UC1856

更新时间： 2024-11-22 22:41:51

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
9页	388K
描述
Improved Current Mode PWM Controller

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UC1856 数据手册

UC1856

UC2856

UC3856

Improved Current Mode PWM Controller

FEATURES

DESCRIPTION

•

Pin-for-Pin Compatible With the UC3846

The UC3856 is a high performance version of the popular UC3846

series of current mode controllers, and is intended for both design

upgrades and new applications where speed and accuracy are impor-

tant. All input to output delays have been minimized, and the current

sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A

peak output stages have been added to allow rapid switching of

power FETs.

•

65ns Typical Delay From Shutdown to

Outputs, and 50ns Typical Delay From

Sync to Outputs

•

Improved Current Sense Amplifier With

Reduced Noise Sensitivity

Differential Current Sense with 3V

Common Mode Range

A low impedance TTL compatible sync output has been implemented

with a tri-state function when used as a sync input.

Trimmed Oscillator Discharge Current

for Accurate Deadband Control

Internal chip grounding has been improved to minimize internal

“noise” caused when driving large capacitive loads. This, in conjunc-

tion with the improved differential current sense amplifier results in

enhanced noise immunity.

•

Accurate 1V Shutdown Threshold

High Current Dual Totem Pole Outputs

(1.5A peak)

Other features include a trimmed oscillator current (8%) for accurate

frequency and dead time control; a 1V, 5% shutdown threshold; and

4kV minimum ESD protection on all pins.

•

TTL Compatible Oscillator SYNC Pin

Thresholds

4kV ESD Protection

BLOCK DIAGRAM

UDG-96176

9/96

12 3 4 5 6 7...9

中文翻译

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UC1856 替代型号

型号	品牌	替代类型	描述	数据表
UC2856	TI	功能相似	Improved Current Mode PWM Controller
UC3856	TI	功能相似	Improved Current Mode PWM Controller

与UC1856相关器件

型号	品牌	获取价格	描述	数据表
UC1856_12	TI	获取价格	Improved Current Mode PWM Controller
UC1856J	TI	获取价格	Improved Current Mode PWM Controller
UC1856J883B	TI	获取价格	Improved Current Mode PWM Controller
UC1856L	TI	获取价格	Improved Current Mode PWM Controller
UC1856L20	TI	获取价格	Improved Current Mode PWM Controller
UC1856L20883B	TI	获取价格	Improved Current Mode PWM Controller
UC1856L883B	TI	获取价格	Improved Current Mode PWM Controller
UC1856-SP	TI	获取价格	PWM 中的航天级、40V 输入、1.5A 双路输出 1MHz MHz 控制器
UC185DW	ETC	获取价格	Analog IC
UC185DWTR	ETC	获取价格	Analog IC