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| TLC5947 Datasheet, PDF (5/25 Pages) Texas Instruments – 24-Channel, 12-Bit PWM LED Driver with | |||
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TLC5947
www.ti.com....................................................................................................................................................................................................... SBVS114 â JULY 2008
SWITCHING CHARACTERISTICS
At VCC = 3.0 V to 5.5 V, TA = â40°C to +85°C, CL = 15 pF, RL = 150 â¦, RIREF = 1.6 kâ¦, and VLED = 5.5 V. Typical values at
VCC = 3.3 V and TA = +25°C, unless otherwise noted.
TLC5947
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
tR0
tR1
tF0
tF1
fOSC
Rise time
Fall time
Internal oscillator
frequency
SOUT
OUTn
SOUT
OUTn
10
15 ns
15
40 ns
10
15 ns
100
300 ns
2.4
4
5.6 MHz
tD0
SCLKâ to SOUT
tD1
BLANKâ to OUT0 sink current off
tD2
Propagation delay time OUT0 current on to OUT1/5/9/13/17/21 current on
tD3
OUT0 current on to OUT2/6/10/14/18/22 current on
tD4
OUT0 current on to OUT3/7/11/15/19/23 current on
15
25 ns
20
40 ns
15
24
33 ns
30
48
66 ns
45
72
99 ns
FUNCTIONAL BLOCK DIAGRAM
VCC
SIN
SCLK
XLAT
BLANK
IREF
GND
VCC
4 MHz
Internal
Oscillator
Thermal
Detection
LSB
MSB
Grayscale (12 Bits 24 Channels) Data
´
Shift Register
0
287
288
LSB
MSB
Grayscale (12 Bits 24 Channels) Data
´
Data Latch
0
287
288
DQ
CK
SOUT
12 Bits PWM Timing Control
24
24-Channel, Constant Current Driver
¼
OUT0 OUT1
OUT22 OUT23
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): TLC5947
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