Special three-channel LED driver control circuit - Tiansie
Description
LED
、
TM1804
TM1804LED(),MCU 、、LED 。 MCU 、 。 , 。 SOP8 。
、
z z z z z z CMOS 24V 6V~24V (256) : RC , z z z z PWM256,400hz/s 30/s, 512, 1024 z z :SOP8 400Kbps800Kbps
、:
TM1804 OUTR OUTG OUTB GND 1 2 3 4 8 7 6 5 VDD SET DIN DO
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LED
、:
DIN
TM1804
DOUT
SET
VDD:;:
OUTR
LED
Red
PWM
OUTG
LED
Green
PWM
OUTB VDD VSS
LED
Blue PWM
6V±10%
、 : (Ta = 25℃, Vss = 0 V)
LED VDD VOUT VI1 IO1 PD Topt Tstg +6.
0 ~+7.
0 24 -0.
5 ~ VDD + 0.
5 80 400 -40 ~ +80 -65 ~+150 V V V mA mW ℃ ℃
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LED
(Ta = -20 ~ +70℃,Vss = 0 V)
VDD VIH 0.
7 VDD 6 VDD V V
TM1804
-
VIL
0
-
0.
3 VDD
V
-
(Ta = -20 ~ +70℃,VDD = 4.
5 ~ 5.
5 V, Vss = 0 V
IOL1 Idout II VIH VIL VH IDDdyn 80 10 0.
7 VDD 140 0.
35 0.
3 VDD 1 ±1 mA mA μA V V V mA OUTR/OUTG/OUTB Vo=0.
3V VO = 0.
4V,DOUT VI = VDD / VSS DIN,SET DIN,SET DIN,SET ,
PD Rth(j-a) 79.
2
250 190
mW °C/W
(Ta=25°C)
(Ta = -20 ~ +70℃,VDD = 4.
5 ~ 5.
5 V)
Fosc1 Fosc2 tPLZ tPZL 100 ns CL = 15pF, RL = 10K Ω 400 800 300 KHz KHz ns / / DIN → DOUT
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LED
TTHZ Fmax CI 400 120 15 μs Kbps pF
TM1804
CL = 300pF, OUTR/OUTG/OUTB 50% -
、:
,。, DIN,24bit,DO, 。,DO。,OUTR、OUTG、OUTB PWM24bit, , 4ms。DINRESET,, ,24bit,DO。 , , 。1024,1024X0.
4X2=0.
8192ms (0.
4us),。
、:
:
0 1 RESET
:
T0L T0H T1L T1H Treset
T0H T1H T0L T1L Treset
0, 1, 0, 1, Reset,
TYP 0.
68us 1.
36us 1.
36us 0.
68us 24us
±150ns ±150ns ±150ns ±150ns -
:,。
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LED
:
D1
DIN DO
TM1804
D2
DIN DO
D3
DIN DO
D4 3
1
2
:
D1 D2 D3
1 24bit
2 24bit 2 24bit
3 24bit 3 24bit 3 24bit
RESET CODE RESET CODE RESET CODE
1 24bit
2 24bit 2 24bit
24bit:
R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
,RGB。
、:
TM1804 6~24V ,, ,: 6V VDD 1K
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