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Analog Devices Inc./Maxim Integrated MAX16833BAUE+T
- Part No.:
- MAX16833BAUE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16833BAUE+T.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,696
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Product details
Overview
MAX16833BAUE+T from Maxim Integrated is a peak current-mode-controlled high-voltage LED driver IC for boost, buck-boost, SEPIC, flyback, and high-side buck topologies. It integrates a 3A sink/source N-channel MOSFET gate driver (NDRV), high-side current-sense amplifier (200mV full-scale), and p-channel dimming MOSFET driver (DIMOUT), operating across 5V–65V input with -40°C to +125°C industrial temperature range. Used in automotive DRLs and adaptive front-lighting systems.
For engineers reviewing the MAX16833BAUE+T datasheet, MAX16833BAUE+T pinout, MAX16833BAUE+T application, or MAX16833BAUE+T equivalent, key selection criteria include its 100kHz–1MHz programmable switching frequency, 1.64V ±2% reference (B/D variants), high-side ISENSE± sensing architecture, fault-indicator FLT output, and thermally enhanced 16-pin TSSOP package with exposed pad.
Technical Context
The MAX16833BAUE+T implements constant-frequency peak current-mode control with externally programmable slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its transconductance error amplifier (GM = 2100–4900 µS) interfaces with COMP for loop stability, while UVLO (4.2V rising / 4.05V falling) ensures reliable startup and shutdown across wide input voltage swings.
It supports dual dimming: PWM via PWMDIM (1.225V threshold, 70mV hysteresis) with <3µs turn-on/2µs turn-off timing, and analog dimming via ICTRL (0–1.4V linear range, 200nA bias current). The integrated 7V VCC LDO powers the gate driver, and OVP input provides fast overvoltage protection with 1.225V threshold and 70mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 65V - supports wide-range automotive and industrial DC supplies without external pre-regulation |
| Switching Frequency | 100kHz to 1MHz - set by single RT/SYNC resistor; enables optimization of efficiency vs. EMI vs. magnetics size |
| Current-Sense Voltage | 199mV typical - low-loss, high-accuracy high-side sensing reduces power dissipation in sense resistor |
| NDRV Peak Current | 3A sink/source - drives high-Qg power MOSFETs directly in high-power LED applications |
| Reference Voltage | 1.64V ±2% - stable analog dimming reference for precise LED current programming (B/D variant) |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive lighting and harsh industrial environments |
| Fault Indicator | Active-low open-drain FLT - signals short-circuit, overtemperature, or overvoltage conditions for system-level diagnostics |
Pinout & Package
MAX16833BAUE+T is housed in a thermally enhanced 16-pin TSSOP package (5mm × 4.4mm) with exposed pad (EP) for PCB thermal management. Pin 1 is LFRAMP (not used in B variant); Pin 16 is IN; EP must be connected to ground plane for heat sinking but not used as sole ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LFRAMP) | Low-Frequency Ramp Output | Unused in MAX16833B; connect to SGND - distinguishes B variant from C/G versions with dithering capability |
| 2 (RT/SYNC) | Oscillator Programming & Sync Input | Resistor-to-ground sets fSW; AC-coupled external clock enables synchronization - critical for EMI reduction |
| 4 (ICTRL) | Analog Dimming Control Input | 0–1.4V linearly adjusts LED current; 200nA bias enables high-impedance DAC interface |
| 7 (PWMDIM) | PWM Dimming Enable Input | 1.225V threshold with 70mV hysteresis; internal pullup allows floating default high state |
| 9 (DIMOUT) | p-MOSFET Gate Driver Output | Sinks 25mA / sources 50mA; pulls gate to -7.4V below ISENSE+ for fast, robust dimming switch control |
| 11 (ISENSE+) | High-Side Current Sense Positive Input | Accepts up to 65V common-mode voltage; enables LED+ short to VIN or GND without damage |
| 14 (NDRV) | n-MOSFET Gate Driver Output | Swings rail-to-rail between VCC and PGND; 3A peak drive supports high-power switching stages |
| 15 (VCC) | 7V LDO Regulator Output | Supplies gate driver; dropout ≤0.35V at 50mA - requires ≥1µF ceramic bypass to PGND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High-Side Current Sense | Enables LED string positive terminal to short directly to input rails without damage - unique safety advantage in automotive fault scenarios |
| Programmable Switching Frequency | 100kHz–1MHz via single resistor; supports spread-spectrum dithering in non-B variants - reduces EMI peak emissions |
| Thermally Enhanced Package | 16-pin TSSOP with exposed pad (qJC = 3°C/W) - delivers 2089mW max power dissipation at TA = +70°C |
| Dual Dimming Architecture | Simultaneous PWM (sub-µs response) and analog (ICTRL) dimming - meets stringent flicker and resolution requirements in DRLs |
| Robust Protection Suite | Short-circuit hiccup mode (non-G), overvoltage protection (OVP), thermal shutdown (+160°C), and fault-indicator FLT - improves system reliability in unattended lighting |
Applications
| Automotive Daytime Running Lights (DRLs) | Adaptive Front-Lighting Systems (AFS) |
|---|---|
Use Scenario: Constant-current LED arrays powered from 12V vehicle battery with load-dump immunity up to 70V. IC Role / Device Role / Timing Role: Primary LED current controller implementing boost topology with high-side sensing and PWM dimming. Use Value: Enables flicker-free, AEC-Q100-aligned illumination with fast dimming response (<3µs) and fault-safe operation during battery transients. | Use Scenario: Multi-zone LED headlamp modules requiring independent current control per segment with real-time brightness adjustment. IC Role / Device Role / Timing Role: High-voltage LED driver with analog dimming (ICTRL) and synchronized switching for EMI-constrained multi-driver systems. Use Value: Supports precise luminance grading across zones using 1.64V reference and low-offset current sense (≤1mV), reducing calibration overhead. |
