UCC3882N-1

更新时间： 2024-11-23 08:25:51

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
16页	272K
描述
AVERAGE CURRENT MODE SYNCHRONOUS CONTROLLER WITH 5-BIT DAC

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UCC3882N-1 数据手册

UCC3882/-1

www.ti.com

SLUS294A–MARCH 1999–REVISED OCTOBER 2005

AVERAGE CURRENT MODE SYNCHRONOUS

CONTROLLER WITH 5-BIT DAC

FEATURES

DESCRIPTION

•

Combined DAC/Voltage Monitor and PWM

The UCC3882 combines high precision reference and

voltage monitoring circuitry with average current

mode PWM synchronous rectification controller

circuitry to power high-end microprocessors with a

minimum of external components. The UCC3882

converts 5 V or 12 V to an adjustable output ranging

from 1.8VDC to 2.05VDC in 50 mV steps and

2.1VDC to 3.5VDC in 100 mV steps with 1% DC

system accuracy.

With Synchronous Rectification Functions

5-Bit Digital-to-Analog (DAC) Converter

1% DAC/Reference Combined Accuracy

•

Compatible with 5 V and 12 V Systems and 12

V-Only Systems

•

Low Offset Current Sense Amplifier

Programmable Oscillator Frequency Practical

to 700 kHz

•

Foldback Current Limiting

Overvoltage and Undervoltage Fault Windows

2-Ω Totem Pole Outputs with Programmable

Dead Times to Eliminate Cross-Conduction

•

Chip Disable Function

BLOCK DIAGRAM

CAM

CAO

OVP

OVP (+ 17.5%)

OV (+ 9%)

PWRGD

VSNS

Current

Amplifier

3 V

UV (−9%)

Voltage

Amplifier

VDRVHI

GATEHI

PGND

VFB 15

Turn

Delay

COMP 16

Anti Cross

Condition

Foldback

Current

Limit

ISOUT

VDRVLO

GATELO

Current Sense

Amplifier

1.37 V

Turn

IS−

IS+

Delay

X16

VSNS

Output Offset

5 V REF

4.3 V/4.2 V

VIN

D/C Converter

2 V − 3.5 V, 100 mV

UVLO

OSC

VIN

D2 24

D3 23

D4 22

1.3 V − 2.05 V, 50 mV

10.5 V/10 V

5 V

REF

VREF

GND

CT RT

COMMAND

UDG−97047−1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...16

中文翻译

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与UCC3882N-1相关器件

型号	品牌	获取价格	描述	数据表
UCC3882PW	TI	获取价格	AVERAGE CURRENT MODE SYNCHRONOUS CONTROLLER WITH 5-BIT DAC
UCC3882PW-1	TI	获取价格	AVERAGE CURRENT MODE SYNCHRONOUS CONTROLLER WITH 5-BIT DAC
UCC3882PWTR	TI	获取价格	22A SWITCHING CONTROLLER, 700kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28
UCC3882PWTR-1	TI	获取价格	AVERAGE CURRENT MODE SYNCHRONOUS CONTROLLER WITH 5-BIT DAC
UCC3882PWTR-1G4	TI	获取价格	AVERAGE CURRENT MODE SYNCHRONOUS CONTROLLER WITH 5-BIT DAC
UCC3883DTR	TI	获取价格	0.5A SWITCHING CONTROLLER, 400kHz SWITCHING FREQ-MAX, PDSO16
UCC3883N	ETC	获取价格	Current-Mode SMPS Controller
UCC3884	TI	获取价格	Frequency Foldback Current Mode PWM Controller
UCC3884D	TI	获取价格	Frequency Foldback Current Mode PWM Controller
UCC3884DTRG4	TI	获取价格	1A SWITCHING CONTROLLER, 440kHz SWITCHING FREQ-MAX, PDSO16, GREEN, SOIC-16

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