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| 型号： | CAT37TDI-T2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.6MHz |
| 电源电压： | 2.5 V ~ 7 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | CAT37TDI-T2DKR CAT37TDI-TE7DKR CAT37TDI-TE7DKR-ND |
CAT37
Typical Application Circuit
VIN
3 V to 5 V
L1 6.8 m H
D1
C1
1 m F
5
VIN
1
SW
C2
1 m F
ON OFF
4
CAT37
SHDN
FB
3
15 mA
C1: Taiyo Yuden JMK212BJ475
C2: Taiyo Yuden EMK212BJ105
L1: Panasonic ELJEA6R8 or equivalent
GND
2
R 1
6.34 W
Figure 1. Driver for Four High ? Brightness White LEDs
Table 1. PIN DESCRIPTION
Pin Number
1
2
3
4
5
Name
SW
GND
FB
SHDN
VIN
Function
Switch pin. This is the drain of the internal power switch. For minimum EMI, minimize the trace area
connected to this pin.
Ground pin. Connect pin 2 to ground.
LED (cathode) connection pin.
Shutdown pin.
Input supply pin. This pin should be bypassed with a capacitor to ground. A 1 m F capacitor mounted
close to the pin is recommended.
Table 2. ABSOLUTE MAXIMUM RATINGS
V IN , FB, SHDN voltage
SW voltage
Storage Temperature Range
Junction Temperature
Lead Soldering Temperature (10 secs)
ESD Rating – Human Body Model
Parameter
Rating
8
20
? 65 to +160
125
300
2000
Unit
V
V
° C
° C
° C
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 3. RECOMMENDED OPERATING CONDITIONS
Parameter
V IN
Ambient Temperature Range
Inductor L1
Input Capacitor C1
Output Capacitor C2
I LED with 1 to 4 LEDs in series
NOTE:
Typical application circuit with external components is shown above.
http://onsemi.com
2
Range
2.5 to 7
? 40 to +85
6.8 ± 20% typical
1.0 ± 20% typical
1.0 ± 20% typical
0 to 20
Unit
V
° C
m H
m F
m F
mA
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