| Commercial High-Bay Lighting | Industrial Signal & Position Lights |
Use Scenario: 48VDC-powered warehouse fixtures driving long LED strings with >65V output capability. IC Role / Device Role / Timing Role: Buck-boost or SEPIC topology controller with OVP monitoring and thermal fault reporting. Use Value: Delivers stable current regulation across wide input variation (5–65V), eliminating need for auxiliary converters in 24/48V industrial power infrastructures. | Use Scenario: Harsh-environment signaling lamps on construction equipment or rail vehicles with extended temperature operation. IC Role / Device Role / Timing Role: High-reliability LED driver with -40°C to +125°C rating, UVLO hysteresis, and open-drain FLT for PLC integration. Use Value: Ensures fail-safe indication via FLT assertion during overtemperature or short-circuit events - critical for functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HVMM/NOPB | Adjustable 1.25V reference; no integrated p-MOSFET dimming driver; requires external high-side dimming circuit | Lacks native PWM dimming driver - adds component count and layout complexity for fast dimming | Choose when cost sensitivity outweighs dimming performance and board space constraints |
| TPS92692QPWPRQ1 | Integrated 5V LDO; supports I²C interface; higher quiescent current (3.5mA vs. 2.5mA); AEC-Q100 Grade 1 | Includes digital control and diagnostics - suitable for centralized lighting controllers but over-specified for basic analog dimming | Prefer when system-level diagnostics, programmability, or automotive qualification beyond temperature grade are required |
Compared with LM3409HVMM/NOPB and TPS92692QPWPRQ1, MAX16833BAUE+T uniquely combines high-side current sensing with an integrated p-MOSFET dimming driver and 1.64V reference in a compact TSSOP, delivering lower BOM count and faster PWM response for cost-sensitive, space-constrained automotive exterior lighting.
Availability
MAX16833BAUE+T is available at Aetrix Electronics and suitable for automotive exterior lighting, commercial high-bay fixtures, and industrial signal lights requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned thermal performance.
Supply support for MAX16833BAUE+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 automotive, industrial, and communications markets.
MAX16833BAUE+T belongs to the MAX16833 family of high-voltage HB LED drivers engineered specifically for robust, high-efficiency LED current regulation in automotive exterior lighting and demanding industrial applications.
FAQ
What is the function of the LFRAMP pin on MAX16833BAUE+T?
The LFRAMP pin is unused in the MAX16833BAUE+T (B variant) and must be connected to SGND. Unlike MAX16833C/G, the B variant replaces LFRAMP with a 1.64V reference (REF) output. This pin distinction confirms MAX16833BAUE+T's identity as a B-series device optimized for analog dimming rather than spread-spectrum dithering.
Does MAX16833BAUE+T support synchronization to an external clock?
Yes, MAX16833BAUE+T supports external clock synchronization via the RT/SYNC pin. An AC-coupled external clock signal (≥1.1× fSW) can be capacitively coupled to RT/SYNC to lock the internal oscillator. This capability enables EMI reduction in noise-sensitive systems and timing coordination across multiple MAX16833BAUE+T drivers.
What is the maximum LED string voltage supported by MAX16833BAUE+T?
MAX16833BAUE+T does not impose a fixed maximum LED string voltage. Its OVP input monitors string voltage via a resistive divider; the IC disables switching when OVP exceeds 1.225V. With appropriate scaling, the OVP circuit supports LED strings up to 65V output in boost configurations - matching its maximum rated output capability.
Can MAX16833BAUE+T drive both n-channel and p-channel MOSFETs?
Yes, MAX16833BAUE+T drives an external n-channel MOSFET via NDRV (3A peak) and an external p-channel MOSFET via DIMOUT (50mA source / 25mA sink). This dual-driver architecture enables high-side buck and boost-derived topologies with independent PWM dimming control - a core feature confirmed in the MAX16833BAUE+T functional diagram and pin description.
Is MAX16833BAUE+T qualified for automotive applications?
MAX16833BAUE+T operates from -40°C to +125°C and includes automotive-grade protections (UVLO, OVP, thermal shutdown, short-circuit hiccup), but it is not explicitly AEC-Q100 certified. For production automotive use, designers should verify qualification status with Analog Devices and consult latest datasheet revision notes - MAX16833BAUE+T is widely deployed in DRL and position light designs meeting automotive environmental requirements.
MAX16833BAUE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16833BAUE+T FAQ
1.How can I place an order for MAX16833BAUE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16833BAUE+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 MAX16833BAUE+T reliable?
The price and inventory of MAX16833BAUE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16833BAUE+T is usually 5 days.
3.What payment methods are accepted for MAX16833BAUE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16833BAUE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16833BAUE+T?
MAX16833BAUE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16833BAUE+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 MAX16833BAUE+T?
For technical support, including MAX16833BAUE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16833BAUE+T requirements.
6.How does Aetrix verify that MAX16833BAUE+T is sourced from the original manufacturer or authorized distributors?
All MAX16833BAUE+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 MAX16833BAUE+T meets industry standards.
7.What is the process for return or replacement of MAX16833BAUE+T?
All MAX16833BAUE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16833BAUE+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 MAX16833BAUE+T part is unused and in its original packaging.
Return procedure for MAX16833BAUE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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