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IMP38C42EMA PDF预览

IMP38C42EMA

更新时间： 2024-02-17 09:06:41
品牌 Logo 应用领域
A1PROS 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管信息通信管理
页数 文件大小 规格书
10页 161K
描述
BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode

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IMP38C42EMA 技术参数

生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP,针数：14
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.84
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：2.55 V
最小输入电压：2.45 V标称输入电压：2.5 V
JESD-30 代码：R-PDSO-G14长度：9 mm
功能数量：1端子数量：14
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE认证状态：Not Qualified
座面最大高度：2.65 mm表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：1000 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宽度：7.5 mm

IMP38C42EMA 数据手册

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IMP38C/HC/42/3/4/5  
powered through the out pin. Leakage current from the external For maximum application flexibility, start-up voltage ranges from  
power MOSFETs will not force the PWM output to rise and turn 14.5V to 8.4V. Start-up current has been reduced to 120µA maxi-  
the external MOSFETs on.  
mum and operating current has been reduced to 1.5mA maximum.  
Current-sense propagation delay time is 35ns typical, 65ns maxi- The IMP38C4x/IMP38HC4x are available in 8-pin and 14-pin DIP  
mum, representing an up to 75 percent reduction over other 38xx and SO packages as well as the 8-pin MicroSO package. The 14-  
implementations.  
pin devices provide separate pins for the controller power supply  
and the output driver supply. This configuration maximizes  
application flexibility and performance. The 14-pin package can  
also dissipate more power. Devices in the compact 8-pin packages  
Output stage drive is 0.5A for IMP38C4x devices. The high-drive  
IMP38HC4x family is rated at 1.0A peak current drive.  
Like conventional 384x controllers, the IMP38C4x and do not have separate output drive supply connections.  
IMP38HC4x controllers use the current-mode architecture for  
The IMP38C4x and IMP38HC4x families operate over the –40°C  
superior load regulation, pulse-by-pulse current limiting and out-  
to +85°C temperature range.  
put MOSFET protection. All versions operate up to 20 volts.  
Pin Configuration  
SO/MicroSO/DIP  
SO/DIP  
COMP  
NC  
1
2
3
4
5
6
7
14 V  
REF  
COMP  
FB  
1
2
3
4
8
7
6
5
V
V
REF  
DD  
IMP38C4x  
IMP38HC4x  
13 NC  
12 V  
FB  
IMP38C4x  
IMP38HC4x  
DD  
ISNS  
RT/CT  
OUT  
NC  
11 V  
D
GND  
ISNS  
NC  
10 OUT  
38C/HC_02.eps  
9
8
AGND  
RT/CT  
PGND  
38C/HC_03.eps  
Pin Descriptions  
Pin Number  
Name  
Function  
8-Pin Package  
14-Pin Package  
1
2
3
1
3
5
COMP  
FB  
Output of the Error amplifier and input to the PWM comparator.  
Inverting input of the Error Amplifier.  
ISNS  
Current sense comparator input. It is internally limited to 1V.  
Oscillator RC timing component connection. Resistor RT is connected to  
4
7
RT/CT  
VREF and capacitor CT is connected to ground. Different values of RT and  
CT determine the maximum duty cycle.  
Combined power and analog ground for 8-pin packaged devices and power  
ground for 14-pin package.  
5
6
8
GND/PGND  
OUT  
High-power, totem-pole driver output. OUT pin is actively held LOW when  
VCC is below the UVLO threshold.  
10  
7
8
12  
VDD  
VREF  
AGND  
VD  
Supply voltage input.  
14  
5V-reference voltage output.  
9
11  
Analog ground connection for 14-pin package.  
Output driver supply voltage for 14-pin package.  
No internal connection.  
2, 4, 6, 13  
NC  
38C-HC_t01.eps  
!S  
2
408-432-9100/www.impweb.com  
© 2000 IMP, Inc.  
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