3 说明
TPS61194-Q1 是一款集成 DC-DC 转换器的低电磁干扰 (EMI) 且易于使用的汽车类高效 LED 驱动器。DC-DC 转换器支持升压和 SEPIC 工作模式。该器件具备的四路高精度电流阱可进行组合,以提高电流能力。
DC-DC 转换器可基于 LED 电流阱余量电压提供自适应输出电压控制。该特性可在所有条件下将电压调节到能够满足需要的最低水平,从而最大限度降低功耗。为了降低 EMI,DC-DC 转换器支持针对开关频率进行扩频以及使用专用引脚实现外部同步。凭借较大的可调节频率范围,TPS61194-Q1 能够避免调幅无线电频带干扰。
TPS61194-Q1 的输入电压范围为 4.5V 至 40V,支持汽车启动/停止以及负载突降情况。TPS61194-Q1 集成了丰富的故障检测 功能的反馈。
器件型号 |
封装 |
封装尺寸(标称值) |
TPS61194-Q1 |
HTSSOP (20) |
6.50mm x 4.40mm |
- 要了解所有可用封装,请参见数据表末尾的可订购产品附录。
4 修订历史记录
Changes from C Revision (April 2017) to D Revision
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Enhanced pin descriptions for pins 3, 10 and 16 in Pin Functions Go
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Deleted "Dimming ratio is calculated as ratio between the input PWM period and minimum on/off time (0.5 µs). " from Brightness ControlGo
Changes from B Revision (October 2016) to C Revision
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Deleted "IOUT = 100 mA" from tON/OFF row of Table 7.9Go
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Changed "0.5" from MAX to TYP column in tON/OFF row of Table 7.9 Go
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Added table note 1 for Tables 7.9 and 7.10Go
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Deleted "Initial DC-DC voltage is about 88% of VMAX BOOST." from Integrated DC-DC Converter; change wording in last sentence before equation 1.Go
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Changed eq. 1; added "K" eq definitions for eq. 1 and paragraph after Fig. 9 Go
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Added new paragraph before Internal LDOGo
Changes from A Revision (January 2016) to B Revision
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Deleted 特性中多个条目的措辞 Go
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Changed “输出电流”至“LED 灯串电流”以及“200Hz 频率下的调光比率高达 10000:1”至“100Hz 频率下的调光比率高达 10000:1”Go
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Added 其他应用 Go
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Changed 说明中的多处措辞 - 为了清晰起见Go
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Changed “高开关频率”更改为“宽范围可调频率”Go
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Added 器件比较表Go
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Added 2 new LED Current graphsGo
Changes from * Revision (December 2015) to A Revision