Datasheet > 电源电路 > 开关式稳压器或控制器> UCC38502N

UCC38502N

更新时间： 2024-11-23 04:48:11

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关式稳压器或控制器电源电路开关式控制器功率因数校正光电二极管信息通信管理
页数	文件大小	规格书
31页	561K
描述
BICMOS PFC/PWM COMBINATION CONTROLLER

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中文翻译

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技术参数
数据手册
替代型号

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UCC38502N 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：	DIP
包装说明：	DIP, DIP20,.3	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	1 week
风险等级：	0.86	其他特性：	CAN ALSO BE PROGRAMMED FOR CURRENT MODE AND VOLTAGE MODE
模拟集成电路 - 其他类型：	POWER FACTOR CONTROLLER WITH POST REGULATOR	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	15 V
最小输入电压：	10.3 V	标称输入电压：	12 V
JESD-30 代码：	R-PDIP-T20	JESD-609代码：	e4
长度：	25.4 mm	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：	1.2 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装等效代码：	DIP20,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	5.08 mm
子类别：	Switching Regulator or Controllers	最大供电电流 (Isup)：	4 mA
最大供电电压 (Vsup)：	18 V	标称供电电压 (Vsup)：	12 V
表面贴装：	NO	切换器配置：	BOOST
最大切换频率：	120 kHz	技术：	BICMOS
温度等级：	COMMERCIAL	端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	7.62 mm	Base Number Matches：	1

UCC38502N 数据手册

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SLUS419C − AUGUST 1999 − REVISED NOVEMBER 2001

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used to keep input power constant with varying input

voltage. Generation of V is accomplished using I in

conjunction with an external single-pole filter. This not

only reduces external parts count, but also avoids the

use of high-voltage components, offering a lower-cost

solution. The multiplier then divides the line current by

FEATURES

Combines PFC and Downstream Converter

Controls

Controls Boost Preregulator to Near-Unity

Power Factor

the square of V

Accurate Power Limiting

Improved Feedforward Line Regulation

The UCC2850x PFC section incorporates a low

offset-voltage amplifier with 7.5-V reference,

highly-linear multiplier capable of a wide current range,

a high-bandwidth, low offset-current amplifier, with a

Peak Current-Mode Control in Second Stage

Programmable Oscillator

Leading-Edge/Trailing-Edge Modulation for

Reduced Output Ripple

novel

noise-attenuation

configuration,

PWM

comparator and latch, and a high-current output driver.

Additional PFC features include over-voltage

protection, zero-power detection to turn off the output

when VAOUT is below 0.33 V and peak current and

power limiting.

Low Start-up Supply Current

Synchronized Second Stage Start-Up, with

Programmable Soft-start

Programmable Second Stage Shutdown

The dc-to-dc section relies on an error signal generated

on the secondary-side and processes it by performing

peak current mode control. The dc-to-dc section also

features current limiting, a controlled soft-start, preset

operating range with selectable options, and 50%

maximum duty cycle.

DESCRIPTION

The UCC2850x family provides all of the control

functions necessary for an active power-factor-

corrected preregulator and a second-stage dc-to- dc

converter. The controller achieves near-unity power

factor by shaping the ac input line current waveform to

correspond to the ac input-line voltage using average

current-mode control. The dc-to-dc converter uses

peak current-mode control to perform the step-down

power conversion.

The UCC28500 and UCC28502 have a wide UVLO

threshold (16.5 V/10 V) for bootstrap bias supply

operation. The UCC28501 and UCC28503 are

designed with a narrow UVLO range (10.5 V/10 V) more

suitable for fixed bias operation. The UCC28500 and

UCC28501 have a narrow UVLO threshold for PWM

stage (to allow operation down to 75% of nominal bulk

voltage), while the UCC28502 and UCC38503 are

configured for a much wider operation range for the

PWM stage (down to 50% of bulk nominal voltage).

The PFC stage is leading-edge modulated while the

second stage is trailing-edge synchronized to allow for

minimum overlap between the boost and PWM

switches. This reduces ripple current in the bulk-output

capacitor.In order to operate with over three-to-one

Available in 20-pin N and DW packages.

range of input-line voltages, a line feedforward (V ) is

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www.ti.com

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中文翻译

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UCC38502N 替代型号

型号	品牌	替代类型	描述	数据表
UCC38502NG4	TI	功能相似	BiCMOS PFC/PWM COMBINATION CONTROLLER

与UCC38502N相关器件

型号	品牌	获取价格	描述	数据表
UCC38502NG4	TI	获取价格	BiCMOS PFC/PWM COMBINATION CONTROLLER
UCC38503	TI	获取价格	BiCMOS PFC/PWM Combination Controller
UCC38503DW	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC38503DWG4	TI	获取价格	BiCMOS PFC/PWM COMBINATION CONTROLLER
UCC38503DWTR	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC38503DWTRG4	TI	获取价格	BiCMOS PFC/PWM COMBINATION CONTROLLER
UCC38503N	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC38503NG4	TI	获取价格	BiCMOS PFC/PWM COMBINATION CONTROLLER
UCC38510	ETC	获取价格	Advanced PFC/PWM Combination Controllers
UCC38517	TI	获取价格	ADVANCED PFC/PWM COMBINA CONTROLLERS

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