Datasheet > UC3825

UC3825

更新时间： 2024-01-07 03:09:17

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
2页	138K
描述
high speed pwm controller

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中文翻译

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技术参数
数据手册

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UC3825 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QLCC
包装说明：	GREEN, PLASTIC, LCC-20	针数：	20
Reach Compliance Code：	unknown	风险等级：	5.13
Is Samacsys：	N	其他特性：	CAN ALSO BE CONFIGURED IN CURRENT MODE
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	30 V
最小输入电压：	8.8 V	标称输入电压：	15 V
JESD-30 代码：	S-PQCC-J20	JESD-609代码：	e3
长度：	8.965 mm	湿度敏感等级：	2
功能数量：	1	端子数量：	20
最高工作温度：	70 °C	最低工作温度：
最大输出电流：	2 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	QCCJ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	260
座面最大高度：	4.57 mm	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	1000 kHz
技术：	BICMOS	温度等级：	COMMERCIAL
端子面层：	TIN	端子形式：	J BEND
端子节距：	1.27 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	8.965 mm
Base Number Matches：	1

UC3825 数据手册

UC1823A,B/1825A,B

UC2823A,B/2825A,B

UC3823A,B/3825A,B

High Speed PWM Controller

FEATURES

DESCRIPTION

The UC3823A & B and the UC3825A & B family of PWM control ICs are im-

proved versions of the standard UC3823 & UC3825 family. Performance en-

hancements have been made to several of the circuit blocks. Error amplifier gain

bandwidth product is 12MHz while input offset voltage is 2mV. Current limit

threshold is guaranteed to a tolerance of 5%. Oscillator discharge current is spec-

ified at 10mA for accurate dead time control. Frequency accuracy is improved

to 6%. Startup supply current, typically 100µA, is ideal for off-line applications.

The output drivers are redesigned to actively sink current during UVLO at no

expense to the startup current specification. In addition each output is capable

of 2A peak currents during transitions.

•

Improved versions of the

UC3823/UC3825 PWMs

Compatible with Voltage or

Current-Mode Topologies

Practical Operation at Switching

Frequencies to 1MHz

•

50ns Propagation Delay to Output

High Current Dual Totem Pole

Outputs (2A Peak)

Functional improvements have also been implemented in this family. The

UC3825 shutdown comparator is now a high-speed overcurrent comparator with

a threshold of 1.2V. The overcurrent comparator sets a latch that ensures full

discharge of the soft start capacitor before allowing a restart. While the fault latch

is set, the outputs are in the low state. In the event of continuous faults, the soft

start capacitor is fully charged before discharge to insure that the fault frequency

does not exceed the designed soft start period. The UC3825 Clock pin has be-

come CLK/LEB. This pin combines the functions of clock output and leading

edge blanking adjustment and has been buffered for easier interfacing.

continued

•

Trimmed Oscillator Discharge

Current

•

Low 100µA Startup Current

Pulse-by-Pulse Current Limiting

Comparator

•

Latched Overcurrent Comparator

With Full Cycle Restart

BLOCK DIAGRAM

UDG-95101

* Note: 1823A,B Version Toggles Q and Q are always low

9/95

中文翻译

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与UC3825相关器件

型号	品牌	获取价格	描述	数据表
UC3825A	TI	获取价格	High Speed PWM Controller
UC3825AD	TI	获取价格	High Speed PWM Controller
UC3825ADTR	TI	获取价格	High Speed PWM Controller
UC3825ADW	TI	获取价格	High Speed PWM Controller
UC3825ADWG4	TI	获取价格	HIGH-SPEED PWM CONTROLLER
UC3825ADWR	TI	获取价格	IC SWITCHING CONTROLLER, Switching Regulator or Controller
UC3825ADWTR	TI	获取价格	High Speed PWM Controller
UC3825ADWTR	ROCHESTER	获取价格	2.2 A SWITCHING CONTROLLER, 1150 kHz SWITCHING FREQ-MAX, PDSO16, GREEN, SOIC-16
UC3825ADWTRG4	TI	获取价格	High Speed PWM Controller
UC3825AJ	ETC	获取价格	Analog IC

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