MAX16800_09 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – High-Voltage, 350mA, Adjustable Linear High-Brightness LED (HB LED) Driver

19-3803; Rev 1; 4/09
High-Voltage, 350mA, Adjustable Linear
High-Brightness LED (HB LED) Driver
General Description
The MAX16800 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.
The output current of the MAX16800 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 dif-
ferential current-sense input increases noise immunity.
The MAX16800 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 ele-
ment minimizes external components while providing
±3.5% output current accuracy. Additional features
include a 5V regulated output and short-circuit and
thermal protection.
The MAX16800 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
TOP VIEW
Pin Configuration
12 11 10 9
N.C. 13
N.C. 14
EN 15
OUT 16
MAX16800
+
8 N.C.
7 N.C.
6 N.C.
5 N.C.
1
2
3
4
Features
♦ +6.5V to +40V Operating Range
♦ Adjustable Level (35mA to 350mA)
♦ ±3.5% Output Current Accuracy
♦ Integrated Pass Element with Low-Dropout
Voltage (0.5V typ)
♦ Output Short-Circuit Protection
♦ +5V Regulated Output with 4mA Source
Capability
♦ Thermal Shutdown
♦ Differential LED Current Sense
♦ High-Voltage Enable Pin for Dimming Interface
♦ Low Shutdown Supply Current (12μA typ)
♦ Low 204mV Current-Sense Reference Reduces
Power Losses
♦ Wave-Shaped Soft Edges Reduce Radiated EMI
During PWM Dimming
♦ Available in Small, Thermally Enhanced,
5mm x 5mm, 16-Pin TQFN Package
♦ -40°C to +125°C Operating Temperature Range
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX16800ATE+ -40°C to +125°C
16 TQFN-EP*
MAX16800ATE/V+ -40°C to +125°C
16 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.
/V denotes an automotive qualified part.
Simplified Diagram
+6.5V TO +40V
IN
0.1μF
OUT
MAX16800
+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.