MAX16807AUI+T Maxim Integrated Products, MAX16807AUI+T Datasheet

IC LED DRVR WT/RGB BCKLT 28TSSOP

MAX16807AUI+T

Manufacturer Part Number
MAX16807AUI+T
Description
IC LED DRVR WT/RGB BCKLT 28TSSOP
Manufacturer
Maxim Integrated Products
Type
Backlight, White LED, RGB (Serial Interface)r
Datasheet
1.MAX16807AUIT.pdf (19 pages)

Specifications of MAX16807AUI+T

Constant Current
Yes
Topology
Open Drain, PWM, Step-Down (Buck), SEPIC, Step-Up (Boost)
Number Of Outputs
8
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
28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
Operating Temperature
-40°C ~ 125°C
Current - Output / Channel
55mA
Internal Switch(s)
No
Operating Supply Voltage
3 V to 5.5 V
Maximum Supply Current
5 mA
Maximum Power Dissipation
2162 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 MAX16807 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 MAX16807 current-mode PWM controller
regulates the necessary voltage to the LED array.
Depending on the input voltage and LED voltage
range, it can be used with boost or buck-boost (SEPIC)
topologies. The MAX16807 features an 8V to 26.5V
input voltage range. A wide range of adjustable fre-
quency (20kHz to 1MHz) allows design optimization for
efficiency and minimum board space.
The MAX16807 LED driver includes eight open-drain,
constant-current-sinking LED driver outputs rated for
36V continuous operation. The LED current-control cir-
cuitry achieves ±3% current matching among strings
and enables paralleling of outputs for LED string cur-
rents 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 MAX16807 operates either in stand-alone mode or
with a microcontroller (µC) using an industry-standard, 4-
wire serial interface.
The MAX16807 includes overtemperature protection,
operates over the full -40°C to +125°C temperature
range, and is available in a thermally enhanced, 28-pin
TSSOP exposed paddle package.
19-0655; 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
General Description
Integrated 8-Channel LED Driver with
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
C
L
REF
REF
MAX16807
Q
R
R
T
CS
COMP
C
T
C
RTCT
D
C1
C
C2
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
R
C
C1
FB
OUT
R1
R2
V
o Eight Constant-Current Output Channels (Up to
o ±3% Current Matching Among Outputs
o Paralleling Channels Allows Higher Current per
o Output Rated for 36V Continuous Voltage
o Output-Enable Pin for PWM Dimming (Up to 30kHz)
o One Resistor Sets LED Current for All Channels
o Wide Dimming Ratio Up to 5000:1
o Low Current-Sense Reference (300mV) for High
o 8V to 26.5V Input Voltage or Higher with External
o 4-Wire Serial Interface to Control Individual
OUT
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Typical Operating Circuits continued at end of data sheet.
M AX 16807AU I+
55mA Each)
LED String
Efficiency
Biasing Devices
Output Channels
STAND-ALONE OPERATION
PA R T
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
T EM P RA N G E
Ordering Information
LEDs
Applications
PIN - PA C K A G E
28 TS S O P - E P *
Features
1

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MAX16807AUI+T Summary of contents

Page 1

... TSSOP exposed paddle package. Pin Configuration appears at end of data sheet 5.5V R ________________________________________________________________ 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. o Eight Constant-Current Output Channels (Up to 55mA Each) o ±3% Current Matching Among Outputs ...

Page 2

Integrated 8-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 (10µs ...

Page 3

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller ELECTRICAL CHARACTERISTICS (PWM CONTROLLER) (continued +15V +3V to +5.5V referenced to PGND AGND 0V; all voltages are measured ...

Page 4

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller ELECTRICAL CHARACTERISTICS (LED DRIVER) (V+ = +3V to +5.5V 0V; all voltages are measured with respect to PGND, unless otherwise noted. T AGND PGND to +125°C, ...

Page 5

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller 5V TIMING CHARACTERISTICS (V+ = +4.5V to +5.5V 0V; all voltages are measured with respect to PGND, unless otherwise noted ...

Page 6

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller 3.3V TIMING CHARACTERISTICS (V+ = +3V to < +4.5V AGND PGND to +125°C, unless otherwise noted. Typical values are +25°C.) (Notes 1, 5) ...

Page 7

Integrated 8-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 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller (V = +15V 5.5V 10kΩ Typical values are +25°C, unless otherwise noted.) A TIMING RESISTANCE vs. OSCILLATOR FREQUENCY ...

Page 9

Integrated 8-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 8-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_ VOLTAGE ...

Page 11

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller PIN NAME 1, 13, 28 N.C. No Connection. Not internally connected. Leave unconnected. 2 AGND Analog Ground 3 OUT MOSFET Driver Output OUT. Connects to the gate of the external ...

Page 12

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller ode of a string of LEDs connected in series. The con- stant-current capability 55mA per output, set for all 8 outputs by an external resistor, R device ...

Page 13

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller V+ 68W/L W/L 1.23 R 1.23V EST 995R SET Figure 1c. OUT_ Driver Internal Diagram Switch-Mode Controller Current-Mode Control Loop The advantages of current-mode control over voltage- mode control are ...

Page 14

Integrated 8-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 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller The MAX16807 also operates in a stand-alone mode (see the Typical Operating Circuits ). For use with a microcontroller, the MAX16807 features a 4-wire serial interface using DIN, CLK, LE, ...

Page 16

Integrated 8-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_ LE t LRR OUT_ CLK t CRF OUT_ CLK t CRR OUT_ Figure 4. ...

Page 17

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller Computing Power Dissipation Use the following equation to estimate the upper limit power dissipation (PD) for the MAX16807: ⎡ ∑ ⎢ PD DUTY ...

Page 18

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller OUT CS AGND 5. BYP PGND SCLK CLK MOSI DIN µC MISO DOUT LOAD LE ENABLE OE SET R ...

Page 19

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2009 Maxim Integrated Products ...

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