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Analog Devices Inc./Maxim Integrated MAX16833FAUE/V+QA
- Part No.:
- MAX16833FAUE/V+QA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16833FAUE/V+QA.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,987
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Product details
Overview
The MAX16833FAUE/V+QA 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. It enables fast PWM dimming in automotive exterior lighting systems.
For engineers reviewing the MAX16833FAUE/V+QA datasheet, MAX16833FAUE/V+QA pinout, MAX16833FAUE/V+QA application, or MAX16833FAUE/V+QA equivalent, key selection criteria include its 100kHz–1MHz programmable switching frequency, integrated high-side current sensing, 7V VCC LDO, fault-indicator output (FLT), and compatibility with external pMOS dimming for transient-free LED current control.
Technical Context
This IC implements constant-frequency peak current-mode control with externally programmable slope compensation to prevent subharmonic oscillation above 50% duty cycle. The transconductance error amplifier (GM = 2100–4900 µS) interfaces with a high-gain (6.15 V/V), low-offset (<1 mV) current-sense amplifier referenced to ISENSE+ and ISENSE−.
It features dual independent regulation paths: a 7V VCC LDO powers the NDRV gate driver, while a dedicated −7V reference powers the DIMOUT pMOS driver. UVLO thresholds (4.2V rising / 4.05V falling) and thermal shutdown (+160°C) are internally fixed, and OVP protection triggers at 1.19–1.26V on the OVP pin with 70mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 65V - supports wide-range automotive battery and industrial DC bus inputs without pre-regulation |
| Switching Frequency | 100kHz to 1MHz - set by single RT/SYNC resistor; enables optimization of magnetics size vs. EMI |
| Current-Sense Voltage | 195–203mV - precise 200mV full-scale high-side sensing minimizes power loss in sense resistor |
| NDRV Peak Current | 3A sink/source - drives high-Qg power MOSFETs directly in high-power LED applications |
| DIMOUT Drive Capability | 50mA peak pullup / 25mA peak pulldown - ensures fast turn-on/turn-off of external p-channel dimming MOSFET |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions |
| VCC LDO Output | 6.75–7.15V @ 50mA - powers gate driver with <0.35V dropout, stable across input voltage range |
Pinout & Package
MAX16833FAUE/V+QA is housed in a thermally enhanced 16-pin TSSOP package (5mm × 4.4mm) with exposed pad (EP) for PCB-level heat sinking. Pin functions are validated per Maxim's official datasheet Rev 15 (10/19).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LFRAMP) | Low-frequency ramp output | Connects to RT/SYNC via resistor to dither switching frequency for spread-spectrum EMI reduction |
| 2 (RT/SYNC) | Oscillator programming & sync input | Sets fSW (100–1000 kHz) with resistor to SGND; accepts AC-coupled external clock for synchronization |
| 4 (ICTRL) | Analog dimming control input | DC voltage (0–1.4V) linearly sets LED current; >1.4V engages internal 1.23V reference |
| 9 (DIMOUT) | pMOS gate driver output | Active-low driver pulls gate to ≤ –7.4V relative to ISENSE+ for full enhancement of external p-channel dimming FET |
| 14 (NDRV) | nMOS gate driver output | Swings rail-to-rail between VCC and PGND; delivers 3A peak to switch high-power external n-channel MOSFET |
| 11/10 (ISENSE+/ISENSE−) | High-side differential current sense | Accepts Kelvin connection across sense resistor; enables LED string positive terminal to float to IN or PGND safely |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side current sensing | Enables safe LED string grounding to either IN or PGND - eliminates risk of damage during short-circuit events |
| Fast PWM dimming with pMOS driver | DIMOUT achieves <3µs LED turn-on and <2µs turn-off times - prevents overvoltage/undervoltage transients during dimming |
| Programmable spread-spectrum dithering | LFRAMP-to-RT/SYNC resistor injection reduces peak EMI amplitude without altering average fSW |
| Robust fault protection suite | Combined short-circuit (hiccup mode), overvoltage (OVP), and thermal shutdown (160°C) with open-drain FLT indicator |
| Wide-input, high-voltage operation | 5V–65V VIN range with 70V absolute max on IN pin - supports 12V/24V/48V systems and transient ride-through |
Applications
| Automotive High-Beam Lighting | Commercial Architectural DRLs |
|---|---|
Use Scenario: High-intensity LED headlamp module requiring precise current regulation and fast PWM dimming for adaptive beam shaping. IC Role / Device Role / Timing Role: Primary LED current controller and dimming sequencer; manages NDRV switching and DIMOUT timing to synchronize LED current transitions with vehicle ECU commands. Use Value: Enables flicker-free, transient-free dimming at up to 1kHz while maintaining ±1.5% LED current accuracy across temperature and input voltage variation. | Use Scenario: Daytime running light assembly in commercial vehicle front fascia, powered from 24V chassis supply with EMI-sensitive infotainment proximity. IC Role / Device Role / Timing Role: High-voltage LED driver implementing boost topology with synchronized switching to reduce conducted EMI in shared power domains. Use Value: Spread-spectrum dithering (via LFRAMP) lowers 150kHz–108MHz EMI peaks below CISPR 25 Class 5 limits without filter redesign. |
| Industrial Machine Vision Lighting | Outdoor Streetlight LED Driver |
Use Scenario: Stroboscopic LED illumination for high-speed camera capture in factory automation, requiring microsecond-level current turn-on precision. IC Role / Device Role / Timing Role: Fast-response current regulator using high-side sensing and direct DIMOUT control to eliminate propagation delay in dimming path. Use Value: Achieves 2µs LED turn-on time from PWMDIM rising edge - enables reliable 50kSPS image capture with consistent exposure. | Use Scenario: Outdoor LED streetlight operating from 120–305VAC-derived DC bus with wide ambient temperature swing (-40°C to +85°C). IC Role / Device Role / Timing Role: Buck-boost LED driver managing variable input due to PFC stage ripple; uses high-side sensing to maintain regulation during line sags. Use Value: -40°C to +125°C junction rating and 65V max boost output ensure continuous operation during cold starts and grid surges. |
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 |
|---|---|---|---|
| MAX16833BAUE/V+ | Includes 1.64V ±2% REF output (replaces LFRAMP); no spread-spectrum capability | Preferred where analog dimming via resistive divider from REF to ICTRL is required instead of dithering | Select when stable reference voltage for ICTRL biasing is prioritized over EMI reduction |
| LM3410XSD/NOPB | Single-stage boost-only topology; no high-side sensing; 40V max input; no DIMOUT driver | Targeted at lower-voltage, cost-sensitive consumer lighting - lacks automotive-grade protection and dimming integration | Choose only for non-automotive, <40V, single-topology designs where external dimming FET control is handled separately |
Compared with MAX16833FAUE/V+QA, MAX16833BAUE/V+ trades spread-spectrum EMI reduction for a precision analog reference, while LM3410XSD/NOPB sacrifices high-voltage operation, topology flexibility, and integrated dimming drive - making MAX16833FAUE/V+QA uniquely suited for robust, multi-topology automotive LED systems.
