TLC5911PZPG4 [TI]

LED DISPLAY DRIVER, PQFP100, GREEN, PLASTIC, HTQFP-100;
TLC5911PZPG4
型号: TLC5911PZPG4
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

LED DISPLAY DRIVER, PQFP100, GREEN, PLASTIC, HTQFP-100

驱动 信息通信管理 接口集成电路
文件: 总33页 (文件大小:594K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
ꢀꢁ ꢂꢃ ꢄꢅꢅ  
ꢁ ꢆ ꢇ ꢇ ꢈꢉ ꢊ ꢆꢈ  
SLLS402 − DECEMBER 1999  
D
D
Drive Capability and Output Counts  
− 80 mA (Current Sink) x 16 Bits  
D
Protection  
− Watchdog Timer (WDT) Function (Turn  
Output Off When Scan Signal Stopped)  
− Thermal Shutdown (TSD) Function (Turn  
Output Off When Junction Temperature  
Exceeds Limit)  
Constant Current Output Range  
− 5 to 80 mA (Current Value Setting for All  
Output Terminals Using External Resistor  
and Internal Brightness Control Register)  
D
D
LOD  
D
D
Constant Current Accuracy  
− LED Open Detection (Detection for LED  
Disconnection)  
4 % (Maximum Error Between Bits)  
Voltage Applied to Constant Current Output  
Terminals  
− Minimum 0.4 V (Output Current 5 mA to  
Data Input/Output  
− Port A (for Data Display)  
− Clock Synchronized 10 Bit Parallel Input  
(Schmitt-Triggered Input)  
− Clock Synchronized 10 Bit Parallel  
Output (3-State Output)  
− Port B (for Dot Correction Data)  
− Clock Synchronized 7 Bit Parallel Input  
(Schmitt-Triggered Input)  
40 mA)  
− Minimum 0.7 V (Output Current 40 mA to  
80 mA)  
D
D
1024 Gray Scale Display  
− Pulse Width Control 1024 Steps  
Brightness Adjustment  
− All Output Current Adjustment for 64  
Steps (Adjustment for Brightness  
Deviation Between LED Modules)  
− Output Current Adjustment by Output  
(OUT0 to OUT15) for 128 Steps  
(Adjustment for Brightness Deviation  
Between Dots)  
− Brightness Control by 16 Steps  
Frequency Division Gray Scale Control  
Clock (Brightness Adjustment for Panel)  
− Clock Synchronized 7 Bit Parallel Output  
D
D
Input/Output Signal Level  
− CMOS Level  
Power Supply Voltage  
− 4.5 V to 5.5 V (Logic, Analog and  
Constant Current)  
− 3 V to 5.5 V (Interface)  
D
D
D
Maximum Output Voltage . . . 15 V  
Data Transfer Rate . . . 20 MHz (Max)  
D
D
Gray Scale Clock Generation  
− Gray Scale Control Clock Generation by  
Internal PLL or External Input Selectable  
Gray Scale Clock Frequency  
− 16 MHz (Max) Using Internal PLL  
− 8 MHz (Max) Using External Clock  
Clock Invert/Noninvert Selectable at  
Cascade Operation  
− Clock Invert Selectable to Reduce  
Changes in Duty Ratio  
D
D
Operating Free-Temperature Range  
−20°C to 85°C  
100-Pin Package HTQFP (P = 4.7 W,  
D
T = 25°C)  
A
Adjustable for these functions independently.  
Allows to write all the data at port A by setting.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
ꢀꢛ  
Copyright 1999, Texas Instruments Incorporated  
ꢗ ꢛ ꢘ ꢗꢐ ꢑꢥ ꢓꢒ ꢖ ꢞꢞ ꢜꢖ ꢔ ꢖ ꢕ ꢛ ꢗ ꢛ ꢔ ꢘ ꢠ  
1
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SLLS402 − DECEMBER 1999  
description  
The TLC5911 is a constant current driver incorporating shift register, data latch, and constant current circuitry  
with a current value adjustable, PLL circuitry for gray scale control clock generation, and 1024 gray scale display  
using pulse width control. The output current is maximum 80 mA with 16 bits, and the current value of constant  
current output can be set by one external resistor. The device has two channel I/O ports. The brightness  
deviation between LED modules (ICs) can be adjusted by external data input from the display data port, and  
the brightness control for the panel can be accomplished by the brightness adjustment circuitry. Independent  
of these functions, the device incorporates the shift register and data latch to correct the deviation between  
LEDs by adjusting the output current using data from the dot correction data port. Moreover, the device  
incorporates WDT circuitry, which turns constant current output off when the scan signal stops during the  
dynamic scanning operation, and TSD circuitry, which turns constant current output off when the junction  
temperature exceeds the limit. Also the LED open detection (LOD) circuitry is used to make error signal output  
at the LED disconnection.  
pin assignments  
PZP PACKAGE  
(TOP VIEW)  
GNDLED  
OUT0  
OUT1  
GNDLED  
OUT2  
OUT3  
GNDLED  
OUT4  
OUT5  
GNDLED  
OUT6  
1
2
3
4
5
6
7
8
VCOIN  
RBIAS  
MAG0  
MAG1  
MAG2  
PDOUT  
GSPOL  
GSCLK  
BLANK  
XENABLE  
XOE  
75  
74  
73  
72  
71  
70  
69  
68  
67  
66  
65  
64  
63  
62  
61  
60  
59  
58  
57  
56  
55  
54  
53  
52  
51  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
OUT7  
GNDLED  
OUT8  
DCLK  
XLATCH  
DCCLK  
XDCLAT  
RSEL0  
RSEL1  
LEDCHK  
NC  
WDTRG  
XDOWN1  
XDOWN2  
BOUT  
OUT9  
GNDLED  
OUT10  
OUT11  
GNDLED  
OUT12  
OUT13  
GNDLED  
OUT14  
OUT15  
GNDLED  
XGSOUT  
XPOUT  
2
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ꢁ ꢆ ꢇ ꢇ ꢈꢉ ꢊ ꢆꢈ  
SLLS402 − DECEMBER 1999  
functional block diagram  
XOE  
BCENA  
DCLK  
DPOL  
DOUT(9−0)  
XDPOUT  
DCLK  
Control  
XENABLE  
DIN(9−0),  
XLATCH  
1 x 10 bit B.C.  
Data Shift Register  
Data Latch  
16 x 10 bit  
Data Shift Register  
RSEL(1−0)  
..........  
16 x 10 bit  
Data Latch  
DCDIN(6−0),  
XDCLAT,  
DCCLK  
..........  
