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PDF LPD6803 Data sheet ( Hoja de datos )
| Número de pieza | LPD6803 | |
| Descripción | 3 channel constant-current driver and grey-level modulate output | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LPD6803 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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LPD6803 datasheet
General Description:
LPD6803 is a 3 channel constant-current driver and grey-level modulate output , it uses advanced
high-voltage CMOS technology, provide 3-way, designed to meet the needs of driving function
in the LED lighting system, especially in the dissociation with mutual grey level in the full-colour
lighting system..
LPD6803 includes serial shift register and concatenation driver circuit, grey level data shift
into serial shift register in the clock, and transfer saving , it transfer to interface 3 after
pulse-width modulate ,then output, serial shift register and grey-level counter can be
controlled by different clock signal. In the meantime, LPD6803 driver data signal and
control signal , and output next circuit.
Features:
◇ 3channel driver output, maxim current per channel is 45mA, LED light voltage can
reach 12V.
◇ Output adopt In-Rush online feedback contant-current driver structure, compatible with
constant-voltage module, it also can contact outside equipment and transfer to higher voltage
or current output driver.
◇ Built-In LDO voltage-stabilizing circuit, voltage range is 3-8v, and have 5V stabilizing
voltage output.
◇ Adopt self-add token-ring technology dual shift line, shift clock can reah 24MHz.
◇ Directly input grey-level data, it is transfer to 256 output with reverse-gamma
regulator after inside SUPER-PWM technology, e.g, adopt built-in oscialator as grey-
level clock, it support FREE-RUN module output, especially can be used in low-cost
controller.
◇ Data clock signal is drived strongly to next chip to enhance level after built-in phase-
lock circuit.
◇ High-voltage CMOS technology, industrial design, with extra-good interference
immunity
◇ With SOP16/QFN16 Pb-Free package, meet the requirement of Rohs , also can provide COB
package or DIE.
◇
Footprint:
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1 page  
LPD6803 datasheet
This mode (OMODE=high voltage level or dangle)is suitable used in the situation which
VDD not higher 12V and current on each way not huge 400mA, if VDD<7.5V, you can
ignore those parts in blue dashed above chart, directly contact VDD to VCC.
Current regulator resistance count: RL=(VDD-VLED-VOUT)/ILED
Here: RL is limit current resistance value, VDD is LED light supply voltage, VLED is LED
light voltage when it breakover, VOUT is saturation voltage of the output polar to the
grand(about 0.4v –0.8v), ILED is LED working current( normally no bigger 20mA)
LPD6803 has strong driver capability , in the many LED apply situation, we can adopt
the contact of “First serial then parallel” ( see right chart), but we must pay attention on
power consumption can not exceed maxim value PDMAX:
PD=ILED1*VOUT1+ILED2*VOUT@+ILED3*VOUT3+PIC
Here : PIC is IC basic power consumption , normally not exceed 25mW.
>Inside constant current driver mode:
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LPD6803 datasheet
23 160
24 172
25 185
26 198
27 211
28 225
29 239
30 254
31 256
Memo: this table is output duty cycle related to 32 grade grey level when
GMODE=0,
Its data is revised curve related to GAMMA=1.8
SOP16 package dimension:
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LPD6803.PDF ] | |
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