Rainbow Electronics MAX16823 - Manual

General Description
The MAX16823 three-channel LED driver operates from a
5.5V to 40V input voltage range and delivers up to 70mA
per channel to one or more strings of high-brightness
LEDs (HBLEDs). Each channel’s current is programmable
using an external current-sense resistor in series with the
LEDs. Three DIM inputs allow a wide range of indepen-
dent pulsed dimming in addition to providing the on and
off control of the outputs. Wave-shaping circuitry reduces
EMI while providing fast turn-on and turn-off times.
The MAX16823 is well suited for automotive applications
requiring a high-voltage input and is able to withstand
load-dump events up to 45V. On-board pass elements
minimize external components while providing ±5% LED
current accuracy. Additional features include an active-
high, open-drain LEDGOOD output for open LED detec-
tion, a +3.4V (±5%) regulated output with 4mA output
current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x
5mm, 16-pin TQFN-EP and 16–pin TSSOP-EP packages
and is specified over the -40°C to +125°C automotive
temperature range.
Applications
Automotive Exterior: Rear Combination Lights
(RCLs), CHMSL
Automotive Interior: RGB Ambient Lighting,
Cluster Lighting, and LCD Backlighting
Emergency Vehicle Warning Lights
Navigation and Marine Indicators
Architectural and Industrial Lighting
Features
♦ 5.5V to 40V Operating Range
♦ Adjustable Constant Output Current
(5mA to 70mA and Up to 2A with External BJT)
♦ ±5% Output Current Accuracy
♦ Open LED Detection
♦ Three Independent High-Voltage DIM Inputs
♦ Three Integrated Pass Elements with Low
Dropout Voltage (0.7V max)
♦ Undervoltage Lockout
♦ Output Short-Circuit Protection
♦ 3.4V Voltage Regulator with 4mA Capability
♦ Accurate, Low 203mV Current Sense
♦ Overtemperature Shutdown
♦ -40°C to +125°C Operating Temperature Range
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
________________________________________________________________ Maxim Integrated Products 1
CS1 CS2 CS3
OUT3
CS1
CS2
CS3
GND
LEDGOOD
DIM2
DIM1
V IN
C IN
IN
IN
IN
R LEDGOOD
C LGC
REG
C REG
LGC
DIM3
REG
OUT2
OUT1
MAX16823
Ordering Information
Typical Operating Circuit
19-0733; Rev 0; 1/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations appear at end of data sheet.
PART TEMP RANGE
PIN-
PACKAGE PKG
CODE
MAX16823ATE+* -40°C to +125°C 16 TQFN-EP** T1655-3
MAX16823AUE+ -40°C to +125°C 16 TSSOP-EP** U16E-3
+ Denotes a lead-free package.
* Future product—contact factory for availability.
** EP = Exposed pad.