Maxim MAX6978 16-port, 36v constant-current led driver Datasheet

19-3808; Rev 0; 7/05
16-Port, 36V Constant-Current LED Driver
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-current 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-registerplus-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 multiple 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 outputenable, 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-pluslatch-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.
Applications
Variable Message Signs
Features
♦ 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
Ordering Information
PART
TEMP RANGE
-40°C to +125°C
24 TSSOP
MAX6971ANG
-40°C to +125°C
24 Narrow PDIP
Typical Application Circuit and Selector Guide appear at
end of data sheet.
Pin Configuration
TOP VIEW
GND 1
24 V+
DIN 2
23 SET
CLK 3
22 DOUT
LE 4
OUT0 5
Marquee Displays
PIN-PACKAGE
MAX6971AUG
21 OE
MAX6971AUG
MAX6971ANG
20 OUT15
OUT1 6
19 OUT14
Point-of-Order Signs
OUT2 7
18 OUT13
Traffic Signs
OUT3 8
17 OUT12
Gaming Features
OUT4 9
16 OUT11
Architectural Lighting
OUT5 10
15 OUT10
OUT6 11
14 OUT9
OUT7 12
13 OUT8
*Future product—contact factory for availability.
TSSOP/PDIP
________________________________________________________________ Maxim Integrated Products
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.
1
MAX6971
General Description
MAX6971
16-Port, 36V 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 Current ...........................................................960mA
Continuous Power Dissipation (TA = +70°C)
24-Pin TSSOP (derate 12.2mW/°C over +70°C) ..........975mW
24-Pin PDIP (derate 13.3mW/°C over +70°C)............1067mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, V+ = 3V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 5V, TA = +25°C.)
(Note 1)
PARAMETER
Operating Supply Voltage
Output Voltage
SYMBOL
CONDITIONS
V+
MIN
TYP
MAX
UNITS
5.5
V
36
V
5.7
8
mA
3.0
VOUT
Standby Current
(Interface Idle, All Output Ports
High Impedance, RSET = 360Ω)
I+
All logic inputs at V+ or GND, DOUT
unloaded
Standby Current
(Interface Running, All Output
Ports High Impedance,
RSET = 360Ω)
I+
fCLK = 5MHz, OE = V+, DIN and LE = V+
or GND, DOUT unloaded
6
8.5
mA
Supply Current
(Interface Idle, All Output Ports
Active Low, RSET = 360Ω)
I+
All logic inputs at V+ or GND,
DOUT unloaded
18
25
mA
Input High Voltage
DIN, CLK, LE, OE
VIH
Input Low Voltage
DIN, CLK, LE, OE
VIL
Hysteresis Voltage
DIN, CLK, LE, OE
∆VI
Input Leakage Current
DIN, CLK, LE, OE
0.7 x
V+
V
0.3 x
V+
0.8
IIH, IIL
-1
Output High-Voltage DOUT
VOH
ISOURCE = 4mA
Output Low Voltage
VOL
ISINK = 4mA
Output Current OUT_
IOUT
V+ = 3V to 5.5V, VOUT = 0.8V to 2.5V,
RSET = 360Ω
Output Leakage Current OUT_
ILEAK
OE = V+
+1
µA
V
50
Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.
2
V
V+
- 0.5V
37
V
_______________________________________________________________________________________
0.5
V
61
mA
1
µA
16-Port, 36V Constant-Current LED Driver
(Typical Operating Circuit, V+ = 4.5V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLK Clock Period
tCP
40
ns
CLK Pulse-Width High
tCH
19
ns
CLK Pulse-Width Low
tCL
19
ns
DIN Setup Time
tDS
4
ns
DIN Hold Time
tDH
8
ns
DOUT Propagation Delay
tDO
DOUT Rise and Fall Time
tDR, tDF
LE Pulse-Width High
LE Setup Time
12
CDOUT = 10pF, 20% to 80%
tLW
32
10
20
tLS
ns
ns
ns
10
ns
LE Rising to OUT_ Rising Delay
tLRR
(Note 3)
100
ns
LE Rising to OUT_ Falling Delay
tLRF
(Note 3)
300
ns
CLK Rising to OUT_ Rising Delay
tCRR
(Note 3)
100
ns
CLK Rising to OUT_ Falling Delay
tCRF
(Note 3)
310
ns
OE Rising to OUT_ Rising Delay
tOEH
(Note 3)
100
ns
OE Falling to OUT_ Falling Delay
tOEL
(Note 3)
320
ns
LED Output OUT_ Turn-On Fall
Time
tf
80% to 20%, pullup resistor = 65Ω
120
ns
LED Output OUT_ Turn-Off Rise
Time
tr
20% to 80%, pullup resistor = 65Ω
120
ns
Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: See Figure 3.
