reference | Reference for REF, COMP, REFI, SC, PWMDIM, FLT; separate from PGND to minimize noise coupling |
| 3 COMP | Error amplifier output | Transconductance amplifier output; connects RC compensation network to SGND for loop stability |
| 4 REF | 3.7V precision reference output | Stable 3.7V ±75mV source for external biasing; supplies up to 1mA; bypass with 0.1–0.22μF ceramic to SGND |
| 5 REFI | Analog dimming reference input | DC voltage input (0–2V range) setting LED current via current-sense amplifier; bias current <1μA |
| 6 SC | Slope compensation ramp node | Connects external capacitor to SGND; 100μA pull-up current generates ramp for current-mode stability |
| 7 FLT | Active-low open-drain fault flag | Asserts low on LED overvoltage, short, or thermal fault; sinks 2–10mA at 0.2V; requires external pull-up |
| 8 RT/SYNC | Frequency programming/synchronization | Resistor-to-SGND sets fSW; external clock ≥2V high enables sync mode with 200ns minimum pulse width |
| 9 UVEN | Enable/UVLO input | 1.435V threshold with 200mV hysteresis; enables device when driven above threshold; also functions as enable/disable control |
| 10 PWMDIM | PWM dimming command input | 1.435V logic threshold; controls dimming MOSFET via DIMOUT; propagation delay 200ns to DIMOUT |
| 11 CS | Peak current limit sense | Connects to current-sense resistor; terminates switch on-time when voltage exceeds 0.3V threshold |
| 12 PGND | Power ground return | Return path for NDRV, DIMOUT, and high-current paths; separate from SGND to reduce ground bounce |
| 13 NDRV | n-Channel MOSFET gate driver | ±3A peak output swinging between VCC and PGND; drives external power switch in HB LED converter |
| 14 VCC | 7V low-dropout regulator output | Supplies NDRV and internal logic; requires ≥1μF ceramic bypass to PGND; dropout ≤1V at 35mA |
| 15 IN | Main power supply input | 4.75V–28V operating range; bypass with ≥0.1μF ceramic to PGND; supports >28V with external clamp in boost |
| 16 HV | High-side regulator input | Input for CLV regulator; connect to IN (boost-buck) or VCC/IN (boost); max 28V w.r.t. PGND |
| 17 CLV | 5V high-side regulator output | Supplies DIMOUT driver; referenced to LV; bypass 0.1–1μF ceramic to LV; max 2mA load |
| 18 DIMOUT | Dimming MOSFET gate driver | ±50mA sink/source; drives external n-channel dimming FET in series with LED string |
| 19 LV | High-side reference voltage input | Configures topology: connect to SGND (boost/SEPIC) or IN (boost-buck/high-side buck) |
| 20 SENSE+ | High-side LED current sense input | Differential input (vs. LV); feeds internal 9.9V/V amplifier; requires ≥0.1μF bypass to LV near IC |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side current-sense amplifier | Eliminates need for external high-side sense IC in boost-buck LED drivers, reducing BOM count and layout complexity |
| Dual independent LDOs (VCC and CLV) | 7V/50mA VCC powers gate driver; 5V/2mA CLV powers dimming driver-enabling isolated power domains for noise-sensitive analog blocks |
| True differential overvoltage protection | OVP+ senses voltage across LED string relative to LV, providing robust protection against open-circuit or overvoltage faults without relying on ground-referenced sensing |
| Programmable slope compensation | External capacitor on SC pin tailors ramp slope to match inductor current slope, ensuring stable current-mode operation across all duty cycles and topologies |
| Thermal warning with hysteresis | FLT asserts at +140°C junction temperature with 20°C hysteresis, enabling graceful thermal derating before shutdown |
| Topology flexibility via LV pin | Single IC supports boost, boost-buck, SEPIC, and high-side buck by reconfiguring LV connection-reducing design reuse effort across lighting platforms |
Applications
| Automotive Front Lighting | Architectural MR16 Lighting |
|---|---|
Use Scenario: Adaptive LED headlamp modules requiring precise current regulation and flicker-free dimming under 12V/24V automotive supply with load dump transients. IC Role / Device Role / Timing Role: Primary HB LED current controller implementing boost-buck topology with LV tied to IN, using integrated high-side sense to regulate string current independently of battery variation. Use Value: Enables compliance with ECE R149 photometric stability requirements via 3000:1 dimming range and <±2.4mV current-sense offset, minimizing calibration overhead. |
Use Scenario: Low-voltage MR16 LED retrofit lamps powered from 12V AC/DC transformers with space-constrained PCBs. IC Role / Device Role / Timing Role: Compact boost LED driver with integrated 7V VCC LDO powering NDRV and 5V CLV powering DIMOUT, eliminating discrete regulators. Use Value: Reduces bill-of-materials by two LDOs and one high-side sense amplifier while maintaining 20kHz PWM dimming compatibility with standard wall dimmers. |
| Projection System RGB Light Engine | Industrial Spot Lighting |
Use Scenario: High-lumen RGB LED arrays in DLP/LCoS projectors requiring fast, synchronized dimming across color channels with minimal inter-channel crosstalk. IC Role / Device Role / Timing Role: Triple-MAX16834AUP/V+T configuration with RT/SYNC pins daisy-chained to single master clock, enabling phase-aligned switching and simultaneous PWM dimming. Use Value: Achieves <100ns inter-channel timing skew and eliminates color breakup artifacts through hardware-synchronized 100kHz–1MHz operation. |
Use Scenario: High-intensity industrial inspection lights operating continuously in ambient temperatures up to +85°C with mandatory thermal fault reporting. IC Role / Device Role / Timing Role: Boost-buck LED driver with FLT output wired to PLC I/O for real-time fault logging; thermal warning at +140°C prevents catastrophic failure during extended runtime. Use Value: Delivers 2051mW continuous power dissipation at +70°C ambient (θJA = 39°C/W), enabling fanless enclosure designs with predictive thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3410XMY/NOPB | Single-stage boost-only topology; no integrated high-side sense; 1.25MHz fixed frequency; 1.2A NDRV drive | Lacks boost-buck/SEPIC support and true differential OVP; suitable only for simple boost LED strings ≤10W | Select when board space is critical and topology is strictly boost with lower power (<15W) and no automotive temperature requirement |