XPOUT  
XGSOUT  
MAG(2−0), GSPOL,  
GSCLK, RBIAS,  
VCOIN, PDOUT  
10 bit  
Clock Countor  
16 x 10 bit  
Data Comparator  
PLL  
BLANK  
BOUT  
OUT0  
ꢦ ꢦ ꢦ  
OUT15  
..........  
16 bit  
LED Driver+LOD  
WDCAP  
WDTRG  
WDT  
TSD  
XDOWN1  
XDOWN2  
LEDCHK  
XDOWN2TST  
..........  
TSENA  
16 bit  
Current Controller  
..........  
IREF  
16 x 7 bit  
D.C. Data Latch  
DCENA  
..........  
16 x 7 bit  
D.C. Data Shift Register  
DCDOUT(6−0)  
Legend:  
B.C. (Brightness Control): Adjustment for brightness deviation between LED modules, and between panels.  
D.C. (Dot Control): Adjustment for brightness deviation between dots.  
NOTE: All the input terminals are with Schmitt triggered inverter except RBIAS, VCOIN, PDOUT, IREF and WDCAP.  
3
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SLLS402 − DECEMBER 1999  
functional block diagram for shift register and data latch  
XOE  
10 16  
10 16  
DATA  
S/R  
DATA  
LATCH  
DATA  
Comparator  
10  
DCLK  
DPOL  
XENABLE  
a
DCLK  
Controller  
A
B
b
c
a
DCCLK  
A
10  
10  
b
c
L
10  
DOUT(9−0)  
H
10  
a
b
c
HI−Z  
10  
7
A
B
DIN(9−0)  
10  
10  
10  
B.C.  
S/R  
B.C.  
LATCH  
Clock Counter  
Current Controller  
DCDIN(6−0)  
a
A
B
XLATCH  
XDCLAT  
b
c
7
DCDOUT(6−0)  
7
7 16  
7 16  
RSEL(1−0)  
D.C.  
S/R  
D.C.  
LATCH  
H
7 16  
DATA  
Comparator  
L
7 16  
Default  
BCENA  
DCENA  
Connecting to 16th 10-bit Bus  
Connecting to 16th 7-bit Bus  
Legend:  
B.C. (Brightness Control): Adjustment for brightness deviation between LED modules, and between panels.  
D.C. (Dot Control): Adjustment for brightness deviation between dots.  
RSEL  
CONNECTION  
RSEL1  
RSEL0  
L
L
L
H
L
A − a, B − c  
A − b, B − c  
A − c  
H
H
H
INHIBIT  
4
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SLLS402 − DECEMBER 1999  
equivalent input and output schematic diagrams  
Input  
VCCIF  
DOUT0−9, DCDOUT0−6, XGSOUT, XPOUT, BOUT  
VCCLOG  
OUTPUT  
INPUT  
GNDLOG  
GNDLOG  
OUTn  
XDOWN1, XDOWN2  
XDOWN1, XDOWN2  
OUTn  
GNDLOG  
GNDLED  
Terminal Functions  
TERMINAL  
I/O  
DESCRIPTION  
NAME  
NO.  
Brightness control enable. When BCENA is low, the brightness control latch is set to the  
default value. The output current value in this status is 100% of the value set by an external  
resistor. The frequency division ratio of GSCLK is1/1. When BCENA is high, writing to  
brightness control latch is enabled.  
BCENA  
94  
I
Blank (Light off). When BLANK is high, all output of the constant current driver are turned  
off. When GSPOL is high, all the output is turned on (LED on) synchronizing to the falling  
edge of GCLK after next rising edge of GSCLK when BLANK goes from high to low. When  
GSPOL is low, all the output is turned on (LED on) synchronizing to the rising edge of GCLK  
after next falling edge of GSCLK when BLANK goes from high to low.  
BLANK  
67  
I
BOUT  
53  
62  
O
I
BLANK buffered output  
Clock input for data transfer. The input data is from DCDIN (port B) . The output data at  
DCDOUT. All data on the shift register for dot correction data from DCDIN is shifted by 1 bit  
and is synchronized to the rising edge of DCCLK.  
DCCLK  
DCDIN0 −  
DCDIN6  
86,87,88,  
89,90,91,92  
Input for 7 bit parallel data (port B). These terminals are used as shift register input for dot  
correction data.  
I
O
I
DCDOUT0 −  
DCDOUT6  
34,35,36,  
37,38,39,40  
Output for 7 bit parallel data (port B). These terminals are used as shift register output for  
dot correction data.  
Latch enable for dot correction data. When DCENA is low, the latch is set to the default value.  
At this time, the output current value is 100% of the value set by an external resistor.  
DCENA  
95  
64  
Clock input for data transfer. The input data is from DIN (port A) , all the data on the shift  
register selected by RSEL0, 1 and the output data at DOUT are shifted by 1 bit and  
synchronized to DCLK. Note that whether synchronizing to the rising or falling edge of DCLK  
is dependent on the value of DPOL.  
DCLK  
I
5
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SLLS402 − DECEMBER 1999  
Terminal Functions (Continued)  
TERMINAL  
NAME  
I/O  
DESCRIPTION  
NO.  
Input for 10 bit parallel data (port A). These terminals are inputs for shift register for gray  
scale data, brightness control, and dot correction data. The register selected is determined  
by RSEL0, 1.  
76,77,78,79,80,  
81,82,83,84,85  
DIN0 − DIN9  
I
Output for 10 bit parallel data (port A). These terminals are outputs for shift register for gray  
scale data, brightness control, and dot correction data. The register selected is determined  
by RSEL0, 1.  
41,42,43,44,45,  
46,47,48,49,50  
DOUT0 − DOUT9  
DPOL  
O
I
Selects the valid edge of DCLK. When DPOL is high, the rising edge of DCLK is valid. When  
DPOL is low, the falling edge of DCLK is valid.  
96  
GNDANA  
GNDLOG  
28  
98  
Analog ground (Internally connected to GNDLOG and GNDLED)  
Logic ground (Internally connected to GNDANA and GNDLED)  
1,4,7,10,13,  
16,19,22,25  
GNDLED  
LED driver ground (Internally connected to GNDANA and GNDLED)  
Clock input for gray scale. When MAG0 through MAG2 are all low, GSCLK is used for pulse  
width control. When MAG0 through MAG2 are not low, GSCLK is used for PLL timing control.  
The gray scale display is accomplished by lighting the LED until the number of GSCLK or  
PLL clocks counted is equal to the data latched.  
GSCLK  
68  
I
Select the valid edge of GSCLK. When GSPOL is high, the rising edge of GSCLK is valid.  
When GSPOL is low, the falling edge of GSCLK is valid.  
