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本文介绍一种用普通12V电瓶即可随时随地“发烧”的大功率音响电源,这种电瓶音响电源非常适合停电频繁的卡拉OK歌舞厅、影剧院、车船音响、牧民移动式歌舞团以及音响发烧友们使用。 一、性能特点 电瓶音响电源采用新型多功能DC/AC控制变换电路UPK2440为核心,对12V电瓶电源以高速开关方式进行升压变换,在输出端可得到稳定度极佳的正负双极性稳压源。这种电源工作频率为50KHz,超过工频电源的一千倍,因此滤波电容可以用得很小,其升压变压器也很小,与传统工频电源相比,不仅体积小、重量轻、便于携带,而且具有如下优点:(1)无常规电源100Hz纹波和交流声干扰;(2)功率余量大,标称容量为最大值的70％;(3)动态内阻低;(4)电源变换效率高;(5)高精度稳压性能;(6)设有电瓶欠压、过流等保护功能,安全可靠。
This article describes a common 12V battery can be anytime, anywhere “fever” high-power audio power supply, this battery power supply is ideal for frequent power cuts karaoke OK song and dance halls, theaters, car audio, pastoral mobile song and dance groups and audio enthusiasts use. First, the performance characteristics of the battery audio power supply using a new multi-function DC / AC control converter circuit UPK2440 as the core of the 12V battery power switch to high-speed switching mode, the output can be excellent stability of the positive and negative bipolar stability Pressure source. This power supply frequency of 50KHz, more than a thousand times the power frequency power supply, so the filter capacitor can be used very small, the step-up transformer is also small, compared with the traditional power supply, not only small size, light weight, easy (2) The power margin is large, the nominal capacity is 70% of the maximum value; (3) The dynamic internal resistance is low; (4) High power conversion efficiency; (5) high-precision voltage regulation performance; (6) with a battery undervoltage, overcurrent and other protection features, safe and reliable.