Products
MAX16834
PRODUCTIONHigh-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver
Flexible HB LED Driver Supports Green Technology for LED Lighting, Display Backlighting, and Display Projection
- Part Models
- 10
- 1ku List Price
- Starting From $3.16
Viewing:
Overview
- Integration Minimizes BOM for High-Brightness LED Driver with a Wide Dimming Range Saving Space and Cost
- Constant-Frequency, Peak Current-Mode Control with Programmable Slope Compensation
- Integrated PWM Dimming MOSFET Driver
- 3000:1 PWM Dimming/Analog Dimming
- Integrated High-Side Current-Sense Amplifier for LED Current Sense in Boost-Buck Converter
- Internal 7V Low-Dropout Regulator
- Simple Optimization for Efficiency, Board Space and Input Operating Range
- Supports Boost, Buck-Boost, SEPIC, and High-Side Buck Topologies
- 100kHz to 1MHz Programmable High-Frequency Operation
- External Clock Synchronization Input
- Wide Input Operating Voltage Range (4.75V to 28V)
- Works for Input Voltage > 28V with External Voltage Clamp on VIN for Boost Converter
- 20-Pin TQFN-EP and TSSOP-EP Packages
- Protection Features Increase System Reliability
- Programmable UVLO
- Programmable True Differential Overvoltage Protection
- Fault Output (FLT) for Overvoltage, Overcurrent, and Thermal-Warning Faults
The MAX16834 is a current-mode high-brightness LED (HB LED) driver for boost, boost-buck, SEPIC, and high-side buck topologies. In addition to driving an n-channel power MOSFET switch controlled by the switching controller, it also drives an n-channel PWM dimming switch to achieve LED PWM dimming. The MAX16834 integrates all the building blocks necessary to implement a fixed-frequency HB LED driver with wide-range dimming control. The MAX16834 features constant-frequency peak current-mode control with programmable slope compensation to control the duty cycle of the PWM controller.
A dimming driver designed to drive an external n-channel MOSFET in series with the LED string provides wide-range dimming control up to 20kHz. In addition to PWM dimming, the MAX16834 provides analog dimming using a DC input at REFI. The programmable switching frequency (100kHz to 1MHz) allows design optimization for efficiency and board space reduction. A single resistor from RT/SYNC to ground sets the switching frequency from 100kHz to 1MHz while an external clock signal at RT/SYNC disables the internal oscillator and allows the MAX16834 to synchronize to an external clock. The MAX16834's integrated high-side current-sense amplifier eliminates the need for a separate high-side LED current-sense amplifier in boost-buck applications.
The MAX16834 operates over a wide supply range of 4.75V to 28V and includes a 3A sink/source gate driver for driving a power MOSFET in high-power LED driver applications. It can also operate at input voltages greater than 28V in boost configuration with an external voltage clamp. The MAX16834 is also suitable for DC-DC converter applications such as boost or buck-boost. Additional features include external enable/disable input, an on-chip oscillator, fault indicator output (active-low FLT) for LED open/short or overtemperature conditions, and an overvoltage protection sense input (OVP+) for true overvoltage protection.
The MAX16834 is available in a thermally enhanced 4mm x 4mm, 20-pin TQFN-EP package and in a thermally enhanced 20-pin TSSOP-EP package and is specified over the automotive -40°C to +125°C temperature range.
Applications
- Architectural and Decorative Lighting (MR16, MR111)
- Automotive Rear and Front Lighting
- DC-DC Boost/Boost-Buck Converters
- Projection System RGB LED Light Sources
- Single-String LED LCD Backlighting
- Spot and Ambient Lights
Documentation
Data Sheet 1
Technical Articles 8
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX16834AGP/VY+ | Quad Flatpack, Dimple Leads | ||
| MAX16834AGP/VY+T | Quad Flatpack, Dimple Leads | ||
| MAX16834ATP+ | LFCSP | ||
| MAX16834ATP+T | LFCSP | ||
| MAX16834ATP/V+ | LFCSP | ||
| MAX16834ATP/V+T | LFCSP | ||
| MAX16834AUP+ | TSSOP_4.4 / TSSOP_6.1 | ||
| MAX16834AUP+T | TSSOP_4.4 / TSSOP_6.1 | ||
| MAX16834AUP/V+ | TSSOP_4.4 / TSSOP_6.1 | ||
| MAX16834AUP/V+T | TSSOP_4.4 / TSSOP_6.1 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 25, 2015 - 1426 ASSEMBLY |
||
| MAX16834AGP/VY+T | PRODUCTION | |
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX16834ATP+ | PRODUCTION | |
| MAX16834ATP+T | PRODUCTION | |
|
Apr 20, 2026 - 2571D PIN/ERRATA |
||
| MAX16834ATP+T | PRODUCTION | |
|
Jun 18, 2021 - 2161 ASSEMBLY |
||
| MAX16834ATP/V+ | PRODUCTION | |
| MAX16834ATP/V+T | PRODUCTION | |
|
Oct 13, 2017 - 1673 ASSEMBLY |
||
| MAX16834ATP/V+ | PRODUCTION | |
| MAX16834ATP/V+T | PRODUCTION | |
|
May 11, 2022 - 2236N ASSEMBLY |
||
| MAX16834AUP+ | PRODUCTION | |
| MAX16834AUP+T | PRODUCTION | |
|
Dec 11, 2018 - 1754N ASSEMBLY |
||
| MAX16834AUP+ | PRODUCTION | |
| MAX16834AUP+T | PRODUCTION | |
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX16834AUP+T | PRODUCTION | |
|
Jul 13, 2022 - 2236A ASSEMBLY |
||
| MAX16834AUP/V+ | PRODUCTION | |
| MAX16834AUP/V+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LED Drivers 4 | ||
| MAX16826 | PRODUCTION | Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection |
| MAX16820 | PRODUCTION | 2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming |
| MAX16832 | PRODUCTION | 2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense |
| MAX16831 | NOT RECOMMENDED FOR NEW DESIGNS | High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control |
Tools & Simulations
SPICE Model 1
Evaluation Kits
Evaluation Kit for the MAX16834
Latest Discussions
No discussions on MAX16834 yet. Have something to say?
Start a Discussion on EngineerZone®