TPS61042 采用 QFN-8 封装的 30V 500mA 开关升压转换器，用于白光 LED 应用领域
TPS61042 描述
The TPS61042 is a high frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typ). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured where the brightness can be controlled by an analog signal as well. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground
|
TPS61040 |
TPS61041 |
TPS61042 |
TPS61043 |
TPS61045 |
| Topology |
Boost |
Boost |
Boost |
Boost |
Boost |
| Type |
Inductive |
Inductive |
Inductive |
Inductive |
Inductive |
| Vin(Min)(V) |
1.8 |
1.8 |
1.8 |
1.8 |
1.8 |
| Vin(Max)(V) |
6 |
6 |
6 |
6 |
6 |
| Switch Current Limit(Typ)(A) |
0.4 |
0.25 |
0.5 |
0.5 |
0.45 |
| Output Voltage(Max)(V) |
28 |
28 |
28 |
16.9 |
28 |
| Switching Frequency(Max)(kHz) |
1000 |
1000 |
1000 |
1000 |
1000 |
| LED(#) |
6 |
4 |
6 |
4 |
1 OLED or 6 |
| LED Configuration |
Series |
Series |
Series |
Series |
Series |
| Over-Voltage Protection(Min)(V) |
|
|
28 |
17 |
|
| Peak Efficiency(%) |
86 |
85 |
85 |
85 |
|
| Iq(Typ)(mA) |
0.028 |
0.028 |
0.038 |
0.038 |
0.04 |
| Operating Temperature Range(°C) |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
| Pin/Package |
5SOT-23, 6SON |
5SOT-23, 6SON |
8SON |
8SON |
8SON |
| Iout(Max)(A) |
0.09 |
0.05 |
0.03 |
0.03 |
0.02 |
| Regulated Outputs(#) |
1 |
1 |
1 |
1 |
1 |
TPS61042 特性
- Current Source With Overvoltage Protection
- Input Voltage Range . . 1.8 V to 6 V
- Internal 30 V Switch
- Up to 85% Efficiency
- Precise Brightness Control Using PWM Signal or Analog Signal
- Switching Frequency . . Up to 1 MHz
- Internal Power MOSFET Switch . . 500 mA
- Operates With Small Output Capacitors Down to 100 nF
- Disconnects LEDs During Shutdown
- No Load Quiescent Current . . 38 µA Typ
- Shutdown Current . . 0.1 µA Typ
- Available in a Small 3 mm × 3 mm QFN Package
- APPLICATIONS
- White LED Supply for Backlight/Sidelight Displays
- PDA, Pocket PC, Smart Phones
- Handheld Devices
- Cellular Phones
TPS61042 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 |
| TPS61042DRBR |
ACTIVE |
-40 to 85 |
0.85 | 1ku |
SON (DRB) | 8 |
3000 | LARGE T&R |
BHS |
| TPS61042DRBRG4 |
ACTIVE |
-40 to 85 |
0.85 | 1ku |
SON (DRB) | 8 |
3000 | LARGE T&R |
BHS |
| TPS61042DRBT |
ACTIVE |
|
0.90 | 1ku |
SON (DRB) | 8 |
250 | SMALL T&R |
BHS |
| TPS61042DRBTG4 |
ACTIVE |
|
0.90 | 1ku |
SON (DRB) | 8 |
250 | SMALL T&R |
BHS |
TPS61042 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 |
| TPS61042DRBR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS61042DRBR |
| TPS61042DRBRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TPS61042DRBRG4 |
TPS61042DRBRG4 |
| TPS61042DRBT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS61042DRBT |
| TPS61042DRBTG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TPS61042DRBTG4 |
TPS61042DRBTG4 |
TPS61042 应用技术支持与电子电路设计开发资源下载
- TPS61042 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)
TPS61042 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| 用于具有 PWM 亮度控制的恒流白光 LED 电源的 TPS61042 EVM |
TPS61042EVM-226 |
Texas Instruments |
开发电路板/EVM |