GSPOL  
IREF  
69  
32  
I
Constant current value setting. LED current is set to the desired value by connecting an  
external resistor between IREF and GND. The 38 times current is compared to current  
across the external resistor sink on the output terminal.  
I/O  
LED disconnection detection enable. When LEDCHK is high, the LED disconnection  
detection is enabled and XDOWN2 is valid. When LEDCHK is low, the LED disconnection  
detection is disabled.  
LEDCHK  
58  
I
I
PLL multiple ratio setting. The clock frequency generated by PLL referenced to GSCLK is  
set .  
MAG0 − MAG2  
NC  
73,72,71  
57  
No internal connection  
2,3,5,6,8,9,11,  
12,14,15,17,18,  
20,21,23,24  
OUT0 − DOUT15  
O
Constant current output  
PDOUT  
RBIAS  
70  
74  
I/O  
I/O  
Resistor connection for PLL feedback adjustment  
Resistor connection for PLL oscillation frequency setting  
Input/output port selection and shift register data latch switching.  
When RSEL1 is low and RSEL0 is low, the gray scale data shift register latch is selected to  
port A, and the dot correction register latch is selected to port B.  
When RSEL1 is low and RSEL0 is high, the brightness control register latch is selected to  
port A, and the dot correction register latch is selected to port B.  
RSEL0  
RSEL1  
60  
59  
I
When RSEL1 is high and RSEL0 is low, the dot correction register latch is selected to port A  
and no register latch is selected to port B.  
TEST1 − TEST3  
THERMAL PAD  
TSENA  
97,99,100  
I
I
TEST. Factory test terminal. These terminals should be connected to GND.  
Heat sink pad. This pad is connected to the lowest potential IC or thermal layer.  
TSD enable. When TSENA is high, TSD is enabled. When TSENA is low, TSD is disabled.  
Analog power supply voltage  
Package bottom  
31  
33  
93  
26  
75  
VCCANA  
VCCLOG  
Logic power supply voltage  
VCCLED  
LED driver power supply voltage  
VCOIN  
I/O  
I/O  
Capacitance connection for PLL feedback adjustment  
WDT detection time adjustment. WDT detection time is adjusted by connecting a capacitor  
between WDCAP and GND. When WDCAP is directly connected to GND, the WDT function  
is disabled. In this case, WDTRG should be tied to high or low level.  
WDCAP  
30  
6
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SLLS402 − DECEMBER 1999  
Terminal Functions (Continued)  
TERMINAL  
I/O  
DESCRIPTION  
NAME  
WDTRG  
NO.  
WDT trigger input. By applying a scan signal to this terminal, the scan signal can be  
monitored by turning the constant current output off and protecting the LED from the damage  
of burning when the scan signal stops during the constant period designed.  
56  
I
Data latch for dot correction. When XDCLAT is high, data on the shift register for dot  
correction data from DCDIN (port B) goes through latch. When XDCLAT is low, the data is  
latched. Accordingly, if data on the shift register is changed during XDCLAT high, the new  
value is latched (level latch).  
XDCLAT  
61  
55  
I
Shutdown. XDOWN1 is configured as open collector. It goes low when the constant current  
output is shut down by the WDT or TSD function.  
XDOWN1  
O
LED disconnection detection output. XDOWN2 is configured as open collector. XDOWN2  
goes low when a LED disconnection is detected.  
XDOWN2  
XDPOUT  
54  
29  
27  
O
O
I
DPOL output inverted  
Test for XDOWN2. When XDWN2TST is low, XDOWN2 goes low. (This terminal is internally  
pulled up with 50 k)  
XDWN2TST  
DCLK enable. When XENABLE is low, data transfer is enabled. Data transfer starts on the  
valid edge of DCLK after XENABLE goes low. During XENABLE high, no data is transferred.  
XENABLE  
XGSOUT  
66  
52  
I
Clock output for gray scale. When MAG0 through MAG2 are all low, a clock with GSCLK  
inverted appears on this terminal. When MAG0 through MAG2 are not low., PLLCLK  
appears on this terminal.  
O
Latch. When XLATCH is high, data on shift register from DIN (port A) goes through latch.  
When XLATCH is low, data is latched. Accordingly, if the data on the shift register is changed  
during XLATCH high, this new value is latched (level latch).  
XLATCH  
63  
I
Data output enable. When XOE is low, the DOUT0−9 terminals are driven. When XOE is  
high, the DOUT0−9 terminals go to a high-impedance state.  
XOE  
65  
51  
I
XPOUT  
O
GSPOL output inverted  
7
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SLLS402 − DECEMBER 1999  
absolute maximum ratings over operating free-air temperature (unless otherwise noted)  
Logic supply voltage, V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.3 V to 7 V  
CC(LOG)  
Supply voltage for constant current circuit, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.3 V to 7 V  
Analog supply voltage, V  
CC(LED)  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.3 V to 7 V  
CC(ANA)  
Output current (DC), I  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 mA  
OL(C)  
Input voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.3 V to VCCLOG + 0.3 V  
I
Output voltage range, V  
, V  
, V  
, V  
and V  
− 0.3 V to VCCLOG+ 0.3 V  
(DOUT) (DCDOUT) (BOUT) (XPOUT)  
(XGSOUT)  
Output voltage range, V and V  
Storage temperature range, T  
Continuous total power dissipation at (or below) T = 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7 W  
Power dissipation rating at (or above) T = 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38.2m W/°C  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.3 V to 16 V  
O
(XDOWNn)  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 150°C  
str  
A
A
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 under “recommended operating conditions” is not  
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.  
NOTE 1: All voltage values are with respect to GNDLOG terminal.  