Note 3: A 65Ω pullup resistor connected from OUT_ to 5.5V.
_______________________________________________________________________________________
3
MAX6971
5V TIMING CHARACTERISTICS
3.3V TIMING CHARACTERISTICS
(Typical Operating Circuit, V+ = 3V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLK Clock Period
tCP
52
ns
CLK Pulse-Width High
tCH
24
ns
CLK Pulse-Width Low
tCL
24
ns
DIN Setup Time
tDS
4
ns
DIN Hold Time
tDH
8
DOUT Propagation Delay
tDO
12
DOUT Rise and Fall Time
tDR, tDF
ns
50
CDOUT = 10pF, 20% to 80%
ns
12
ns
LE Pulse-Width High
tLW
20
ns
LE Setup Time
tLS
15
ns
LE Rising to OUT_ Rising Delay
tLRR
(Note 3)
120
ns
LE Rising to OUT_ Falling Delay
tLRF
(Note 3)
310
ns
CLK Rising to OUT_ Rising Delay
tCRR
(Note 3)
120
ns
CLK Rising to OUT_ Falling Delay
tCRF
(Note 3)
330
ns
OE Rising to OUT_ Rising Delay
tOEH
(Note 3)
120
ns
OE Falling to OUT_ Falling Delay
tOEL
(Note 3)
330
ns
LED Output OUT_ Turn-On Fall
Time
tf
80% to 20% (Note 3)
120
ns
LED Output OUT_ Turn-Off Rise
Time
tr
20% to 80% (Note 3)
120
ns
Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: See Figure 3.
Note 3: A 65Ω pullup resistor connected from OUT_ to 5.5V.
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT (mA)
1.95
1.90
TA = +25°C
TA = -40°C
1.85
3.65
TA = +125°C
TA = +85°C
3.60
3.55
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
4
5.0
5.5
35
30
25
TA = +25°C
20
15
10
3.50
3.0
TA = +85°C
TA = +125°C
TA = -40°C
TA = +25°C
TA = -40°C
1.80
40
MAX6971 toc03
TA = +85°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON, RSET = 720Ω)
SUPPLY CURRENT (mA)
TA = +125°C
3.70
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
RSET = 360Ω)
MAX6971 toc02
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
RSET = 720Ω)
MAX6971 toc01
2.00
SUPPLY CURRENT (mA)
MAX6971
16-Port, 36V Constant-Current LED Driver
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5.0
5.5
16-Port, 36V Constant-Current LED Driver
TA = +25°C
25
20
20
TA = +25°C
15
TA = +85°C
TA = +125°C
10
5
TA = -40°C
3.0
3.5
4.0
4.5
5.0
MAX6971 toc06
TA = +25°C
40
TA = +85°C
30
TA = +125°C
20
0
0
5.5
TA = -40°C
50
10
0
15
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
3.0
SUPPLY VOLTAGE (V)
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 720Ω, V+ = 5.0V)
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 360Ω, V+ = 5.0V)
PORT OUTPUT CURRENT vs. SUPPLY
VOLTAGE (RSET = 720Ω, VOUT = 2V)
20
TA = +25°C
TA = +85°C
15
TA = +125°C
10
TA = -40°C
5
50
40
TA = +25°C
30
TA = +85°C
TA = +125°C
20
25.0
PORT OUTPUT CURRENT (mA)
25
60
MAX6971 toc08
TA = -40°C
PORT OUTPUT CURRENT (mA)
MAX6971 toc07
30
TA = +85°C
24.5
TA = +125°C
24.0
TA = +25°C
TA = -40°C
23.5
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
23.0
0
0.5
PORT OUTPUT VOLTAGE (V)
1.0
1.5
2.0
2.5
3.0
3.0
3.5
PORT OUTPUT VOLTAGE (V)
TA = -40°C
47
5.0
5.5
PORT OUTPUT CURRENT
vs. RSET RESISTANCE (V+ = 5.0V)
TA = +25°C
48
4.5
TA = +85°C
TA = +125°C
46
50
MAX6971 toc11
49
4.0
SUPPLY VOLTAGE (V)
PORT OUTPUT CURRENT vs. SUPPLY
