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SG2524DRG4 PDF预览

SG2524DRG4

更新时间： 2024-02-18 22:24:57
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脉冲光电二极管PC
页数 文件大小 规格书
24页 821K
描述
REGULATING PULSE-WIDTH MODULATORS

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SG2524DRG4 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：SOIC
包装说明：SOP, SOP16,.25针数：16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：5.13Samacsys Confidence：3
Samacsys Status：Released2D Presentation：https://componentsearchengine.com/2D/0T/1061678.1.1.png
Schematic Symbol：https://componentsearchengine.com/symbol.php?partID=1061678PCB Footprint：https://componentsearchengine.com/footprint.php?partID=1061678
3D View：https://componentsearchengine.com/viewer/3D.php?partID=1061678Samacsys PartID：1061678
Samacsys Image：https://componentsearchengine.com/Images/9/SG2524DRG4.jpgSamacsys Thumbnail Image：https://componentsearchengine.com/Thumbnails/1/SG2524DRG4.jpg
Samacsys Pin Count：16Samacsys Part Category：Integrated Circuit
Samacsys Package Category：Small Outline PackagesSamacsys Footprint Name：soic-D
Samacsys Released Date：2019-10-11 04:00:57Is Samacsys：N
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：40 V
最小输入电压：8 V标称输入电压：20 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e4
长度：9.9 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：85 °C最低工作温度：-25 °C
最大输出电流：0.1 A最大输出电压：5.4 V
最小输出电压：4.6 V标称输出电压：5 V
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.75 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：450 kHz
技术：BIPOLAR温度等级：OTHER
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)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：3.9 mm
Base Number Matches：1

SG2524DRG4 数据手册

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SLVS077D – APRIL 1977 – REVISED FEBRUARY 2003  
†
PRINCIPLES OF OPERATION  
The SG2524 is a fixed-frequency pulse-width-modulation (PWM) voltage-regulator control circuit. The regulator  
operates at a fixed frequency that is programmed by one timing resistor, R , and one timing capacitor, C . R  
T
T
T
establishes a constant charging current for C . This results in a linear voltage ramp at C , which is fed to the  
T
T
comparator, providing linear control of the output pulse duration (width) by the error amplifier. The SG2524 contains  
an onboard 5-V regulator that serves as a reference, as well as supplying the SG2524 internal regulator control  
circuitry. The internal reference voltage is divided externally by a resistor ladder network to provide a reference within  
the common-mode range of the error amplifier as shown in Figure 6, or an external reference can be used. The output  
is sensed by a second resistor divider network and the error signal is amplified. This voltage is then compared to the  
linear voltage ramp at C . The resulting modulated pulse out of the high-gain comparator then is steered to the  
T
appropriate output pass transistor (Q1 or Q2) by the pulse-steering flip-flop, which is synchronously toggled by the  
oscillator output. The oscillator output pulse also serves as a blanking pulse to ensure both outputs are never on  
simultaneously during the transition times. The duration of the blanking pulse is controlled by the value of C . The  
T
outputs may be applied in a push-pull configuration in which their frequency is one-half that of the base oscillator, or  
paralleled for single-ended applications in which the frequency is equal to that of the oscillator. The output of the error  
amplifier shares a common input to the comparator with the current-limiting and shut-down circuitry and can be  
overridden by signals from either of these inputs. This common point is pinned out externally via the COMP pin, which  
can be employed to either control the gain of the error amplifier or to compensate it. In addition, the COMP pin can  
be used to provide additional control to the regulator.  
†
APPLICATION INFORMATION  
oscillator  
The oscillator controls the frequency of the SG2524 and is programmed by R and C as shown in Figure 4.  
T
T
1.30  
f [  
R C  
T
T
where: R is in kΩ  
T
C is in µF  
T
f is in kHz  
Practical values of C fall between 0.001 µF and 0.1 µF. Practical values of R fall between 1.8 kΩ and 100 kΩ.  
T
T
This results in a frequency range typically from 130 Hz to 722 kHz.  
blanking  
The output pulse of the oscillator is used as a blanking pulse at the output. This pulse duration is controlled by  
the value of C as shown in Figure 5. If small values of C are required, the oscillator output pulse duration can  
T
T
be maintained by applying a shunt capacitance from OSC OUT to ground.  
synchronous operation  
When an external clock is desired, a clock pulse of approximately 3 V can be applied directly to the oscillator  
output terminal. The impedance to ground at this point is approximately 2 kΩ. In this configuration, R C must  
T T  
be selected for a clock period slightly greater than that of the external clock.  
†
Throughout these discussions, references to the SG2524 apply also to the SG3524.  
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1...45678910...24

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