SA8803 반도체 회로 부품 판매점
LIGHT EMITTING DIODE DRIVER
|
|
 Sames |
sames
SA8803
LIGHT EMITTING DIODE DRIVER
FEATURES
n Drives 24 LED's under control of Serial n 11 Bit Information word controls up to
Interface
192 LED's (using eight SA8803s)
n Light Emitting Diode intensity n Readback of LED status
programmable using a single resistor n Requires a local clock of 8 times the
n Automatic lamp test facility on reset
data rate
(MRST)
n Constant current from power supply
n Minimal external components
option
n LED intensity constant, regardless of
number of LED's illuminated
DESCRIPTION
PIN CONNECTIONS
The block Diagram of the SA8803 is shown in
Fig. 1. A control word is clocked into the
device via the DATA pin with a local clock
provided to pin CLK. The control word
comprises a 3-bit chip address, a 5-bit LED
address and a Status (on/off) bit. Provided
that the Chip Adress matches the setting on
pins AD0..AD2 then the LED State Register is
addressed and the state of the selected LED
is set according to the Status bit in the Control
word.
The LEDs are driven by banks of Constant
Current Sources in which the value of the
current in all six banks is set by a single
external resistor connected between pin
INTENS and VEE. The total current drained
by the device and the LEDs may be fixed at
six times the LED current by connecting pin
CC to GND.
LED 1 7
LED 2 8
LED 3 9
LED 4 10
V EE 11
LED 5 12
LED 6 13
LED 7 14
V DD 15
LED 8 16
LED 9 17
6 5 4 3 2 1 44 43 42 41 40
39 TEST
38 LED 24
37 LED 23
36 LED 22
SA8803
35 V EE
34 LED 21
33 LED 20
32 LED 19
31 V DD
30 LED 18
29 LED 17
18 19 20 21 22 23 24 25 26 27 28
The status of all LEDs can be verified at any
time by pulling the TEST pin low. When tis
happens the contents of the LED Status
Register are clocked out of the SA8803 on the
pin DOUT. An additional test feature is that
al LEDs are illuminated for a short period after
power up to simplify system testing.
DR-00593
4159
PDS039-SA8803-001
1/10
REV. C 07-03-96
SA8803
FIGURE 1: BLOCK DIAGRAM
INTENS
CC
DATA
START
BIT
DETECTION
CLK CLOCK SCLK
SYNC
AD0....AD2
MRST
TEST
DR-00594
SIN
CLK 11 - BIT SHIFT REGISTER
RESET
START
BIT
3-BIT STOP
CHIP BIT
ADDRESS
COMPARATOR
LED
ADDRESS
DECODER
LED
SELECTION
BUS
24-BIT
LED
STATE
REGISTER
LED
DRIVERS
RESET
LAMP TEST
LOGIC
TEST
CONTROL
LOGIC
LED1
LED24
DOUT
2/10 sames
|
PDF 파일 내의 페이지 : 총 10 페이지
제조업체: Sames
( sames )
SA8803 diode
데이터시트 다운로드 :
[ SA8803.PDF ]
[ SA8803 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
SA8803
LIGHT EMITTING DIODE DRIVER - Sames
SA8806A
64 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER PARALLEL INTERFACE - Sames
SA8806AFA
64 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER PARALLEL INTERFACE - Sames
SA8806APA
64 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER PARALLEL INTERFACE - Sames
SA8807A
96 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER SERIAL (SPI) INTERFACE - Sames
SA8807AFA
96 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER SERIAL (SPI) INTERFACE - Sames
SA8807APA
96 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER SERIAL (SPI) INTERFACE - Sames