The TPS6103x devices provide a power supply solution for products powered by either a one-cell Li-Ion or Li-polymer, or a two to three-cell alkaline, NiCd or NiMH battery. The converter generates a stable output voltage that is either adjusted by an external resistor divider or fixed internally on the chip. It provides high efficient power conversion and is capable of delivering output currents up to 1 A at 5 V at a supply voltage down to 1.8 V. The implemented boost converter is based on a fixed frequency, pulse-width- modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. At low load currents the converter enters Power Save mode to maintain a high efficiency over a wide load current range. The Power Save mode can be disabled, forcing the converter to operate at a fixed switching frequency. It can also operate synchronized to an external clock signal that is applied to the SYNC pin. The maximum peak current in the boost switch is limited to a value of 4500 mA.
The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. A low-EMI mode is implemented to reduce ringing and, in effect, lower radiated electromagnetic energy when the converter enters the discontinuous conduction mode.
德克萨斯仪器tps61030pwpr
的tps6103x设备提供了一个细胞Li Ion或锂聚合物动力产品的电源解决方案,或一个两到三碱性电池,镍镉或镍氢电池。该转换器产生稳定的输出电压,该电压可由外部电阻分压器调节或在芯片内部固定。它提供高效率的电源转换,并能够提供输出电流高达1 A在5 V的电源电压下降到1.8 V。实施升压转换器是基于一个固定频率,脉冲宽度调制(PWM)控制器使用同步整流器,以获得最大的效率。在低负载电流下,转换器进入省电模式,在宽负载电流范围内保持高效率。省电模式可以被禁用,迫使转换器在固定的开关频率下工作。它还可以与应用于同步引脚的外部时钟信号同步工作。升压开关中的最大峰值电流被限制为4500毫安的值。
可以禁用转换器,以最大限度地减少电池消耗。关机时,负载完全脱离电池。一种低EMI模式实现,以减少振铃,实际上,低辐射电磁能量时,转换器进入不连续的传导模式。
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