KA3845集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

厂商型号	KA3845
参数属性	KA3845 封装/外壳为8-DIP（0.300"，7.62mm）；包装为散装；类别为集成电路（IC）的ACDC转换器离线开关；产品描述：IC OFFLINE SWITCH 8DIP
功能描述	CurrentMode PWM Controller
封装外壳	8-DIP（0.300"，7.62mm）
文件大小	558.75 Kbytes
页面数量	9 页
生产厂商	ETC List of Unclassifed Manufacturers
中文名称	未分类制造商
数据手册	下载地址一下载地址二
更新时间	2026-1-23 17:47:00
人工找货	KA3845价格和库存，欢迎联系客服免费人工找货

DESCRIPTION

KA3842/43/44/45 are fixed frequency current mode PWM

controller. They are specially designed for OFF−Line and DC to DC converter applications

with a minimal external components. Internally implemented circuits include a trimmed

oscillator for precise duty cycle control, a temperature compensated reference, high gain

error amplifier, current sensing comparator, and a high current totempole output ideally

suited for driving a power MOSFET. Protection circuitry includes built undervoltage lockout

and current limiting.

The UC3842A(AM) and UC3844A(AM) have UVLO thresholds of 16 V (on) and 10 V (off).

The corresponding thresholds for the UC3843A(AM)/45A(AM) are 8.4V (on) and 7.6V

(off). The UC3842A(AM) and UC3843A(AM) can operate within 100% duty cycle. The

UC3844A(AM) and UC3845A(AM) can operate within 50% duty cycle.

The UC384XA(AM) has Start-Up Current 0.17mA (typ).

FEATURES

• Low Start-Up and Operating Current

• High Current Totem Pole Output

• Undervoltage Lockout With Hysteresis

• Operating Frequency Up To 300KHz (384XA)

500KHz (384XAM