參數(shù)資料
型號(hào)： LT3479
廠商： Linear Technology Corporation
元件分類： LED驅(qū)動(dòng)器
英文描述： Single Cell 350mA LED Driver
中文描述： 單細(xì)胞350mA的LED驅(qū)動(dòng)器
文件頁數(shù)： 2/12頁
文件大?。?/td> 123K
代理商： LT3479
2
LTC3490
3490f
Supply Voltage (V
IN
)................................... –0.3V to 6V
Input Voltages (CTRL/SHDN, CELLS)......... –0.3V to 6V
Output Voltages (CAP, LED, SW)................ –0.3V to 6V
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTEW
W
W
U
PACKAGE/ORDER U
U
W
(Note 1)
LTC3490EDD
ORDER PART
NUMBER
DD PART MARKING
LBRQ
T
JMAX
= 125
°
C,
θ
JA
= 43
°
C/W (NOTE 4)
EXPOSED PAD (PIN 9) IS GND
MUST BE SOLDERED TO PCB (NOTE 5)
Operating Temperature Range (Note 2).. –40
°
C to 85
°
C
Storage Temperature Range................. –65
°
C to 125
°
C
Lead Temperature (Soldering, 10 sec, S8) .......... 300
°
C
LTC3490ES8
ORDER PART
NUMBER
S8 PART MARKING
3490
T
JMAX
= 125
°
C,
θ
JA
= 150
°
C/W (NOTE 4)
TOP VIEW
9
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
5
6
7
8
4
3
2
1
CELLS
V
IN
SW
GND
CTRL/SHDN
LOBAT
CAP
LED
1
2
3
4
8
7
6
5
TOP VIEW
CTRL/SHDN
LOBAT
CAP
LED
CELLS
V
IN
SW
GND
S8 PACKAGE
8-LEAD PLASTIC SO
SYMBOL
V
IN
V
IN(START)
I
LED(MAX)
PARAMETER
Input Supply Range
Minimum Start-Up Voltage
LED Drive Current
CONDITIONS
MIN
1
TYP
MAX
3.2
1
UNITS
V
V
(Note 3)
V
CTRL/SHDN
= V
IN
, DD Package
25
°
C to 85
°
C
–40
°
C to <25
°
C
V
CTRL/SHDN
= V
IN
, S8 Package
25
°
C to 85
°
C
–40
°
C to <25
°
C
V
CTRL/SHDN
= 0V
0.9
330
310
350
350
370
385
mA
mA
337
325
350
345
0.1
363
365
1
4
4.7
50
30
1.6
mA
mA
μ
A
I
LED(SHDN)
V
LED
V
LED(OVL)
I
IN(SHDN)
I
IN(ACTIVE)
f
SW
I
L(NMOS)
R
ON(NMOS)
I
L(PMOS)
R
ON(PMOS)
V
IH
LED Drive Current in Shutdown
Output Compliance Voltage
Output Voltage Overvoltage Limit
Input Current, Shutdown
Input Current, Active
Switching Frequency
Leakage Current, NMOS Switch
On Resistance, NMOS Switch
Leakage Current, PMOS Switch
On Resistance, PMOS Switch
Input High (CELLS)
Input High (SHDN)
Input Low (CELLS)
Input Low (SHDN)
●
2.8
4.2
V
V
Open LED
V
CTRL/SHDN
= 0V, Excluding Switch Leakage
Excluding Load Power
●
20
20
1.3
0.1
0.1
0.1
0.13
μ
A
mA
MHz
μ
A
●
1.0
μ
A
V
V
V
V
V
IN
– 0.4
V
IN
0.9
V
IL
0.4
V
IN
0.2
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= 25
°
C. V
IN
= 2.5V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
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