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PDF TB62718AF Data sheet ( Hoja de datos )
| Número de pieza | TB62718AF | |
| Descripción | FULL COLOR LED MODULE AND PANEL SPECIAL CONTROLLER AND LED DRIVER | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TB62718AF (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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TOSHIBA BI-CMOS Integrated Circuit
TB62718AF
Controller and Driver for Full-color LED Modules and Panels
TB62718AF
The TB62718AF is an LED driver which is suitable for driving
full-color LED modules. This device has built-in 8 bit PWM
grayscale and an output current adjustment functions. It can
turn on to 16 LEDs. This device has a heat sink fitting side on the
surface of the package. Then, a heat sink will dissipate heat
generated in the device. In addition, this device incorporates
built-in TSD (thermal Shutdown) and output-open detection
functions to protect the device.
Weight: 0.26 g (typ.)
Features
• Output current capability and number of outputs: 90 mA × 16 outputs
• Constant current range: 5 mA~75 mA
• Application output voltage: 0.7 V (output current 5 mA~90 mA)
• Adjustment function
1. Standard current adjustment (8-bit serial data input)
This function supports standard current adjustment using an external resistance connected to the REXT pin.
2 high-order bits … Output current can be adjusted to any one of 4 levels in the range 25%~100%.
6 low-order bits … Output current can be adjusted to any one of 64 levels in the range 40%~100%.
2. Each dot adjustment (128-bit serial data input)
This function allows adjustment of the current value for each output (dot).
… Output current can be adjusted to any one of 64 levels in the range 20%~100%.
3. All dot adjustment 1 (8-bit parallel data input)
This function allows adjustment of brightness for each LED module.
5 low-order bits … Output current can be adjusted to any one of 32 levels in the range 50%~100%.
4. All dot adjustment 2 (8-bit parallel data input)
This function allows changes to the frequency of the PWM clock and allows major brightness adjustment for
the display.
3 high-order bits … PWM clock frequency can be adjusted to any one of 8 levels in the range 1/1~1/8.
5. 256-grayscale PWM function (8-bit parallel input)
This function controls the pulse width for each output, yielding 256 grayscales.
Maximum PWM clock frequency 10 MHz (for all temperature range), Minimum pulse width 2 ms
• Accuracy of bits in constant-current output levels prior to adjustment
±6.0% max (for output current of 40 mA~80 mA)
±7.0% max (for output current of 20 mA~40 mA)
±12.0% max (for output current of 5 mA~20 mA)
• Protection functions
1. Thermal shutdown function (TSD)
This function monitors the rise in junction temperature.
Connect a pull-up resistor to the ALARM1 pin in order to monitor the temperature.
2. Output Pin Open Detection function
This function detect when an output pin is open.
Connect a pull-up resistor to the ALARM2 pin in order to monitor this.
• For anode-common LEDs
• Input signal voltage level: CMOS level (Schmitt trigger input)
• Power supply voltage range VDD = 4.5 V~5.5 V
• Maximum output pin voltage: 26 V
1 2006-06-14
1 page  
TB62718AF
Constant Current Adjustment Range (graph)
This graph shows how current may be adjusted to a fraction of its full-scale value.
Note 1: In each case, the value input to each DAC is the value output from the previous DAC.
Reference: Current adjustment functions
DAC1 to DAC3 are the current adjustment functions for all outputs.
The adjustment width of DAC1 is large and approximate (1 LSB ∼− 25%).
The adjustment width of DAC2 is the smallest and has a large error (1 LSB ∼− 0.9%).
The adjustment width of DAC3 is small. DAC3 is a high-performance DAC with a small error
(1 LSB ∼− 1.61%).
Therefore,
It is recommended that DAC1 and DAC2 be used for adjusting the REXT resistance.
It is recommended that DAC3 be used for adjusting brightness between module.
(after it was set and it had DAC4 adjusted to the dot.)
The beginning is set in about 75% of the middle value, after that, it is effective to use ±25% of set width.
DAC4 is the current adjustment function for all outputs.
The adjustment width of DAC4 is small. But it is a high-performance DAC with a small error
(1 LSB ∼− 1.27%).
And also, DAC4 has a very wide setting range.
Therefore, DAC4 can be used to adjust the brightness of LEDs without a rank classification.
This method allows brightness to be adjusted with a degree of accuracy of 1.27% of full scale.
