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UC1843-HIREL

更新时间： 2024-11-23 12:22:35

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
10页	214K
描述
CURRENT MODE PWM CONTROLLER (KNOWN GOOD DIE)

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UC1843-HIREL 数据手册

UC1843-HiRel

www.ti.com .................................................................................................................................................. SLUS896A–AUGUST 2009–REVISED AUGUST 2009

CURRENT MODE PWM CONTROLLER (KNOWN GOOD DIE)

FEATURES

DESCRIPTION

•

–55°C to 125°C Known Good Die

Controlled Baseline

The UC1843 family of control devices provides the

necessary features to implement off-line or dc-to-dc

fixed frequency current mode control schemes with a

minimal external parts count. Internally implemented

circuits include under-voltage lockout featuring start

up current less than 1 mA, a precision reference

trimmed for accuracy at the error amp input, logic to

insure latched operation, a PWM comparator which

also provides current limit control, and a totem pole

output stage designed to source or sink high peak

current. The output stage, suitable for driving

N-Channel MOSFETs, is low in the off state. The

Optimized For Off-line and DC-to-DC

Converters

•

Low Start-Up Current (<1 mA)

Automatic Feed Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load Response Characteristics

Under-Voltage Lockout With Hysteresis

Double Pulse Suppression

High Current Totem Pole Output

Internally Trimmed Bandgap Reference

500-kHz Operation

under-voltage lockout threshold is 8.4

maximum duty cycle range is around 100%.

and

Low R_OError Amp

xxx

BLOCK DIAGRAM

7 12

UVLO

34 V

5 V

S/R

8 14

REF

GROUND

REF

5 V

50 mA

2.50 V

Internal

BIAS

VREF

Good

Logic

OSC

R /C

Error

Amp

OUTPUT

PWM

LATCH

POWER

GROUND

1 V

CURRENT

SENSE

COMPARATOR

COMP

CURRENT

SENSE

A/B

ORDERING INFORMATION⁽¹⁾

T_A

–55°C to 125°C

PACKAGE⁽²⁾

ORDERABLE PART NUMBER

TOP-SIDE MARKING

KGD

UC1843KGD1

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

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...10

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UC1843J	TI	获取价格	Current Mode PWM Controller
UC1843J883B	TI	获取价格	Current Mode PWM Controller
UC1843JQMLV	TI	获取价格	Current Mode PWM Controller
UC1843L	TI	获取价格	Current Mode PWM Controller
UC1843L883B	TI	获取价格	Current Mode PWM Controller
UC1843LQMLV	TI	获取价格	Current Mode PWM Controller
UC1843MKGD1	TI	获取价格	CURRENT MODE PWM CONTROLLER (KNOWN GOOD DIE)
UC1843N	ETC	获取价格	SMPS Controller
UC1843Q	ETC	获取价格	SMPS Controller
UC1843-SP	TI	获取价格	耐辐射 QMLV、30V 输入、1A 单路输出 500kHz PWM 控制器、100% 占

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