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What is this triple-transistor arrangement called?

Why is a Transistor called a Transistor?Sanity check my first project: to control my air conditioner with a NestWhy are NPN Darlington transistors used to sink current?H-bridge with BJTs: why do IC and discrete solutions differ (or Sziklai vs Darlington)Delay/Disable Output Pin On Power On Using Electronicswhat are the specs of a transistor that can't be find on internet?Common transistor topologiesMixed NPN and PNP H-Bridge DC Motor DriverWhy is my transistor beta lower than expected?Why is the collector current I_c for a normal common emitter BJT circuit LARGER than that of the Darlington transistor circuit configuration?

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6

$begingroup$

For an old Fuji 2DI200D-100 power transistor module, it uses three transistors internally for each half-bridge:

The circuit in question doesn't connect to the middle bases at all, just B1 and B2, so this (dual) triplet is being used solely as two big transistors. Is this called a "triple Darlington pair?" "Darlington triple?" Or is there some other name for this arrangement?

transistors darlington power-modules

share|improve this question

edited 6 hours ago

rdtsc

asked 8 hours ago

rdtscrdtsc

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$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  I've seen it called a "trilington", but I don't think there is any "official" name for it.
  $endgroup$
  – Hearth
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  ”each half of an "H" bridge” For future reference, that’s called a half-bridge.
  $endgroup$
  – winny
  7 hours ago
  

  
  
  
  

add a comment | 

6

$begingroup$

For an old Fuji 2DI200D-100 power transistor module, it uses three transistors internally for each half-bridge:

The circuit in question doesn't connect to the middle bases at all, just B1 and B2, so this (dual) triplet is being used solely as two big transistors. Is this called a "triple Darlington pair?" "Darlington triple?" Or is there some other name for this arrangement?

transistors darlington power-modules

share|improve this question

edited 6 hours ago

rdtsc

asked 8 hours ago

rdtscrdtsc

5,21333 gold badges1313 silver badges3939 bronze badges

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  I've seen it called a "trilington", but I don't think there is any "official" name for it.
  $endgroup$
  – Hearth
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  ”each half of an "H" bridge” For future reference, that’s called a half-bridge.
  $endgroup$
  – winny
  7 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

For an old Fuji 2DI200D-100 power transistor module, it uses three transistors internally for each half-bridge:

The circuit in question doesn't connect to the middle bases at all, just B1 and B2, so this (dual) triplet is being used solely as two big transistors. Is this called a "triple Darlington pair?" "Darlington triple?" Or is there some other name for this arrangement?

transistors darlington power-modules

share|improve this question

edited 6 hours ago

rdtsc

asked 8 hours ago

rdtscrdtsc

5,21333 gold badges1313 silver badges3939 bronze badges

$endgroup$

share|improve this question

edited 6 hours ago

rdtsc

asked 8 hours ago

rdtscrdtsc

5,21333 gold badges1313 silver badges3939 bronze badges

share|improve this question

edited 6 hours ago

rdtsc

asked 8 hours ago

rdtscrdtsc

5,21333 gold badges1313 silver badges3939 bronze badges

asked 8 hours ago

rdtscrdtsc

5,21333 gold badges1313 silver badges3939 bronze badges

asked 8 hours ago

rdtscrdtsc

5,21333 gold badges1313 silver badges3939 bronze badges

1 Answer
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6

$begingroup$

They're called high current triplets.

I don't propose to cover high current followers in any great detail, because they are already explained in various other articles and projects on the ESP website. High current versions are typically used in the output stages of power amplifiers, and can be simple complementary Darlington pairs, Sziklai pairs or in some cases a triple (three devices in cascade), and using various mixtures of NPN and PNP transistors. There are many combinations, and it is hard to provide the detailed analysis that each deserves in a short article.

Instead, I will show some of the common variations, purely for interest's sake. If you want to know more, you will need to perform your own analysis because the choice of transistors determines how well each version will work in any given configuration. The selection of devices depends on the application, frequency range, voltage and current, and given the number of transistor types available, the number of combinations is truly vast.

In the drawings below, resistors between individual transistor base-emitter junctions are not shown. For high-current triples, Q2 could have an emitter-base resistor of around 220 ohms, and Q3 might use 22 ohms, but these values need to be determined by the application and to suit the devices and intended purpose. Higher resistances can increase the turn-off time, and lower values draw more current. This is part of the design process, and each case will be different.