Note 2: Assuming precise linear correlation between output current and LED brightness
5 2006-06-14
5 Page 
TB62718AF
Electrical Characteristics 2
(VDD = 4.5 V~5.5 V, Topr = −40°C~85°C, typ: VDD = 5.0 V, Topr = 25°C)
Parameter
Constant-current output
Constant-current output Depends on
temperature
Leakage current for constant-current
output
Constant current accuracy between
bits
Dot adjustment deviation between
bits
(when DAC3 data were changed
from MSB to LSB.)
Constant-current output depends on
output voltage
Constant-current output depends on
supply voltage
TSD detection temperature
Output-open detection voltage
Pull-up/down resistor
Symbol
IOUT1
IOUT2
IOUT3
IOUT4
IOUT5
IOUT6
%TOPR1
%TOPR2
IOLK
∆IOUT1
∆IOUT2
∆IOUT3
∆IOUT4
%IOUT1
%IOUT2
%IOUT3
%IOUT4
%VOUT
%VDD
Tsd1
Tsd2
VARL
Rup/Rdw
Test Conditions
Min
Settings *7
Settings *6a
Settings *5a
Settings *4a
Settings *3a
Settings *2
Settings *6a, VOUT = 1.0 V, Topr is
varied in the range −40°C~85°C.
Settings *4a, VOUT = 1.0 V, Topr is
varied in the range −40°C~85°C.
60.4
51.2
34.1
16.5
7.8
4.54
⎯
⎯
Settings *1, VOUT = 26 V
Settings *6a, VOUT = 0.7 V
Settings *5a, VOUT = 0.7 V
Settings *4a, VOUT = 0.7 V
Settings *3a, VOUT = 0.7 V
Settings is changed from *6a to *6b.
Settings is changed from *5a to *5b.
Settings is changed from *4a to *4b.
Settings is changed from *3a to *3b.
Settings *6a, VOUT is varied in the
range 0.7 V~3 V.
Settings *4a, VOUT is varied in the
range 0.7 V~3 V.
Settings *6a, VDD is varied in the range
4.5 V~5.5 V.
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
120
140
ALARM2
⎯
⎯ 150
Typ.
71.0
60.2
40.1
19.9
10.0
7.1
±50
±25
0.05
±2.5
±3.5
±5.5
±7
±1
±1.5
±3.5
±6
±5
±3
±1
140
160
0.04
VDD
300
Max Unit
81.6
69.2
46.1
V
23.2
12.2
9.65
±80
µA/°C
±50
0.1 µA
±6
±6
%
±7
±12
±3
±3
%
±5
±12
±8
%
±6
±2 %
160
°C
180
⎯V
600 kΩ
Electrical Characteristic Settings
(OUT 00~OUT 15 all on, VOUT = 0.7 V and REXT = 2.7 kΩ unless otherwise specified)
No. DAC Settings
∗1 OUT00~15 OFF, VOUT = 26 V, DAC1~4 = MSB, BLANK = H
∗2 DAC1 = 0, DAC2 = 0, DAC4 = 63, BLANK = L
∗3a DAC1 = 0, DAC2 = 17, DAC4 = 63, BLANK = L
∗4a DAC1 = 1, DAC2 = 17, DAC4 = 63, BLANK = L
∗5a DAC1 = 2, DAC2 = 37, DAC4 = 63, BLANK = L
∗6a DAC1 = 3, DAC2 = 51, DAC4 = 63, BLANK = L
∗7 DAC1 = 3, DAC2 = 63, DAC4 = 63, BLANK = L
∗3b DAC1 = 0, DAC2 = 17, DAC4 = 63, BLANK = L
∗4b DAC1 = 1, DAC2 = 17, DAC4 = 63, BLANK = L
∗5b DAC1 = 2, DAC2 = 37, DAC4 = 63, BLANK = L
∗6b DAC1 = 3, DAC2 = 51, DAC4 = 63, BLANK = L
All Dot Adjustment
(DAC3)
DAC3 = 31
DAC3 = 00
Constant Output Current
(typ.)
IOUT = 0 mA
IOUT = 7.10 mA
IOUT = 10.0 mA
IOUT = 19.9 mA
IOUT = 40.1 mA
IOUT = 60.2 mA
IOUT = 71.0 mA
IOUT = 5.0 mA
IOUT = 10.0 mA
IOUT = 20.0 mA
IOUT = 30.1 mA
11 2006-06-14
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TB62718AF.PDF ] | |
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