recommended operating conditions  
dc characteristics  
MIN  
4.5  
4.5  
4.5  
NOM  
MAX  
5.5  
UNIT  
Logic supply voltage, V  
CC(LOG)  
5
5
5
V
V
V
Supply voltage for constant current circuit, V  
CC(LED)  
5.5  
Analog power supply, V  
CC(ANA)  
5.5  
V
V
V
V
=
(DIFF1)  
− V  
− V  
− V  
CC(LOG)  
CC(LOG)  
CC(ANA)  
CC(ANA)  
CC(LED)  
CC(LED)  
Voltage between V , V  
CC (DIFF1)  
−0.3  
−0.3  
0
0
0.3  
0.3  
V
V
=
(DIFF2)  
GND(LOG) − GND(ANA)  
GND(LOG) − GND(LED)  
GND(ANA) − GND(LED)  
Voltage between GND, V  
(DIFF2)  
V
V
Voltage applied to constant current  
output, V  
OUT0 to OUT15 off  
15  
O
High−level input voltage, V  
IH  
0.8 V  
V
V
V
CC(LOG)  
CC(LOG)  
Low−level input voltage, V  
IL  
GND(LOG)  
0.2 V  
CC(LOG)  
V
= 4.5 V,  
CC(LOG)  
High−level output current, I  
DOUT0 to DOUT9, DCDOUT0 to DCDOUT5,  
BOUT, XGSOUT, XPOUT  
−1  
OH  
mA  
V
= 4.5 V,  
CC(LOG)  
DOUT0 to DOUT9, DCDOUT0 to DCDOUT5,  
BOUT, XGSOUT, XPOUT  
1
Low−level output current, I  
OL  
V
= 4.5 V, XDOWN1, XDOWN2  
5
80  
85  
mA  
mA  
°C  
(CCLOG)  
OUT0 to OUT15  
Constant output current, I  
5
OL(C)  
Operating free−air temperature range, T  
−20  
A
PLL capacitance, C  
(VCO)  
1
µF  
PLL resistor, R  
At 16 MHz oscillation  
22  
30  
kΩ  
kΩ  
(BIAS)  
(PD)  
PLL resistor, R  
8
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SLLS402 − DECEMBER 1999  
recommended operating conditions (continued)  
ac characteristics, V  
=V  
= V = 4.5 V to5.5 V, TA =20 to85°C (unless otherwise noted)  
CC(LED)  
CC(LOG)  
CC(ANA)  
MIN  
TYP  
MAX  
UNIT  
At single operation  
20  
DCLK, DCCLK clock frequency, f  
/f  
MHz  
(DCLK) (DCCLK)  
At cascade operation  
15  
DCLK, DCCLK pulse duration (high- or low-level), t  
/t  
20  
40  
ns  
MHz  
ns  
w(h) w(l)  
GSCLK clock frequency, f  
(GSCLK)  
8
GSCLK pulse duration (high- or low-level), t  
/t  
w(h) w(l)  
PLLCLK clock frequency, f  
(PLLCLK)  
16  
8
MHz  
MHz  
ns  
WDT clock frequency, f  
(WDT)  
WDT pulse duration (high- or low-level), t  
w(h) w(l)  
XLATCH, XDCLAT pulse duration (high-level), t  
/t  
40  
30  
ns  
w(h)  
Rise/fall time, t /t  
r f  
100  
ns  
DINn − DCLK  
5
5
DCDINn − DCCLK  
BLANK − GSCLK  
XENABLE − DCLK  
XLATCH − DCLK  
XLATCH − GSCLK  
XDCLAT − DCCLK  
RSEL − DCLK  
RSEL − DCCLK  
RSEL − XLATCH  
RSEL − XDCLAT  
10  
15  
10  
10  
10  
10  
15  
30  
15  
Setup time, t  
su  
ns  
DINn − DCLK  
15  
15  
20  
30  
20  
20  
20  
20  
10  
DCDINn − DCCLK  
XENABLE − DCLK  
XLATCH − DCLK  
XDCLAT − DCCLK  
RSEL − DCLK  
RSEL − DCCLK  
RSEL − XLATCH  
RSEL − XDCLAT  
Hold time, t  
ns  
h
9
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electrical characteristics, LEDCHK = L, MIN/MAX: V  
= V  
= V  
= 4.5 V to 5.5 V,  
CC(LOG)  
CC(ANA)  
CC(LED)  
T = −20 to 85°C, TYP: V  
= V  
= V  
= 5 V, T = 25°C (unless otherwise noted)  
A
CC(LOG)  
CC(ANA)  
CC(LED) A  
PARAMETER  
TEST CONDITIONS  
= 1 mA, DOUTn, DCOUTn, XGSOUT,  
MIN  
TYP  
MAX  
UNIT  
I
V
OH  
XPOUT, BOUT  
CC(LOG)  
0.5  
V
V
High-level output voltage  
V
OH  
OL  
I
= 1 mA, DOUTn, DCOUTn, XGSOUT,  
OL  
XPOUT, BOUT  
0.5  
Low-level output voltage  
Input current  
V
I
= 5 mA, XDOWN1, XDOWN2  
0.5  
1
OL  
V = V or GND(LOG)  
CC(LOG)  
I
I
µA  
I
Input signal is static,  
TSENA = H, WDCAP = OPEN,  
No PLL is used  
1
3
mA  
Input signal is static,  
TSENA = H, WDCAP = OPEN,  
PLL multiple ratio = 1042  
I
Supply current (logic)  
mA  
(LOG)  
Data transfer,  
DCLK = 20 MHz, GSCLK = 8 MHz  
No PLL is used  
35  
39  
45  
49  
Data transfer,  
DCLK = 20 MHz, GSCLK = 15 kHz  
PLL multiple ratio = 1042  
mA  
mA  
BLANK = L, R  
BLANK = L, R  
= 1200 Ω  
= 600 Ω  
= 1200 Ω  
= 600 Ω  
6.5  
13  
12  
20  
8
15  
20  
35  
(IREF)  
I
I
Supply current (analog)  
(ANA)  
(IREF)  
LED turn off, R  
LED turn off, R  
(IREF)  
(IREF)  
Supply current  
(constant current driver)  
V
= 1 V, R = 1200 Ω  
(IREF)  
O
mA  
12  
20  
40  
80  
20  
35  
45  
90  
(LED)  
all output bits turn on  
V
= 1 V, R = 600 Ω  
O
(IREF)  
all output bits turn on  
Constant output current  
(includes error between bits)  
V
R
= 1 V, V  
= 1.2 V,  
O
(IREF)  
= 1200 W  
I
I
35  
70  
mA  
mA  
OL(C1)  
(IREF)  
Constant output current  
(includes error between bits)  
V
R
= 0.7 V, V  
= 1.2 V  
O
(IREF)  
= 600 W  
OL(C2)  
(IREF)  
OUT0 to OUT15 (V  
= 15 V)  
0.1  
1
µA  
µA  
OUTn  
XDOWN1, 2 (V  
= 15 V)  
XDOWNn  
I
Constant output leakage current  
OL(K)  
DOUTn, DCDOUTn  
(V = VCCLOG or GND)  
1
µA  
OUTn  
V
=V  
=V  
CC(LOG) CC(ANA) CC(LED)  
Constant output current error  
between bit  
I  
OL(C)  
V
O
= 1 V, R = 600 W  
1%  
4%  
(IREF)  
All output bits turn on  
Changes in constant output current  
depend on supply voltage  
V
V
= 1 V, R = 600 W,  
(IREF)  
IREF  
O
I∆  
I∆  
1%  
1%  
4%  
3%  
V
V
OL(C1)  
= 1.2 V  
Changes in constant output current  
depend on output voltage  
V
V
= 1 V to 3 V, R  
= 600 ,  
= 1.2 V, 1 bit output turn on  
O
IREF  
(IREF)  
OL(C2)  
T
T
TSD detection temperature  
WDT detection temperature  
Voltage reference  
Junction temperature  
No external capacitor  
150  
5
160  
10  
170  
15  
°C  
ms  
V
(tsd)  
(wdt)  
V
BCENA = L, R  
