UC1842A-SP

更新时间： 2024-11-26 12:16:55

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
15页	650K
描述
QML CLASS V, CURRENT-MODE PWM CONTROLLERS

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UC1842A-SP 数据手册

UC1842A-SP, UC1843A-SP, UC1844A-SP, UC1845A-SP

www.ti.com ........................................................................................................................................................ SLUS872A–JANUARY 2009–REVISED MAY 2009

QML CLASS V, CURRENT-MODE PWM CONTROLLERS

FEATURES

JG PACKAGE

(TOP VIEW)

•

QML-V Qualified, SMD 5962-86704

(1) (2)

Rad-Tolerant: 30 kRad (Si) TID

Comp

V_FB

V_REF

Optimized for Offline and DC-to-DC Converters

Low Start-Up Current (<0.5 mA)

Trimmed Oscillator Discharge Current

Automatic Feed Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load Response Characteristics

Undervoltage Lockout With Hysteresis

Double-Pulse Suppression

V_CC

I_SENSE

R_T/C_T

Output

Gnd

FK PACKAGE

(TOP VIEW)

1 20 19

High-Current Totem-Pole Output

Internally Trimmed Bandgap Reference

500-kHz Operation

N/C

V_CC

V_C

V_FB

N/C

I_SENSE

!Ƶ?!

Output

Low R_OError Amplifier

N/C

9 10

11 12

(1) Radiation tolerance is a typical value based upon initial device

qualification with dose rate = 10 mrad/sec. Radiation Lot

Acceptance Testing is available - contact factory for details.

(2) 5962-8670409VPA currently offered. Contact factory for

additional devices.

DESCRIPTION

The UC1842A/3A/4A/5A family of control IC's is a pin for pin compatible improved version of the UC1842/3/4/5

family.Providing the necessary features to control current-mode switched-mode power supplies, this device has

the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is

trimmed to 8.3 mA. During undervoltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for

V_CCover 5 V.

The difference between members of this family are shown in Table 1.

Table 1. UC184xA Family

MAXIMUM DUTY

PART NO.

UVLO ON

UVLO OFF

CYCLE

< 100%

< 50%

UC1842A

UC1843A

UC1844A

UC1845A

16.0 V

8.5 V

10.0 V

7.9 V

16.0 V

8.5 V

10.0 V

7.9 V

< 50%

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...15

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与UC1842A-SP相关器件

型号	品牌	获取价格	描述	数据表
UC1842B UC1843B	UTC	获取价格	high performance current mode pwm controllers
UC1842D	ETC	获取价格	SMPS Controller
UC1842D8	ETC	获取价格	SMPS Controller
UC1842D8TR	ETC	获取价格	SMPS Controller
UC1842DTR	ETC	获取价格	SMPS Controller
UC1842J	TI	获取价格	Current Mode PWM Controller
UC1842J883B	TI	获取价格	Current Mode PWM Controller
UC1842JQMLV	TI	获取价格	Current Mode PWM Controller
UC1842L883B	TI	获取价格	Current Mode PWM Controller
UC1842N	ETC	获取价格	SMPS Controller

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