TPS60251 具有 I2C 接口的用于 7 个 WLED 的高效充电泵
TPS60251 描述
The TPS60251 is a high efficiency, constant frequency charge pump DC/DC converter that uses a dual mode 1× and 1.5× conversion to maximize efficiency over the input voltage range. It drives up to five white LEDs for a main display and up to two white LEDs for a sub display with regulated constant current for uniform intensity. By utilizing adaptive 1×/1.5× charge pump modes and very low-dropout current regulators, the TPS60251 achieves high efficiency over the full 1-cell lithium-battery input voltage range.
Four enable inputs, ENmain, ENsub1, ENsub2, and ENaux, available through I2C, are used for simple on/off controls for the main, sub1, sub2, and DM5 displays, respectively. To lower operating current when using one sub display LED, the device provides independent operation in sub display LEDs.
|
TPS60250 |
TPS60251 |
TPS60252 |
TPS60255 |
| Topology |
Boost |
Boost |
Boost |
Boost |
| Type |
Capacitive |
Capacitive |
Capacitive |
Capacitive |
| Vin(Min)(V) |
3 |
3 |
3 |
2.7 |
| Vin(Max)(V) |
6 |
6 |
6 |
6 |
| Output Voltage(Max)(V) |
6.5 |
6.5 |
6.5 |
6.6 |
| Switching Frequency(Max)(kHz) |
750 |
750 |
750 |
750 |
| LED(#) |
4+2+1 |
4+2+1 |
4+2+1 |
4+2+1 |
| LED Configuration |
Parallel |
Parallel |
Parallel |
Parallel |
| Peak Efficiency(%) |
93 |
93 |
93 |
93 |
| Iq(Typ)(mA) |
0.068 |
0.068 |
0.068 |
0.068 |
| Operating Temperature Range(°C) |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
| Pin/Package |
16WQFN |
24QFN |
16WQFN |
16WQFN |
| Iout(Max)(A) |
0.23 |
0.23 |
0.23 |
0.23 |
| I2C Address |
1110111 |
1110111 |
1110110 |
EasyScale(TM) |
TPS60251 特性
- 3.0-V to 6.0-V Input Voltage Range
- ×1 and ×1.5 Charge Pump
- Fully Programmable Current with I2C
- 64 Dimming Steps with 25mA Maximum (Sub and Main Display Banks)
- 4 Dimming Steps with 80mA Maximum (DM5 for Auxiliary Application)
- 2% Current Matching for Sub LEDs at Light Load Condition (Each 100µA)
- 750-kHz Charge Pump Frequency
- Continuous 230-mA Maximum Output Current
- Auto Switching Between ×1 and ×1.5 Mode for Maximum Efficiency
- Built-in Soft Start and Current Limit
- Hardware Enable/Disable
- Open Lamp Detection
- 24-Pin 4mm x 4mm QFN
- APPLICATIONS
- Cellular Phones
- PDA, PMP, GPS (Up To 4 Inch Display)
- Multidisplay Handheld Devices
TPS60251 芯片订购指南
| 器件 |
状态 |
温度 |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TPS60251RTWR |
ACTIVE |
-40 to 85 |
0.90 | 1ku |
QFN (RTW) | 24 |
3000 | LARGE T&R |
TPS60251 |
| TPS60251RTWRG4 |
ACTIVE |
-40 to 85 |
0.90 | 1ku |
QFN (RTW) | 24 |
3000 | LARGE T&R |
TPS60251 |
| TPS60251RTWT |
ACTIVE |
-40 to 85 |
0.99 | 1ku |
QFN (RTW) | 24 |
250 | SMALL T&R |
TPS60251 |
| TPS60251RTWTG4 |
ACTIVE |
-40 to 85 |
0.99 | 1ku |
QFN (RTW) | 24 |
250 | SMALL T&R |
TPS60251 |
TPS60251 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 |
| TPS60251RTWR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS60251RTWR |
| TPS60251RTWRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TPS60251RTWRG4 |
TPS60251RTWRG4 |
| TPS60251RTWT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS60251RTWT |
| TPS60251RTWTG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TPS60251RTWTG4 |
TPS60251RTWTG4 |
TPS60251 应用技术支持与电子电路设计开发资源下载
- TPS60251 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)
TPS60251 相关工具
TPS60251 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 |
