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1.4-8

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AS3635

Datasheet - D e t a i l e d D e s c r i p t i o n

Trimming Procedure

and diode. The trimming procedure is performed as follows:

Figure 19. AS3635 trimming circuit

2

1. The production test equipment starts a charging cycle (CHARGE=1) and waits until DONE=0

3. The trimmode control is unlocked using a special sequence

4. The one time programmable memory (OTP) is programmed with the above calculated code

5. The trimmode control can be disabled by fusing the OTP bit trimm_lock

See austriamicrosystems application note ‘AN3635_In-Production_Trimming’ for a detailed description of the trimming

setup and the trimming procedure.

2. The internal voltages (e.g. +3.4V/-2.8V/32.4V) are internally scaled to fit in the supply voltage range







 

 





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AS3635