hi
I set 2 buck/boost converters (see specs below) powered by a small ~12 volt solar/battery/ regulator system.
2 x 80watt pv's, 1 X12v batt, 1 x 10 amp regulatory.
The 2 buck/boost converters - 1 used & set at 10v output for a laptop (solid circuit, no rotating disc) ~2.2A.
- 1 used & set @ 14v for an led 22" monitor, 2.3A.
Both had 2amp fuses on the + lead into the buck/boost converters.
(So the buck/boost converters replaced the transformers & the correct voltage & polarity was set & used to power my laptop & Monitor.)
RESULT; The buck/boost converter powering the laptop (Laptop battery in place, so via its battery) powered the battery & laptop, but made a slight buzzing sound coming from the laptop, I adjusted the buck/boost converter to slightly higher voltage output which seemed to quiet it (mostly). Note I have used an Auto laptop converter in the pass with no buzzing & it worked fine, I figured the buck/boost converter would be exactly the same, but perhaps my circuit is missing a component (present in the Auto laptop converters).
The LED Monitor worked but intermittently would go dark for a second, then the image would reappear. I disconnected the laptop buck/boost converter, but the monitor still malfunctioned in the same way.
I disconnected the buck/boost converter from the monitor & reconnected it again with the same multifunctional result. On the 3rd attempt in as many minutes < 3 min usage total, the buck/boost converter died & output < 1v.
Any ideas what I did wrong?
buck/boost converters ;
This module is a LM2577 DC-DC Automatic Buck or Boost Converter 3-35V to 2.2-30V LM2596 Voltage Step-Down Power Supply. IN+ is for positive voltage input. IN- is for negative voltage input.
That means after you set the output voltage, it can output your desired voltage no matter the input voltage is LESS or GREATER than your desire voltage.
Step-up or Step-down action is automatic.
Great for solar panel supply, solar panel input voltage is not constant. Therefore it can output constant voltage
Module properties: Non isolated, Automatic Buck-Boost (SEPIC)
Rectifier type : Non synchronous rectifier
Input voltage : 3V-35V
Output voltage: 2.2V-30V
Output current: 2A MAX
Conversion efficiency: 92% ( highest)
Switching frequency: 50KHz
Output ripple : 40mV MAX
Load regulation rate: ± 0.5% Voltage regulation rate: ± 0.5%
Working temperature: - 40C to +85C
Dimension:48 x 24 x 14mm
Typical output, do not need heatsink (reference)
Input 12V----Output 12V/2A; 24W
Input 12V----Output 5V/3A; 15W
Input 12V----Output 13.8V/1.8A; 25W
Input 5V----Output 3.3V/3A; 9.9W
I set 2 buck/boost converters (see specs below) powered by a small ~12 volt solar/battery/ regulator system.
2 x 80watt pv's, 1 X12v batt, 1 x 10 amp regulatory.
The 2 buck/boost converters - 1 used & set at 10v output for a laptop (solid circuit, no rotating disc) ~2.2A.
- 1 used & set @ 14v for an led 22" monitor, 2.3A.
Both had 2amp fuses on the + lead into the buck/boost converters.
(So the buck/boost converters replaced the transformers & the correct voltage & polarity was set & used to power my laptop & Monitor.)
RESULT; The buck/boost converter powering the laptop (Laptop battery in place, so via its battery) powered the battery & laptop, but made a slight buzzing sound coming from the laptop, I adjusted the buck/boost converter to slightly higher voltage output which seemed to quiet it (mostly). Note I have used an Auto laptop converter in the pass with no buzzing & it worked fine, I figured the buck/boost converter would be exactly the same, but perhaps my circuit is missing a component (present in the Auto laptop converters).
The LED Monitor worked but intermittently would go dark for a second, then the image would reappear. I disconnected the laptop buck/boost converter, but the monitor still malfunctioned in the same way.
I disconnected the buck/boost converter from the monitor & reconnected it again with the same multifunctional result. On the 3rd attempt in as many minutes < 3 min usage total, the buck/boost converter died & output < 1v.
Any ideas what I did wrong?
buck/boost converters ;
This module is a LM2577 DC-DC Automatic Buck or Boost Converter 3-35V to 2.2-30V LM2596 Voltage Step-Down Power Supply. IN+ is for positive voltage input. IN- is for negative voltage input.
That means after you set the output voltage, it can output your desired voltage no matter the input voltage is LESS or GREATER than your desire voltage.
Step-up or Step-down action is automatic.
Great for solar panel supply, solar panel input voltage is not constant. Therefore it can output constant voltage
Module properties: Non isolated, Automatic Buck-Boost (SEPIC)
Rectifier type : Non synchronous rectifier
Input voltage : 3V-35V
Output voltage: 2.2V-30V
Output current: 2A MAX
Conversion efficiency: 92% ( highest)
Switching frequency: 50KHz
Output ripple : 40mV MAX
Load regulation rate: ± 0.5% Voltage regulation rate: ± 0.5%
Working temperature: - 40C to +85C
Dimension:48 x 24 x 14mm
Typical output, do not need heatsink (reference)
Input 12V----Output 12V/2A; 24W
Input 12V----Output 5V/3A; 15W
Input 12V----Output 13.8V/1.8A; 25W
Input 5V----Output 3.3V/3A; 9.9W