UC3842ADG4

更新时间： 2024-01-12 06:05:16

品牌	Logo	应用领域
德州仪器 - TI		控制器开关光电二极管信号电路模拟IC
页数	文件大小	规格书
11页	659K
描述
具有 16V/10V UVLO 和 100% 占空比、温度范围为 0°C 至 70°C 的 30V、1A、500KHz 电流模式 PWM 控制器 \| D \| 14 \| 0 to 70

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技术参数
数据手册

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UC3842ADG4 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.83	Is Samacsys：	N
控制模式：	CURRENT-MODE	JESD-30 代码：	R-XDFP-F14
端子数量：	14	最高工作温度：	70 °C
最低工作温度：		最大输出电流：	0.2 A
封装主体材料：	CERAMIC	封装代码：	DFP
封装等效代码：	FL14,.25	封装形状：	RECTANGULAR
封装形式：	FLATPACK	认证状态：	Not Qualified
子类别：	Switching Regulator or Controllers	表面贴装：	YES
最大切换频率：	500 kHz	技术：	BIPOLAR
温度等级：	COMMERCIAL	端子形式：	FLAT
端子节距：	1.27 mm	端子位置：	DUAL
Base Number Matches：	1

UC3842ADG4 数据手册

application

INFO

UC1842A/3A/4A/5A

UC2842A/3A/4A/5A

UC3842A/3A/4A/5A

available

Current Mode PWM Controller

FEATURES

DESCRIPTION

•

Optimized for Off-line and DC to DC

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compati-

ble improved version of the UC3842/3/4/5 family. Providing the nec-

essary features to control current mode switched mode power

supplies, this family has the following improved features. Start up cur-

rent is guaranteed to be less than 0.5mA. Oscillator discharge is

trimmed to 8.3mA. During under voltage lockout, the output stage

can sink at least 10mA at less than 1.2V for VCC over 5V.

Converters

•

Low Start Up Current (<0.5mA)

Trimmed Oscillator Discharge Current

Automatic Feed Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load Response Characteristics

Under-Voltage Lockout With Hysteresis

Double Pulse Suppression

The difference between members of this family are shown in the table

below.

Maximum Duty

Part #

UVLO On

UVLO Off

Cycle

<100%

<50%

High Current Totem Pole Output

Internally Trimmed Bandgap Reference

500kHz Operation

UC1842A

UC1843A

UC1844A

UC1845A

16.0V

8.5V

10.0V

7.9V

16.0V

8.5V

10.0V

7.9V

<50%

Low RO Error Amp

BLOCK DIAGRAM

A/B

Note 1:

A = DIL-8 Pin Number. B = SO-14 Pin Number.

Note 2: Toggle flip flop used only in 1844A and 1845A.

SLUS224A - SEPTEMBER 1994 - REVISED APRIL 2002

12 3 4 5 6 7...11

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