供应PWM开关电源稳压器IC UC3842
| 价 格： | 面议 | |
| 型号/规格： | UC3842B,UC3842T,KA3842 | |
| 品牌/商标： | ST |
PWM开关电源集成控制器
| UC2842 | UC3842 | |
| Topology | Boost, Flyback, Forward | Boost, Buck, Flyback, Forward |
| Control Method | Current Mode | Current Mode |
| Duty Cycle(Max)(%) | 100 | 100 |
| Frequency(Max)(kHz) | 450 | 450 |
| UVLO Thresholds On/Off(V) | 16/10 | 16/10 |
| Pin/Package | 14SOIC, 8PDIP, 8SOIC | 14SOIC, 8PDIP, 8SOIC |
| Regulated Outputs(#) | 1 | 1 |
| Operating Temperature Range(°C) | -40 to 85 | 0 to 70 |
特性
- Optimized For Off-line and DC-to-DC Converters
- Low Start-Up Current (<1 mA)
- Automatic Feed ForwardCompensation
- Pulse-by-Pulse Current Limiting
- Enhanced Load Response Characteristics
- Under-Voltage Lockout With Hysteresis
- Double Pulse Suppression
- High Current Totem Pole Output
- Internally Trimmed Bandgap Reference
- 500-kHz Operation
- Low RO Error Amp
说明
The UC1842/3/4/5 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.
Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges.
- 所属城市：广东 深圳
- [联系时请说明来自维库仪器仪表网]
- 联系人： 陈树辉
- 电话：0755-82534577/13076512089
- 传真：0755-82534577
- 手机：13686868407
- QQ ：
供应信号继电器HJR1-2CL-05V/20.3*9.8*11.8
信息内容：HJR1 1-1.额定电压: 3,5,6,9,12,24VDC 1-2.线圈电阻: 见规格表 1-3.吸合电压: 见规格表 1-4.释放电压: 见规格表 1-5.额定线圈功率: 150mW、200mW 2-1.触点形式: C-二组转换 2-2.触点材料: AuAg overlay, Ag Alloy 2-3.触点负载: 1A 120VAC/24VDC 2-4.切换电压: 125VAC/30VDC 2-5.切换电流: 2A（标准型），1A（高灵敏型） 2-6.切换功率: 120VA,30W 2-7.最小切换电压电流: 5VDC,10mA 2-8.接触电阻（标准型）:Max.50mΩ(6VDC 0.1A) 2-9.寿命: 电气寿命 100,000次 机械寿命 15,000,000次 3-1.绝缘电阻: Min.1000MΩ.500VDC 3-2.介质耐压: 750VAC,1min触点与触点间(标准型） 1,000VAC,1min触点与线圈间 3-3.耐冲击电压: 1,500VAC,10x160 μs 3-4.吸合时间: Max.7ms 3-5.释放时间: Max.3ms 3-6.温度范围: -25～+70℃ 3-7.冲击: 强度 1,000m/s2 稳定性 100m/s2 3-8.振动: 强度 10 ～ 55Hz,1.5mm 双振幅 稳定性 10 ～ 55Hz,1.5mm 双振幅 3-9.相对湿度: 35%～95%RH,+40°C 3-10.重量: 约5g. ...
供应信号继电器TR5V L-S-Z-05VDC
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