LTC3205_15 Datasheet, PDF (2/16 Pages) Linear Technology – Multidisplay LED Controller

LTC3205
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN, DV_CC, CPO to GND............................. – 0.3V TO 6V
D_IN, SCLK, LD, STEPUP,
ENRGB ...................................... – 0.3V to (DV_CC + 0.3V)
I_CPO (Note 4)...................................................... 250mA
I_MAIN1-4, I_SUB1,2 (Note 4) ..................................... 50mA
I_{RED,GREEN,BLUE} (Note 4) ..................................... 100mA
I_MS, I_RGB (Note 4) .................................................. 1mA
CPO Short-Circuit Duration ............................ Indefinite
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
24 23 22 21 20 19
MAIN2 1
MAIN1 2
C2^– 3
C1^– 4
C1⁺ 5
C2⁺ 6
18 RED
17 SGND
16 V_IN
25
15 CPO
14 I_MS
13 I_RGB
7 8 9 10 11 12
ORDER PART
NUMBER
LTC3205EUF
UF PART
MARKING
3205
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
T_JMAX = 150°C, θ_JA = 37°C/W, θ_JC = 2°C/W
EXPOSED PAD IS PGND (PIN 25)
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, DV_CC = 1.8V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Power Supply
V_IN Operating Voltage
DV_CC Operating Voltage
I_VIN Operating Current
I_DVCC Operating Current
V_IN Shutdown Current
DV_CC Shutdown Current
White LED Current (MAIN1-MAIN4, SUB1, SUB2)
I_CPO, I_MS, I_IRGB = 0µA, Step-Down Mode
I_CPO = 0µA, Step-Up Mode
Serial Port Idle
q 2.8
4.5
V
q 1.5
5.5
V
70
µA
4.2
mA
1
µA
1
µA
1
µA
I_MS Servo Voltage
25µA < I_MS < 75µA
1.193 1.223 1.253
V
q 1.175 1.223 1.271
V
Full-Scale LED Current Ratio (I_LED/I_MS) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
Half-Scale LED Current Ratio (I_LED/I_MS) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
Quarter-Scale LED Current Ratio (I_LED/I_MS) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
LED Current Matching
Any Two MAIN or SUB Outputs
q 368
400
432 mA/mA
q 184
200
216 mA/mA
q 92
100 108 mA/mA
0.7
%
RGB LED Current (RED, GREEN, BLUE)
I_RGB Servo Voltage
25µA < I_RGB < 75µA
1.193 1.223 1.253
V
q 1.175 1.223 1.271
V
LED Current Ratio (I_LED/I_RGB)
RGB PWM Frequency
RED, GREEN, BLUE Voltage = 1V
360 400 440 mA/mA
RGB LED Switching Frequency
3.5
kHz
RGB PWM (Duty Factor) Range
0/15
15/15
%
3205f
2