UCD7231 具有电流感应和故障保护功能的数字控制兼容同步降压闸极驱动器
UCD7231 描述
The UCD7231 high current driver is specifically designed for digitally-controlled, point-of-load, synchronous buck switching power supplies. Two driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6 V by an internally regulated VGG supply. The internal VGG regulator can be disabled to permit the user to supply their own gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2 to 15 V. Internal under voltage lockout (UVLO) logic insures VGG is good before allowing chip operation.
A drive logic block allows operation in one of two modes selected by the SRE Mode pin
|
UCD7230 |
UCD7230A |
UCD7231 |
| No. of Outputs |
1 |
1 |
1 |
| Driver Configuration |
Dual |
Dual |
Dual |
| VCC(Min)(V) |
4.5 |
4.5 |
4.7 |
| VCC(Max)(V) |
15 |
15 |
15 |
| Peak Output Current(A) |
4 |
4 |
6 |
| Prop Delay(ns) |
30 |
30 |
50 |
| Input Threshold |
CMOSTTL |
CMOSTTL |
COMSTTL |
| Pin/Package |
20HTSSOP, 20VQFN |
20VQFN |
20QFN |
| Operating Temperature Range(°C) |
-40 to 105 |
-40 to 105 |
-40 to 125 |
UCD7231 特性
- Dual High Current Drivers.
- Full Compatibility with TI Fusion Digital Power Supply Controllers, such as UCD91xx and UCD92xx Families
- Operational to 2 MHz Switching Frequency
- High-Side FET and Output Current Limit Protection with Independently Adjustable Thresholds
- Fast High-Side Over-Current Sense Circuit with Fault Flag Output – Prevents Catastrophic Current Levels on a Cycle by Cycle Basis
- Differential High-Gain Current Sense Amplifier
- Voltage Proportional to Load Current Monitor Output
- Wide Input Voltage Range: 4.7 V to 15 V
Operation to 2.2 V Input Supported with an External 4.5-6.5 V Bias Supply
- Onboard Regulated Supplies for Gate Drive and Internal Circuits
- Integrated Thermal Shutdown
- Selectable Operation Modes:
- PWM plus Synchronous Rectifier Enable (SRE) with Automatic Dead-Time Control
- Direct High-Gate and Low-Gate Inputs for Direct FET Control
- 3-State PWM Input for Power Stage Shutdown
- UVLO Housekeeping Circuit
- Rated from –40°C to +125°C Junction Temperature
- Pb (Lead) Free Packaging
- APPLICATIONS
- Digitally-Controlled Synchronous-Buck Power Stages for Single- and Multi-Phase Applications
- Digitally-Controlled Power Modules
UCD7231 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 |
| UCD7231RTJR |
ACTIVE |
-40 to 125 |
2.65 | 1ku |
QFN (RSJ) | 32 |
2500 | LARGE T&R |
|
| UCD7231RTJT |
ACTIVE |
-40 to 125 |
3.05 | 1ku |
QFN (RSJ) | 32 |
250 | SMALL T&R |
|
UCD7231 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 |
| UCD7231RTJR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UCD7231RTJR |
UCD7231RTJR |
| UCD7231RTJT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UCD7231RTJT |
UCD7231RTJT |
UCD7231 应用技术支持与电子电路设计开发资源下载
- UCD7231 数据资料 dataSheet 下载.PDF
- TI 德州仪器Fusion Digital Power(TM) 控制驱动器产品选型与价格 . xls
- 照明和显示屏电源选择指南 (PDF 1427 KB)
- QFN Layout Guidelines (PDF 1279 KB)
- 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- PowerPADTM Made Easy (PDF 57 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)
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