UC3845A

所属类别：ACDC-和-DCDC-电源
产品名称：电流模式 PWM 控制器
厂商：TI
生产批号：10+
封装：14SOIC, 8PDIP, 8SOIC
库存状态：有库存
库存量：50000
最低订购量：1
详细资料：

Product Introduction

The control IC UC1842A/3A/4A/5A family is a pin-compatible series of improved versions of the UC3842/3/4/5 pins. Providing the necessary functions to control the current mode switching power supply, this home has the following improved features. The starting current is guaranteed to be less than 0.5 mA. The oscillator discharge is trimmed to 8.3 milliamps. In undervoltage lockout, the output stage can absorb at least 10 milliamps less than the 1.2V 5V V CC.

characteristic

Optimize offline and DC-to-DC converters
低启动电流“（
Side vibration discharge current
Automatic feedforward compensation
The pulse is limited by the pulse current
Enhanced load response characteristics
Undervoltage locking hysteresis
Dual pulse suppression
The totem pole outputs a large current
Internal fine-tuning bandgap datum
500kHz operation
Low voltage reverse osmosis error amplifier

parameter

			UC3845A
topology			Boost, buck, reverse, forward
Control method			Current mode
Duty Cycle (Max) (%)			50
Frequency (max) (kHz)			450
On/off of undervoltage lockout threshold (5)			8.4/7.6
Pin/Pack			14SOIC，8PDIP，8SOIC
(#) Regulated output			One
Operating Temperature Range (°C)			0 to 70

UC3845A-related ICs include:

Model	Manufacturers	lot number	encapsulation	illustrate
UC3845ADW	UC	9932+	SOP16	Brand new original
3845A	ST	98+	SOP-3	Original stock in stock
UC3845AD1	ST	05+	SOP-8	Brand new original
UC3845AN	ST	00+	DIP	Current PWM controller
UC3845A	TI	10+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3845AD	AKM	07+	QFN24
UC3845AD8	TI	0921+	LQFP80	PWM controller for current mode
UC3845AD	FAIRCHILD	0908+	DO-214AA

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