UC1843-SP QML V 类电流模式 PWM 控制器
The UC1843 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. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.
|
UC1843-SP |
| Topology |
Boost,Flyback,Forward |
| Duty Cycle (Max) (%) |
100 |
| Frequency (Max) (kHz) |
450 |
| UVLO Thresholds On/Off (V) |
8.4/7.6 |
| Pin/Package |
20LCCC, 8CDIP |
| Regulated Outputs (#) |
1 |
| Operating Temperature Range (C) |
-55 to 125 |
| Rating |
Space |
UC1843-SP 特性
- QML-V Qualified, SMD 5962-86704
- Rad-Tolerant: 50 kRad (Si) TID (ELDRS Free)(1)
- Controlled Baseline
- Optimized For Off-line and DC-to-DC Converters
- Low Start-Up Current (<1 mA)
- Automatic Feed Forward Compensation
- 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
UC1843-SP 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| 5962-8670402VPA |
ACTIVE |
-55 to 125 |
113.95 | 100u |
CDIP (JG) | 8 |
1 | TUBE |
|
| 5962-8670402VXA |
ACTIVE |
-55 to 125 |
155.66 | 100u |
LCCC (FK) | 20 |
1 | TUBE |
|
| 5962-8670410V9A |
ACTIVE |
-55 to 125 |
299.00 | 100u |
XCEPT (KGD) | 0 |
100 |
|
| 5962-8670410VPA |
ACTIVE |
-55 to 125 |
311.13 | 100u |
CDIP (JG) | 8 |
1 |
|
UC1843-SP 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| 5962-8670402VPA |
TBD |
A42 |
N/A for Pkg Type |
5962-8670402VPA |
5962-8670402VPA |
| 5962-8670402VXA |
TBD |
POST-PLATE |
N/A for Pkg Type |
5962-8670402VXA |
5962-8670402VXA |
| 5962-8670410V9A |
TBD |
Call TI |
N/A for Pkg Type |
5962-8670410V9A |
5962-8670410V9A |
| 5962-8670410VPA |
TBD |
A42 |
N/A for Pkg Type |
5962-8670410VPA |
5962-8670410VPA |
UC1843-SP 工具与软件
UC1843-SP 应用技术支持与电子电路设计开发资源下载
- UC1843-SP数据资料 dataSheet 下载.PDF
- TI 德州仪器电源管理选型与价格参考 . xls
