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Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Specifications
Slot Width :
1.1mm
Description :
1.1mm Photointerrupters - Slot Type - Logic Output RoHS
Mfr. Part # :
RPI-1133
Model Number :
RPI-1133
Description

Product Overview

This document provides a detailed example calculation for determining the appropriate load resistance (RL) for the RPI-221, a component likely used in photointerrupter applications. The calculation considers customer circuit parameters, forward current (IF), minimum collector current (IC), and the impact of aging on infrared LED light emitting capacity. The objective is to ensure the load resistor satisfies specific threshold voltage requirements (VHi and VLo) within the customer's circuit, thereby defining a suitable operating range for the load resistance.

Product Attributes

  • Product Model: RPI-221 (example used for calculation)

Technical Specifications

Parameter Value Notes
Customer Circuit VCC 5V
Customer Circuit IF 20.6mA
ROHM SPEC IC Min (for IF=20mA) 0.2mA
Calculated IC Min (for IF=20.6mA) 0.21mA
Aging Factor (Light Emission Decrease over 10 years) 50% (0.5)
Adjusted IC Min (considering aging) 0.105mA
Infrared Emitting Diode VF 1.3V
Customer Circuit VHi Threshold 3.8V or higher Estimation value
Customer Circuit VLo Threshold 1.0V or lower Estimation value
Maximum Dark Current (Iceo max) 10A Assumed value
Calculated RL Min > 36k Derived from VHi threshold
Calculated RL Max < 100k Derived from VLo threshold and Iceo max
Resulting Load Resistance Range 36k < RL < 100k
Infrared LED Service Life (rated input current) 100,000 hours Assumes life completes at 50% light emitting capacity

2404071830_ROHM-RPI-1133_C3656419.pdf

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Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component

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Product Detail
Slot Width :
1.1mm
Description :
1.1mm Photointerrupters - Slot Type - Logic Output RoHS
Mfr. Part # :
RPI-1133
Model Number :
RPI-1133
Contact Supplier
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component
Load resistance calculation and operating range details for ROHM RPI-1133 photointerrupter component

Changsha Purple Horn E-Commerce Co., Ltd.

Verified Supplier
1 Years
hunan, changsha
Since 2009
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Importer
Main Products :
Analog and Digital Output, Pressure Sensors, Transducers, Sensor, Transducer Amplifiers
Employee Number :
300~500
Certification Level :
Verified Supplier
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