It functions like a normal NPN transistor, but since it has a Darlington pair inside it has a good collector current rating of about 5A and a gain of about It can also withstand about V across its collector- Emitter hence can be used to drive heavy loads. The Darlington pair inside this transistor is shown clearly as its internal circuit schematic below. As you can see, there are two transistors inside this TO package in which the emitter of the first transistor is connected with the base of the second transistor and the collector of both transistors are connected together to form a Darlington pair. This increases the current gain and current rating of this transistor. This transistor has a low Base-Emitter Voltage of the only 5V hence can be easily controlled by a Logic device like microcontrollers.
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Production processing does not necessarily include testing of all parameters. Minimum h. Pin 2 is in electrical contact with the mounting base. NOTES: 1. This value applies for t. Collector-base voltage I. Collector-emitter voltage I. Emitter-base voltage. Continuous collector current.
Peak collector current see Note 1. Continuous base current. Unclamped inductive load energy see Note 4. Operating junction temperature range. Storage temperature range. Lead temperature 3. NOTES: 5.
These parameters must be measured using pulse techniques, t. These parameters must be measured using voltage-sensing contacts, separate from the current carrying contacts. Voltage and current values shown are nominal; exact values vary slightly with transistor parameters. Collector cut-off. Emitter cut-off. Forward current. Parallel diode. Figure 1. Figure 2. Figure 3. CE sat. BE sat. Figure 4.
Figure 5. TO 3-pin plastic flange-mount package. This single-in-line package consists of a circuit mounted on a lead frame and encapsulated within a plastic compound. The compound will withstand soldering temperature with no deformation, and circuit performance characteristics will remain stable when operated in high humidity conditions.
Leads require no additional cleaning or processing when used in soldered assembly. The centre pin is in electrical contact with the mounting tab.
Mounting tab corner profile according to package version. Typical fixing hole centre stand off height according to package version. Version 1, Version 2, Search datasheet 1.
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Datasheet TIP117 - STMicroelectronics DARLINGTON TRANSISTOR, TO-220