MAX16809ATU+T Maxim Integrated Products, MAX16809ATU+T Datasheet

IC LED DRVR WT/RGB BCKLT 38-TQFN

MAX16809ATU+T

Manufacturer Part Number
MAX16809ATU+T
Description
IC LED DRVR WT/RGB BCKLT 38-TQFN
Manufacturer
Maxim Integrated Products
Type
Backlight, White LED, RGB (Serial Interface)r
Datasheet
1.MAX16809ATU.pdf (20 pages)

Specifications of MAX16809ATU+T

Constant Current
Yes
Topology
*
Number Of Outputs
16
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
RGB, White LED
Frequency
20kHz ~ 1MHz
Voltage - Supply
8 V ~ 26.5 V
Voltage - Output
36V
Mounting Type
Surface Mount
Package / Case
38-TQFN Exposed Pad
Operating Temperature
-40°C ~ 125°C
Current - Output / Channel
55mA
Internal Switch(s)
No
Low Level Output Current
6 mA
High Level Output Current
1.8 mA
Operating Supply Voltage
3 V to 5.5 V
Maximum Supply Current
5 mA
Maximum Power Dissipation
2857 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Efficiency
-
Lead Free Status / Rohs Status
 Details
The MAX16809 is an integrated, high-efficiency white or
RGB LED driver. It is designed for LCD backlighting
and other LED lighting applications with multiple strings
of LEDs. The MAX16809’s current-mode PWM con-
troller regulates the necessary voltage to the LED array.
Depending on the input voltage and LED voltage
range, this device can be used with boost or buck-
boost (SEPIC) topologies.
The MAX16809 LED driver includes 16 open-drain, con-
stant-current-sinking LED driver outputs rated for 36V
continuous operation. The LED current-control circuitry
achieves ±3% current matching among strings and
enables paralleling of outputs for LED string currents
higher than 55mA. The output-enable pin is used for
simultaneous PWM dimming of all output channels.
Dimming frequency range is 50Hz to 30kHz and dim-
ming ratio is up to 5000:1. The constant-current outputs
are single resistor programmable and the LED current
can be adjusted up to 55mA per output channel.
The MAX16809 operates either in stand-alone mode or
with a microcontroller (μC) using an industry-standard, 4-
wire serial interface.
The MAX16809 includes overtemperature protection,
operates over the full -40°C to +125°C temperature
range, and is available in a 5mm x 7mm thermally
enhanced, 38-pin TQFN exposed paddle package.
19-0656; Rev 2; 8/09
Pin Configuration appears at end of data sheet.
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.
Switch-Mode Boost and SEPIC Controller
________________________________________________________________ Maxim Integrated Products
Integrated 16-Channel LED Driver with
General Description
3V TO 5.5V
V
IN
R
SET
C
BYP
C
IN
V
V+
PGND
LE
DIN
CLK
DOUT
OE
SET
OUT CS AGND
CC
L
C
REF
REF
MAX16809
Q1
R
R
CS
T
COMP
C
RTCT
C1
C
C2
C
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
T
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
R
C
C1
FB
OUT
R1
R2
V
OUT
♦ 16 Constant-Current Output Channels (Up to
♦ ±3% Current Matching Among Outputs
♦ Paralleling Channels Allows Higher Current per
♦ Outputs Rated for 36V Continuous Voltage
♦ Output-Enable Pin for PWM Dimming (Up to 30kHz)
♦ One Resistor Sets LED Current for All Channels
♦ Wide Dimming Ratio Up to 5000:1
♦ Low Current-Sense Reference (300mV) for High
♦ 8V to 26.5V Input Voltage or Higher with External
♦ 4-Wire Serial Interface to Control Individual
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
MAX16809ATU+
55mA Each)
LED String
Efficiency
Biasing Devices
Output Channels
Typical Operating Circuits continued at end of data sheet.
STAND-ALONE OPERATION
PART
LCD White or RGB LED Backlighting:
Ambient, Mood, and Accent Lighting
LCD TVs, Desktop, and Notebook Panels
Automotive Navigation, Heads-Up,
and Infotainment Displays
Industrial and Medical Displays
Typical Operating Circuits
-40°C to +125°C
Ordering Information
TEMP RANGE
LEDs
Applications
PIN-PACKAGE
Features
38 TQFN-EP*
1

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MAX16809ATU+T Summary of contents

Page 1

... CLK DOUT OE SET R SET ________________________________________________________________ Maxim Integrated Products 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. ♦ 16 Constant-Current Output Channels (Up to 55mA Each) ♦ ±3% Current Matching Among Outputs ♦ Paralleling Channels Allows Higher Current per LED String ♦ ...

