PS1 Triple Output Power Supply

The PS1 power converter is designed to operate from a 12 V battery and provide computer supply voltages of +5 V, and ±12 V. It also includes voltage and current sensing outputs for power management of battery-operated, mobile, or remote applications.

±12 V out regulation: linear regulators 78L12 and 79L12

Input: 8 V to 18 V for 5 V; 11 V minimum input for ±12 V regulation

+5 V output ripple: ±20 mV pk-pk at switching frequency

+5 V output switching spikes: 100 mV pk-pk

SEPIC topology – allows input voltage to be less than output voltage

2 ´ 3 ´ 1 inch board layout

Two series-diode inputs for alternate power sources (battery and generator)

0.2 W high-side input-current sense resistor and input voltage sense on 4-pin connector

Input connectors (left side, above picture): 0.25 inch quick-disconnect, top to bottom: +VOUT (converter side of sense R), +VIN1, +VIN2, GND, GND, GND

Output connector (right side of picture): 4-pin header (top to bottom): +12 V, +5 V, GND, –12 V

Sense connector (upper right): 4-pin header (left to right): +VB (power in voltage), –VB (gnd), +IB (+VB side of sense R), –IB (converter side of sense R)

LM2577T converter IC 

Switching frequency: 52 kHz

PS1 Pricing