VOLTAGE (RSET = 360Ω, VOUT = 2V)
MAX6971 toc10
0
PORT OUTPUT CURRENT (mA)
PORT OUTPUT CURRENT (mA)
60
MAX6971 toc09
30
25
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 360Ω, V+ = 3.3V)
PORT OUTPUT CURRENT (mA)
35
TA = -40°C
PORT OUTPUT CURRENT (mA)
SUPPLY CURRENT (mA)
TA = +125°C
30
MAX6971 toc05
TA = +85°C
40
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 720Ω, V+ = 3.3V)
PORT OUTPUT CURRENT (mA)
45
MAX6971 toc04
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON, RSET = 360Ω)
40
30
20
10
0
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
0
1
2
3
4
5
RSET RESISTANCE (kΩ)
_______________________________________________________________________________________
5
MAX6971
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
16-Port, 36V Constant-Current LED Driver
MAX6971
Pin Description
PIN
NAME
1
GND
Ground
FUNCTION
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 on CLK’s rising edge.
4
LE
5–20
OUT0–OUT15
21
OE
Output-Enable Input. High forces outputs OUT0 to OUT15 high impedance, without altering the contents
of the output latches. Low enables outputs OUT0 to OUT15 to follow the state of the output latches.
22
DOUT
Serial-Data Output. Data is clocked out of the 16-bit internal shift register to DOUT on CLK’s rising edge.
23
SET
LED Current Setting. Connect SET to GND through a resistor (RSET) to set the maximum LED current.
24
V+
Positive Supply Voltage. Bypass V+ to GND with a 0.1µF ceramic capacitor.
Load-Enable Input. Data is loaded transparently from the internal shift register(s) to the output latch(es)
while LE is high. Data is latched into the output latch(es) on LE’s falling edge, and retained while LE is low.
LED Driver Outputs. OUT0 to OUT15 are open-drain, constant-current-sinking outputs rated to 28V.
CLK
MAX6971
DIN
D0
SERIAL-TO-PARALLEL SHIFT REGISTER
D15
LE
D0
LATCHES
D15
DOUT
POWER-ON
RESET
V+
OE
V+
CONSTANT-CURRENT SINKS
D0
D15
CURRENT
REFERENCE
RSET
OUT0
OUT2
OUT1
OUT3
OUT15
OUT4
GND
GND
Figure 1. Block Diagram
6
_______________________________________________________________________________________
16-Port, 36V Constant-Current LED Driver
The MAX6971 LED driver comprises a 4-wire serial
interface driving 16 constant-current-sinking, opendrain output ports. The outputs drive LEDs in either
static or multiplex applications (Figure 1). The constantcurrent outputs are guaranteed for current accuracy
not only with chip-supply voltage variations (5V ±10%
and 3V to 5.5V), but also over a realistic range of driver
output voltage drop (0.8V to 2.5V). The drivers use current-sensing feedback circuitry (not simple current mirrors) to ensure very small current variations over the full
allowed range of output voltage (see the Typical
Operating Characteristics).
The 4-wire serial interface comprises a 16-bit shift register and a 16-bit transparent latch. The shift register is
written through a clock input, CLK, and a data input,
DIN, and the data propagates to a data output, DOUT.
