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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX20090B Datasheet

High-Brightness LED Controller

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MAX20090/MAX20090B
EVALUATION KIT AVAILABLE
Automotive High-Voltage,
High-Brightness LED Controller
General Description
The MAX20090 is a single-channel high-brightness LED
(HB LED) driver for automotive front-light applications such
as high beam, low beam, daytime running lights (DRLs),
turn indicators, fog lights, and other LED lights. It can take
an input voltage from 5V to 65V and drive a string of LEDs
with a maximum output voltage of 65V.
The device senses output current at the high side of the
LED string. High-side current sensing is required to pro-
tect for shorts from the output to the ground or battery
input. It is also the most flexible scheme for driving LEDs,
allowing boost, high-side buck, SEPIC mode, or buck-
boost-mode configurations. The PWM input provides LED
dimming ratios of up to 1000:1, and the ICTRL input provides
additional analog dimming capability in the controller. The
device also includes a fault flag (FLT) that indicates open
string, shorted string, and thermal shutdown. The device
has built-in spread-spectrum modulation for improved
electromagnetic-compatibility performance. The device
can also be used in zeta and Ćuk converter configura-
tions, if necessary in some applications. The MAX20090 is
available in a space-saving (4mm x 4mm), 20-pin TQFN,
20-pin side-wettable TQFN, or a 20-pin TSSOP pack-
age and is specified to operate over the -40°C to +125°C
automotive temperature range
Applications
Automotive Exterior Lighting
High-Beam/Low-Beam/Signal/Position Lights
Daytime Running Lights (DRLs)
Fog Lights and Adaptive Front-Light Assemblies
Head-Up Displays
Commercial, Industrial, and Architectural Lighting
Ordering Information appears at end of data sheet.
Benefits and Features
High-Brightness LED Driver with a Wide Input Range
Saves Space and Cost Through Integration
• +5V to +65V Wide Input Voltage Range
• +65V Maximum Boost Output Voltage
• ICTRL Pin for Analog Dimming
Integrated High-Side Current-Sense Amplifier
200Hz On-Board Ramp Simplifies PWM Dimming
Flexible Architecture Enables Easy Design
Optimization
Configurable as Boost, High-Side Buck, SEPIC,
Buck-Boost, Zeta, and Ćuk
• Programmable Switching Frequency (200kHz to
2.2MHz)
• Spread-Spectrum Modulation to Reduce EMI Noise
Automotive Features and Robustness Improve
System Reliability
• Fault Diagnosis Through Fault Flag
• Short Circuit, Overvoltage, and Thermal Protection
• -40°C to +125°C Operating Temperature Range
Simplified Typical Operating Circuit
IN PUT
RUVEN 1
CIN
L1
IN BST
N DR V
MA X20 090
CS
PWM DIM
RRT
C2
RUVEN 2
C1
ANALOG DIM
UVEN
PWM DIM
RT
V7V
VCC
IC TR L
SGND
OVP
ISEN SE+
ISEN SE-
D IMOU T
FLT
C OM P
EP PGND
CBS T
D1
N1
RSC
10 0Ω
RCOMP
RCS_FE T
CCOMP
COUT
ROVP 1
RCS_LED
P1
ROVP 2
19-8747; Rev 5; 5/19


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX20090B Datasheet

High-Brightness LED Controller

No Preview Available !

MAX20090/MAX20090B
Simplified Schematic
Automotive High-Voltage,
High-Brightness LED Controller
IN PUT
RUVEN1
CIN
PWM DIM
RRT
RUVEN2
C2
C1
R1
IN
UVEN
PWM DIM
RT
V7V
VCC
IC TR L
R2
SGND
L1
MAX20090
PGND
BST
N DR V
CS
OVP
ISEN SE+
ISEN SE-
D IMOU T
FLT
C OM P
CBS T
RSC
10 0Ω
D1
N1
RCS_FE T
COUT
ROVP 1
RCS_LED
P1
ROVP 2
RCOMP
CCOMP
EP
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX20090B
Description High-Brightness LED Controller
Maker Maxim Integrated
PDF Download

MAX20090B Datasheet PDF






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