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参数资料
| 型号： | NCP1450ASN33T1 |
| 厂商： | ON Semiconductor |
| 文件页数： | 21/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM VM 5TSOP |
| 产品变化通告： | LTB Notification 03/Jan/2008 |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 216kHz |
| 占空比： | 90% |
| 电源电压： | 0.6 V ~ 5.5 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 6-TSOP（0.059"，1.50mm 宽）5 引线 |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCP1450ASN33TOSCT |
NCP1450A
TP1
JP1
L1
10 m H
D1
MBRM110L
TP3
V IN
NTGS3446T1
V OUT
NC
TP2
GND
C2
10 m F
ON
CE
OFF
CE
1
OUT
2
C3
0.1 m F 3
EXT
5
IC1
GND
4
Q1
C1
220 m F
TP4
GND
Figure 73. NCP1450A Evaluation Board Schematic Diagram 1 (Step?up
DC?DC Converter Using External MOSFET Switch)
TP5
JP2
L2
10 m H
D2
MBRM110L
TP7
V IN
Rb
V OUT
TP6
GND
C5
10 m F
ON
CE
OFF
C6
0.1 m F
CE
1
OUT
2
NC
3
EXT
5
IC2
GND
4
560
Cb
3000 pF
Q2
MMJT9410
C4
220 m F
TP8
GND
Figure 74. NCP1450A Evaluation Board Schematic Diagram 2 (Step?up
DC?DC Converter Using External Bipolar Transistor Switch)
PCB Layout Hints
Grounding
One point grounding should be used for the output power
return ground, the input power return ground, and the device
switch ground to reduce noise. In Figure 73, e.g.: C2 GND,
C1 GND, and IC1 GND are connected at one point in the
evaluation board. The input ground and output ground traces
must be thick enough for current to flow through and for
reducing ground bounce.
Power Signal Traces
Output Capacitor
The output capacitor should be placed close to the output
terminals to obtain better smoothing effect on the output
ripple.
Switching Noise Decoupling Capacitor
A 0.1 m F ceramic capacitor should be placed close to the
OUT pin and GND pin of the NCP1450A to filter the
switching spikes in the output voltage monitored by the
OUT pin.
Low resistance conducting paths should be used for the
power carrying traces to reduce power loss so as to improve
efficiency (short and thick traces for connecting the inductor
L can also reduce stray inductance), e.g.: short and thick
traces listed below are used in the evaluation board:
1. Trace from TP1 to L1
2. Trace from L1 to anode pin of D1
3. Trace from cathode pin of D1 to TP3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1450ASN33T1G | 功能描述:直流/直流开关转换器 3.3V 1A Boost DC-DC PWM RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1450ASN50T1 | 功能描述:直流/直流开关转换器 5V 1A Boost DC-DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1450ASN50T1G | 功能描述:直流/直流开关转换器 5V 1A Boost DC-DC PWM RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1450ASN50T1G | 制造商:ON Semiconductor 功能描述:Power Supply IC |
| NCP1500DMR2 | 功能描述:直流/直流开关转换器 Dual Mode PWM RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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