Digital camera 5-channel power supply MAX1565

Digital camera 5-channel power supply MAX1565

Shown is the MAX1565 5-channel power supply for a digital camera . As can be seen from the figure, the chip is equipped with multi-channel pulse width signal generation and
control circuits. Different voltage stabilization methods are used according to the DC voltage value and current required by the digital camera . The DL3 pin of the chip outputs a 71 voltage PWM drive signal - making the external field effect transistor work in the switching state. A PWM pulse current is formed in the primary winding of the switching transformer Tl, and is output +15 respectively after the secondary rectification and filtering of the switching transformer Tl. V (20 mA) and 7.5 V (20 rnA). DL1 and DL2 terminals output boosted PWM signals, which output +5 V and +15 V voltages through the field effect switch tube and rectifier filter circuit respectively. There are also two sets of PWM circuits, which convert the DC voltage into switching pulses through their respective sets of switching field effect transistors. Then the DC voltage is output through the filter circuit to power circuits such as CPU.