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參數(shù)資料
| 型號： | SC635EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | Charge Pump Flash LED Driver |
| 中文描述： | 電荷泵閃光LED驅動器 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 357K |
| 代理商： | SC635EVB |
3
2005SemtechCorp.
www.semtech.com
POWER MANAGEMENT
ElectricalCharacteristics(Cont.)
SC635
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Flash Mode Start-up Time
(1)
t
F-SU
t = 0 when FLASH goes high to I
OUT
= 90%
of final value
1
ms
Flash Mode Pulse Duration
t
FLASH
3.3V < V
< 4.2V
I
OUT
= 200mA, V
VOUT
> 2.8V
t = 0 when CTRL goes high to I
OUT
= 90%
of final value
indefinite
s
Spotlight Mode Start-up Time
(1)
t
S-SU
1
ms
Oscillator Frequency
f
OSC
Device enabled
250
kHz
Oscillator Frequency Accuracy
D
f
OSC
-15
15
%
Short-circuit Output Current
Limit
I
SC
VOUT shorted to GND
465
mA
Input Current Limit
I
LIMIT
3.3V < V
VIN
< 4.2V
1.0
2.1
A
Over-temperature Protection
(1)
T
OT
150
°C
Hysteresis
10
Logic Input High Threshold
V
IH
FLASH, CTRL
1.5
V
Logic Input Low Threshold
V
IL
FLASH, CTRL
0.4
V
Logic Input High Current
I
IH
FLASH
1
20
35
μA
CTRL
2
40
70
Logic Input High Current
I
IL
FLASH, CTRL
0.1
2.0
μA
ISET Ripple Voltage
(1)
V
ISET(P-P)
Spotlight mode - I
OUT
= 80mA
25
mV
FLASH mode - I
OUT
= 200mA
100
Notes:
(1)Guaranteedbydesign-nottestedinproduction.
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