MAX6971AUG+ Maxim Integrated Products, MAX6971AUG+ Datasheet

IC LED DRIVER LINEAR 24-TSSOP

MAX6971AUG+

Manufacturer Part Number
MAX6971AUG+
Description
IC LED DRIVER LINEAR 24-TSSOP
Manufacturer
Maxim Integrated Products
Type
Linear (Serial Interface)r
Datasheet

Specifications of MAX6971AUG+

Constant Current
Yes
Topology
16-Bit Shift Register, Open Drain, PWM
Number Of Outputs
16
Internal Driver
Yes
Type - Primary
General Purpose
Voltage - Supply
3 V ~ 5.5 V
Voltage - Output
36V
Mounting Type
Surface Mount
Package / Case
24-TSSOP
Operating Temperature
-40°C ~ 125°C
Current - Output / Channel
55mA
Internal Switch(s)
No
Number Of Segments
32
Low Level Output Current
60000 uA
Operating Supply Voltage
3 V to 5.5 V
Maximum Supply Current
25000 uA
Maximum Power Dissipation
975 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Frequency
-
Efficiency
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX6971 serial-interfaced LED driver provides 16
open-drain, constant-current-sinking LED driver outputs
rated at 36V. The MAX6971 operates from a 3V to 5.5V
supply. The MAX6971 supply and the LEDs’ supply or
supplies can power up in any order. The constant-cur-
rent outputs are programmed together to up to 55mA
using a single external resistor. The MAX6971 operates
with a 25Mb, industry-standard, 4-wire serial interface.
The MAX6971 uses the industry-standard, shift-register-
plus-latch-type serial interface. The driver accepts data
shifted into a 16-bit shift register using data input DIN
and clock input CLK. Input data appears at the DOUT
output 16 clock cycles later to allow cascading of multi-
ple MAX6971s. The latch-enable input, LE, loads the 16
bits of shift register data into a 16-bit output latch to set
which LEDs are on and which are off. The output-
enable, OE, gates all 16 outputs on and off, and is fast
enough to be used as a PWM input for LED intensity
control.
For applications requiring LED fault detection, refer to
the MAX6983, which automatically detects open-circuit
LEDs.
For safety-related applications requiring a watchdog
timer, refer to the MAX6983, which includes a fail-safe
feature that blanks the display if the serial interface
becomes inactive for more than 1s.
The MAX6971 is one of a family of 12 shift-register-plus-
latch-type LED drivers. The family includes 8-port and
16-port types, with 5.5V- or 36V-rated LED outputs, with
and without open-circuit LED detection and watchdog.
All versions operate from a 3V to 5.5V supply, and are
specified over the -40°C to +125°C temperature range.
19-3808; Rev 1; 10/07
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.
Variable Message Signs
Marquee Displays
Point-of-Order Signs
Traffic Signs
Gaming Features
Architectural Lighting
16-Port, 36V Constant-Current LED Driver
________________________________________________________________ Maxim Integrated Products
General Description
Applications
♦ 25Mb, Industry-Standard, 4-Wire Serial Interface
♦ 3V to 5.5V Logic Supply
♦ 16 Constant-Current LED Outputs Rated at 36V
♦ Up to 55mA Continuous Current per Output
♦ Output Current Programmed by Single Resistor
♦ 3% Current Matching Between Outputs
♦ 6% Current Matching Between ICs
♦ High-Dissipation, 24-Pin Packages
♦ -40°C to +125°C Temperature Range
Typical Application Circuit and Selector Guide appear at
end of data sheet.
MAX6971AUG
MAX6971ANG
TOP VIEW
PART
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
GND
CLK
DIN
LE
-40°C to +125°C
-40°C to +125°C
10
11
12
1
2
3
4
5
6
7
8
9
TEMP RANGE
Ordering Information
TSSOP/PDIP
MAX6971AUG
MAX6971ANG
Pin Configuration
24
23
22
21
20
19
18
17
16
15
14
13
PIN-PACKAGE
24 TSSOP
24 Narrow PDIP
V+
SET
DOUT
OE
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
Features
1

Related parts for MAX6971AUG+

MAX6971AUG+ Summary of contents

Page 1

... Marquee Displays Point-of-Order Signs Traffic Signs Gaming Features Architectural Lighting ________________________________________________________________ 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. ♦ 25Mb, Industry-Standard, 4-Wire Serial Interface ♦ 5.5V Logic Supply ♦ 16 Constant-Current LED Outputs Rated at 36V ♦ ...

Page 2

Constant-Current LED Driver ABSOLUTE MAXIMUM RATINGS Voltage with respect to GND. V+ ............................................................................-0.3V to +6V OUT_ .....................................................................-0.3V to +40V DIN, CLK, LE, OE, SET ................................-0.3V to (V+ + 0.3V) DOUT Current ..................................................................±10mA OUT_ Sink Current .............................................................60mA Total GND ...

Page 3

Constant-Current LED Driver 5V TIMING CHARACTERISTICS (Typical Operating Circuit 4.5V to 5.5V, T PARAMETER SYMBOL CLK Clock Period CLK Pulse-Width High CLK Pulse-Width Low DIN Setup Time DIN Hold Time DOUT Propagation Delay DOUT Rise and ...

Page 4

Constant-Current LED Driver 3.3V TIMING CHARACTERISTICS (Typical Operating Circuit 5.5V, T PARAMETER SYMBOL CLK Clock Period CLK Pulse-Width High CLK Pulse-Width Low DIN Setup Time DIN Hold Time DOUT Propagation Delay DOUT Rise and ...

Page 5

Constant-Current LED Driver (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE (INTERFACE IDLE, ALL OUTPUTS ON 360Ω) SET +85° +125° ...

Page 6

Constant-Current LED Driver PIN NAME 1 GND Ground 2 DIN Serial-Data Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge. 3 CLK Serial-Clock Input. Data is loaded into the internal 16-bit shift register ...

Page 7

Constant-Current LED Driver Detailed Description The MAX6971 LED driver comprises a 4-wire serial interface driving 16 constant-current-sinking, open- drain output ports. The outputs drive LEDs in either static or multiplex applications (Figure 1). The constant- current outputs are ...

Page 8

Constant-Current LED Driver LE t LRF OUT_ LE t LRR OUT_ CLK t CRF OUT_ CLK t CRR OUT_ Figure 3. LE and CLK to OUT_ Timing Table 1. 4-Wire Serial-Interface Truth Table SHIFT-REGISTER SERIAL CLOCK CONTENTS DATA ...

Page 9

Constant-Current LED Driver Applications Information Selecting External Component R LED Output Current The MAX6971 uses an external resistor, R LED current for outputs OUT0–OUT15. The minimum allowed value 327.3Ω, which sets the output SET currents ...

Page 10

Constant-Current LED Driver NUMBER OF PART OUTPUTS MAX6968 MAX6977 8 MAX6978 MAX6970 8 MAX6981 MAX6980 MAX6969 16 MAX6979 MAX6971 16 MAX6983 +5V MAX6971 μC V+ OUT0 SCLK CLK OUT1 OUT2 MOSI DIN OUT3 OUT4 MISO DOUT OUT5 OUT6 ...

Page 11

Constant-Current LED Driver (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, TSSOP 4.40mm BODY 1 21-0066 I 1 ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Heaney Package Information (continued registered trademark of Maxim Integrated Products, Inc ...

Related keywords