UC1825 高速 PWM 控制器
The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.
Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current
|
UC1825 |
| Topology |
Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull |
| Control Method |
Current |
| Duty Cycle (Max) (%) |
50 |
| Frequency (Max) (kHz) |
1000 |
| UVLO Thresholds On/Off (V) |
9.2/8.4 |
| Pin/Package |
16CDIP, 16CFP, 20LCCC |
| Vin (Min) (V) |
8.4 |
| Vin (Max) (V) |
30 |
| Regulated Outputs (#) |
2 |
| Operating Temperature Range (C) |
-55 to 125 |
| Rating |
Military |
UC1825 特性
- Compatible with Voltage or Current Mode Topologies
- Practical Operation Switching Frequencies to 1MHz
- 50ns Propagation Delay to Output
- High Current Dual Totem Pole Outputs (1.5A Peak)
- Wide Bandwidth Error Amplifier
- Fully Latched Logic with Double Pulse Suppression
- Pulse-by-Pulse Current Limiting
- Soft Start / Max. Duty Cycle Control
- Under-Voltage Lockout with Hysteresis
- Low Start Up Current (1.1mA)
UC1825 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 |
| 5962-87681012A |
ACTIVE |
-55 to 125 |
24.47 | 100u |
LCCC (FK) | 20 |
1 | TUBE |
|
| 5962-8768101EA |
ACTIVE |
-55 to 125 |
16.46 | 100u |
CDIP (J) | 16 |
1 | TUBE |
|
| 5962-8768101QFA |
ACTIVE |
-55 to 125 |
28.60 | 100u |
CFP (W) | 16 |
1 | TUBE |
|
| UC1825J |
ACTIVE |
-55 to 125 |
11.53 | 100u |
CDIP (J) | 16 |
1 | TUBE |
|
| UC1825J883B |
ACTIVE |
-55 to 125 |
16.46 | 100u |
CDIP (J) | 16 |
1 | TUBE |
|
| UC1825L |
ACTIVE |
-55 to 125 |
16.69 | 100u |
LCCC (FK) | 20 |
1 | TUBE |
|
| UC1825L883B |
ACTIVE |
-55 to 125 |
24.47 | 100u |
LCCC (FK) | 20 |
1 | TUBE |
|
| UC1825W883B |
ACTIVE |
-55 to 125 |
28.60 | 100u |
CFP (W) | 16 |
1 | TUBE |
|
UC1825 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 |
| 5962-87681012A |
TBD |
Call TI |
Call TI |
5962-87681012A |
5962-87681012A |
| 5962-8768101EA |
TBD |
Call TI |
Call TI |
5962-8768101EA |
5962-8768101EA |
| 5962-8768101QFA |
TBD |
Call TI |
Call TI |
5962-8768101QFA |
5962-8768101QFA |
| UC1825J |
TBD |
A42 |
N/A for Pkg Type |
UC1825J |
UC1825J |
| UC1825J883B |
TBD |
A42 |
N/A for Pkg Type |
UC1825J883B |
UC1825J883B |
| UC1825L |
TBD |
POST-PLATE |
N/A for Pkg Type |
UC1825L |
UC1825L |
| UC1825L883B |
TBD |
POST-PLATE |
N/A for Pkg Type |
UC1825L883B |
UC1825L883B |
| UC1825W883B |
TBD |
A42 |
N/A for Pkg Type |
UC1825W883B |
UC1825W883B |
UC1825 工具与软件
UC1825 应用技术支持与电子电路设计开发资源下载
- UC1825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
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