TPS5430 5V12V15V Single Power to Dual Switching DC Power Supply Positive and Negative Power Supply
The default delivery provides modules of ±5V, ±12V, ±15V for customers to choose. When using ±15 power supply, the voltage difference between the supply voltage and the negative voltage should not exceed the safe voltage of the chip by 36V. It needs to be adjusted by itself. The output range of the module is preferably between ±3V and ±15V. The formula used by the user to configure the output voltage is R2=R1*1.221/VOUT-1.221) (positive pressure) requires +5V output. When R1 is 10KQ, R2 should be equipped with 324KQ. R4-R3*1:221/VOUT-1.221 (negative voltage), for example, requires 5/output. When R3 is 10KQ, R4 should be assigned 324KQ. This module is a step-down module. The input signal needs to be greater than the output 1V or more. If the output voltage is ±5V, the input voltage should be greater than 6V. Similarly, if you need to output ±12V, the input voltage should be greater than 13V; if you need to output ±15V, the input voltage should be greater than 16V. Module output current: positive pressure @3A (MAX) negative pressure @2A (MAX)
Parameters
| Name | TPS5430 positive and negative power module |
| Size | 50mmx5omm |
| Available voltage range | DC5.5V-36V |
Module introduction
The TPS5430 has good characteristics and its main parameters are as follows:
High current output: 3A (peak 4A); wide voltage input range; 5.5-3.6V; high conversion rate optimal state up to 95%.
Wide voltage output range: fixed 500kHz slew rate, overcurrent protection and thermal break function, with switch enable pin, off state only 17uA quiescent current internal soft start compared with other DC switch power conversion chips of the same type, TPS5430D high The conversion rate is more worthy of attention.
The TPS5430 module sold in this shop is a positive and negative power supply output, which is convenient for the buyer's project power supply design, although the official PDF gives a wide voltage range to 36V and a peak current of 4A. However, we hope that the buyer will not exceed 30V when using this module, the current is controlled within 2.5A. In addition, the actual measurement of the ripple of this baby is that the positive voltage is about 24mV and the negative voltage is about 60mV. It is very good for switching power supplies.
In addition, according to the experience of the owner using TPS5430, the actual conversion efficiency is not as high as 95% of the official, and the actual measured efficiency is about 88%. The negative pressure conversion rate is lower than the positive pressure.
Special Note: The store's baby details are mainly for positive and negative 5V output models, especially when using high power 10W (output 5V/2A, output 15V/0.67A) or above, please add heat sink grease fins, etc. The chip is cooled.
With better heat dissipation conditions, it is best to control the long-term operation within 30W (output 15V, 2A) to avoid damage to the chip.
The above two are the measured ripple map of the TPS5430 module, which may have slight differences due to the tolerance of each component. What needs to be known is that the larger the power supply, the larger the ripple; the larger the load, the larger the ripple.