UCC3889

所属类别：ACDC-和-DCDC-电源
产品名称：脱机电源控制器
厂商：TI
生产批号：10+
封装：8PDIP, 8SOIC
库存状态：有库存
库存量：5000
最低订购量：1
详细资料：

Product Introduction

UCC1889 the optimization of the controller for offline, low power, low voltage, regulated bias power supply. The unique circuit topology allows the device to be seen as two cascading flyback converters, each in a continuous operating mode, driven from a single external power switch. The significant advantage of this method is the ability to achieve a voltage conversion ratio of 400 V and a transformer-free internal loss as low as 12 V.

The control algorithm uses UCC1889 force the switching time to be an inversely proportional input voltage and the shutdown time switch to be an inversely proportional output voltage. This action is automatically fed back to the internal control loop and reference.

characteristic

Transformer offline application
Ideal for bias power on the primary side
Efficient BiCMOS design
Wide input range
Fixed or adjustable output voltage is low
Use low-cost SMD inductors
Short-circuit protection
Optional isolation capabilities

parameter

		UCC3889
topology		Reactionary style
Control method		Voltage mode
Duty Cycle (Max) (%)		55
Frequency (max) (kHz)		250
On/off of undervoltage lockout threshold (5)		8.4/6.3
Pin/Pack		8PDIP，8SOIC
(#) Regulated output		One
Operating Temperature Range (°C)		0 to 70

UCC3889-related ICs include:

Model	Manufacturers	lot number	encapsulation	illustrate
UCC3889D	UNITRODE	00+	SOP-8P	New original stock in stock
74FCT388915T133PY8	IDT	06+	SOP	Original
IDT74FCT-388915T100PY	IDT	04+	SSOP28	Original inventory
UCC3889	TI	10+	8PDIP, 8SOIC	Offline power controller

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TI brand product recommendation

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