Datasheet > UC3842A

UC3842A

更新时间： 2024-11-04 04:27:07

品牌	Logo	应用领域
戈采 - FCI		控制器
页数	文件大小	规格书
6页	263K
描述
High Performance Current Mode Controller

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC3842A 数据手册

UC3842A High Performance

Current Mode Controller

The UC3842A series of high performance

Also included are protective features

consisting of input and reference undervoltage lockouts

each with hysteresis, cycle–by–cycle current limiting,

programmable output deadtime, and a latch for single

pulse metering.

This device is available in an 8–pin dual–in–

line plastic package as well as the 14–pin plastic surface

mount (SO–14). The SO–14 package has separate

power and ground pins for the totem pole output

stage.

fixed frequency current mode controllers are

specifically designed for off–line and dc–to–dc

converter applications offering the designer a cost

effective solution with minimal external components.

This integrated circuit features a trimmed oscillator

for precise duty cycle control, a temperature

compensated reference, high gain error amplifier,

current sensing comparator, and a high current totem

pole output ideally suited for driving a power

MOSFET.

The UC3842A has UVLO thresholds of

16V(on) and 10V(off), ideally suited for off–line

converters.

Trimmed Oscillator Discharge Current for Precise Duty

Cycle Control

CDSUFFIX

PLASTIC PACKAGE

8 DIP

Current Mode Operation to 500 kHz

Automatic Feed Forward Compensation

Latching PWM for Cycle–By–Cycle Current Limiting

Internally Trimmed Reference with Undervoltage Lockout

High Current Totem Pole Output

D8SUFFIX

PLASTIC PACKAGE

8 SOP

Undervoltage Lockout with Hysteresis

Low Startup and Operating Current

CSSUFFIX

PLASTIC PACKAGE

SOP-14

SIMPLIFIEDBLOCKDIAGRAM

PINCONNECTIONS

Pin numbers adjacent to terminals are for the D suffix 8-DIP package.

Pin numbers in parenthesis are for the S suffix SOP–14 package.

NOTES: 1. Maximum Package power dissipation limits must be observed.

2. Adjust V_CCabove the Startup threshold before setting to 15 V.

3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible

T_low= 0°C, T_high= +70°C.

4. This parameter is measured at the latch trip point with V_FB= 0V.

∆V Output Compensation

∆V Current Sense Input

5. Comparator gain is defined as: A_V

4-12

12 3 4 5 6

中文翻译

下载PDF

与UC3842A相关器件

型号	品牌	获取价格	描述	数据表
UC3842A UC3843A	UTC	获取价格	PWM Controllers with Low Start-Up Current
UC3842A/D	MOTOROLA	获取价格	High Performance Current Mode Controller
UC3842A_05	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A_05	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3842A_07	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3842A_11	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A_12	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A_17	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A-BW	FCI	获取价格	Current Mode PWM Controller Low Start-Up and Operating Current
UC3842ACD	ETC	获取价格	Analog IC