UC3825

所属类别：ACDC-和-DCDC-电源
产品名称：高速 PWM 控制器
厂商：TI
生产批号：09+
封装：16PDIP, 16SOIC, 20PLCC
库存状态：有库存
库存量：4000
最低订购量：1
详细资料：

Product Introduction

The PWM control IC UC1825 series is best suited for high frequencies for switching power supply applications. Special attention is given to minimize the propagation delay of the amplifier logic circuit by comparing and maximizing the bandwidth and slew rate of errors. The controller is designed for voltage mode systems that feed forward with either current mode or input voltage.

The protection circuitry includes a 1V threshold current-limited comparator compatible with the TTL shut-off port and soft-start pins, which will double the maximum duty cycle clamping. The logic is to completely lock the free operation of providing jitter and prohibit multiple pulses from being output. The 800mV hysteresis undervoltage lockout section ensures low start-up current.

characteristic

Suitable for voltage or current mode topologies
The actual operating switching frequency is 1MHz
50ns propagation delay to output
High current dual totem (1.5A peak) pole output
Wideband error amplifier
Fully locked logic dual-pulse suppression
The pulse is limited by the pulse current
Soft start/max. Duty cycle control
Undervoltage lockout and hysteresis
Low starting current (1.1 milliampere)

parameter

			UC3825
topology			Boost, buck, reverse, forward, full-bridge, half-bridge, push-pull
Control method			Current mode, voltage mode
Duty Cycle (Max) (%)			50
Frequency (max) (kHz)			1000
On/off of undervoltage lockout threshold (5)			9.2/8.4
Pin/Pack			16PDIP，20PLCC，16SOIC
(#) Regulated output			2
Operating Temperature Range (°C)			0 to 70

The ICs associated with the UC3825 include:

Model	Manufacturers	lot number	encapsulation	illustrate
382575-2	TYCO	10+	N/A	Brand new original import, Hong Kong spot
TPS3825-33DBVR	TI	10+	N/A	Brand new original import, Hong Kong spot
UC3825BN/DW	UC	02+	DIP	Brand new original
M38257M8-053FP	Mitsubishi	00+	QFP-80	Programmable DMA controller
UC3825BN	UC	93+	DIP-16	Brand new original
UC3825ADW	UNITRODE	99+	SMD	New original stock available
SG3825	LINFINITY	00+	DIP/SMD	Brand new original
UC3825Q	UC	06+	PLCC-20
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
TPS3825-50-Q1	TI	07+	SOP	Automotive processor monitoring circuit
TPS3825-50	TI	10+	SOT23-5	Processor monitoring circuit
TPS3825-33-Q1	TI	07+	SOP	Automotive processor monitoring circuit
TPS3825-33	TI	10+	SOT-153	Processor monitoring circuit
UC3825DW	TI	0710+	HTSSOP16

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UC3825

parameter

The ICs associated with the UC3825 include:

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