(IREF)  
= 9.6 k,  
1.2  
(IREF)  
Voltage applied to LED  
disconnection detection  
V
0.2  
0.3  
0.4  
2%  
V
(LEDDET)  
R
C
= 22 k, R  
= 0.1 µF  
= 30 k,  
(PD)  
(BIAS)  
(VCO)  
P
PLL jitter  
0.4%  
(LLJITTER)  
10  
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SLLS402 − DECEMBER 1999  
switching characteristics, C = 15 pF, MIN/MAX: V  
= V  
= V  
= 4.5 V to 5.5 V, T  
L
CC(LOG)  
CC(ANA)  
A
CC(LED)  
A
= −20 to 85°C, TYP: V  
= V  
= V  
= 5 V, T = 25°C (unless otherwise noted)  
CC(LOG)  
CC(ANA) CC(LED)  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
12  
12  
110  
10  
10  
130  
30  
50  
20  
7
MAX  
30  
UNIT  
DOUTn, DCDOUTn  
XGSOUT, BOUT, XPOUT  
OUTn (see Figure 1)  
DOUTn, DCDOUTn  
30  
t
t
Rise time  
Fall time  
ns  
r
30  
XGSOUT, BOUT, XPOUT  
OUTn (see Figure 1)  
OUTn+1 − OUTn  
30  
ns  
f
45  
70  
40  
BLANK− OUT0  
40  
10  
BLANK − BOUT  
GSCLK − OUT0 (see Note 2)  
GSCLK − XGSOUT  
DCLK − DOUTn  
10  
15  
15  
15  
10  
10  
10  
20  
30  
30  
30  
20  
15  
20  
40  
45  
t
d
Propagation delay time  
ns  
DCLK − DCDOUTn  
DCCLK − DCDOUTn  
XOE− DOUTn (see Note 3)  
XOE− DOUTn (see Note 3)  
RSEL − DOUTn  
45  
45  
35  
25  
40  
LEDCHK − XDOWN2  
1000  
NOTES: 2. MAG0 to MAG2 are all low level.  
3. Until DOUT is turned on (drive) or turned off (Hi-Z).  
11  
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PARAMETER MEASUREMENT INFORMATION  
V
CC  
51 Ω  
V
CC  
IREF  
OUTn  
GND  
600 Ω  
15 pF  
Figure 1. Rise Time and Fall Time Test Circuit for OUTn  
V
or V  
or V  
100%  
IH  
OH  
V
IH  
IL  
90%  
10%  
50%  
0%  
V
V
IL  
OL  
t
t
r
f
t
d
V
or V  
or V  
100%  
V
V
100%  
IH  
OH  
IH  
50%  
0%  
50%  
0%  
V
IL  
OL  
IL  
t
t
w(l)  
w(h)  
Figure 2. Timing Requirements  
12  
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SLLS402 − DECEMBER 1999  
PRINCIPLES OF OPERATION  
setting for output constant current value  
On the constant current output terminals (OUT0−15), approximately 38 times the current which flows through  
the external resistor, R (connected between IREF and GND), can flow. The external resistor value is  
(IREF)  
calculated using the following equation:  
R
() 38 × 1.2 (V) / I (A) where both BCENA and DCENA are low.  
(IREF)  
OL(C)  
Note that more current flows if IREF is connected to GND directly.  
constant output current operation  
The constant current output turns on (sink constant current), if GSPOL is high and if all the gray scale data  
latched into the gray scale latch is not zero on the falling edge of the gray scale clock after the next rising edge  
of the gray scale clock when BLANK goes from high to low. After that, the number of the falling edge is counted  
by the 10-bit gray scale counter. Then, the output counted corresponding to the gray scale data is turned off  
(stop to sink constant current). The gray scale clock can be selected, as discussed in later section, from GSCLK  
or by internal PLL circuitry. If the shift register for the gray scale is updated during XLATCH high, the data on  
the gray scale data latch is also updated affecting the number of the gray scale of constant current output.  
Accordingly, during the on-state of the constant current output, XLATCH should be kept at a low level and the  
gray scale data latch should be held.  
input/output port and shift register selection  
The TLC5911 supplies two parallel input ports such as DIN (10 bits : port A) and DCDIN (7 bits: port B). The  
DIN and DCDIN ports also supply DCLK and DCCLK for the shift clock, XLATCH and XDCLAT for latch, and  
DOUT and DCDOUT for output, respectively. The device has three kinds of shift register latchs such as the gray  
scale data, brightness control, and dot correction. The port and shift registers can be selected by RSEL0 and  
RSEL1. The selection of the shift registers will be done by RESL0 and RSEL1 as shown in Table 1. Note that  
the RSELn setting is done at DCLK low and DPOL high (DCLK is high when DPOL is low). When only port A  
is used, DCDIN, DCDOUT, DCCLK, and XDCLAT should be connected to GND.  
Table 1. Shift Register Latch Selection  
SELECTED SHIFT REGISTER LATCH  
PORT A  
PORT B  
DCDIN, DCCLK, XDCLAT  
Dot correction  
RSEL1  
RSEL0  
DIN, DCLK, XLATCH, DOUT  
Gray scale data displayed  
Brightness control  
DCDOUT  
L
L
L
H
L
Dot correction  
Dot correction  
Dot correction  
N/A (inhibit)  
Dot correction  
H
H
Dot correction (see Note 4)  
N/A (inhibit)  
Not connected  
H
N/A (inhibit)  
NOTE 4: Zero is output to DOUT7 through DOUT9.  
shift register latch for gray scale data  
The shift register latch for the gray scale data is configured with 16 × 10 bits. The gray scale data, configured  
with 10 bits, represents the time when constant current output is being turned on, and the data range is 0 to 1023  
(00h to 3FFh). When the gray scale data is 0, the time is shortest, and the output is not turned on (light off). On  
the other hand, when the gray scale data is 1023, the time is longest, and it turns on during the time of the 1023  
clocks from the gray scale clock. The configuration of the shift register and the latch for gray scale data is shown  
in Figure 3.  