The data output allows multiple drivers to be cascaded
and operated together. The contents of the 16-bit shift
register are loaded into the transparent latch through a
latch-enable input, LE. The latch is transparent to the
shift register outputs when high, and latches the current
state on the falling edge of LE.
Each driver output is an open-drain, constant-current
sink that should be connected to the cathode of either
a single LED or a series string of multiple LEDs. The
LED anode can be connected to a supply voltage of up
to 36V, independent of the MAX6971 supply, V+. The
constant-current capability is up to 55mA per output,
set for all eight outputs by an external resistor, RSET.
4-Wire Serial Interface
The serial interface on the MAX6971 is a 4-wire serial
interface using four inputs (DIN, CLK, LE, OE) and a
data output (DOUT). This interface is used to write display data to the MAX6971. The serial-interface data
word length is 16 bits, D0–D15. See Figure 2.
The functions of the five interface pins are as follows.
DIN is the serial-data input, and must be stable when it
is sampled on the rising edge of CLK. Data is shifted in,
MSB first. This means that data bit D15 is clocked in
first, followed by 15 more data bits finishing with the
LSB, D0.
LE
tCL
tCH
tLS
tCP
tLW
tLF
CLK
tDH
tDS
DIN
D15
D14
D1
D0
tDO
D7
DOUT
tOEW
OE
tOEL
tOEH
.
80%
OUT_
20%
tf
tr
Figure 2. 4-Wire Serial-Interface Timing Diagram
_______________________________________________________________________________________
7
MAX6971
Detailed Description
16-Port, 36V Constant-Current LED Driver
MAX6971
CLK is the serial-clock input, which shifts data at DIN
into the MAX6971 16-bit shift register on its rising edge.
LE
LE is the latch load input of the MAX6971 that transfers
data from the MAX6971 16-bit shift register to its 16-bit
latch when LE is high (transparent latch), and latches
the data on the falling edge of LE (Figure 2).
The fourth input provides output-enable control of the
output drivers. OE is high to force outputs
OUT0–OUT15 high impedance, without altering the
contents of the output latches, and low to enable outputs OUT0–OUT15 to follow the state of the output
latches.
OE is independent of the operation of the serial interface. Data can be shifted into the serial-interface shift
register and latched, regardless of the state of OE.
DOUT is the serial-data output, which shifts data out
from the MAX6971’s 16-bit shift register on the rising
edge of CLK. Data at DIN is propagated through the
shift register and appears at DOUT 16 clock cycles later.
tLRF
OUT_
LE
tLRR
OUT_
CLK
tCRF
OUT_
CLK
tCRR
OUT_
Figure 3. LE and CLK to OUT_ Timing
Table 1. 4-Wire Serial-Interface Truth Table
SERIAL
CLOCK
DATA
INPUT
INPUT
CLK
D0
DIN
SHIFT-REGISTER
CONTENTS
D1
D2
LOAD
INPUT
LE
… Dn-1 Dn
LATCH CONTENTS
D0
D1
D2
OUTPUT CONTENTS
BLANKING
INPUT
OE
… Dn-1 Dn
D0 D1 D2 … Dn-1 Dn
H
H
R1
R2
… Rn-2 Rn-1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
L
L
R1
R2
… Rn-2 Rn-1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
X
—
R0
R1
R2
… Rn-1 Rn
—
—
—
—
—
—
—
—
—
—
X
X
X
…
X
H
R0
R1
R2
— Rn-1 Rn
—
—
—
—
—
—
—
—
—
P1
P2
P3
L
P0
P1
P2
… Pn-1 Pn
L
P0
P1
P2
—
—
—
—
—
… Pn-1 Pn
— — —
—
X
X
X
…
H
X
X
X
… Pn-1 Pn
Hi-Z Hi-Z Hi-Z … Hi-Z Hi-Z
L = Low-logic level.
H = High-logic level.
X = Don’t care.
P = Present state.
R = Previous state.
Hi-Z = High impedance.
