PMP2493 Buck Converter with Minimum Component Count to Drive LEDs
|
PMP2493 |
| 名称 |
Buck Converter with Minimum Component Count to Drive LEDs |
| 状态 |
PREVIEW |
| 价格（US$） |
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PMP2493 描述
The TPS40200 controller can be used as a low-cost LED driver. With an input voltage rating of 4.5 to 52 V, it can power LED strings with regulated current and up to a 45 V drop across the string. Current is sensed across a resistor between the cathode of the string and ground and is compared against a 696 mV reference to provide regulated current. Because the driver is a buck and not a boost or flyback, an open string will not produce voltages above the input voltage and over-voltage protection is not needed. The driver can operate in either the continuous or discontinuous mode. For output voltages above 35 V the discontinuous mode is needed due to duty cycle limitation above 35 V. The circuit shown has a Pulse Width Modulator (PWM) input for dimming purposes. Targeted current can be set with jumpers
PMP2493 应用技术支持与电子电路设计开发资源下载
- TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
PMP2493 相关产品
| 器件型号 |
名称 |
产品系列 |
| TPS40200 |
宽输入非同步降压 DC/DC 控制器 |
非隔离式开关 DC/DC 调节器 |
