Datasheet > UC384XBDR2

UC384XBDR2

更新时间： 2024-01-09 10:43:04

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
20页	295K
描述
HIGH PERFORMANCE CURRENT MODE CONTROLLERS

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UC384XBDR2 数据手册

UC3842B, UC3843B,

UC2842B, UC2843B,

NCV3843BV

High Performance

Current Mode Controllers

http://onsemi.com

The UC3842B, UC3843B series are high performance fixed

frequency current mode controllers. They are specifically designed for

Off–Line and dc–to–dc converter applications offering the designer a

cost–effective solution with minimal external components. These

integrated circuits feature 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.

PDIP–8

N SUFFIX

CASE 626

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.

SO–8

D1 SUFFIX

CASE 751

These devices are available in an 8–pin dual–in–line and surface

mount (SO–8) 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.

The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off),

ideally suited for off–line converters. The UCX843B is tailored for

lower voltage applications having UVLO thresholds of 8.5 V (on) and

7.6 V (off).

SO–14

D SUFFIX

CASE 751A

PIN CONNECTIONS

• Trimmed Oscillator for Precise Frequency Control

• Oscillator Frequency Guaranteed at 250 kHz

• Current Mode Operation to 500 kHz

Compensation

Voltage Feedback

Current Sense

ref

Output

Gnd

R /C

• Automatic Feed Forward Compensation

• Latching PWM for Cycle–By–Cycle Current Limiting

• Internally Trimmed Reference with Undervoltage Lockout

• High Current Totem Pole Output

(Top View)

Compensation

ref

Voltage Feedback

• Undervoltage Lockout with Hysteresis

• Low Startup and Operating Current

Current Sense

Output

7(12)

Gnd

R /C

Power Ground

ref

5.0V

Reference

Undervoltage

Lockout

(Top View)

8(14)

ref

Undervoltage

Lockout

ORDERING INFORMATION

See detailed ordering and shipping information in the package

7(11)

dimensions section on page 16 of this data sheet.

R /C

Output

Oscillator

6(10)

4(7)

Latching

PWM

Power

Ground

5(8)

DEVICE MARKING INFORMATION

See general marking information in the device marking

section on page 17 of this data sheet.

Voltage

Feedback

Input

2(3)

Error

Amplifier

Current

Sense

Input

Output

Compensation

3(5)

1(1)

Gnd 5(9)

Pin numbers in parenthesis are for the D suffix SO-14 package.

Figure 1. Simplified Block Diagram

Semiconductor Components Industries, LLC, 2001

Publication Order Number:

December, 2001 – Rev. 3

UC3842B/D

12 3 4 5 6 7...20

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与UC384XBDR2相关器件

型号	品牌	获取价格	描述	数据表
UC384XBDR2G	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBN	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBN	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBNG	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBVD	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBVD	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBVD1	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBVD1	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBVD1G	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC384XBVD1R2	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS

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