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UC3525BDW

更新时间： 2024-02-18 01:29:31

品牌	Logo	应用领域
德州仪器 - TI		脉冲
页数	文件大小	规格书
14页	651K
描述
Regulating Pulse Width Modulators

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技术参数
数据手册

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UC3525BDW 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QLCC	包装说明：	QCCJ, LDCC20,.4SQ
针数：	20	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.68	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：	35 V	最小输入电压：	8 V
标称输入电压：	20 V	JESD-30 代码：	S-PQCC-J20
长度：	8.965 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：	0.5 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCJ
封装等效代码：	LDCC20,.4SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	4.57 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：	500 kHz
技术：	BIPOLAR	温度等级：	COMMERCIAL
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

UC3525BDW 数据手册

application

INFO

UC1525B UC1527B

UC2525B UC2527B

UC3525B UC3527B

available

Regulating Pulse Width Modulators

FEATURES

DESCRIPTION

• 8 to 35V Operation

The UC1525B/1527B series of pulse width modulator integrated circuits

are designed to offer improved performance and lowered external parts

count when used in designing all types of switching power supplies. The

on-chip +5.1V buried zener reference is trimmed to ±0.75% and the input

common-mode range of the error amplifier includes the reference voltage,

eliminating external resistors. A sync input to the oscillator allows multiple

units to be slaved or a single unit to be synchronized to an external system

clock. A single resistor between the CT and the discharge terminals provide

a wide range of dead time adjustment. These devices also feature built-in

soft-start circuitry with only an external timing capacitor required. A shut-

down terminal controls both the soft-start circuitry and the output stages,

providing instantaneous turn off through the PWM latch with pulsed shut-

down, as well as soft-start recycle with longer shutdown commands. These

functions are also controlled by an undervoltage lockout which keeps the

outputs off and the soft-start capacitor discharged for sub-normal input volt-

ages. This lockout circuitry includes approximately 500mV of hysteresis for

jitter-free operation. Another feature of these PWM circuits is a latch follow-

ing the comparator. Once a PWM pulse has been terminated for any rea-

son, the outputs will remain off for the duration of the period. The latch is

reset with each clock pulse. The output stages are totem-pole designs ca-

pable of sourcing or sinking in excess of 200mA. The UC1525B output

stage features NOR logic, giving a LOW output for an OFF state. The

UC1527B utilizes OR logic which results in a HIGH output level when OFF.

• 5.1V Buried Zener Reference

Trimmed to ±0.75%

• 100Hz to 500kHz Oscillator Range

• Separate Oscillator Sync Terminal

• Adjustable Deadtime Control

• Internal Soft-Start

• Pulse-by-Pulse Shutdown

• Input Undervoltage Lockout with

Hysteresis

• Latching PWM to Prevent Multiple

Pulses

• Dual Source/Sink Output Drivers

• Low Cross Conduction Output Stage

• Tighter Reference Specifications

BLOCK DIAGRAM

UDG-95055

SLUS376 JULY 1995

12 3 4 5 6 7...14

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与UC3525BDW相关器件

型号	品牌	描述	获取价格	数据表
UC3525BDWG4	TI	Regulating Pulse Width Modulators	获取价格
UC3525BDWTR	TI	Regulating Pulse Width Modulators	获取价格
UC3525BDWTRG4	TI	Regulating Pulse Width Modulators	获取价格
UC3525BJ	TI	Regulating Pulse Width Modulators	获取价格
UC3525BL	TI	Regulating Pulse Width Modulators	获取价格
UC3525BN	TI	Regulating Pulse Width Modulators	获取价格

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