8
_______________________________________________________________________________________
16-Port, 36V Constant-Current LED Driver
Selecting External Component RSET to Set
LED Output Current
The MAX6971 uses an external resistor, RSET, to set the
LED current for outputs OUT0–OUT15. The minimum
allowed value of RSET is 327.3Ω, which sets the output
currents to 55mA. The maximum allowed value of RSET
is 5kΩ. The reference value, 360Ω, sets the output currents to 50mA. To set a different output current, use the
formula:
RSET = 18,000 / IOUT
where IOUT is the desired output current in mA.
Computing Power Dissipation
The upper limit for power dissipation (P D ) for the
MAX6971 is determined by the following equation:
PD = (V+ x I+) + (VOUT x DUTY x IOUT x N)
where:
V+ = supply voltage
I+ = operating supply current when sinking IOUT LED
drive current into N outputs
DUTY = PWM duty cycle applied to OE
N = number of MAX6971 outputs driving LEDs at the
same time (maximum is 16)
VOUT = MAX6971 port output voltage when driving load
LED(s)
IOUT = LED drive current programmed by RSET
Overtemperature Cutoff
The MAX6971 contains an internal temperature sensor
that turns off all outputs when the die temperature
exceeds approximately +165°C. The outputs are
enabled again when the die temperature drops below
approximately +140°C. Register contents are not
affected, so when a driver is overdissipating, the external symptom is the load LEDs cycling between on and
off as the driver repeatedly overheats and cools, alternately turning the LEDs off and then back on again.
Power-Supply Considerations
The MAX6971 operates with a chip supply V+, and one
or more LED supplies. Bypass each supply to GND
with a 0.1µF capacitor as close to the MAX6971 as possible. This is normally adequate for static LED driving.
For multiplex or PWM applications, it is necessary to
add an additional bulk electrolytic capacitor of 4.7µF or
more to each supply for every 4 to 16 MAX6971s. The
necessary capacitance depends on the LED load current, PWM switching frequency, and serial-interface
speed. Inadequate V+ decoupling can cause timing
problems, and very noisy LED supplies can affect LED
current regulation.
Chip Information
PROCESS: BiCMOS
PD = power dissipation, in mW if currents are in mA
Dissipation example:
IOUT = 20mA, N = 16, DUTY = 1, VOUT = 2V, V+ =
5.25V
PD = (5.25V x 25mA) + (2V x 1 x 20mA x 16) = 0.77W
Thus, for a 24-pin TSSOP package (TJA = 1 / 0.0122 =
+82°C/W from the Absolute Maximum Ratings), the
maximum allowed ambient temperature TA is given by:
TJ(MAX) = TA + (PD x TJA) = +150°C =
TA + (0.77 x 82°C/W)
so TA = +86°C.
_______________________________________________________________________________________
9
MAX6971
Applications Information
16-Port, 36V Constant-Current LED Driver
MAX6971
Selector Guide
NUMBER OF
OUTPUTS
PART
MAX OUTPUT
VOLTAGE (V)
MAX OUTPUT
CURRENT (mA)
MAX6968
8
MAX6977
5.5
LED FAULT
DETECTION
WATCHDOG
—
—
Yes
—
MAX6978
Yes
Yes
MAX6970*
—
—
8
MAX6981*
36
MAX6980*
55
MAX6969
MAX6979
MAX6971
MAX6983
16
5.5
16
36
Yes
—
Yes
Yes
—
—
Yes
Yes
—
—
Yes
Yes
*Future product—contact factory for availability.
Typical Application Circuit
+28V
+5V
µC
V+
SCLK
CLK
MOSI
DIN
MISO
DOUT
LOAD
LATCH
ENABLE
OE
360Ω
SET
GND
0V
10
MAX6971
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
0V
______________________________________________________________________________________
16-Port, 36V Constant-Current LED Driver
TSSOP4.40mm.EPS
PACKAGE OUTLINE, TSSOP 4.40mm BODY
21-0066
G
1
1
______________________________________________________________________________________
11
MAX6971
Package Information
(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 (continued)
(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.)
PDIPN.EPS
MAX6971
16-Port, 36V Constant-Current LED Driver
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
© 2005 Maxim Integrated Products
Heaney
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.