tb62719af TOSHIBA Semiconductor CORPORATION, tb62719af Datasheet - Page 20

• Manufacturer Part Number: tb62719af
• Description: 16ch Constant Current Drivers And Controller For Full-color Led Modules And Panels
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Details All Dot Adjustment Setting Using PWMCLK Division
DAC3: Details of All Dot Adjustment Setting for DAC3
RESET
RESET
H
H
H
H
H
H
H
H
PI SEL
PI SEL
H
H
H
X
H
H
H
H
X
X
BCEN
H
H
H
H
L
PI REG1
HHHHH
HHHHH
HHHHH
HHHHL
LLLLH
LLLLL
[4:0]
↑
↓
PI REG1
Refer to
notes
HHH
[7:5]
HHL
LLH
LLL
LLL
↑
↓
BCEN
H
H
H
H
L
PWMCLK =
8/8 PWMCLK
(Hz)
1LSB = 1/8
divides
PWMCLK
PWMCLK =
1/8 PWMCLK
(Hz)
PWMCLK =
8/8 PWMCLK
(Hz)
Refer to notes
PWMCLK
Divisor
( ± 0.0161)
(0.9839)
(0.5161)
Current
± 1.61%
1LSB =
100%
100%
100%
Rate
(1.0)
(0.5)
(1.0)
(1.0)
50%
↑
↓
20
The period of PWMCLK is set to
equal the change in the PWM
pulse width data. 1LSB.
Variable does the frequency of
PWMCLK to 1/8 of the minimal. It
is set in 8 levels.
The period of PWMCLK is set to
one-eighth the change in the
PWM pulse width data. 1LSB.
The period of PWMCLK is set to
equal the change in the PWM
pulse width data. 1LSB.
BCEN signal does not affect
PWMCLK frequency dividing.
100% of base current value as
set using DAC1 and DAC2
current adjustment and DAC4 dot
adjustment
Any one of 32 levels in the range
100 to 50% of the current can be
set. (1LSB = 1.61%)
(5-bit DAC performance)
(no guarantee for monotonicity)
50% of base current value as set
using DAC1 and DAC2 current
adjustment and DAC4 dot
adjustment
Initial state after input of reset
signal: 100% of base current
value set as described above
Initial state after input of DCEN
signal: 100% of base current
value set as described above
1LSB variation: ± 1.61%
Non linearity error: ± 1/2LSB
Differential non linearity error:
± 1/2LSB
Operation and Function
Operation and Function
(PI REG2 [4:0])
(PI REG1 [7:5])
When PI SEL = H is selected, 3
bits on MSB sides are
corresponding to set of total dot
adjustment by PWM frequency
dividing.
PI REG [7:5] varies the pulse
width of PWM data
corresponding to 1LSB for eight
levels and adjusts brightness.
This setting values affects pulse
widths on all outputs.
Data input is still enabled if
BCEN = L.
Output current level reflects input
settings.
When PI SEL = H is selected,
5 bits on LSB side are
corresponding to set of surface
brightness adjustment.
The output current can be set to
one of 32 levels.
Data input is still enabled if
BCEN = L.
If BCEN = H, adjustment is
performed at the same time.
TB62719AF
Notes
Notes
2004-05-12