UCC38085 具有可编程斜率补偿的电流模式推挽 PWM
UCC38085 描述
The UCC38083/4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 110 ns, limiting each output’s duty cycle to less than 50%.
The new UCC3808x family is based on the UCC3808A architecture. The major differences include the addition of a programmable slope compensation ramp to the CS signal and the removal of the error amplifier. The current flowing out of the ISET pin through an external resistor is monitored internally to set the magnitude of the slope compensation function.
|
UCC28085 |
UCC38085 |
| Topology |
Half-Bridge, Push-Pull |
Boost, Buck, Half-Bridge, Push-Pull |
| Control Method |
Current Mode |
Current Mode |
| Duty Cycle(Max)(%) |
50 |
50 |
| Frequency(Max)(kHz) |
1000 |
1000 |
| UVLO Thresholds On/Off(V) |
12.5/8.3 |
12.5/8.3 |
| Pin/Package |
8PDIP, 8SOIC, 8TSSOP |
8PDIP, 8SOIC, 8TSSOP |
| Regulated Outputs(#) |
2 |
2 |
| Operating Temperature Range(°C) |
-40 to 85 |
0 to 70 |
| Rating |
Catalog |
Catalog |
UCC38085 特性
- Programmable Slope Compensation
- Internal Soft-Start on the UCC38083/4
- Cycle-by-Cycle Current Limiting
- Low Start-Up Current of 120 uA and 1.5 mA Typical Run Current
- Single External Component Oscillator Programmable from 50 kHz to 1 MHz
- High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
- Current Sense Discharge Transistor to Improve Dynamic Response
- Internally Trimmed Bandgap Reference
- Undervoltage Lockout with Hysteresis
- APPLICATIONS
- High-Efficiency Switch-Mode Power Supplies
- Telecom dc-to-dc Converters
- Point-of-Load or Point-of-Use Power Modules
- Low-Cost Push-Pull and Half-Bridge Applications
UCC38085 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 |
| UCC38085D |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
38085 |
| UCC38085DG4 |
ACTIVE |
-40 to 85 |
1.30 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
38085 |
| UCC38085DR |
ACTIVE |
-40 to 85 |
1.20 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
38085 |
| UCC38085DRG4 |
ACTIVE |
-40 to 85 |
1.20 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
38085 |
| UCC38085P |
ACTIVE |
-40 to 85 |
1.50 | 1ku |
PDIP (P) | 8 |
50 | TUBE |
UCC38085P |
| UCC38085PG4 |
ACTIVE |
-40 to 85 |
1.50 | 1ku |
PDIP (P) | 8 |
50 | TUBE |
UCC38085P |
| UCC38085PW |
ACTIVE |
-40 to 85 |
1.50 | 1ku |
TSSOP (PW) | 8 |
150 | TUBE |
38085 |
| UCC38085PWG4 |
ACTIVE |
-40 to 85 |
1.50 | 1ku |
TSSOP (PW) | 8 |
150 | TUBE |
38085 |
| UCC38085PWR |
ACTIVE |
-40 to 85 |
1.20 | 1ku |
TSSOP (PW) | 8 |
2000 | LARGE T&R |
38085 |
| UCC38085PWRG4 |
ACTIVE |
-40 to 85 |
1.20 | 1ku |
TSSOP (PW) | 8 |
2000 | LARGE T&R |
38085 |
UCC38085 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 |
| UCC38085D |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
UCC38085D |
| UCC38085DG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UCC38085DG4 |
UCC38085DG4 |
| UCC38085DR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
UCC38085DR |
| UCC38085DRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UCC38085DRG4 |
UCC38085DRG4 |
| UCC38085P |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
|
UCC38085P |
| UCC38085PG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
UCC38085PG4 |
UCC38085PG4 |
| UCC38085PW |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UCC38085PW |
| UCC38085PWG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC38085PWG4 |
UCC38085PWG4 |
| UCC38085PWR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UCC38085PWR |
| UCC38085PWRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC38085PWRG4 |
UCC38085PWRG4 |
UCC38085 应用技术支持与电子电路设计开发资源下载
- UCC38085 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)
UCC38085 工具与软件