MAX16836_09 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator

19-4029; Rev 2; 4/09
EVAALVUAAILTAIOBNLEKIT
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
General Description
The MAX16836 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 MAX16836 is
adjusted by using an external current-sense resistor in
series with the LEDs. A dimming input allows wide-
range “pulsed” PWM operation. Wave-shaping circuitry
reduces EMI. The differential current-sense input
increases noise immunity. The MAX16836 is well suited
for applications requiring a high-voltage input and is
able to withstand automotive load-dump events up to
40V. An on-board pass element minimizes external
components while providing ±3.5% output-current
accuracy. Additional features include a 5V regulated
output and short-circuit and thermal protection.
The MAX16836 is available in a thermally enhanced,
5mm x 5mm, 16-pin TQFN package and in an 8-pin SO
package with exposed pad. The MAX16836 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
Emergency Vehicle Warning Lights
Navigation and Marine Indicators
General Lighting
Signage, Gasoline Canopies, Beacons
Typical Operating Circuit
Features
o +6.5V to +40V Operating Range
o Adjustable LED Current (35mA to 350mA)
o ±3.5% LED Current Accuracy
o High-Voltage DIM Pin for Dimming Interface
o Integrated Pass Element with Low-Dropout
Voltage (0.55V typ)
o +5V Regulated Output with 4mA Source
Capability
o Parallel Operation for LED Current > 350mA
o Differential LED Current Sense
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 Thermal Shutdown
o Output Short-Circuit Protection
o Available in Small, Thermally Enhanced,
5mm x 5mm, 16-Pin TQFN Package and in 8-Pin
SO with Exposed Pad Package
o -40°C to +125°C Operating Temperature Range
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX16836ATE+
-40°C to +125°C 16 TQFN-EP*
MAX16836ASA+
-40°C to +125°C 8 SO-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Simplified Diagram
VDIM
VIN
C1
16 15 14 13
OUT EN N.C. DIM
1 OUT
GND 12
2 IN
3 IN
MAX16836
V5 11
CS- 10
4 N.C.
CS+ 9
N.C. N.C. N.C. N.C.
5
6
7
8
D1
C2
RSENSE
+6.5V TO +40V
IN
0.1µF
EN
OUT
MAX16836
+5V REG
V5
0.1µF
CS+
PWM DIMMING
DIM
CS-
GND
LEDs
RSENSE
________________________________________________________________ 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.