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PDF IS31FL3218 Data sheet ( Hoja de datos )
| Número de pieza | IS31FL3218 | |
| Descripción | 18 CHANNELS LED DRIVER | |
| Fabricantes | ISSI | |
| Logotipo |  |
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IS31FL3218
18 CHANNELS LED DRIVER
April 2012
GENERAL DESCRIPTION
IS31FL3218 is comprised of 18 constant current
channels each with independent PWM control,
designed for driving LEDs. The output current of each
channel can be set at up to 38mA (Max.) by an external
resistor. The average LED current of each channel can
be changed in 256 steps by changing the PWM duty
cycle through an I2C interface.
The chip can be turned off by pulling the SDB pin low or
by using the software shutdown feature to reduce
power consumption. The slave address is fixed “1010
1000”.
IS31FL3218 is available in QFN-24 (4mm × 4mm) and
SOP-24. It operates from 2.7V to 5.5V over the
temperature range of -40°C to +85°C.
FEATURES
2.7V to 5.5V supply
I2C interface, automatic address increment
function
Internal reset register
Modulate LED brightness with 256 steps PWM
Each channel can be controlled independently
-40°C to +85°C temperature range
QFN-24 (4mm × 4mm), SOP-24 package
APPLICATIONS
Mobile phones and other hand-held devices for
LED display
LED in home appliances
TYPICAL APPLICATION CIRCUIT
VBattery
Micro
Controller
VBattery
1F
VDD
4.7k
100k
3.3k
3
VCC
0.1 F
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
4.7k OUT7
IS31FL3218 OUT8
5
SDA
OUT9
6
SCL OUT10
24
SDB OUT11
OUT12
OUT13
OUT14
2
R_EXT
OUT15
OUT16
4
GND
OUT17
OUT18
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
1
http://www.DataSheet4U.net/
Figure 1 Typical Application Circuit
Note: The maximum output current is set up to 23mA when REXT = 3.3kΩ. The maximum output current can be set by external resistor, REXT.
Please refer to the detail information in Page 9.
Note: The IC should be placed far away from the mobile antenna in order to prevent the EMI.
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 03/28/2012
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
IS31FL3218
DIGITAL INPUT SWITCHING CHARACTERISTICS (Note 2)
Symbol
Parameter
Condition Min.
Typ.
Max.
fSCL Serial-Clock frequency
tBUF
Bus free time between a STOP and a START
condition
1.3
400
tHD, STA
tSU, STA
tSU, STO
tHD, DAT
tSU, DAT
tLOW
tHIGH
tR
Hold time (repeated) START condition
Repeated START condition setup time
STOP condition setup time
Data hold time
Data setup time
SCL clock low period
SCL clock high period
Rise time of both SDA and SCL signals,
receiving
(Note 3)
0.6
0.6
0.6
0.9
100
1.3
0.7
20+0.1Cb 300
tF
Fall time of both SDA and SCL signals,
receiving
(Note 3)
20+0.1Cb 300
Note 1: The recommended minimum value of REXT is 2kΩ, or it may cause a large current.
Note 2: Guaranteed by design.
Note 3: Cb = total capacitance of one bus line in pF. ISINK ≤ 6mA. tR and tF measured between 0.3 × VCC and 0.7 × VCC.
Unit
kHz
μs
μs
μs
μs
μs
ns
μs
μs
ns
ns
http://www.DataSheet4U.net/
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 03/28/2012
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
IS31FL3218
CLASSIFICATION REFLOW PROFILES
Profile Feature
Preheat & Soak
Temperature min (Tsmin)
Temperature max (Tsmax)
Time (Tsmin to Tsmax) (ts)
Average ramp-up rate (Tsmax to Tp)
Liquidous temperature (TL)
Time at liquidous (tL)
Peak package body temperature (Tp)*
Time (tp)** within 5°C of the specified
classification temperature (Tc)
Average ramp-down rate (Tp to Tsmax)
Time 25°C to peak temperature
Pb-Free Assembly
150°C
200°C
60-120 seconds
3°C/second max.
217°C
60-150 seconds
Max 260°C
Max 30 seconds
6°C/second max.
8 minutes max.
http://www.DataSheet4U.net/
Figure 8 Classification profile
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 03/28/2012
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet IS31FL3218.PDF ] | |
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