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参数资料
| 型号： | XC9133B02AMR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.26A SOT25 |
| 标准包装： | 3,000 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 17.5 V |
| 输入电压： | 2.5 V ~ 6 V |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 260mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SOT-25 |
XC9133
Series
■ APPLICATION INFORMATION (Continued)
<Dimming Control (Continued)>
3. Using DC Voltage
If in an application it is necessary to control the LED current by a variable DC voltage, illumination control of LED is
achieved by connecting R1 and R2 and applying a direct-current voltage to R2, as shown below.
When R1>>R LED , I LED which flows into LEDs can be calculated by the following equation;
I LED
I LED
= (V REF - R1 / R2 (V DC - V REF )) / R LED
XC9133
V REF = 0.2V (TYP.)
FB
Ex.1) When R1 = 10k Ω , R2 = 100k Ω , R LED = 10 Ω ,
V DC
R 2
R 1
In the range of 0.2V to 2.2V DC, I LED
(LED current) varies between 20mA to 0mA.
Ex.2) When R1 = 10k Ω , R2 = 100k Ω , R3 = 10k Ω ,
C1 = 0.1 μ F, RLED = 10 Ω, the average LED current will
be 10mA by inputting a PWM signal of CE ‘H’ level:
2.2V, CE ’L’ level: 0V, duty cycle: 50%, oscillation
frequency: 100Hz. As well as the way of dimming
control by applying the PWM signal to the CE pin, the
average LED current increases proportionally with the
positive duty cycle of the PWM signal.
Figure
Figure
R LED
Circuit using DC voltage
Circuit inputting a PWM signal to the FB pin
<Prevent Emission Caused by White LEDs Leakage>
When the input voltage (V IN ) is high, minimum illumination may occur even if the CE pin is in the disable state. If this
happens, please connect a transistor to between the LED and the FB pin. By driving the CE signal in-phase and cutting
the pass to current, the minimum illumination can be prevented.
L:22 μ H
VLF3010A
SBD
XBS053V15R
V IN
3.6V
(3.2V~6.0V)
C L
C IN
4.7 μ F
V IN
Lx
XP151A12A2
0.22 μ F
(base)
CE
FB
V SS
R LED
10 Ω
20mA
Figure
Circuit Prevent Emission Caused by White LEDs Leakage
9/15
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| XC9140A331MR-G | 制造商:Torex Semiconductor LTD 功能描述:IC REG BOOST 3.3V 0.1A SOT-25 |
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| XC9141B33CMR-G | 功能描述:Boost Switching Regulator IC Positive Fixed 3.3V 1 Output 800mA SC-74A, SOT-753 制造商:torex semiconductor ltd 系列:- 包装:剪切带（CT） 零件状态:有效 功能:升压 输出配置:正 拓扑:升压 输出类型:固定 输出数:1 电压 - 输入（最小值）:0.65V 电压 - 输入（最大值）:6V 电压 - 输出（最小值/固定）:3.3V 电压 - 输出（最大值）:- 电流 - 输出:800mA 频率 - 开关:1.2MHz 同步整流器:是 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商器件封装:SOT-25 标准包装:1 |
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