UCC2889

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：09+
封装：8PDIP, 8SOIC
库存状态：有库存
库存量：8500
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

	UCC2889
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)	-40 to 85

ICs related to UCC2889 include:

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UCC2889

parameter

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