Source: http://sound.whsites.net/articles/followers.html (section 11)

share|improve this answer

answered 7 hours ago

HuismanHuisman

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$endgroup$

add a comment | 

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6

$begingroup$

They're called high current triplets.

I don't propose to cover high current followers in any great detail, because they are already explained in various other articles and projects on the ESP website. High current versions are typically used in the output stages of power amplifiers, and can be simple complementary Darlington pairs, Sziklai pairs or in some cases a triple (three devices in cascade), and using various mixtures of NPN and PNP transistors. There are many combinations, and it is hard to provide the detailed analysis that each deserves in a short article.

Instead, I will show some of the common variations, purely for interest's sake. If you want to know more, you will need to perform your own analysis because the choice of transistors determines how well each version will work in any given configuration. The selection of devices depends on the application, frequency range, voltage and current, and given the number of transistor types available, the number of combinations is truly vast.

In the drawings below, resistors between individual transistor base-emitter junctions are not shown. For high-current triples, Q2 could have an emitter-base resistor of around 220 ohms, and Q3 might use 22 ohms, but these values need to be determined by the application and to suit the devices and intended purpose. Higher resistances can increase the turn-off time, and lower values draw more current. This is part of the design process, and each case will be different.

Source: http://sound.whsites.net/articles/followers.html (section 11)

share|improve this answer

answered 7 hours ago

HuismanHuisman

3,89711 gold badge44 silver badges2727 bronze badges

$endgroup$

add a comment | 

6

$begingroup$

They're called high current triplets.

I don't propose to cover high current followers in any great detail, because they are already explained in various other articles and projects on the ESP website. High current versions are typically used in the output stages of power amplifiers, and can be simple complementary Darlington pairs, Sziklai pairs or in some cases a triple (three devices in cascade), and using various mixtures of NPN and PNP transistors. There are many combinations, and it is hard to provide the detailed analysis that each deserves in a short article.

Instead, I will show some of the common variations, purely for interest's sake. If you want to know more, you will need to perform your own analysis because the choice of transistors determines how well each version will work in any given configuration. The selection of devices depends on the application, frequency range, voltage and current, and given the number of transistor types available, the number of combinations is truly vast.

In the drawings below, resistors between individual transistor base-emitter junctions are not shown. For high-current triples, Q2 could have an emitter-base resistor of around 220 ohms, and Q3 might use 22 ohms, but these values need to be determined by the application and to suit the devices and intended purpose. Higher resistances can increase the turn-off time, and lower values draw more current. This is part of the design process, and each case will be different.

Source: http://sound.whsites.net/articles/followers.html (section 11)

share|improve this answer

answered 7 hours ago

HuismanHuisman

3,89711 gold badge44 silver badges2727 bronze badges

$endgroup$

add a comment | 

$begingroup$

They're called high current triplets.

I don't propose to cover high current followers in any great detail, because they are already explained in various other articles and projects on the ESP website. High current versions are typically used in the output stages of power amplifiers, and can be simple complementary Darlington pairs, Sziklai pairs or in some cases a triple (three devices in cascade), and using various mixtures of NPN and PNP transistors. There are many combinations, and it is hard to provide the detailed analysis that each deserves in a short article.

Instead, I will show some of the common variations, purely for interest's sake. If you want to know more, you will need to perform your own analysis because the choice of transistors determines how well each version will work in any given configuration. The selection of devices depends on the application, frequency range, voltage and current, and given the number of transistor types available, the number of combinations is truly vast.

In the drawings below, resistors between individual transistor base-emitter junctions are not shown. For high-current triples, Q2 could have an emitter-base resistor of around 220 ohms, and Q3 might use 22 ohms, but these values need to be determined by the application and to suit the devices and intended purpose. Higher resistances can increase the turn-off time, and lower values draw more current. This is part of the design process, and each case will be different.

Source: http://sound.whsites.net/articles/followers.html (section 11)

share|improve this answer

answered 7 hours ago

HuismanHuisman

3,89711 gold badge44 silver badges2727 bronze badges

$endgroup$

share|improve this answer

answered 7 hours ago

HuismanHuisman

3,89711 gold badge44 silver badges2727 bronze badges

answered 7 hours ago

HuismanHuisman

3,89711 gold badge44 silver badges2727 bronze badges

answered 7 hours ago

HuismanHuisman

3,89711 gold badge44 silver badges2727 bronze badges