BD5469GUL中文资料内置ALC 单声道D类扬声器放大器数据手册ROHM规格书

描述 Description

BD5469GUL是内置了手机、便携式电子设备等移动、音频产品用ALC功能的单声道D类扬声器放大器。扬声器输出无需使用LC滤波器，可由3个外接部件构成单声道扬声器放大器。ALC是Automatic Level Control的缩写，该功能可在输入过大时自动调整至输出波形失真（削波）的减少电平。其具有降低削波噪音实现高音质、防止过大输出以保护扬声器的优点。至输出电平的限制解除动作的时间称作释放时间（或恢复时间）。本IC采用适合播放音乐的释放时间(262ms/1dB Typ)。与D类动作相比效率高、功耗低，适用于电池驱动应用。关断时的消耗电流低至0.01µA (Typ)，从关断到动作的启动快且爆破音小，适用于重复进行关断、激活的用途。

特性 Features

• Integrated Digital ALC
(Automatic Level Control) Function.
• External parts : 3 components.
• Ultra slim type package : 9 pin WL-CSP
(1.7×1.7×0.55mmMax).
• Pin Compatible Specs.
BD5460/61GUL (No ALC Function, Fixed Output Gain)
BD5465/66/68GUL (ALC Function, Fixed Output Gain)
• ALC release (recovery) time : 262ms/1dB (Typ).
• Output Power Limit
0.88W (Typ) [VDD=4.2V, RL=8Ω, THD+N ≤ 1%]
0.9W (Typ) [VDD=3.7V, RL=6Ω, THD+N ≤ 1%]
0.64W (Typ) [VDD=3.6V, RL=8Ω, THD+N ≤ 1%]
• Audio Analog Input (has option for either single-end
input or differential input).
• No need for output LC filter
• Pop noise suppression circuit
• Shutdown Mode (used as mute at the same time)
[low shutdown current = 0.01µA (Typ)]
• Built-in protection circuits : output short protection,
high temperature protection, under voltage protection