Electronic Component – TPS54625PWPR

short description:

Voltage regulators are specially designed for ac brushless generators equipped with fundamental waves, harmonic compound excitation or AC brushless generators equipped with permanent magnet generator excitation (PGM system).
The voltage regulator realizes the automatic adjustment of the output voltage of the generator by controlling the excitation current of the alternating current of the alternating current of the alternator. The generator voltage regulator can meet the needs of ordinary 60/50Hz and medium frequency 400Hz stand-alone or parallel operation of generators.

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Product Detail

Product Tags

Product Attributes

TYPE	DESCRIPTION
Category	Integrated Circuits (ICs) PMIC - Voltage Regulators - DC DC Switching Regulators
Mfr	Texas Instruments
Series	D-CAP2™
Package	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®
Product Status	Active
Function	Step-Down
Output Configuration	Positive
Topology	Buck
Output Type	Adjustable
Number of Outputs	1
Voltage - Input (Min)	4.5V
Voltage - Input (Max)	18V
Voltage - Output (Min/Fixed)	0.765V
Voltage - Output (Max)	5.5V
Current - Output	6.5A
Frequency - Switching	650kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package	14-HTSSOP
Base Product Number	TPS54625
SPQ	2000/pcs

Basic classification

1. Alternator voltage regulator can be divided into: according to the working principle:
(1) Contact voltage regulator
Contact voltage regulator is applied earlier, this regulator contact vibration frequency is slow, there is mechanical inertia and electromagnetic inertia, low voltage regulation accuracy, contact easy to produce sparks, large radio interference, poor reliability, short life, has been eliminated.
(2) Transistor regulator
With the development of semiconductor technology, transistor regulators have been adopted. Its advantages are: the transistor switching frequency is high, and does not produce sparks, high adjustment accuracy, but also has the advantages of light weight, small size, long life, high reliability, small radio interference, etc., and is now widely used in Dongfeng, Jiefang and a variety of low-end models.
3) Integrated circuit regulator
In addition to the advantages of transistor regulators, integrated circuit regulators are also ultra-small, mounted inside the generator (also known as built-in regulators), reducing external wiring, and the cooling effect has been improved, and is now widely used in Santana. Audi and other sedan models.
(4) Computer-controlled regulator
After measuring the total load of the system by the electric load detector, the signal is sent to the generator computer, and then the generator voltage regulator is controlled by the engine computer, and the magnetic field circuit is turned on and off in a timely manner, that is, the normal operation of the electrical system can be reliably guaranteed, the battery can be charged sufficiently, and the engine load can be reduced and the fuel economy can be improved. For example, Shanghai Buick, Guangzhou Honda and other car generators use this regulator.

2. Voltage regulator
According to the matching alternator iron type can be divided into:
(1) Inner iron type regulator
The voltage regulator suitable for matching with the internal tie-type alternator is called the internal tie-type regulator;
(2) External iron type regulator
The voltage regulator suitable for matching with the external tie-type alternator is called the outer tie-iron regulator.

In the process of use, for the transistor regulator, it is best to use the regulator specified in the car manual, if other models are used to replace, in addition to the nominal voltage and other specified parameters and the original regulator is the same, the substitute regulator must be the same as the original regulator's iron form, otherwise, the generator may not work properly due to the excitation circuit. For integrated circuit regulators, they must be dedicated and cannot be replaced.

Use maintenance

The regulator is generally not allowed to disassemble the cover during use, and the normal situation is to carry out a comprehensive inspection and maintenance every 200h or so, and its content is as follows:

1.Remove the case and inspect the contact surface for dirt and burn damage. If there is dirt, wipe the contact surface with a cleaner paper. If the contact is ablated or uneven and the contact is poor, it is generally smoothed with "00" sandpaper or sand strip, and finally wiped with clean paper.

2.Check the firmness of each connector, measure the resistance and the resistance value of each coil. If there is damage, it should be repaired or replaced with a new part in time.

3.Check the closing voltage and back current of the current breaker, the limit voltage of the voltage reducer, the limit current of the current limit of the current stopper, and the gaps and air gaps of various contacts. If it does not meet the requirements, it should be adjusted.

4.Check the adjusted regulator and pay attention to the indication of the charging ammeter pointer when starting the diesel engine. If the needle of the ammeter is still pointing to the "-" side when the diesel engine is running at a medium speed or above, this means that the contact of the current breaker is not disconnected, and the ground switch should be quickly disconnected; Otherwise, it will damage the battery, regulator, charging generator, etc. If the needle of the ammeter still points to "0" after the diesel engine starts to the rated speed, the adjustment of the description is not adjusted according to the technical requirements, and it should be re-checked and adjusted.

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