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参数资料
| 型号： | LTC3452EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER PHOTO FLASH 20-QFN |
| 标准包装： | 2,500 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 7 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 900kHz ~ 1.1MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 4.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LTC3452
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
V IN , PV IN , SW1, SW2, V OUT Voltage ........... – 0.3V to 6V
LED L1 to LED L5 Voltage ... – 0.3V to (V OUT + 0.3V) or 6V
LED H1 , LED H2 Voltage ..... – 0.3V to (V OUT + 0.3V) or 6V
TOP VIEW
20 19 18 17 16
V C , EN L , EN H ,
I SETL , I SETH Voltage ............ – 0.3V to (V IN + 0.3V) or 6V
LED L1 to LED L5 Current ....................................... 50mA
LED H1 , LED H2 Current ....................................... 250mA
Operating Temperature Range (Note 2) .. – 40 ° C to 85 ° C
Junction Temperature (Note 3) ............................ 125 ° C
Storage Temperature Range ................ – 65 ° C to 125 ° C
V IN 1
EN L 2
I SETL 3
LED L1 4
LED L2 5
6
7
21
8
9 10
15 V C
14 EN H
13 I SETH
12 LED H2
11 GND
UF PACKAGE
20-LEAD (4mm × 4mm) PLASTIC QFN
T JMAX = 125 ° C, θ JA = 40 ° C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LTC3452EUF
UF PART MARKING
3452
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T A = 25 ° C.
V IN = PV IN = V OUT = 3.6V unless otherwise specified. (Note 2)
PARAMETER
Input Supply Voltage (V IN )
CONDITIONS
●
MIN
2.7
TYP
MAX
5.5
UNITS
V
Input DC Supply Current
Normal Operation
Shutdown
UVLO
2.7V ≤ V IN ≤ 5.5V, R ISETL = R ISETH = 51.1k, I LEDx = 0 (Note 4)
2.7V ≤ V IN ≤ 5.5V, V ENL = V ENH = 0V
V IN < UVLO Threshold
0.6
6.5
3
1
18
5
mA
μ A
μ A
Undervoltage Lockout Threshold
EN L,H DC Threshold for Normal Operation (V IH )
V IN Rising
V IN Falling
2.7V ≤ V IN ≤ 5.5V, V ENL,H Rising
●
●
1.6
2.0
1.87
0.54
2.3
1.2
V
V
V
EN L,H DC Threshold for Shutdown (I LEDx = 0)
2.7V ≤ V IN ≤ 5.5V, V ENL,H Falling
●
0.2
0.52
V
(V IL )
EN L,H Input Current (I IH , I IL )
EN L PWM Frequency
2.7V ≤ V IN ≤ 5.5V
2.7V ≤ V IN ≤ 5.5V (Note 5)
●
●
–1
10
1
μ A
kHz
I SETL,H Servo Voltage
LED Hx Output Current Ratio (I LEDHx /I SETH )
LED Hx Output Current Matching
LED Hx Pin Voltage
R ISETL = R ISETH = 20k
I LEDHx = 100mA, V LEDHx = 300mV
(Max – Min)/[(Max + Min)/2] ? 100%, I LEDHx = 100mA,
V LEDHx = 300mV, 2.7V ≤ V IN ≤ 5.5V
I LEDHx = 100mA
●
●
788
780
730
714
800
800
768
768
1
250
812
812
806
806
6
mV
mV
mA/mA
mA/mA
%
mV
3452f
2
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