ltc3220 Linear Technology Corporation, ltc3220 Datasheet - Page 3

• Manufacturer Part Number: ltc3220
• Description: 360ma Universal 18-channel Led Driver
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
unless otherwise noted.
SYMBOL
Universal LED Current, 6-Bit Linear DACs, ULED = 1V
Charge Pump (CPO)
CPO Short-Circuit Detection
SDA, SCL, RST
V
V
I
I
V
RST Timing
Serial Port Timing (Notes 6, 7)
f
t
t
t
t
IH
IL
SCL
BUF
HD,STA
SU,STA
SU,STO
IL
IH
OL
PARAMETER
V
DV
Full-Scale LED Current
Minimum (I
Minimum Programmable Current
LED Current Matching
LED Dropout Voltage
Blink Rate Period
ULED Up/Down Gradation Ramp Times
Gradation Period
V
LED Turn-On Delay
1x Mode Output Impedance
1.5x Mode Output Impedance
2x Mode Output Impedance
CPO Regulation Voltage
Clock Frequency
Threshold Voltage
Test Current
Digital Output Low (SDA)
Reset Pulse Duration
Clock Operating Frequency
Bus Free Time Between Stop and Start
Condition
Hold Time After (Repeated) Start Condition
Repeated Start Condition Setup Time
Stop Condition Setup Time
IN
OL
CC
Shutdown Current
General Purpose Output Mode (GPO)
Shutdown Current
LSB
) LED Current Step
A
= 25°C. V
CONDITIONS
ULED Data Register Programmed to
0b00000001
Any Two Outputs, 50% of FS
I
REG19, D3 and D4
REG19, D1 and D2
REG19, D1 and D2
I
From Stop Bit, Part Enabled
V
V
1.5x Mode, I
2x Mode, I
CPO = 0V
SDA, SCL, RST = DV
SDA, SCL, RST = 0V
I
LED
OUT
PULLUP
IN
IN
The
= 3V, V
= 3V, V
= FS
= 1mA, Single Output Enabled
= 3mA
l
IN
CPO
CPO
CPO
denotes the specifi cations which apply over the full operating
= 3.6V, DV
CPO
= 4.2V (Note 5)
= 4.8V (Note 5)
= 20mA
= 20mA
CC
CC
= 3V, RST = high, C1 = C2 = C3 = 2.2μF , C4 = 4.7μF ,
LTC3220/LTC3220-1
l
l
l
l
l
l
l
l
l
l
l
0.7 • DV
0.65
MIN
0.4
1.3
0.6
0.6
0.6
18
10
–1
–1
10
CC
0.314
0.395
0.313
0.625
1.25
0.24
0.48
0.96
1.25
5.03
0.85
0.12
TYP
120
3.2
1.5
2.5
0.6
3.6
4.1
4.5
20
5
4
0.3 • DV
0.410
0.820
1.640
MAX
1.05
400
1.3
0.4
22
30
7
1
1
1
CC
UNITS
32201fb
3
MHz
Sec
Sec
Sec
Sec
Sec
Sec
Sec
Sec
kHz
mA
mA
mA
mV
mV
mA
μA
μA
μA
μA
μs
ns
μs
μs
μs
μs
%
Ω
Ω
Ω
V
V
V
V
V
V