EVALUATION KIT AVAILABLE
Integrated, 4-Channel, High-Brightness
LED Driver with High-Voltage DC-DC Controller
and Battery Disconnect
The MAX16813 high-efficiency, high-brightness LED (HB
LED) driver provides four integrated LED current-sink
channels. An integrated current-mode switching control-
ler drives a DC-DC converter that provides the neces-
sary voltage to multiple strings of HB LEDs. The device
accepts a wide 4.75V to 40V input voltage range and
withstands direct automotive load-dump events. The
wide input range allows powering HB LEDs for small- to
medium-sized LCD displays in automotive and general
An internal current-mode switching DC-DC controller
supports boost or SEPIC topologies and operates in an
adjustable frequency range between 200kHz and 2MHz.
An integrated spread-spectrum mode helps reduce EMI.
Current-mode control with programmable slope compen-
sation provides fast response and simplifies loop compen-
sation. An adaptive output-voltage control scheme mini-
mizes power dissipation in the LED current-sink paths.
The device has a separate p-channel drive (PGATE) pin
that is used for output undervoltage protection. Whenever
the output falls below the threshold, the external
p-MOSFET is latched off, disconnecting the input source.
Cycling the EN or the input supply is required to restart
the converter. The external p-MOSFET is off when the EN
pin is below 0.3V (typ). The shutdown current is 1µA (typ)
at an input voltage of 12V.
The device consists of four identical linear current-sink
channels, adjustable from 20mA to 150mA with an
accuracy of ±3% using a single external resistor. Multiple
channels can be connected in parallel to achieve higher
current per LED string. The device also features a unique
pulsed dimming control through a logic input (DIM),
with minimum pulse width as low as 500ns. Protection
features include output overvoltage, open-LED detection
and protection, programmable shorted LED detection and
protection, output undervoltage protection and detection,
and overtemperature protection. The device operates
over the -40°C to +125°C automotive temperature range.
The MAX16813 is available in 20-pin (6.5mm x 4.4mm)
TSSOP and 20-pin (4mm x 4mm) TQFN packages.
Benefits and Features
●● 4-Channel Linear LED Current Sinks with Internal
MOSFETs Independently Drive Multiple LED Strings
• Full-Scale LED Current Adjustable from 20mA
• Drives 1 to 4 LED Strings
• 10000:1 PWM Dimming at 200Hz
●● Flexible Current-Mode Architecture Supports a Wide
Range of Applications While Minimizing Interference
• Boost or SEPIC Current-Mode DC-DC Controller
• 200kHz to 2MHz Programmable Switching
• External Switching-Frequency Synchronization
• Spread-Spectrum Mode
●● Protection Features Enhance Fault Detection and
• Output-to-Ground Undervoltage Protection
• Open-Drain Fault-Indicator Output
• Open-LED and LED-Short Detection and
• Overtemperature Protection
●● Adaptive Output-Voltage Optimization to Minimize
• Less than 2µA Shutdown Current
●● Automotive Displays LED Backlights
●● Automotive RCL, DRL, Front Position, and Fog Lights
●● LCD TV and Desktop Display LED Backlights
●● Architectural, Industrial, and Ambient Lighting
TEMP RANGE PIN-PACKAGE
-40°C to +125°C 20 TQFN-EP*
MAX16813ATP/V+ -40°C to +125°C 20 TQFN-EP*
-40°C to +125°C 20 TSSOP-EP*
MAX16813AUP/V+ -40°C to +125°C 20 TSSOP-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
/V denotes an automotive qualified part.
19-6713; Rev 4; 3/16