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参数资料
| 型号： | XC9133B02AMR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 8/15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
<Dimming Control>
1. Applying PWM signal to the CE pin
The XC9133 repeats on/off operations by a PWM signal applied to the CE pin. The magnitude of LED current, I LED ,
when the diode is on, is determined by R LED . The magnitude is zero when the diode is off. The average of LED current
is proportional to the positive duty ratio of the PWM signal.
The frequency of the PWM signal can be controlled to the optimum value between 100Hz and 10kHz. With regard to the
amplitude of the PWM signal, the high level should be higher than the "H" voltage of CE, V CEH , and the low level, lower
than the "L" voltage of CE, V CEL .
10kHz, 3 series LED, I LED =20mA
20 μ s / div
1kHz, 3 series LED, I LED =20mA
200 μ s / div
10kHz, 4 series LED, I LED =20mA
20 μ s / div
1kHz, 4 series LED, I LED =20mA
200 μ s / div
2. Step-Wise Regulation of LED Current
In some applications, it may be necessary to incorporate step-wise regulation of LED current, I LED . Step-wise regulation
of LED illumination is achieved by connecting a switch element SW1 in parallel with R LED and in series with R LED1 and
turning SW1 on and off, as shown below. Choose a resistance of R LED so that the minimum necessary current is gained
when switch element SW1 is off. The resistance of R LED1 should be such that a desired increase of current passed
through the LED is gained when the switch element is on.
Ex.) Current I LED = 5mA and 15mA
R LED = 200mV / 5mA = 40 Ω
R LED1 = 200mV / (15mA – 5mA) = 20 Ω
8/15
Figure
Circuit using Step-wise Regulation of LED Current
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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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