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SLLS402 − DECEMBER 1999  
PRINCIPLES OF OPERATION  
Latch for Gray Scale Data  
OUT15  
Data  
OUT14  
OUT1  
Data  
OUT0  
Data  
Data  
XLATCH  
(10 bits)  
(10 bits)  
(10 bits)  
(10 bits)  
Shift Register for Gray Scale Data  
16th byte  
DIN9 MSB  
DIN0 LSB  
15th byte  
DIN9 MSB  
DIN0 LSB  
2nd byte  
DIN9 MSB  
DIN0 LSB  
1st byte  
DIN9 MSB  
DIN0 LSB  
DCLK  
DOUT0 to 9  
DIN0 to 9  
Figure 3. Relationship Between Shift Register and Latch for Gray Scale Data  
shift register latch for brightness control  
The shift register latch for brightness control is configured with 1 × 10 bits. Using the shift register latch for the  
brightness control, the division ratio of the gray scale clock can be set and the output current value on constant  
current output can be adjusted. When powered up, the latch data is indeterminate and the shift register is not  
initialized. When these functions are used, data should be written to the shift register latch prior to lighting-on  
(BLANK=L). Also, it is prohibited from rewriting the latch value for the brightness control when the constant  
current output is turned on. When these functions are not used, the latch value can be set to the default value  
setting of BCENA at low level (connect to GND). Also, DIN9 is assigned to the LSB of the reference current  
control to maintain compatibility with the TLC5901/02/03 family. The configuration of the shift register and the  
latch for brightness control is shown in Figure 4.  
Latch for Brightness Control  
Gray Scale Clock Division Ratio Data Set  
Current Data Adjusted On Constant Current Output  
XLATCH  
(see Note A)  
0
0
0
0
1
1
1
1
1
1
MSB  
LSB  
MSB  
LSB  
Shift Register for Brightness Control  
DCLK  
DIN8  
DIN7  
DIN6  
DIN5  
DIN4  
DIN3  
DIN2  
DIN1  
DIN0  
DIN9  
DOUT0 to 9  
DATA  
DATA  
DATA  
DATA  
DATA  
DATA  
DATA  
DATA  
DATA  
DATA  
DIN0 to 9  
NOTE A: Indicates default value at BCENA low.  
Figure 4. Relationship Between Shift Register and Latch for Brightness Control  
shift register latch for dot correction  
The shift register latch for dot correction is configured with 16 × 7 bits. Using the shift register latch for dot  
correction, the current value on the constant current output can be set individually. When powered up, the latch  
data is indeterminate and the shift register is not initialized. When these functions are used, data should be  
written to the shift register latch prior to lighting-on (BLANK=L). Also, rewriting the latch value for dot correction  
when the constant current output is turned on is inhibited. When these functions are not used, the latch value  
can be set to the default value setting of DCENA at low level (connect to GND). The configuration of the shift  
register and the latch for dot correction is shown in Figure 5.  
14  
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SLLS402 − DECEMBER 1999  
PRINCIPLES OF OPERATION  
Latch for Dot Correction  
OUT15  
Data  
OUT14  
Data  
OUT1  
OUT0  
Data  
Data  
XDCLAT  
(7 bits)  
(7 bits)  
(7 bits)  
(7 bits)  
Shift Register for Dot Correction  
16th byte  
15th byte  
2nd byte  
1st byte  
DCCLK  
DCDIN6 MSB  
DCDIN0 LSB  
DCDIN6 MSB  
DCDIN0 LSB  
DCDIN6 MSB  
DCDIN0 LSB  
DCDIN6 MSB  
DCDIN0 LSB  
DCDOUT0 to 6  
DCDIN0 to 6  
Using Port B (RSEL0=L or H, RSEL1=L)  
Latch for Dot Correction  
OUT15  
Data  
OUT14  
Data  
OUT1  
Data  
OUT0  
Data  
XLATCH  
(7 bits)  
(7 bits)  
(7 bits)  
(7 bits)  
Shift Register for Dot Correction  
16th byte  
DIN6 MSB  
DIN0 LSB  
15th byte  
DIN6 MSB  
DIN0 LSB  
2nd byte  
DIN6 MSB  
DIN0 LSB  
1st byte  
DIN6 MSB  
DIN0 LSB  
DCLK  
DOUT0 to 6  
DIN0 to 6  
Using Port A (RSEL0=L, RSEL1=H)  
Figure 5. Relationship Between the Shift Register and the Latch for Dot Correction  
write data to shift register latch  
The shift register latch written is selected using the RSEL0 and RSEL1 terminal. At port A, the data is applied  
to the DIN data input terminal, clocked into the shift register and synchronized to the rising edge of DCLK after  
XENABLE is pulled low. At port B, the data is applied to the DCDIN data input terminal, clocked into the shift  
register, and synchronized to the rising edge of DCCLK. The shift register for the gray scale data is configured  
with 16 × 10 bits and the shift register for dot correction is configured with 16 × 7 bits resulting in sixteen times  
DCLK. The shift register for the brightness control is configured with 1 × 10 bits resulting in one times DCLK.  
At the number of DCLK input for each case, data can be written into the shift register. In this condition, when  
the XLATCH at port A or the XDCLAT at port B is pulled high, data in the shift register is clocked into the latch  
(data through). When the XLATCH at port A or XDCLAT at port B is pulled low, data is held (latch).  
15  
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SLLS402 − DECEMBER 1999  
PRINCIPLES OF OPERATION  
brightness control function  
By writing data into the brightness control latch, current on all the constant current outputs can be adjusted to  
control the variation of brightness between ICs. The division ratio for the gray scale clock can be set to control  
the variation of brightness for the total panel system. Furthermore, by writing data into the dot correction latch,  
current on each constant current output can be adjusted.  
output current adjustment on all constant current outputs − brightness adjustment between ICs  
By using the lower 6 bits of the brightness control latch, output current can be adjusted in 64 steps as 1 step  
of 0.8% of the current ratio between 100% and 50.8% when the output current is set to 100% of an external  
resistor (note that the current value is lower if the constant current output is corrected using the dot correction  
function). By using this function, the brightness control between modules (ICs) can be adjusted sending the  
desired data externally even if ICs are mounted on a print-circuit board. When BCENA is pulled low, the output  
current is set to 100%.  
Table 2. Relative Current Ratio For Total Constant Current Output  
CURRENT RATIO  
V
IREF  
(TYP)  
20 (mA)  
80 (mA)  
CODE  
%
50.8  
10.2  
40.6  
MSB 000000 LSB  
0.60  
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
99.2  
100  
19.8  
20.0  
79.7  
80.0  
111110  
1.19  
1.20  
111111  
BCENA is low.  
frequency division ratio setting for gray scale clock − panel brightness adjustment  
By using the upper 4 bits of the brightness control latch, the gray scale clock can be divided into 1/1 to 1/16.  
