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ST1208 Fiches technique(PDF) 8 Page - Sitronix Technology Co., Ltd.

No de pièce ST1208
Description  3-Channel White LED Driver
Download  12 Pages
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Fabricant  SITRONIX [Sitronix Technology Co., Ltd.]
Site Internet  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST1208 Fiches technique(HTML) 8 Page - Sitronix Technology Co., Ltd.

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ST1208
V1.1
8/12
2004/10/27
! Absolute Maximum Ratings
IN, OUT, EN1, EN2 to GND ........……..…....... -0.3V to + 6.0V
SET, LED1, LED2, LED3 to GND ….… -0.3V to ( VIN + 0.3V )
C1N, C2N to GND .........................…..... -0.3V to ( VIN + 1V )
C1P, C2P to GND ...........................……... -0.3V to greater of
.................................................. ....(VOUT + 1V) or (VIN + 1V)
Continuous Power Dissipation (TA = +70°C)
16-Pin QFN ( de-rate 17 mW/°C above +70°C )
1350 mW
16-Pin TSSOP ( de-rate 18 mW/°C above +70°C ) 1500 mW
Operating Temperature Range ...….................-40°C to +85°C
Storage Temperature Range .…....................-40°C to +125°C
! Electrical Characteristics
Condition: VIN = VEN1 = VEN2 = 3.6 V, CIN = C1 = C2 = COUT = 1 uf, dropout current is 60 mA. ( 20 mA / LED X 3 ), LED Vf
= 3.3 V, ISET = 125 uA, Charge pump switching
( TA = +25℃)
Symbol
Parameter
Test Condition
Min.
Typ. Max.
Unit
VIN
IN Operating Voltage
-
2.7
-
5.0
V
IIN
Power Supply Current
Switching, no load
-
2.0
4.0
mA
IOUT
Maximum OUT Current
VIN >=3.6 V, EN1 = EN2 = IN
100
-
mA
ILED
Maximum LEDx Sink Current
VIN >=3.3 V, ISET = 190 uA, EN1 =
EN2 = IN
28
30
-
mA
IINS
Shutdown Supply Current
EN1 = EN2 = GND
-
1
3
uA
ILSS
SET Leakage in Shutdown
EN1 = EN2 = GND, TA = 25
-
0.01
0.1
uA
ILLS
LED Leakage in Shutdown
EN1 = EN2 = GND, TA = 25
-
0.01
0.1
uA
ISET
SET Current Range
30
-
200
uA
VIH
EN1, EN2 Logic High Voltage
VIN=2.7 V to 5.0 V
0.7 VIN
-
VIN
V
VIL
EN1, EN2 Logic Low Voltage
VIN=2.7 V to 5.0 V
0
-
0.2 VIN
V
IEN
EN1, EN2 Input Current
VENx = GND or 5.0 V, TA = 25
-
0.5
1.0
uA
VLED
LEDx Minimum Regulation
Voltage (1.5x Mode)
EN1 = EN2 = IN, ISET = 125 uA
200
300
400
mV
VDP
LEDx Dropout Voltage
ISET = 125 uA
-
20
30
mV
1x mode ( 1 X VIN - VOUT ) / IOUT @
VIN = 4.2 V, IOUT = 60 mA
-
7
10
ROUT
Open-Loop OUT Resistance
1.5x mode ( 1.5 X VIN - VOUT ) / IOUT
@ VIN = 3.6 V, IOUT = 60 mA
-
11
15
Ohm
fSW
Switching Frequency
± 20%
0.8
1.0
1.2
MHz
TTS
Thermal-Shutdown Threshold
20℃ hysteresis
130
160
190
VUV
Undervoltage Lockout Threshold VIN rising or falling, 0.25V hysteresis
2.2
2.3
2.6
V
EN1 = EN2 = IN
145
160
175
EN1 = IN, EN2 = GND
43
48
52
K
SET to LEDx Current Ratio
( ILED / ISET )
ISET= 125 uA
EN1 = GND, EN2 = IN
14
16
17
A/A
A
LEDx Current Accuracy
EN1 = EN2 = IN, RSET = 4.8KOhm,
TA = 0℃ ~ 85℃
-
±3
-
%
M
LEDx Current Matching
EN1 = EN2 = IN, ISET = 125 uA,
TA = 0℃ ~ 85℃ ( Note 1 )
-
±3
-
%
η
Peak efficiency in 1x mode
IOUT = 60 mA, PLEDs / PIN X 100 %
80
88
-
%
Note1: LEDx current matching is define as : ( ILEDX - IAVG ) / IAVG X 100 %.


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