| TPS92692QPWPRQ1 | Automotive-qualified; includes integrated 5V/150mA LDO and 1.5A gate driver; supports analog/PWM dimming but no high-side sense amplifier | Requires external high-side sense for boost-buck; offers better EMI performance via spread-spectrum but narrower dimming range (1000:1) | Prefer for AEC-Q100 Grade 1 designs where integrated diagnostics and ASIL-B support outweigh loss of high-side sense integration |
Compared with LM3410XMY/NOPB and TPS92692QPWPRQ1, the MAX16834AUP/V+T uniquely combines topology flexibility (boost-buck/SEPIC), integrated high-side current sensing, and dual-LDO architecture-making it optimal for space-constrained, multi-topology automotive and architectural lighting where BOM reduction and thermal robustness are prioritized over spread-spectrum EMI control.
Availability
MAX16834AUP/V+T is available at Aetrix Electronics and suitable for automotive front lighting, architectural MR16 lamps, and projection system RGB light engines requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16834AUP/V+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 demanding industrial, automotive, and communications applications.
The MAX16834 product line was designed specifically for high-brightness LED driver applications requiring topology flexibility, integrated protection, and wide dimming range-targeting automotive lighting, architectural fixtures, and professional projection systems.
FAQ
What is the maximum input voltage supported by MAX16834AUP/V+T in boost configuration?
The MAX16834AUP/V+T operates natively from 4.75V to 28V. In boost configuration, it supports input voltages greater than 28V when an external voltage clamp limits the IN pin voltage to ≤28V, as specified in the Absolute Maximum Ratings and Applications Information sections of the datasheet. This enables compatibility with 36V automotive systems and industrial 48V rails with proper clamping.
Does MAX16834AUP/V+T support both analog and PWM dimming simultaneously?
Yes, the MAX16834AUP/V+T supports concurrent analog and PWM dimming: analog dimming is controlled via DC voltage applied to REFI (0–2V range), while PWM dimming is applied to PWMDIM. The internal transconductance error amplifier blends both inputs, enabling hybrid dimming schemes-for example, coarse analog adjustment with fine PWM resolution for flicker-free operation at low brightness levels.
What is the function of the LV pin on MAX16834AUP/V+T, and how does it affect topology selection?
The LV pin on MAX16834AUP/V+T serves as the reference for high-side current sensing and overvoltage protection. Connecting LV to SGND configures the IC for boost or SEPIC topologies; connecting LV to IN enables boost-buck or high-side buck operation. This single pin reconfiguration allows one IC design to serve multiple converter architectures without changing the schematic core.
How does the MAX16834AUP/V+T implement overvoltage protection, and what happens when it triggers?
The MAX16834AUP/V+T implements true differential overvoltage protection via the OVP+ pin, which senses voltage relative to LV-not ground. When (OVP+ − LV) exceeds 1.435V, NDRV is disabled to halt switching, and FLT asserts low. The protection includes 200mV hysteresis, so NDRV re-enables only after the differential drops to 1.235V. Crucially, DIMOUT remains active, preserving PWM dimming functionality during OVP events.
Can MAX16834AUP/V+T be used in DC-DC converter applications beyond LED driving?
Yes, the MAX16834AUP/V+T is explicitly qualified for general-purpose DC-DC converter applications including boost and boost-buck topologies, as stated in the General Description and Applications sections. Its current-mode control, programmable frequency, dual LDOs, and robust protection features make it suitable for non-LED power conversion-such as auxiliary 5V/7V rail generation-provided the output current and voltage requirements align with its gate driver and sense capabilities.
MAX16834AUP/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.75V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- 27V
- Current - Output / Channel:
- -
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MAX16834AUP/V+T FAQ
1.How can I place an order for MAX16834AUP/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16834AUP/V+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 MAX16834AUP/V+T reliable?
The price and inventory of MAX16834AUP/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16834AUP/V+T is usually 5 days.
3.What payment methods are accepted for MAX16834AUP/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16834AUP/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16834AUP/V+T?
MAX16834AUP/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16834AUP/V+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 MAX16834AUP/V+T?
For technical support, including MAX16834AUP/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16834AUP/V+T requirements.
6.How does Aetrix verify that MAX16834AUP/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16834AUP/V+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 MAX16834AUP/V+T meets industry standards.
7.What is the process for return or replacement of MAX16834AUP/V+T?
All MAX16834AUP/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16834AUP/V+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 MAX16834AUP/V+T part is unused and in its original packaging.
Return procedure for MAX16834AUP/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16834AUP/V+T Tags
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