UC2572 负输出反向脉宽调制器
|
UC2572 |
| Topology |
Flyback |
| Vin(Min)(V) |
4.2 |
| Vin(Max)(V) |
35 |
| Vout(Min)(V) |
-70 |
| Vout(Max)(V) |
-1 |
| Regulated Outputs(#) |
1 |
| Iout(Max)(A) |
0.5 |
| Switching Frequency(Max)(kHz) |
300 |
| Iq(Typ)(mA) |
9 |
| Pin/Package |
8PDIP, 8SOIC |
| Thermal Shutdown |
No |
| Rating |
Catalog |
| Duty Cycle(Max)(%) |
100 |
UC2572 描述
The UC3572 is a negative output flyback pulse width modulator which converts a positive input voltage to a regulated negative output voltage. The chip is optimized for use in a single inductor negative flyback switching converter employing an external PMOS switch. The block diagram consists of a precision reference, an error amplifier configured for voltage mode operation, an oscillator, a PWM comparator with latching logic, and a 0.5A peak gate driver. The UC3572 includes an undervoltage lockout circuit to insure sufficient input supply voltage is present before any switching activity can occur, and a pulse-by-pulse current limit. Output current can be sensed and limited to a user determined maximum value.
UC2572 特性
- Simple Single Inductor Flyback PWM for Negative Voltage Generation
- Drives External PMOS Switch
- Contains UVLO Circuit
- Includes Pulse-by-Pulse Current Limit
- Low 50uA Sleep Mode Current
UC2572 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 |
| UC2572D |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
UC2572D |
| UC2572DG4 |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
UC2572D |
| UC2572DTR |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
UC2572D |
| UC2572DTRG4 |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
UC2572D |
| UC2572N |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
PDIP (P) | 8 |
50 | TUBE |
UC2572N |
| UC2572NG4 |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
PDIP (P) | 8 |
50 | TUBE |
UC2572N |
UC2572 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 |
| UC2572D |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
UC2572D |
| UC2572DG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UC2572DG4 |
UC2572DG4 |
| UC2572DTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
UC2572DTR |
| UC2572DTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UC2572DTRG4 |
UC2572DTRG4 |
| UC2572N |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
|
UC2572N |
| UC2572NG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
UC2572NG4 |
UC2572NG4 |
UC2572 应用技术支持与电子电路设计开发资源下载
- UC2572 数据资料 dataSheet 下载.PDF
- TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Understanding Boost Power Stages In Switchmode Power Supplies
(PDF 149 KB)
- Understanding Buck Power Stages In Switchmode Power Supplies
(PDF 173 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)
UC2572 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| UC2572EVM 评估模块 |
UC2572EVM-092 |
Texas Instruments |
开发电路板/EVM |
UC2572 参考设计
| 说明 |
型号 |
公司 |
| Spartan™-3 电源管理解决方案（设计 1） |
PR213 |
Texas Instruments |
| Spartan™-II 电源管理解决方案（设计 3） |
PR211 |
Texas Instruments |
| Spartan™-IIE 电源管理解决方案（设计 3） |
PR212 |
Texas Instruments |