Page 2

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller ABSOLUTE MAXIMUM RATINGS V to AGND..........................................................-0.3V to +30V CC Current into V (V > 24V) .............................................30mA PGND..............................................................-0.3V to +6V OUT to AGND.............................................-0. OUT Current ...

Page 3

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller ELECTRICAL CHARACTERISTICS (PWM CONTROLLER) (continued +15V +3V to +5.5V referenced to PGND AGND, AGND = PGND = 0V; all voltages are measured ...

Page 4

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller ELECTRICAL CHARACTERISTICS (LED DRIVER) (V+ = +3V to +5.5V, AGND = PGND = 0V; all voltages are measured with respect to PGND, unless otherwise noted +125°C, unless otherwise ...

Page 5

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller 5V TIMING CHARACTERISTICS (V+ = +4.5V to +5.5V, AGND = PGND = 0V; all voltages are measured with respect to PGND, unless otherwise noted ...

Page 6

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller 3.3V TIMING CHARACTERISTICS (V+ = +3V to < +4.5V, AGND = PGND = 0V; all voltages are measured with respect to PGND, unless otherwise noted ...

Page 7

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller (V = +15V 5.5V 10kΩ Typical values are +25°C, unless otherwise noted.) A BOOTSTRAP UVLO vs. TEMPERATURE 10 ...

Page 8

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller (V = +15V 5.5V 10kΩ Typical values are +25°C, unless otherwise noted.) A CURRENT-SENSE TRIP THRESHOLD vs. TEMPERATURE ...

Page 9

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller (V = +15V 5.5V 10kΩ Typical values are +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE ...

Page 10

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller (V = +15V 5.5V 10kΩ Typical values are +25°C, unless otherwise noted.) A OUT_ _ CURRENT vs. OUT_ ...

Page 11

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller PIN NAME 1, 31, 32, N.C. No Connection. Not internally connected. Leave unconnected. 36 Error-Amplifier Inverting Input 3 COMP Error-Amplifier Output 4–11 OUT8–OUT15 LED Driver Outputs. OUT8–OUT15 ...

Page 12

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller cathode of a string of LEDs connected in series. The constant-current capability 55mA per output, set for all 16 outputs by an external resistor, R device can ...

Page 13

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller V+ 68W/L W/L 1.23 R 1.23V EST 945R SET Figure 1b. OUT_ _ Driver Internal Diagram Switch-Mode Controller Current-Mode Control Loop The advantages of current-mode control over voltage- mode control ...

Page 14

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller The oscillator frequency is then OSC + Reference Output REF reference output that can source 20mA. Bypass REF to ...

Page 15

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller The MAX16809 also operates in a stand-alone mode (see the Typical Operating Circuits ). For use with a microcontroller, the MAX16809 features a 4-wire serial interface using DIN, CLK, LE, ...

Page 16

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller LE CLK DIN DOUT OE OUT_ _ Figure 3. 4-Wire Serial-Interface Timing Diagram LE t LRF OUT_ LRR OUT_ _ CLK t CRF OUT_ _ CLK t ...

Page 17

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller Stand-Alone Operation In stand-alone operation, the MAX16809 does not use the 4-wire interface (see the Typical Operating Circuits ). Connect DIN and and provide at least 16 ...

Page 18

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller OUT CS AGND COMP 5. BYP PGND MAX16809 SCLK CLK MOSI DIN μC MISO DOUT ...

Page 19

Integrated 16-Channel LED Driver with Switch-Mode Boost and SEPIC Controller Pin Configuration TOP VIEW N.C. 32 AGND 33 OUT MAX16809 N.C. 36 REF 37 ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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