Availability
MAX16833FAUE/V+QA is available at Aetrix Electronics and suitable for automotive exterior lighting, industrial machine vision illumination, and outdoor LED streetlight systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX16833FAUE/V+QA 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 MAX16833 family is designed specifically for high-brightness LED driver applications requiring wide input voltage range, integrated high-side current sensing, and robust fault protection in harsh environments.
FAQ
What topology configurations does the MAX16833FAUE/V+QA support?
The MAX16833FAUE/V+QA supports boost, buck-boost, SEPIC, flyback, and high-side buck topologies. Its peak current-mode architecture and high-side current-sense inputs enable flexible implementation across these configurations without requiring external level-shifting circuitry. The IC's 5V–65V input range and 65V maximum boost output make it suitable for both 12V and 48V automotive systems. Each topology must be validated with appropriate external components per Maxim's application schematics.
How does the MAX16833FAUE/V+QA achieve transient-free PWM dimming?
The MAX16833FAUE/V+QA achieves transient-free PWM dimming through its dedicated DIMOUT pin, which drives an external p-channel MOSFET in series with the LED string. DIMOUT provides fast active-low switching (≤3µs turn-on, ≤2µs turn-off) with voltage levels referenced to ISENSE+, ensuring the pMOS gate is pulled ≤–7.4V below ISENSE+ for full enhancement. This eliminates voltage spikes or droops across the LED string during dimming transitions, preserving optical stability and preventing stress on downstream optics.
What is the function of the LFRAMP pin on the MAX16833FAUE/V+QA?
The LFRAMP pin on the MAX16833FAUE/V+QA generates a low-frequency triangular ramp used for frequency dithering. When connected via an external resistor to the RT/SYNC pin, it modulates the switching frequency to implement spread-spectrum EMI reduction. This feature is exclusive to the MAX16833, MAX16833C, and MAX16833G variants. In contrast, the MAX16833B/D replace LFRAMP with a 1.64V reference output (REF), confirming that MAX16833FAUE/V+QA is a dither-capable variant.
Can the MAX16833FAUE/V+QA operate without an external p-channel MOSFET for dimming?
No - the MAX16833FAUE/V+QA requires an external p-channel MOSFET connected to the DIMOUT pin for PWM dimming functionality. DIMOUT is not a logic-level output but a high-current gate driver (50mA peak pullup) referenced to ISENSE+. Without the external pMOS, PWM dimming cannot be implemented. Analog dimming remains available via the ICTRL pin, but full-range, flicker-free dimming with fast transients depends on the external p-channel FET driven by DIMOUT.
What protection features are integrated into the MAX16833FAUE/V+QA?
The MAX16833FAUE/V+QA integrates short-circuit (hiccup mode), overvoltage (OVP input with 1.19–1.26V threshold), and thermal shutdown (+160°C) protections. Fault conditions assert the open-drain FLT pin low. It also includes UVLO (4.2V rising / 4.05V falling), CS limit comparator (406–430mV), and buck-boost short-circuit detection. These protections operate independently of external components and are fully specified across the -40°C to +125°C operating range, ensuring reliability in automotive and industrial deployments.
MAX16833FAUE/V+QA 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:
- Discontinued at Digi-Key
- 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:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16833FAUE/V+QA FAQ
1.How can I place an order for MAX16833FAUE/V+QA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16833FAUE/V+QA 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 MAX16833FAUE/V+QA reliable?
The price and inventory of MAX16833FAUE/V+QA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16833FAUE/V+QA is usually 5 days.
3.What payment methods are accepted for MAX16833FAUE/V+QA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16833FAUE/V+QA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16833FAUE/V+QA?
MAX16833FAUE/V+QA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16833FAUE/V+QA 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 MAX16833FAUE/V+QA?
For technical support, including MAX16833FAUE/V+QA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16833FAUE/V+QA requirements.
6.How does Aetrix verify that MAX16833FAUE/V+QA is sourced from the original manufacturer or authorized distributors?
All MAX16833FAUE/V+QA 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 MAX16833FAUE/V+QA meets industry standards.
7.What is the process for return or replacement of MAX16833FAUE/V+QA?
All MAX16833FAUE/V+QA units undergo pre-shipment inspection (PSI). If there is an issue with MAX16833FAUE/V+QA, 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 MAX16833FAUE/V+QA part is unused and in its original packaging.
Return procedure for MAX16833FAUE/V+QA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16833FAUE/V+QA Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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