UC3848

所属类别：ACDC-和-DCDC-电源
产品名称：平均电流模式 PWM 控制器
厂商：TI
生产批号：09+
封装：16PDIP, 16SOIC
库存状态：有库存
库存量：2600
最低订购量：1
详细资料：

Product Introduction

The PWM control IC UC3848 series makes the primary side average current mode controlled isolator switch converter practical. Average current mode control ensures that the peak switching current and maximum average inductor current for both cycles are clear and will not be operated in a very short circuit. The UC3848 can be used to control converters for multiple topologies.

In addition to the basic functions required for pulse width modulation, the UC3848 implements a patented technology for sensing the primary and secondary currents of a step-down converter isolated from the primary side. A current waveform synthesizer and analog display switch current inductor downhill, so that a complete current waveform can build up current on the primary and secondary sides without actually measuring the current.

characteristic

The secondary control current of the primary control IC of the practical isolation power supply is controlled
Precisely programmable maximum duty cycle clamping
Maximum volt-second product clamp to prevent core saturation
Actual operation up to 1MHz
High current (peak A) totem pole output driver
Wideband (8MHz) current error amplifier
The undervoltage locks the monitor's VCC, VIN and VREF
Output low level during UVLO
Low start-up current (500μA)
Precision 5V Reference (1%)

parameter

		UC3848
topology		Boost, reverse, forward
Control method		Current mode
Duty Cycle (Max) (%)		100
Frequency (max) (kHz)		450
On/off of undervoltage lockout threshold (5)		13/10
Pin/Pack		16PDIP，16SOIC
(#) Regulated output		One
Operating Temperature Range (°C)		0 to 70

The ICs associated with UC3848 include:

Model	Manufacturers	lot number	encapsulation	illustrate
DP83848TSQ/NOPB	NSC	10+11+		Hong Kong spot, imported original
DP83848YB/NOPB		10+11+		Hong Kong spot, imported original
DP83848JSQ/NOPB	TI	10+11+	LLP40	Hong Kong spot, imported original
DP83848IVV/NOPB		10+11+		Hong Kong spot, imported original
DP83848MSQ/NOPB		10+11+		Hong Kong spot, imported original
DP83848CVV/NOPB		10+11+		Hong Kong spot, imported original
DP83848JSQ	NSC	10+11+	LLP	PHYTER Mini LS Commercial-Grade Temperature Single-Port 10/100 Mb/s Ethernet Transceiver
DP83848MSQ	NSC	10+	LLP	Temperature 10/100 Ethernet transceiver
UC3848DW	UC	03+	SOP	Pulse width modulation circuit
DP83848	NSC	05+	LQFP48	Brand new original
DP83848TSQ	NSC	11+	LLP-40	DP83848T PHYTER Mini-Industrial Temperature Single 10/100 Ethernet Transceiver
DP83848IVVX	NSC	09+	SPQ 1K PCS	PHYTER Industrial Temperature Single-Port 10/100 Mb/s Ethernet Physical Layer Transceiver
DP83848IVV	NSC	11+	QFP48	PHYTER Industrial Temperature Single-Port 10/100 Mb/s Ethernet Physical Layer Transceiver
DP83848CVV	NSC	09+	LQFP	PHYTER commercial temperature single-port 10/100 Mb/s Ethernet physical layer transceiver
UC3848	TI	09+	16PDIP, 16SOIC	Average current mode PWM controller

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Model	Manufacturers	lot number	encapsulation	illustrate
UC3847	TI	09+	16PDIP, 16SOIC	Current-mode PWM controller
UC3846	TI	10+	16PDIP, 16SOIC, 20PLCC	Current-mode PWM controller
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

UC3848

parameter

The ICs associated with UC3848 include:

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