Bueno pues al final me he decidido y por lo que valen he pedido 3 de estos de 3 Amperios:
http://www.ebay.ca/itm/1-DC-DC-Buck-Con ... 1409861491?
Input voltage: 4V-35V Output voltage: 1.23V-30V Input current: 3A(maximum) Conversion efficiency: 92%(highest) Switching frequency: 150KHz Output ripple: 30mA9maxmum) Load regulation: ±0.5% Voltage regulation: ±2.5% Work temperature: -40℃- +85℃.
Y otros 3 como estos de 5 Amperios:
http://www.ebay.ca/itm/1-25V-36V-5A-DC- ... OU:ES:3160
Specification:
Module highlights: 5A high power, high efficiency and low ripple with power indicator
Module Properties: non-isolated buck module (BUCK)
Input voltage: 4-38V (input please try not to exceed 38V)
Output voltage: 1.25-36V continuously adjustable
Output Current: 0-5A
Output Power: 75W
Operating temperature: -40 to +85 degrees
Operating frequency: 180KHz
Conversion efficiency: up to 96%
Load regulation: S (I) ≤0.8% (input 24V, output 12V, load varies from 1 ~ 4.5A measured)
Voltage Regulation: S (u) ≤0.8% (output 12V, when 4A, when 18 ~ 32V voltage change from the measured)
Power Indicator: Yes
Short circuit protection: Yes (limit current 8A)
Overtemperature protection: (automatically shut off the output after overtemperature)
Input reverse polarity protection: No, (if necessary, please enter the string into the high current diode)
Installation: two 3mm screws
Connection: Welding, V-IN is the input, V-OUT is the output
Module dimensions: 54*23*15mm(L*W*H)
Application:
The DC/DC buck module applications the input voltage is higher than the output voltage of the buck field, such as battery, power transformer, DIY adjustable regulated power supply, 24V Vehicle notebook power supply,industrial equipment buck.12V buck to 3.3V, 12V buck to 5V, 24V buck to 5V,24V buck to 12V, 36V buck to 24V etc.
Package Included:
1 x Step Down Module
1 x Heatsink
A ver que sale de esto y si me puedo ahorrar las lipo de 1S.
Felices fiestas a todos y prospero año nuevo, que esperemos sea mejor que este que dejamos atras.
Un saludo a todos