R1242中文资料3A 30V输入带同步整流器功能和外置低侧晶体管的PWM降压DC/DC转换器数据手册Nisshinbo规格书

描述 Description

The R1242 Series are 30V input, CMOS-based PWM step-down DC/DC converters featuring 3A* output current. R1242 includes a soft start circuit and a latch or fold-back protection circuit. By simply using an inductor, resistors, a low side switch (FET), and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. Due to current mode PWM control, the R1242 provides a fast response and high efficiency.

*) This is an approximate value, because output current depending on conditions and external parts.

特性 Features

• Input Voltage Range (Maximum Rating)：5 V to 30 V (32 V)；
• Supply Current：Typ. 0.8 mA (VIN = 30 V, Set VFB = 1.0 V)；
• Standby Current：Typ. 0 µA (VIN = 30 V, CE = L)；
• Output Voltage Range：0.8 V to 15 V, Adjustable using external resistors；
• Feed Back Voltage Accuracy：0.8 V with 1.5% accuracy；
• Output Current：3 A*；
• Oscillator Frequency：330 kHz to 1 MHz (Ver. A/B), 330 kHz (Ver. C/D), 500 kHz, (Ver. E/F), 1000 kHz (Ver. G/H)；
• Maximum Duty Cycle：Typ. 88%；
• UVLO Detector Threshold：Typ. 3.6 V；
• Soft-start Time：Typ. 0.5 ms；
• Peak Current Limit：Typ. 4.5 A；
• Thermal Shutdown：Typ. 160°C；
• Latch Type Protection：Delay Time: Typ. 5 ms (Ver. A/C/E/G)；
• Fold-back Type Protection：Fold-back Frequency: Ver. B: fosc x 1/4, Ver. D: 83 kHz, Ver. F: 125 kHz, Ver. H: 250 kHz；
• Package：HSOP-8E；

应用 Application

• Digital Home Appliances: Digital TVs, DVD Players
• Office Automation Equipment: Printers, Fax
• Hand-held Communication Equipment: Cameras, Video Recorders
• Battery-powered Equipment

简介

R1242属于集成电路（IC）的DCDC开关稳压器。由制造生产的R1242稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。