MAX16835 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – High-Voltage, 350mA, Adjustable Linear High-Brightness LED Driver

19-4028; Rev 1; 5/08
High-Voltage, 350mA, Adjustable Linear
High-Brightness LED Driver
General Description
The MAX16835 current regulator operates from a 6.5V
to 40V input voltage range and delivers up to a total of
350mA to one or more strings of high-brightness LEDs
(HB LEDs). The output current of the MAX16835 is
adjusted by using an external current-sense resistor in
series with the LEDs. An enable input allows wide-
range “pulsed” dimming. Wave-shaping circuitry
reduces EMI. The differential current-sense input
increases noise immunity. The MAX16835 is well suited
for applications requiring high-voltage input and is able
to withstand automotive load-dump events up to 40V.
An on-board pass element minimizes external compo-
nents while providing ±3.5% output current accuracy.
Additional features include a 5V regulated output and
short-circuit and thermal protection.
The MAX16835 is available in a thermally enhanced,
5mm x 5mm, 16-pin TQFN package and is specified
over the automotive -40°C to +125°C temperature range.
Applications
Automotive Interior: Map, Courtesy, and Cluster
Lighting
Automotive Exterior: Tail Lights and CHMSL
Warning Lights for Emergency Vehicles
Navigation and Marine Indicators
General Illumination
Signage, Gasoline Canopies, Beacons
Features
o +6.5V to +40V Operating Range
o Adjustable LED Current (35mA to 350mA)
o ±3.5% Output Current Accuracy
o Integrated Pass Element with Low-Dropout
Voltage (0.55V typ)
o Output Short-Circuit Protection
o +5V Regulated Output with 4mA Source
Capability
o Thermal Shutdown
o Differential LED Current Sense
o High-Voltage Enable Pin for Dimming Interface
o Low Shutdown Supply Current (35µA typ)
o Low 200mV Current-Sense Reference Reduces
Power Losses
o Wave-Shaped Edges Reduce Radiated EMI During
PWM Dimming
o Available in Small, Thermally Enhanced,
5mm x 5mm, 16-Pin TQFN Package
o -40°C to +125°C Operating Temperature Range
Ordering Information
PART
TEMP RANGE
MAX16835ATE+ -40°C to +125°C
+Denotes a lead-free package.
*EP = Exposed pad.
PIN-PACKAGE
16 TQFN-EP*
TOP VIEW
Pin Configuration
12 11 10 9
N.C. 13
N.C. 14
EN 15
OUT 16
MAX16835
+
8 N.C.
7 N.C.
6 N.C.
5 N.C.
1
2
3
4
Simplified Diagram
+6.5V TO +40V
IN
0.1μF
OUT
MAX16835
+5V REG
V5
0.1μF
CS+
PWM DIMMING
EN
CS-
GND
LEDs
RSENSE
TQFN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.