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TLC5944PWPR Datasheet(PDF) 24 Page - Texas Instruments

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Part # TLC5944PWPR
Description  16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET
PDF  36 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TLC5944PWPR Datasheet(HTML) 24 Page - Texas Instruments

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VLED
(Power-SupplyforLED)
SW
NMOS1
SW
PMOS1
LED1-1
LED1-2
C0
C1
C2
I
CHRG
Line1
ParasiticCapacitor
Ordinal
LEDDriver
ConstantCurrent
I
=50mA
OUT
OUT0
ON
OUT1
ON
OUT2
ON
VLED
SW
NMOS0
SW
PMOS0
LED0-0
OUT0
OUT1
OUT2
LED0-1
LED0-2
Line0
SW
PMOS0
ON
OFF
(1)
(2)
(3)
(4)
Ghostphenomenonisobserved
when Line1goesuptoVLED.
V
CHG
GND
OUT0voltageispulleddowntoGNDside
bythecouplingwithLEDlampcapacitor
betweenLine0andOUT0.
Line0isGNDlevel.
Line0isVLEDlevel.
Line1isGNDlevel.
Line1isVLEDlevel.
¼
¼
¼
High
OFF
ON
OFF
ON
OFF
ON
0mA
50mA
0mA
50mA
VLED
V
-
F
VLED
OFF
ON
Low
SW
NMOS0
SW
PMOS1
SW
NMOS1
BLANK
OUT0
OUT0
Voltage
LED0-0
Current
LED1-0
Current
LED1-0
VLED
(Power-SupplyforLED)
SW
NMOS1
SW
PMOS1
LED1-0
LED1-1
LED1-2
C0
C1
C2
Line1
ParasiticCapacitor
Pre-ChargeMOS
PCHGON
TLC5944
LEDDriver
ConstantCurrent
I
=50mA
OUT
OUT0
ON
OUT0
ON
OUT0
ON
VLED
VUP
SW
NMOS0
SW
PMOS0
LED0-0
OUT0
BLANK
OUT1
OUT2
LED0-1
LED0-2
Line0
¼
¼
¼
SW
PMOS0
OUT0
SW
NMOS1
OUT0
Voltage
LED0-0
Current
LED1-0
Current
ON
OFF
ON
OFF
ON
OFF
VLED
V
-
F
VLED
0mA
50mA
0mA
50mA
(1)
(2)
(3)
(4)
Ghostphenomenonnotseen
BLANK
High
PCHGON
Signal
ON
OFF
ON
OFF
SW
PMOS1
SW
NMOS0
ON
OFF
Low
GND
V
CHG
Line1isGNDlevel.
Line1isVLEDlevel.
Line0isVLEDlevel.
Line0isGNDlevel.
DisappearingI
CHRG
Timing
Control
TLC5944
SBVS112 – JUNE 2008 ...................................................................................................................................................................................................... www.ti.com
Figure 33. LED Ghost-Lighting Phenomenon Mechanism
Figure 34. LED Ghost-Lighting Mechanism by Pre-Charge FET
24
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Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): TLC5944



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