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參數資料
| 型號： | SC620ULTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Octal LED Driver, General Purpose Current Sink with Serial Interface |
| 中文描述： | 八路LED驅動器，通用吸電流的串行接口 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 363K |
| 代理商： | SC620ULTRT |
Description
The SC620 is a multi-purpose LED driver with eight identi-
cal, independently controlled current sinks. Each current
sink can drive an LED by connecting the LED’s anode to
the system power supply and the cathode to the current
sink input pin. Any combination of outputs can be enabled
or disabled for optimal design
fl
exibility.
January 16, 2007
Typical Application Circuit
In addition to the individual current settings, the SC620
employs an adjustable global current gain setting register
to allow the current setting step size to vary from 31.25
μ
A
to 500
μ
A, giving the designer a wide range of options for
LED variation and dimming functions. The maximum output
is also scaled by this step size, with a maximum of 25mA
at the highest step setting.
Multi-colored and white LEDs with different forward volt-
ages can be driven using the same SC620 due to its
fl
oating
cathode technology. This feature allows each output pin to
vary in voltage from 150mV to V
IN
- 1.5V.
All current control is done via an I
2
C interface bus. Only a
single input bypass capacitor is required - no other exter-
nal resistors or capacitors are needed. The 3mm x 3mm
MLPQ package and minimal support components make
the SC620 an ideal solution for low-cost, area-conscious
backlighting designs.
Eight identical current drivers with independent
control
Wide current setting range - 31.25
μ
A to 25mA
3% current matching, 5% accuracy
I
2
C interface for microprocessor control
I
2
C slave address 1110 000x
Less than 1
μ
A quiescent current in shutdown
Low dropout voltage:
≤
150mV
Over-temperature protection
MLPQ-UT-16 package (3mm x 3mm)
Ultra-thin 0.6mm maximum package height
Fully WEEE and RoHS compliant
LCD backlighting LED driver
Multicolor and RGB LED driver
General purpose current sink array
General purpose digital output (open-drain) expander
Auto-focus voice-coil driver
Features
Applications
Battery
SC620
VIN
2
SCL
11
SDA
10
EN
3
GND
1
GND
4
GND
9
GND
12
ILED1
5
ILED2
6
ILED3
7
ILED4
8
ILED6
14
ILED7
15
ILED8
16
ILED5
13
Sub Panel
Color/R/G/B LEDs
1
μ
F
SCL
SDA
EN
Main Panel
LED Backlighting
www.semtech.com
1
POWER MANAGEMENT
SC620
Octal LED Driver, General Purpose
Current Sink with Serial Interface
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