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参数资料
| 型号： | NCP1380ADR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 19/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO PWM 8SOIC |
| 产品变化通告： | NCP1380 Pulldown Resistor Spec Change 01/Jul/2011 |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 电源电压： | 9 V ~ 28 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
NCP1380
Figure 35. Time Out Case n 5 2: the 3 rd and 4 th Valley are Missing
VCO MODE OR FREQUENCY FOLDBACK
V FBth + 6.5 * (10 3)V FB
VCO operation occurs for FB voltage lower than 0.8 V
(FB decreasing), or lower than 1.4 V (FB increasing). This
corresponds to low output power.
During VCO operation, the peak current is fixed to 17.5%
of his maximum value and the frequency is variable and
expands as the output power decreases.
The frequency is set by the end of charge of the capacitor
connected to the C T pin. This capacitor is charged with a
constant current source and its voltage is compared to an
internal threshold (V FBth ) fixed by FB voltage (see
Figure 27). When this capacitor voltage reaches the
threshold, the capacitor is rapidly discharged down to 0 V
and a new period start. The internal threshold is inversely
proportional to FB voltage. The relationship between V FB
and V FBth is given by Equation 1.
(eq. 1)
When V FB is lower than 0.3 V, V CT is clamped to
V CT(MAX) which is typically 5.5 V. Figure 36 shows the
VCO mode at works.
Figure 36. In VCO Mode, as the Power Output Decreases, the Frequency Expands
http://onsemi.com
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| NCP1380BDR2G | 功能描述:电流型 PWM 控制器 QUASI-RES CUR MODE CONTRL RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1380BGEVB | 功能描述:电源管理IC开发工具 NCP1380B 19V QR CONTROLLER RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP1380CDR2G | 功能描述:电流型 PWM 控制器 QUASI-RES CUR MODE CONTRL RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1380DDR2G | 功能描述:电流型 PWM 控制器 QUASI-RES CUR MODE CONTRL RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1380DGEVB | 功能描述:电源管理IC开发工具 NCP1380D 19V QR Controller RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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