UC3825B 高速 PWM 控制器
UC3825B 描述
The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 µA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of 2-A peak currents during transitions.
| |
UC2825B |
UC3825B |
| Topology |
Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull |
Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull |
| Control Method |
Current Mode |
Current Mode, Voltage Mode |
| Duty Cycle(Max)(%) |
50 |
50 |
| Frequency(Max)(kHz) |
1000 |
1000 |
| UVLO Thresholds On/Off(V) |
9.2/8.4 |
9.2/8.4 |
| Pin/Package |
16PDIP, 16SOIC |
16PDIP, 16SOIC |
| Regulated Outputs(#) |
2 |
2 |
| Operating Temperature Range(°C) |
-40 to 85 |
0 to 70 |
| Rating |
Military |
Catalog |
UC3825B 特性
- Improved versions of the UC3823/UC3825 PWMs
- Compatible with Voltage-Mode or Current-Mode Control Methods
- Practical Operation at Switching Frequencies to 1MHz
- 50-ns Propagation Delay to Output
- High-Current Dual Totem Pole Outputs (2-A Peak)
- Trimmed Oscillator Discharge Current
- Low 100-µA Startup Current
- Pulse-by-Pulse Current Limiting Comparator
- Latched Overcurrent Comparator With Full Cycle Restart
UC3825B 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 |
| UC3825BDW |
ACTIVE |
0 to 70 |
6.75 | 1ku |
SOIC (DW) | 16 |
40 | TUBE |
UC3825BDW |
| UC3825BDWG4 |
ACTIVE |
0 to 70 |
6.75 | 1ku |
SOIC (DW) | 16 |
40 | TUBE |
UC3825BDW |
| UC3825BDWTR |
ACTIVE |
0 to 70 |
6.10 | 1ku |
SOIC (DW) | 16 |
2000 | LARGE T&R |
UC3825BDW |
| UC3825BDWTRG4 |
ACTIVE |
0 to 70 |
6.10 | 1ku |
SOIC (DW) | 16 |
2000 | LARGE T&R |
UC3825BDW |
| UC3825BN |
ACTIVE |
0 to 70 |
6.75 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
UC3825BN |
| UC3825BNG4 |
ACTIVE |
0 to 70 |
6.75 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
UC3825BN |
UC3825B 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 |
| UC3825BDW |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UC3825BDW |
| UC3825BDWG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UC3825BDWG4 |
UC3825BDWG4 |
| UC3825BDWTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UC3825BDWTR |
| UC3825BDWTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UC3825BDWTRG4 |
UC3825BDWTRG4 |
| UC3825BN |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
|
UC3825BN |
| UC3825BNG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
UC3825BNG4 |
UC3825BNG4 |
UC3825B 应用技术支持与电子电路设计开发资源下载
- UC3825B 数据资料 dataSheet 下载.PDF
- TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF
1305 KB)
- Analog-to-Digital Converter Grounding Practices Affect System
Performance (PDF 56 KB)
- Principles of Data Acquisition and Conversion (PDF 50 KB)
- Interleaving Analog-to-Digital Converters (PDF 64 KB)
- What
Designers Should Know About Data Converter Drift (PDF 95 KB)
- Giving Delta-Sigma Converters a Gain Boost with a Front End
Analog Gain Stage (PDF 70 KB)
- Programming Tricks for Higher Conversion Speeds Utilizing Delta
Sigma Converters (PDF 105 KB)
UC3825B 工具与软件
