UC2843

所属类别：ACDC-和-DCDC-电源
产品名称：汽车类电流模式 PWM 控制器
厂商：TI
生产批号：10+
封装：14SOIC, 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 UC1842/3/4/5 family provides the necessary features to achieve a fixed-frequency current mode control scheme with a minimum number of external components, either off-line or DC-to-DC. The internal implementation circuitry includes undervoltage lockout with a starting current of less than 1 mA, a precise reference accuracy fine-tuning at the input of the wrong amplifier, logic registration to ensure lockout operation, PWM comparator, while providing current limit control, and a high peak current of the source or sink of the totem pole output stage design. The output stage, driving N-channel MOSFETs are suitable for low off.

The difference between this family member is the undervoltage lockout threshold and the maximum duty cycle range.

characteristic

Optimize offline and DC-to-DC converters
低启动电流“（
Automatic feeding ForwardCompensation
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
500 - kHz operation

parameter

		UC2843
topology		Boost, reverse, forward
Control method		Current mode
Duty Cycle (Max) (%)		100
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)		-40 to 85

The ICs associated with UC2843 include:

Model	Manufacturers	lot number	encapsulation	illustrate
ISL28430	INTERSIL	12+	14TSSOP	Four micropower, low-drift, rail-to-rail input/output op-amps
ISL28433	Intersil	12+	MSOP	Four micropower rail-to-rail input and output operational amplifiers, chopper stabilization
UC2843BN	STM	10+		COMMODITY POWER
UC2843BD1G	ON	10+		COMMODITY POWER
UC2843D8TRG4	TI	10+11+	SOP-8	Hong Kong spot, imported original
UC2843DTRG4	TI	10+11+	SOP-14	Hong Kong spot, imported original
UC2843AD8G4	TI	10+	N/A	Brand new original import, Hong Kong spot
UC2843AD8TR	TI	10+	SOP	Current mode PWM controller
CS2843AL	ON	02+	DIP-8P	New original stock in stock
2SK2843-QT	N／A	05+	TO-220	N／A
2SK2843	Toshiba	03+	TO-220F	Brand new original
TL2843DR	TI	07+	SOP-14	Brand new original
2843	TI	SOP	SOP8	Brand new original
UC2843D	UC	97	SOP	New original stock in stock
UC2843BNG	ON	07+	DIP-8	Brand new original
UC2843AQ	TI	08+	14SOIC, 8SOIC	Automotive current-mode PWM controllers
UC2843A-Q1	TI	10+	8SOIC	Automotive current-mode PWM controllers
UC2843A	TI	08+	14SOIC, 20PLCC, 8PDIP, 8SOIC	Current-mode PWM controller
UC2843	TI	10+	14SOIC, 8SOIC	Automotive current-mode PWM controllers
TL2843B	TI	09+	14SOIC, 8PDIP, 8SOIC	TL284xB, TL384xB

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UC2842AQ	TI	09+10+	14SOIC, 8SOIC	Automotive current-mode PWM controllers
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UC2827-2	TI	10+	24SOIC	Drop current/voltage feed push-pull PWM controller
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UC2824	TI	09+10+	16PDIP, 16SOIC	High-speed PWM controller
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UC28025	TI	13+	16PDIP, 16SOIC	Economical, high-speed PWM controller
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UC2527A	TI	09+	16PDIP	Regulated pulse width modulator
UC2526A	TI	10+	18PDIP, 18SOIC, 20PLCC	Regulated pulse width modulator
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UC2525B	TI	07+	16SOIC	Regulated pulse width modulator
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