Changsha Purple Horn E-Commerce Co., Ltd.
| Slot Width | 1.1mm |
| Description | 1.1mm Photointerrupters - Slot Type - Logic Output RoHS |
| Mfr. Part # | RPI-1133 |
| Model Number | RPI-1133 |
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Product Specification
| Slot Width | 1.1mm | Description | 1.1mm Photointerrupters - Slot Type - Logic Output RoHS |
| Mfr. Part # | RPI-1133 | Model Number | RPI-1133 |
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.
| 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 |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer
Year Established:
2009
Employee Number:
300~500
Ecer Certification：
Verified Supplier
Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...
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