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MAX16834ATP/V+

Description
High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size245KB,23 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX16834ATP/V+ Overview

High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver

MAX16834ATP/V+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFN
package instructionHVQCCN, LCC20,.16SQ,20
Contacts20
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time7 weeks
Samacsys DescriptiHigh-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Drive
Interface integrated circuit typeLED DISPLAY DRIVER
JESD-30 codeS-XQCC-N20
length4 mm
Humidity sensitivity level1
Multiplex display functionNO
Number of functions1
Number of segments1
Number of terminals20
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC20,.16SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply12 V
Certification statusNot Qualified
Filter levelAEC-Q100
Maximum seat height0.8 mm
Maximum supply voltage28 V
Minimum supply voltage4.75 V
Nominal supply voltage12 V
surface mountYES
technologyBICMOS
Temperature levelAUTOMOTIVE
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width4 mm
EVALUATION KIT AVAILABLE
MAX16834
High-Power LED Driver with Integrated
High-Side LED Current Sense and
PWM Dimming MOSFET Driver
Benefits and Features
• 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 V
IN
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
General Description
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 con-
troller, 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-fre-
quency HB LED driver with wide-range dimming control.
The MAX16834 features constant-frequency peak cur-
rent-mode control with programmable slope compensa-
tion to control the duty cycle of the PWM controller.
A dimming driver designed to drive an external n-chan-
nel MOSFET in series with the LED string provides
wide-range dimming control up to 20kHz. In addition to
PWM dimming, the MAX16834 provides analog dim-
ming 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 boost-
buck. Additional features include external enable/
disable input, an on-chip oscillator, fault indicator out-
put (FLT) for LED open/short or overtemperature condi-
tions, 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 thermal-
ly enhanced 20-pin TSSOP-EP package and is specified
over the automotive -40°C to +125°C temperature range.
Simplified Application Circuit
V
IN
BOOST LED DRIVER
LED+
IN
NDRV
LEDs
ON
OFF
ANALOG
DIM
MAX16834
PWMDIM
REFI
PGND
CS
DIMOUT
SENSE+
LED-
Applications
• Single-String LED LCD Backlighting
• Automotive Rear and Front Lighting
• Projection System RGB LED Light Sources
• Architectural and Decorative Lighting (MR16, M111)
• Spot and Ambient Lights
• DC-DC Boost/Boost-Buck Converters
Ordering Information and Pin Configurations appear at end
of data sheet.
19-4235; Rev 5; 1/15

MAX16834ATP/V+ Related Products

MAX16834ATP/V+ MAX16834AUP/V+
Description High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver
Is it lead-free? Lead free Lead free
Is it Rohs certified? conform to conform to
Maker Maxim Maxim
Parts packaging code QFN TSSOP
package instruction HVQCCN, LCC20,.16SQ,20 HTSSOP, TSSOP20,.25
Contacts 20 20
Reach Compliance Code compli compli
ECCN code EAR99 EAR99
Factory Lead Time 7 weeks 6 weeks
Samacsys Descripti High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Drive High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Drive
Interface integrated circuit type LED DISPLAY DRIVER LED DISPLAY DRIVER
JESD-30 code S-XQCC-N20 R-PDSO-G20
length 4 mm 6.5 mm
Humidity sensitivity level 1 1
Multiplex display function NO NO
Number of functions 1 1
Number of segments 1 1
Number of terminals 20 20
Maximum operating temperature 125 °C 125 °C
Minimum operating temperature -40 °C -40 °C
Package body material UNSPECIFIED PLASTIC/EPOXY
encapsulated code HVQCCN HTSSOP
Encapsulate equivalent code LCC20,.16SQ,20 TSSOP20,.25
Package shape SQUARE RECTANGULAR
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED
power supply 12 V 12 V
Certification status Not Qualified Not Qualified
Filter level AEC-Q100 AEC-Q100
Maximum seat height 0.8 mm 1.1 mm
Maximum supply voltage 28 V 28 V
Minimum supply voltage 4.75 V 4.75 V
Nominal supply voltage 12 V 12 V
surface mount YES YES
technology BICMOS BICMOS
Temperature level AUTOMOTIVE AUTOMOTIVE
Terminal form NO LEAD GULL WING
Terminal pitch 0.5 mm 0.65 mm
Terminal location QUAD DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED
width 4 mm 4.4 mm
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