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PDF TCA62723FMG Data sheet ( Hoja de datos )
| Número de pieza | TCA62723FMG | |
| Descripción | Three-Channel Constant-Current LED Driver | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TCA62723FMG
TOSHIBA CMOS Integrated Circuits Silicon Monolithic
TCA62723FMG
Three-Channel Constant-Current LED Driver
The TCA62723FMG is an optimal constant-current LED driver for RGB pixel
LEDs.
This IC does not have to connect external resistance to each output in the
case of most. The output current of 3ch is set up by one external resistance.
Features
• Power supply voltage range
• Constant current range
• Low consumption current
At the time of IC operation mode (Iout = 20 mA/DC)
At the time of IC power-saving mode
• For anode common LED
• Package
: 2.7 to 5.5 V
: 5 to 150 mA
Weight: 0.018 g (typ.)
: 700 μA (MAX)
: 10 μA (MAX)
: SON10-P-0303-0.50
1 2010-06-10
1 page  
Output Current Dimming Control
1) Method of inputting analog voltage to terminal REXT
1. Precondition
Please set the range of the analog voltage input by 0 to 1.17V.
2. The maximum current is defined as αmA. (VADJ=0V)
α = 1.17×
R1 + REXT
R1×REXT
×460
3. The minimum current is defined as βmA. (VADJ=1.17V)
1
β =1.17× REXT ×460
4. IOUT can be set according to the next expression.
β-α
IOUT = VADJ× 1.17 + α
(Example) Current Dimming from IOUT=120mA to 60mA (Reference data)
VIN
2.7V~5.5V
VOUT
TCA62723FMG
VADJ
0~1.17V
TCA62723FMG
SHDN
CTL0
CTL1
CTL2
GND
VIN
OUT 0
OUT 1
OUT 2
REXT
R1
REXT
Current Dimming Control (Reference data)
R1=24kΩ, REXT=9.1kΩ
140
120
100
80
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1
VADJ (V)
Note: These application examples are provided for reference only. Thorough evaluation and testing
should be implemented when designing your application's mass production design.
5 2010-06-10
5 Page 
Points to remember on handling of ICs
TCA62723FMG
(1) Heat Radiation Design
In using an IC with large current flow such as power amp, regulator or driver, please design the device so that heat
is appropriately radiated, not to exceed the specified junction temperature (TJ) at any time and condition. These ICs
generate heat even during normal use. An inadequate IC heat radiation design can lead to decrease in IC life,
deterioration of IC characteristics or IC breakdown. In addition, please design the device taking into considerate the
effect of IC heat radiation with peripheral components.
(2) Back-EMF
When a motor rotates in the reverse direction, stops or slows down abruptly, a current flow back to the motor’s
power supply due to the effect of back-EMF. If the current sink capability of the power supply is small, the device’s
motor power supply and output pins might be exposed to conditions beyond maximum ratings. To avoid this
problem, take the effect of back-EMF into consideration in system design.
11 2010-06-10
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TCA62723FMG.PDF ] | |
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