MAX6971AUG+T Maxim Integrated Products, MAX6971AUG+T Datasheet - Page 8

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

Specifications of MAX6971AUG+T

• 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: 60 mA
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Supply Current: 25 mA
• 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: Details

16-Port, 36V Constant-Current LED Driver
Figure 3. LE and CLK to OUT_ Timing
Table 1. 4-Wire Serial-Interface Truth Table
L = Low-logic level.
H = High-logic level.
X = Don’t care.
P = Present state.
R = Previous state.
Hi-Z = High impedance.
8
SERIAL
INPUT
OUT_
DATA
LE
OUT_
LE
CLK
OUT_
CLK
OUT_
DIN
—
—
—
H
L
X
_______________________________________________________________________________________
CLOCK
INPUT
CLK
—
—
—
D
R
P
—
H
L
X
0
1
0
SHIFT-REGISTER
D
R
R
R
P
—
t
t
LRF
t
X
LRR
CRF
t
1
1
1
1
2
CRR
CONTENTS
D
R
R
R
P
—
X
3
2
2
2
2
… D
… R
… R
… R
…
… P
—
—
n-1
n-2
n-2
n-1
n-1
X
R
R
D
R
P
—
n-1
n-1
X
n
n
n
INPUT
LOAD
LE
—
—
—
—
H
L
D
R
P
—
—
—
X
0
0
0
LATCH CONTENTS
D
R
—
—
—
P
X
1
1
1
CLK is the serial-clock input, which shifts data at DIN
into the MAX6971 16-bit shift register on its rising edge.
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 out-
puts OUT0–OUT15 to follow the state of the output
latches.
OE is independent of the operation of the serial inter-
face. 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.
D
R
P
—
—
—
X
2
2
2
… D
—
—
—
— R
… P
…
—
—
—
n-1
n-1
X
n-1
D
R
P
—
—
—
X
n
n
n
BLANKING
INPUT
OE
—
—
—
—
H
L
Hi-Z Hi-Z Hi-Z … Hi-Z Hi-Z
D
P
—
—
—
—
0
0
OUTPUT CONTENTS
D
P
—
—
—
—
1
1
D
—
—
—
P
—
2
2
… D
—
—
—
—
… P
—
—
—
—
n-1
n-1
D
P
—
—
—
—
n
n