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參數(shù)資料
| 型號： | TLC5941RHB |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL |
| 中文描述： | 16-CHANNEL的LED驅(qū)動器，帶有點校正與灰度PWM控制 |
| 文件頁數(shù)： | 16/23頁 |
| 文件大?。?/td> | 513K |
| 代理商： | TLC5941RHB |
www.ti.com
GRAYSCALE PWM OPERATION
The grayscale PWM cycle starts with the falling edge of BLANK. The first GSCLK pulse after BLANK increases
the grayscale counter by one and switches on all OUTn with grayscale value not zero. Each following rising edge
of GSCLK increases the grayscale counter by one. The TLC5941 compares the grayscale value of each output
OUTn with the grayscale counter value. All OUTn with grayscale values equal to counter values are switched off.
A BLANK=H signal after 4096 GSCLK pulses resets the grayscale counter to zero and completes the grayscale
PWM cycle (see
Figure 12
).
GSCLK
BLANK
GS PWM
Cycle n
1
2
3
1
GS PWM
Cycle n+1
OUT0
(Current)
OUT1
(Current)
OUT15
(Current)
XERR
n x t
d
t
pd1
t
pd1
+ t
d
t
pd1
+ 15 x t
d
t
pd3
t
pd4
t
wh1
t
wl1
t
wl1
t
pd3
4096
t
h4
t
wh3
t
pd3
+ n x t
d
t
su4
SERIAL DATA TRANSFER RATE
Figure 13
shows a cascading connection of
n
TLC5941 devices connected to a controller, building a basic
module of an LED display system. The maximum number of cascading TLC5941 devices depends on the
application system and is in the range of 40 devices.
Equation 5
calculates the minimum frequency needed:
f(GSCLK)
4096
f(update)
f(SCLK)
193
f(update)
n
(5)
TLC5941
SLVS589–JULY 2005
Figure 12. Grayscale PWM Cycle Timing Chart
where:
f
(GSCLK)
: minimum frequency needed for GSCLK
f
(SCLK)
: minimum frequency needed for SCLK and SIN
f
(update)
: update rate of whole cascading system
n: number cascaded of TLC5941 device
16
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLC5941RHBR | 功能描述:LED顯示驅(qū)動器 16 Channel LED Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| TLC5941RHBRG4 | 功能描述:LED顯示驅(qū)動器 16 Channel LED Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| TLC5941RHBT | 功能描述:LED顯示驅(qū)動器 16 Channel LED Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| TLC5941RHBT | 制造商:Texas Instruments 功能描述:IC LED DRIVER PWM CONTROL 32-QFN |
| TLC5941RHBTG4 | 功能描述:LED顯示驅(qū)動器 16 Channel LED Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
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