1.Overview LC LM2662 positive conversion to negative voltage module carry a LM2662 high precision voltage conversion chip, it can conversion 1.5V-5.5V Positive voltage to corresponding the negative voltage.
2.The function and characteristics ● Effective input voltage of 1.5 V to 5.5 V
● Internal crystals of oscillation frequency is adjustable
● A typical output resistance 3.5 ohms
3. Introduced the hardware and instructions ● Size: 20*10mm
● The board function description:
V + : positive voltage input
GND: switching power supply
V - : negative voltage output
When the FC in short two solder joint can choose internal crystal frequency is 150 KHZ, disconnected internal crystals to 20 KHZ;
When the input voltage is less than 3.5 V LV place two bonding pad should be short, when the input voltage is greater than 3.5 V to be disconnected.
![](http://test.bifelectronic.com/presta/img/cms/images/LC-Power-26621.jpg)
![](http://test.bifelectronic.com/presta/img/cms/images/LC-Power-26622.jpg)
![](http://test.bifelectronic.com/presta/img/cms/images/LC-Power-26623.jpg)