If the gray scale clock is set to 16 times the speed of frequency (1024×16=16384) during horizontal scanning  
time, the brightness can be adjusted in 16 steps by selecting the frequency division ratio. By using this function,  
the total panel brightness can be adjusted at once, and applied to the brightness of day or night. When BCENA  
is pulled low, the gray scale clock is not divided. When BCENA is pulled high, the brightness can be adjusted  
as shown in Table 3.  
Table 3. Relative Brightness Ratio For Total Constant Current Output  
RELATIVE  
BRIGHTNESS RATIO  
(%)  
FREQUENCY DIVISION  
CODE  
RATIO  
MSB 0000 LSB  
1/1  
6.3  
.
.
.
.
.
.
.
.
.
.
.
.
1110  
1111  
1/15  
1/16  
93.8  
100  
BCENA is low.  
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SLLS402 − DECEMBER 1999  
PRINCIPLES OF OPERATION  
output current adjustment on each constant current output − LED brightness adjustment  
By using the dot correction latch, the output current on each constant current output can be adjusted in 128 steps  
as 1 step of 0.8% of the current ratio between 100% and 0% when the output current is set to 100% of an external  
resistor at 7Fh of the latched value and the lower 6 bits of the brightness control register. By using this function,  
the brightness deviation from the LED brightness variation can be minimized. When DCENA is pulled low, the  
output current is set to 100% without the dot correction.  
Table 4. Relative Current Ratio By Constant Current Output  
CODE  
CURRENT RATIO %  
I
=40 (mA)  
OL(C)  
MSB 0000000 LSB  
0.0  
0.0  
.
.
.
.
.
.
.
.
.
.
.
.
1111110  
99.2  
100  
39.7  
40  
1111111  
DCENA is low.  
clock edge selection  
The high speed clock signal is diminished due to the duty ratio change through the multiple stages of the IC or  
module as shown in Figure 6.  
IN  
A
OUT  
IN  
A
A’  
OUT  
OUT’  
IN  
IN’  
A
A’  
OUT  
OUT  
a) Propagate through multiple stages buffer  
with slow falling edge  
b) Insert inverter between buffers  
Figure 6. Clock Edge Selection  
In Figure 6a, if the falling edge at the internal buffer is behind the rising edge, the clock will disappear if a multiple  
cascade connection is made. To resolve this problem, the duty ratio can be held unchanged using the  
connection as shown in Figure 6b if the valid clock edge can be selected (arrow in Figure 6). Note that the clock  
delay is not avoided even in this case.  
The device incorporates the clock edge selection function for each DCLK and GSCLK. By using this function,  
the falling edge or rising edge for the valid edge can be selected depending on the status of DPOL and GSPOL,  
thus the degradation for the duty ratio can be reduced. The relationship between each signal is shown in Table 5.  
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SLLS402 − DECEMBER 1999  
PRINCIPLES OF OPERATION  
Table 5. Valid Edge For DCLK and GSCLK  
DPOL  
DCLK valid edge  
DCLK↑  
Operation at XENABLE = H  
H
L
Pull DCLK to low level  
Pull DCLK to high level  
DCLK↓  
GSPOL  
GSCLK valid edge  
GSCLK↑  
PLL operation  
H
L
Synchronize to the high level of DCLK  
Synchronize to the low level of DCLK  
GSCLK↓  
The device supplies the XPOUT and XGSOUT output terminals for the cascade operation which inverts GSPOL  
and GSCLK respectively. It also supplies the BOUT output terminal as a buffered BLANK to make timing easy  
with GSCLK and XGSOUT.  
gray scale clock generation  
When MAG<0:2> are all low, the clock input from the GSCLK terminal is used as the gray scale clock with no  
change, and except for this case the internal PLL generates the clock for the gray scale control clock. When  
using the PLL, the gray scale clock is generated by adjusting the clock to have the same number of pulses as  
the multiple ratio of the GSCLK reference period (when GSCLK and GSPOL are kept at the same level). The  
ratio in this case is determined depending on MAG0 through MAG2 as shown in Table 6.  
When using the PLL, the internal PLLCLK is clocked out at the XGSOUT terminal. Therefore, the clock can be  
utilized for other devices on the same print-circuit board. Note that the number of ICs connected is limited  
depending on the frequency.  
Table 6. PLL Multiple Ratio  
MAG2  
MAG1  
MAG0  
MULTIPLE RATIO  
XGSOUT  
L
L
L
L
L
H
L
1 (Signal to control GSCLK by GSPOL)  
Inverted GSCLK  
8
2 +6(=262)  
9
2 +10(=522)  
L
H
H
L
10  
2
L
H
L
+18(=1042)  
+34(=2082)  
+66(=4162)  
+130(=8322)  
+258(=16642)  
PLLCLK  
11  
12  
H
H
H
H
2
(Gray scale clock is internally generated)  
L
H
L
2
13  
2
H
H
14  
2
H
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PRINCIPLES OF OPERATION  
gray scale clock generation (continued)  
MAG<2:0>  
GSPOL  
Except all low level  
Except all low level  
GSCLK  
XGSOUT  
PLLCLK  
Same number of pulse as ratio  
a) GSPOL is low  
Same number of pulse as ratio  
a) GSPOL is high  
Figure 7. Gray Scale Clock Generation  
The oscillation frequency bandwidth as referenced for the PLL can be set by an external resistor connected  
between RBIAS and GND. The relation between the external resistor and the oscillation frequency is shown  
in Table 7.  
Table 7. PLL Oscillation Frequency  
RBIAS  
22 kΩ  
30 kΩ  
62 kΩ  
12 0kΩ  
FREQUENCY  
13 to 16 MHz  
8 to 14 MHz  
4 to 9 MHz  
3 to 5 MHz  
Note that it takes 30 ms for the PLL to be stabilized. Furthermore, to make the PLL operation stabilized, a resistor  
and a capacitor connection is required between VCOIN, PDOUT and GND. The recommended values are  
shown in the Figure 8.  
PDOUT  
VCOIN  
C(  
R(  
pd)  
VCO)  
Recommeded Value  
0.1 to 1 µF 22 to 62 kΩ  
R
(pd)  
C(  
VCO)  
Figure 8. Resistor and Capacitor Connection  
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PRINCIPLES OF OPERATION  
protection  
This device incorporates WDT and TSD functions. If the WDT or TSD functions, the constant current output is  
stopped and XDOWN1 goes low. Therefore, by monitoring the XDOWN1 terminal, these failures can be  
detected immediately. Since the XDOWN1 output is configured as open collector, outputs of multiple ICs are  
brought together.  
