LTC3205_15 Datasheet, PDF (14/16 Pages) Linear Technology – Multidisplay LED Controller

LTC3205
TYPICAL APPLICATIO S
Ultralow Brightness MAIN and SUB Displays
LTC3205
14
I_MS
13
I_RGB
24.9k
487k
PWM SIGNAL
0V TO 1.3V OR HIGHER
50Hz TO 15kHz
BRIGHTNESS = 1 – D
24.9k
BRIGHT DIM
3205 TA08
All Charge Pump Main, Sub, RGB and Camera Light Controller
15
CPO
CAMERA LIGHT
SUB DISPLAY
(DUTY CYCLE = 50%)
ILLUMINATOR
LTC3205
1µF
2
MAIN1
1
MAIN2
24
MAIN3
23
MAIN4
22
SUB1
21
SUB2
18
RED
19
GREEN
20
BLUE
I_RGB
I_MS
13
14
24.9k 12.4k
WHITE
WHITE
WHITE
WHITE
WHITE
I_LED = 40mA
WHITE
RED
I_LED = 20mA
1µF
1µF
8
79
6
4 ^{C1+ C1– C2+ C2–} 3
V_IN
V_OUT
1µF
LTC3202
MAIN DISPLAY
GREEN BLUE
1µF
10 _D0
1
D1
2
FB
WHITE
30Ω
5, 11
GND
WHITE
30Ω
WHITE
30Ω
WHITE
30Ω
3205 TA02
Main, Sub and Keypad Illumination
15
CPO
MAIN DISPLAY
SUB DISPLAY
KEYPAD
LTC3205
1µF
2
MAIN1
1
MAIN2
24
MAIN3
23
MAIN4
22
SUB1
21
SUB2
18
RED
19
GREEN
20
BLUE
I_RGB
I_MS
13
14
16.6k 24.9k
WHITE
WHITE
WHITE
WHITE
WHITE WHITE
BLUE
39Ω
BLUE
39Ω
BLUE
39Ω
BLUE
39Ω
BLUE
39Ω
BLUE
39Ω
3205 TA03
14
3205f