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Analog Devices Inc./Maxim Integrated MAX16824AUE+
- Part No.:
- MAX16824AUE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16824AUE+.pdf
- Description:
- IC LED DRV LIN PWM 150MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,304
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Product details
Overview
MAX16824AUE+ from Maxim Integrated is a high-voltage, three-channel linear LED driver IC designed for constant-current sinking of high-brightness LED strings. It operates from 6.5V to 28V input, delivers up to 150mA per channel with ±5% current accuracy, features independent PWM dimming inputs (PWM1–PWM3), and integrates a +5V (±5%) regulated output capable of sourcing 4mA. It is used in industrial and architectural LED lighting systems requiring precise per-channel brightness control.
For engineers reviewing the MAX16824AUE+ datasheet, MAX16824AUE+ pinout, MAX16824AUE+ application, or MAX16824AUE+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented functional differences, and supply-chain support details specific to OEM and embedded lighting design workflows.
Technical Context
The MAX16824AUE+ implements a linear constant-current sink architecture using internal DMOS pass elements, regulating each output by maintaining 200mV across its dedicated external sense resistor (CS1–CS3). Its three independent PWM inputs directly gate the output transistors with sub-microsecond turn-on/turn-off times (1µs typical) and fast transient response for flicker-free dimming down to 1% duty cycle.
It includes an integrated +5V low-dropout regulator (±5% tolerance, 4mA source capability) powered from VIN, and thermal shutdown protection triggered at +165°C with 23°C hysteresis. The device uses no external clock or serial interface-unlike the MAX16825-relying solely on logic-level PWM signals for channel enable and dimming control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 28V - supports wide-range industrial DC supplies including 12V and 24V rails without external regulators. |
| Output Current per Channel | Up to 150mA - sufficient to drive medium-power HB LED strings (e.g., 3–5 white LEDs in series at 350mA-equivalent brightness via PWM). |
| LED Current Accuracy | ±5% - ensures consistent luminance across channels without calibration, critical for color-mixed or uniform architectural lighting. |
| Current-Sense Reference | 200mV - minimizes power loss in sense resistors (e.g., 2Ω yields 100mA with only 20mW dissipation per channel). |
| Thermal Shutdown Threshold | +165°C with 23°C hysteresis - protects against sustained overloads in enclosed fixtures while allowing recovery without system reset. |
| Regulated Output | +5V (±5%), 4mA - powers auxiliary circuitry (e.g., microcontroller I/O, level shifters, or sensors) directly from the same input rail. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive ambient zones and outdoor-rated industrial enclosures. |
Pinout & Package
MAX16824AUE+ is housed in a thermally enhanced 16-pin TSSOP-EP (exposed pad) package, optimized for high-power dissipation in compact LED driver layouts. The exposed pad must be soldered to a large-area ground plane but is not electrically connected to GND internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1, OUT2, OUT3 | Open-drain constant-current sink outputs | Each drives one HB LED string anode-to-rail; rated to 36V, supports long strings with high forward voltage drops. |
| CS1, CS2, CS3 | Negative inputs of current-sense amplifiers | Connect external sense resistors (e.g., 2Ω for 100mA) between CSx and GND to set per-channel current precisely. |
| PWM1, PWM2, PWM3 | Independent logic-level dimming/enable inputs | Active-high TTL/CMOS-compatible; 0.6V low / 4V high thresholds; control duty cycle or on/off state per channel. |
| IN | Main power input | Bypass with ≥0.1µF ceramic capacitor to GND near pin; accepts 6.5–28V unregulated DC input. |
| REG | +5V regulated output | Supplies up to 4mA; requires 1µF ceramic capacitor to GND for stability; usable for biasing sensors or logic. |
| GND | Analog/digital ground reference | Single ground connection point; all sense resistors and bypass caps tie here to minimize noise coupling. |
| EP | Exposed thermal pad | Must be soldered to PCB copper pour for thermal management; not electrically connected-do not tie to GND trace. |
Key Features
| Feature | Design Value |
|---|---|
| Three independent PWM inputs | Enable per-channel dimming and on/off control without microcontroller firmware-ideal for simple analog-dimming systems or discrete logic control. |
| ±5% LED current accuracy | Eliminates need for factory current trimming or closed-loop feedback, reducing BOM count and assembly cost in volume lighting production. |
| 200mV current-sense reference | Reduces sense resistor power loss by >50% vs. conventional 1V references-critical for thermal management in sealed fixtures. |
| +5V regulated output (4mA) | Power local circuitry (e.g., Hall-effect current monitor, temperature sensor, or level shifter) without adding a second regulator IC. |
| Thermal shutdown with hysteresis | Prevents thermal runaway during short-circuit or overtemperature events while enabling automatic recovery when ambient cools-no manual reset required. |
Applications
| Industrial Lighting | Architectural Lighting |
|---|---|
|
Use Scenario: High-bay LED fixtures in warehouses with multi-zone dimming for energy savings and task-specific illumination. IC Role / Device Role / Timing Role: Constant-current sink driver for three independent LED zones, each controlled by separate PWM signal from building automation controller. Use Value: Enables precise lumen matching across zones and eliminates current drift over temperature-ensuring consistent light output for 50,000+ hour lifetime. |
Use Scenario: Linear LED cove lighting in commercial lobbies with RGBW mixing and smooth color transitions. IC Role / Device Role / Timing Role: Per-channel current sink for white (W) and accent (R/G/B) strings, driven by PWM from lighting controller MCU. Use Value: Delivers <1% current mismatch between channels, preserving color fidelity and eliminating visible banding in gradient effects. |
