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BM28723AMUV 参数 Datasheet PDF下载

BM28723AMUV图片预览
型号: BM28723AMUV
PDF下载: 下载PDF文件 查看货源
内容描述: [BM1050AF是组合了应对高次谐波的功率因数校正(Power Factor Correction)转换器(以下简称PFC部)与DC/DC转换器(以下简称DC/DC部)的复合LSI。DC/DC部采用准谐振方式动作,有助于实现低EMI。BM1050AF内置650V耐压启动电路。PFC部、DC/DC部均外接开关MOSFET及电流检测电阻,可实现自由度高的电源设计。PFC部采用峰值电流控制。利用带AC电压过低补偿电路的乘法器、应对负载变动的电路、最大功率补偿电路等各种保护电路,提供合适的应用方案。此外,内置跳频功能,有助于实现低EMI。DC/DC部的准谐振方式为软开关动作,有助于实现低EMI。内置脉冲串模式,可降低轻负载时的功耗。内置了软启动功能、脉冲串功能、逐周期过电流限制、过电压保护、过负荷保护等各种保护功能。与微控制器间设有通信控制用端子、外部停止端子,可提供适用于各种应用的系统方案。]
分类和应用: 通信开关控制器微控制器软启动脉冲功率因数校正转换器
文件页数/大小: 82 页 / 5460 K
品牌: ROHM [ ROHM ]
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BM28723AMUV  
13 Protection Function continued  
13.4 High Temperature Protection  
This LSI has the high temperature protection circuit that prevents from thermal runaway under an abnormal state for  
the temperature of the chip to exceed Tj=150°C(Min).  
Detecting condition - It will detect when MUTEX pin is set to high and the temperature of the chip becomes 150°C  
(Min) or more. The speaker output immediately transitions to the state of High-Z_low.  
Releasing condition - It will release when MUTEX pin is set to high and the temperature of the chip becomes 120°C  
(Min) or less. If this protection is released, the PWM output pin return to output PWM signal  
state (Auto recovery).  
Temparature of  
IC chip junction ()  
150 °C(Min)  
120°C(Min)  
t
OUT1P (25pin)  
OUT1N (21pin)  
OUT2P (20pin)  
OUT2N (16pin)  
PWM out: High-Z_low  
t
Speaker  
BTL output  
(After LC filter)  
t
ERRORX (13pin)  
t
Figure 48. High Temperature Protection Sequence  
www.rohm.com  
TSZ02201-0C1C0E900720-1-2  
© 2018 ROHM Co., Ltd. All rights reserved.  
32/79  
TSZ22111 15 001  
31.Aug.2018 Rev.001  
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