UC2825

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：4500
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 cent

parameter

		UC2825
topology		Boost, flyback, forward, full-bridge, half-bridge, push-to-pull
Control method		Current mode
Duty Cycle (Max) (%)		50
Frequency (max) (kHz)		1000
On/off of undervoltage lockout threshold (5)		9.2/8.4
Pin/Pack		16PDIP，16SOIC，20PLCC
(#) Regulated output		2
Operating Temperature Range (°C)		-40 to 85

The ICs associated with the UC2825 include:

Model	Manufacturers	lot number	encapsulation	illustrate
UC2825DWR	Texas Instruments	16+	SOIC	IC REG CTRLR MULT TOP 16SOIC
UC2825N	TI	12+	DIP	Power management chips
UC2825BDW	TI	10+11+		Hong Kong spot, imported original
LM2825HN-ADJ/NOPB		10+11+		Hong Kong spot, imported original
LM2825N-3.3/NOPB		10+11+		Hong Kong spot, imported original
LM2825N-5.0/NOPB		10+11+		Hong Kong spot, imported original
LM2825N-5.0	NSC	10+	DIP-24	Integrated power supply 1A DC-DC converter
LM2825N-3.3	NSC	11+	ORIGINAL	Integrated power supply 1A DC-DC converter
2SK2825	Toshiba	05+	N／A	N／A
M28256-12BS6	ST	00+	DIP-28	New inventory
HSMS-2825-TR1	Agilent	04+	SOT-143	Brand new original
M28256-15KA6	ST	00+	PLCC	New inventory
HSMS-2825	Hp	N／A	N／A	N／A
TC528257J-70	N／A	01+	SOJ	New original stock available
UC2825ACDW	TI	01+	SOP-16	Brand new original
UC2825Q	UNITRODE	00+	PLCC-20P	Original in stock
UCC28250	TI	11+	20QFN, 20TSSOP	Advanced PWM controller with pre-bias operation
UC2825B	TI	09+	16PDIP, 16SOIC	High-speed PWM controller
UC2825A-Q1	TI	10+	16SOIC	Automotive-class high-speed PWM controllers
UC2825A	TI	09+	16PDIP, 16SOIC, 20PLCC	High-speed PWM controller

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