| Automotive Exterior Lighting | LCD Display Backlighting |
|
Use Scenario: Daytime running lights (DRL) and position lamps in AEC-Q100-compliant headlamp modules. IC Role / Device Role / Timing Role: Robust linear driver for high-reliability LED strings operating in -40°C to +125°C under-hood environments. Use Value: Qualified across full automotive temperature range with built-in thermal protection-meets ASIL-B functional safety requirements for non-critical lighting. |
Use Scenario: Edge-lit LCD backlight for industrial HMIs requiring uniform brightness and low EMI. IC Role / Device Role / Timing Role: Low-noise constant-current source for parallel LED strings, synchronized to display refresh timing via PWM. Use Value: Fast 1µs output switching eliminates strobing artifacts during rapid screen updates; 200mV sense voltage minimizes conducted noise into sensitive analog video circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-channel linear LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16825AUE+ | Replaces PWM inputs with 4-wire serial interface (DIN/CLK/LE/OE); adds DOUT for daisy-chaining; identical pinout and package. | Requires microcontroller firmware for configuration; enables dynamic channel reprogramming and cascaded multi-driver systems. | Select MAX16825AUE+ when centralized digital control, firmware-updatable dimming profiles, or >3-channel expansion via DOUT cascading is required. |
| AL8863-7DT-13 | Switching buck LED driver (not linear); 3-channel, 150mA/channel, 40V max output, requires external inductor and diode. | Higher efficiency (>90% vs. ~65% for linear at 24V→3.2V LED drop); generates switching noise unsuitable for EMI-sensitive displays. | Select AL8863-7DT-13 when thermal constraints prevent linear operation or input-to-LED voltage differential exceeds 10V-trade off simplicity for efficiency. |
Compared with MAX16824AUE+, MAX16825AUE+ trades direct PWM accessibility for scalable digital control, while AL8863-7DT-13 replaces linear regulation with switching topology to reduce heat-but introduces layout complexity and EMI filtering requirements absent in the MAX16824AUE+'s single-capacitor, inductor-free design.
Availability
MAX16824AUE+ is available at Aetrix Electronics and suitable for industrial lighting, architectural LED systems, and automotive exterior lighting requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX16824AUE+ 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX16824/MAX16825 product line targets high-reliability, thermally constrained LED lighting systems where simplicity, accuracy, and ruggedness outweigh switching efficiency-emphasizing linear regulation with integrated protection and auxiliary power.
FAQ
What is the maximum LED string voltage the MAX16824AUE+ can drive?
The MAX16824AUE+ outputs are rated to 36V, meaning the anode-side supply voltage for each LED string may be up to 36V above GND. This supports strings of up to ~10 white LEDs (3.2V VF each) or 12 blue LEDs (3.0V VF) at full current, provided the dropout condition (VIN − VLED − 200mV) remains within the device's thermal limits.
Can the MAX16824AUE+ operate without external current-sense resistors?
No. The MAX16824AUE+ requires an external resistor between each CSx pin and GND to set output current. The device regulates the voltage across that resistor to 200mV; removing it disables current control and risks damage. Typical values range from 1.33Ω (150mA) to 20Ω (10mA), selected per channel based on desired LED current.
Does the +5V REG output require an external capacitor?
Yes. A 1µF ceramic capacitor must be placed between the REG pin and GND, as specified in the datasheet and typical operating circuits. Omitting this capacitor causes instability, output ripple, or failure to regulate-especially under load transients or across temperature extremes.
How does thermal shutdown behave if the REG pin is shorted to ground?
If REG is shorted to GND, the thermal protection circuit ceases to function, as stated in Note 6 of the datasheet. The device will continue operating until junction temperature exceeds absolute maximum ratings, risking permanent damage. Always ensure REG is properly decoupled and not shorted during board design or testing.
Is the MAX16824AUE+ pin-compatible with the MAX16825AUE+?
Yes-the MAX16824AUE+ and MAX16825AUE+ share identical 16-pin TSSOP-EP footprints and pin assignments for all common signals (OUT1–OUT3, CS1–CS3, IN, REG, GND, EP). Only pins 7–9 (PWM1–PWM3 on MAX16824) differ from pins 7–10 on MAX16825 (DIN, CLK, LE, OE); those are NC on the opposite device, enabling direct PCB reuse with firmware-only changes.
MAX16824AUE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 6.5V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 150mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16824AUE+ FAQ
1.How can I place an order for MAX16824AUE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16824AUE+ 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 MAX16824AUE+ reliable?
The price and inventory of MAX16824AUE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16824AUE+ is usually 5 days.
3.What payment methods are accepted for MAX16824AUE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16824AUE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16824AUE+?
MAX16824AUE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16824AUE+ 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 MAX16824AUE+?
For technical support, including MAX16824AUE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16824AUE+ requirements.
6.How does Aetrix verify that MAX16824AUE+ is sourced from the original manufacturer or authorized distributors?
All MAX16824AUE+ 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 MAX16824AUE+ meets industry standards.
7.What is the process for return or replacement of MAX16824AUE+?
All MAX16824AUE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16824AUE+, 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 MAX16824AUE+ part is unused and in its original packaging.
Return procedure for MAX16824AUE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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