WDT (watchdog timer)  
The constant current output is forced to turn off and XDOWN1 goes low when the fixed period elapsed after the  
signal applied to WDTRG has not been changed. Therefore, by connecting a scan signal (a signal to the control  
line displayed) to WDTRG, the stop of the scan signal can be detected and the constant current output is turned  
off preventing the LED from burning and damage caused by continuous LED turn on at the dynamic scanning  
operation. The detection time can be set using an external capacitor, C1. The typical value is approximately 10  
ms without capacitor, 160 ms with a1000 pF capacitor, and 1500 ms with a 0.01 µF capacitor. During static  
operation, the WDT function is disabled connecting the WDCAP to GND (high or low level should be applied  
to WDTRG). Note that normal operations will be resumed changing the WDTRG level when WDT functions.  
WDT operational time T (ms) 10 + 0.15 x C1 (pF)  
Time (ms)  
1500  
TLC5911  
Scan Signal  
WDTRG  
WDCAP  
160  
10  
C1  
0
0.001  
0.01  
C1 − External Capacitor − µF  
Figure 9. WDT Operational Time and Usage Example  
TSD (thermal shutdown)  
When the junction temperature exceeds the limit, TSD functions and turns the constant current output off, and  
XDOWN1 goes low. When TSD is used, TSENA is pulled high. When TSD is not used, TSENA is pulled low.  
To recover from the constant current output off-state to normal operations, the power supply should be turned  
off or TSENA should be pulled low once.  
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PRINCIPLES OF OPERATION  
LOD function (LED open detection)  
When LEDCHK is low, the LED disconnection detection function is disabled and XDOWN2 goes to a  
high-impedance state. When LEDCHK is high, the LED disconnection detection function is enabled, and  
XDOWN2 goes low if any LED is disconnected while monitoring the OUTn terminals to be turned on. This  
function is operational for sixteen OUTn terminals individually. To determine which constant current output is  
disconnected, the level of XDOWN2 is checked 16 times from OUT0 to OUT15 turning one constant current  
output on. The power supply voltage should be set so the constant current output applied is above 0.4 V when  
the LED is turned on normally. Also, since approximately 1000 ns is required from turning the constant current  
output on to XDOWN2 output, the gray scale data to be turned on during that period should be applied.  
Table 8 is an example of XDOWN2 output status using four LEDs .  
Table 8. XDOWN2 Output Example  
LED NUMBER  
LED STATUS  
OUTn  
1
2
3
4
GOOD  
ON  
NG  
ON  
NG  
GOOD  
ON  
NG  
ON  
NG  
DETECTION RESULT  
XDOWN2  
GOOD  
GOOD  
LOW (by case 2, 4)  
LED NUMBER  
LED STATUS  
OUTn  
1
2
3
4
GOOD  
ON  
NG  
ON  
NG  
GOOD  
OFF  
NG  
OFF  
GOOD  
DETECTION RESULT  
XDOWN2  
GOOD  
GOOD  
LOW (by case 2)  
LED NUMBER  
LED STATUS  
OUTn  
1
2
3
4
GOOD  
OFF  
NG  
GOOD  
OFF  
NG  
OFF  
GOOD  
OFF  
GOOD  
DETECTION RESULT  
XDOWN2  
GOOD  
GOOD  
HIGH-IMPEDANCE  
noise reduction  
concurrent switching noise reduction  
Concurrent switching noise has a potential to occur when multiple outputs turn on or off at the same time. To  
prevent this noise, the device has delay output terminals such as XGSOUT, BOUT for GSCLK (gray scale clock),  
and BLANK (blanking signal) respectively. By connecting these outputs to the GSCLK and BLANK terminals  
of next stage IC, it allows differences in the switching time between ICs. When GSCLK is output to GSOUT  
through the device, duty will be changed between input and output. The number of stages to be connected will  
be limited depending on the frequency.  
delay between constant current output  
The constant current output has a delay time of approximately 20 ns between outputs. It means approximately  
300 ns delay time exists between OUT0 and OUT15. This time difference by delay is effective for the reduction  
of concurrent switching noise.  
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PRINCIPLES OF OPERATION  
others  
power supply  
The following should be taken into consideration:  
D
D
VCCLOG, VCCANA and VCCLED should be supplied by a single power supply to minimize voltage  
differences between these terminals.  
The bypass capacitor should be located between the power supply and GND to eliminate the variation of  
power supply voltage.  
GND  
Although GNDLOG, GNDANA, and GNDLED are internally tied together, these terminals should be externally  
connected to reduce noise influence.  
thermal pad  
The thermal pad should be connected to GND to eliminate the noise influence, since it is connected to the bottom  
side of IC chip. Also, the desired thermal effect will be obtained by connecting this pad to the PCB pattern with  
better thermal conductivity.  
power rating free-air temperature  
3.2  
4.7  
2.3  
1.48  
0
0
−20  
0
25  
85  
T
A
− Free-Air Temperature − °C  
NOTES: A. The IC is mounted on PCB.  
3
PCB size : 102 × 76 × 1.6 [mm ], four layers with the internal two layers being plane. The thermal pad is soldered to the PCB  
2
pattern of 10 × 10 [mm ]. For operation above 25°C free-air temperature, derate linearly at the rate of 38.2 mW/°C.  
V
=V  
=V  
=5 V, I  
= 80 mA, I is a typical value.  
CC(LOG) CC(ANA) CC(LED)  
OL(C)  
CC  
B. The thermal impedance will be varied depending on the mounting conditions. Since the PZP package established a low  
thermal impedance by radiating heat from the thermal pad, the thermal pad should be soldered to the pattern with a low thermal  
impedance.  
C. The material for the PCB should be selected considering the thermal characteristics since the temperature will rise around  
the thermal pad.  
Figure 10. Power Rating  
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PRINCIPLES OF OPERATION  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
0.1  
1.0  
10.0  
R
(k)  
(IREF)  
Conditions : V = 1 V, V  
O
= 1.2 V  
(IREF)  
V
(V)  
  38  
(kW)  
(IREF)  
I
(mA) ^  
OL(C)  
R
(IREF)  
46  
R
(kW) ^  
(IREF)  
I
(mA)  
OL(C)  
NOTE: The brightness control and dot corrected value are set at 100%.  
The resistor, R , should be located as close as possible to the IREF terminal to avoid noise influence.  
(IREF)  
Figure 11. Current on Constant Current Output vs External Resistor  
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PACKAGE OPTION ADDENDUM  
www.ti.com  
10-Jun-2014  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(6)  
(3)  
(4/5)  
TLC5911PZP  
ACTIVE  
HTQFP  
PZP  
100  
90  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-3-260C-168 HR  
-20 to 85  
TLC5911  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability  
information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that  
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight  
in homogeneous material)  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
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Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
10-Jun-2014  
Addendum-Page 2  
IMPORTANT NOTICE  
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