UC3841

所属类别：ACDC-和-DCDC-电源
产品名称：可编程脱机 PWM 控制器
厂商：TI
生产批号：10+
封装：18PDIP, 18SOIC
库存状态：有库存
库存量：2000
最低订购量：1
详细资料：

Product Introduction

The family of PWM controllers UC1841 has been designed to increase, but retain the versatility of the performance level of all the functional devices of the earlier UC1840. While there are still flyback converters on the primary side that are in short supply chain to be advanced or operationally optimized, the UC1841 is also adept at implementing low and high voltage input DC-to-DC converters. Important performance features include a low-current start-up circuit, linear feedback constant voltage second operation, and advance with voltage or current mode topological exponential.

In addition to boot and normal PWM regulation, these devices include built-in over-voltage, under-voltage, over-current fault condition protection, and any latching or auto-restart options.

characteristic

All control, drive, monitoring and protection functions include:
Low current, offline start circuit
Feedforward voltage or current mode control
Ensure duty cycle clamping
PWM latches are single pulses per cycle
Pulse limit, pulse current, overcurrent fault, shutdown
There are no start-up or shutdown transients
Slow start, shutdown after these two initial and faults
Too high or too low voltage sensing after shutdown
Continuous locking or failure and then retrying
Practical PWM output switch peak current of 1A
1% benchmark accuracy
500kHz operation
18-pin dual in-line package

parameter

		UC3841
topology		Boost, reverse, forward
Control method		Current mode, voltage mode
Duty Cycle (Max) (%)		95
Frequency (max) (kHz)		450
On/off of undervoltage lockout threshold (5)		8/7.8
Pin/Pack		18PDIP，18SOIC
(#) Regulated output		One
Operating Temperature Range (°C)		0 to 70

ICs related to UC3841 include:

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038418-0008	ITT Cannon	10+		038418-0008 25
038418-0004	ITT Cannon	10+		038418-0004 49
038415-0006	ITT Cannon	10+		038415-0006 44
038415-0004	ITT Cannon	10+		038415-0004 197
LC384161CT-12	Sanyo	00+	TSOP-50	Original
UC3841N	UNITRODE	01+	DIP-18P	New original stock in stock
BD3841FS	ROHM	04+	SSOP-32	Brand new original
UC3841DW	TI	08+	SOP-18	Brand new original
HFA3841CN	intersil	02+	TQFP-128	N/A
UC3841	TI	10+	18PDIP, 18SOIC	Programmable offline PWM controller
TPS23841PAPR	TI	0719+	TQFP-64

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UC3841

parameter

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