Datasheet > UCC28502DW

UCC28502DW

更新时间： 2024-09-20 04:48:11

品牌	Logo	应用领域
德州仪器 - TI		功率因数校正信息通信管理控制器
页数	文件大小	规格书
31页	561K
描述
BICMOS PFC/PWM COMBINATION CONTROLLER

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技术参数
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UCC28502DW 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	SOP, SOP20,.4
针数：	20	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
Factory Lead Time：	1 week	风险等级：	5.64
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-PDSO-G20
长度：	12.8 mm	功能数量：	1
端子数量：	20	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	1.2 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP20,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	2.65 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	BOOST	最大切换频率：	120 kHz
技术：	BICMOS	温度等级：	INDUSTRIAL
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	7.5 mm	Base Number Matches：	1

UCC28502DW 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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与UCC28502DW相关器件

型号	品牌	获取价格	描述	数据表
UCC28502DWTR	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC28502DWTRG4	TI	获取价格	1.2A POWER FACTOR CONTROLLER WITH POST REGULATOR, 120kHz SWITCHING FREQ-MAX, PDSO20, GREEN
UCC28502N	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC28502NG4	TI	获取价格	IC 1.2 A POWER FACTOR CONTROLLER WITH POST REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDIP20,
UCC28503	TI	获取价格	BiCMOS PFC/PWM Combination Controller
UCC28503DW	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC28503DWG4	TI	获取价格	BiCMOS PFC/PWM COMBINATION CONTROLLER
UCC28503DWTR	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER
UCC28503DWTRG4	TI	获取价格	1.2A POWER FACTOR CONTROLLER WITH POST REGULATOR, 120kHz SWITCHING FREQ-MAX, PDSO20, GREEN
UCC28503N	TI	获取价格	BICMOS PFC/PWM COMBINATION CONTROLLER

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