UC3846

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：16PDIP, 16SOIC, 20PLCC
库存状态：有库存
库存量：6000
最低订购量：1
详细资料：

Product Introduction

The control IC UC1846/7 family provides all the necessary functions to implement a fixed frequency, current-mode control scheme while maintaining a minimum number of external components. The superior performance of this technology improves line tuning, enhances load response characteristics, and makes it simpler and easier to control loop design. The inherent advantages of the topology include pulse through pulse current limiting functions, auto-correcting symmetrical push-pull converters, and "power modules" that can be parallelized while maintaining the current equal sharing.

The protection circuitry includes built-in undervoltage lockout and programmable current limiting except for soft-start function. A shutdown function is also available, which can be started or has an automatic full power off power restart or latch shutdown.

characteristic

Automatic feedforward compensation
Programmable pulse-by-pulse current limiting
Automatically corrects symmetrical push-pull configurations
Enhanced load response characteristics
Combat capability of modular power systems in parallel
Wide differential current-sense amplifier common mode range
Dual pulse suppression
500mA current (peak) totem pole output
± 1% bandgap reference
Undervoltage locking
Soft starting capability
Close the terminal
500kHz operation

parameter

			UC3846
topology			Boost, buck, reverse, forward, full-bridge, half-bridge, push-pull
Control method			Current mode
Duty Cycle (Max) (%)			50
Frequency (max) (kHz)			450
On/off of undervoltage lockout threshold (5)			7.7/6.95
Pin/Pack			16PDIP，16SOIC，20PLCC
(#) Regulated output			2
Operating Temperature Range (°C)			0 to 70

The ICs associated with UC3846 include:

Model	Manufacturers	lot number	encapsulation	illustrate
DP83846AVHG/NOPB		10+11+		Hong Kong spot, imported original
SG3846DW	LINFINITY	00+	SOP-16P	New original stock in stock
UC3846Q	UNITRODE	01+	PLCC-28P	New original stock in stock
DP83846AVHGC4	NSC	00+	TQFP-80P	New original stock in stock
UC3846N	TI/FAIRCHILD	02+	DIP-16	Brand new original
SG3846N	LINFINITY	01+	DIP-16P	New original stock in stock
UC3846	TI	10+	16PDIP, 16SOIC, 20PLCC	Current-mode PWM controller
UC3846DW	ON	06+	SOP-20
UC3846DW	TI/BB	09+	TQFP48
KA3846	FSC	09+/10+	DIP-16
KA3846	FSC	07+	DIP-16
KA3846	FSC	07+	DIP-16
KA3846	FAIRCHILD	08+	DIP-16
KA3846	FAIRCHILD	08/09+	DIP-16

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TI brand product recommendation

Model	Manufacturers	lot number	encapsulation	illustrate
UC3845A	TI	10+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3845	TI	09+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3844A	TI	08+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3844	TI	10+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3843A	TI	10+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3842A	TI	10+	14SOIC, 16SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3842	TI	10+	14SOIC, 8PDIP, 8SOIC	Current-mode PWM controller
UC3841	TI	10+	18PDIP, 18SOIC	Programmable offline PWM controller
UC3827-2	TI	10+	24PDIP, 24SOIC	Drop current/voltage feed push-pull PWM controller
UC3827-1	TI	10+	24PDIP, 24SOIC	Drop current/voltage feed push-pull PWM controller
UC3825B	TI	09+	16PDIP, 16SOIC	High-speed PWM controller
UC3825A	TI	08+	16PDIP, 16SOIC, 20PLCC	High-speed PWM controller
UC3825	TI	09+	16PDIP, 16SOIC, 20PLCC	High-speed PWM controller
UC3824	TI	08+	16PDIP, 16SOIC	High-speed PWM controller
UC3823B	TI	09+	16PDIP, 16SOIC	High-speed PWM controller
UC3823A	TI	09+	16PDIP, 16SOIC	High-speed PWM controller
UC3823	TI	09+	16PDIP, 16SOIC, 20PLCC	High-speed PWM controller
UC3527B	TI	08+	16PDIP	Regulated pulse width modulator
UC3527A	TI	10+	16PDIP	Regulated pulse width modulator
UC3526A	TI	08+	18PDIP, 18SOIC, 20PLCC	Regulated pulse width modulator

UC3846

parameter

The ICs associated with UC3846 include:

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