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ST1208 데이터시트(PDF) 9 Page - Sitronix Technology Co., Ltd.

부품명 ST1208
상세설명  3-Channel White LED Driver
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제조업체  SITRONIX [Sitronix Technology Co., Ltd.]
홈페이지  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST1208 데이터시트(HTML) 9 Page - Sitronix Technology Co., Ltd.

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ST1208
V1.1
9/12
2004/10/27
LED CURRENT vs. SUPPLY VOLTAGE
12
13
14
15
16
17
18
19
2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
SUPPLY VOLTAGE ( V )
LED1
LED2
LED3
EFFICIENCY ( PLEDs / PBATT ) vs.
Li + BATTERY DISCHARGE
40
50
60
70
80
90
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
Li+ BATTERY VOLTAGE,
TIME-WEIGHTED ( V )
45mA
60mA
90mA
100mA
! Typical Operating 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
forward voltage Vf = 3.3 V, ISET = 125 uA
Under-Voltage Protection
0
10
20
30
40
50
60
2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 VIN ( V )
IIN ( mA )
Increase
Reduce
ILED vs. ISET
0
10
20
30
40
50
10
30
60
90
12
0
15
0
18
0
21
0
24
0
ISET ( uA )
VIN = 2.7 V
VIN = 3.0 V
VIN = 3.3 V
VIN = 3.6 V
VIN = 4.2 V
VIN = 5.0 V
ILED = 30 mA @ Iset = 190
VIN = 2.7 V
VIN = 3.0 V
VIN > 3.3 V


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