UCD8620

更新时间： 2024-02-21 10:16:03

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
32页	2407K
描述
DIGITALLY MANAGED PUSH-PULL ANALOG PWM CONTROLLERS

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UCD8620 技术参数

生命周期：	Obsolete	零件包装代码：	QFN
包装说明：	PLASTIC, QFN-20	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
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：	15.5 V
最小输入电压：	4.5 V	标称输入电压：	12 V
JESD-30 代码：	S-PQCC-N20	长度：	5 mm
功能数量：	1	端子数量：	20
最高工作温度：	105 °C	最低工作温度：	-40 °C
最大输出电流：	4 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	HVQCCN	封装等效代码：	LCC20,.20SQ,25
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
认证状态：	Not Qualified	座面最大高度：	1 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	2000 kHz
温度等级：	INDUSTRIAL	端子形式：	NO LEAD
端子节距：	0.65 mm	端子位置：	QUAD
宽度：	5 mm	Base Number Matches：	1

UCD8620 数据手册

UCD8220, UCD8620

www.ti.com

SLUS652B–MARCH 2005–REVISED SEPTEMBER 2005

DIGITALLY MANAGED PUSH-PULL ANALOG PWM CONTROLLERS

FEATURES

•

10-ns Typical Rise and Fall Times with 2.2-nF

25-ns Input-to-Output Propagation Delay

•

For Digitally Managed Power Supplies Using

µCs or the TMS320 ™ DSP Family

25-ns Current Sense-to-Output Propagation

Delay

Voltage or Peak Current Mode Control with

Cycle-by-Cycle Current Limiting

•

Programmable Current Limit Threshold

Digital Output Current Limit Flag

4.5-V to 15.5-V Supply Voltage Range

Rated from -40°C to 105°C

Clock input from Digital Controller to set

Operating Frequency and Max Duty Cycle

•

Analog PWM Comparator

2-MHz Switching Frequency

110-V Input Startup Circuit and Thermal

Shutdown (UCD8620)

APPLICATIONS

•

Digitally Managed Switch Mode Power

Supplies

Push-Pull, Half-Bridge, or Full-Bridge

Converters

Battery Chargers

•

Internal Programmable Slope Compensation

3.3-V, 10-mA Linear Regulator

DSP/µC Compatible Inputs

Dual ±4-A TrueDrive™ High Current Drivers

DESCRIPTION

The UCD8220 and UCD8620 are members of the UCD8K family of analog pulse-width modulator devices to be

used in digitally managed power supplies using a microcontroller or the TMS320™ DSP family.

UCD8220 and UCD8620 are double-ended PWM controllers configured with push-pull drive logic. The UCD8620

has a 110-V high-voltage startup circuit which can directly start up the controller from a 48-V telecom input line.

Systems using UCD8K devices close the PWM feedback loop with traditional analog methods, but the UCD8K

controllers include circuitry to interpret a time-domain digital pulse train. The pulse train contains the operating

frequency and maximum duty cycle limit which are used to control the power supply operation. This eases

implementation of a converter with high level control features without the added complexity or possible PWM

resolution limitations of closing the control loop in the discrete time domain.

Figure 1. UCD8220 Typical Simplified Push-Pull Converter Application Schematic

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

TMS320, TrueDrive, PowerPAD are trademarks of Texas Instruments.

UNLESS OTHERWISE NOTED this document contains PRO-

DUCTION DATA information current as of publication date. Prod-

ucts conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily

include testing of all parameters.

12 3 4 5 6 7...32

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