LM5069 – Hot Swap Controller / Load Switch / Battery Switch
Load Switch / battery switch based on the LM5069 for 10-50V input voltage and 120A +.
To use the 1200W Boostwandlers in combination with the TPA3255 amp to sealed lead / SLA, Li-Ion or other sources, an electronic switch is necessary, the above-mentioned destructive power parameters up to 3000uF output capacity and can switch off or wear-free. The whole please with switching input and isolated PG signal as an open drain. Connections optionally as a M4 screw, XT60 or XT90 connector.
The choice is for the LM5069-2 Texas Instruments combined with suitable FETs (SOA limit). Durable enough appear here Alpha & Omega AOT(B)290L (Unfortunately EOL) and NXP PSMN3R7-100BSE, Critical here is the SOA limit for switching times / peaks in linear / DC area. Nearly all modern TrenchFETs provide only still current capabilities far below the specified peak performance. (Often smaller 1A to 100A types)
Circuit diagram
LM5069_Rev0_Schematic
Hardware Revision 0
LM5069 Load Switch PCB M4 Terminals
LM5069 Load Switch PCB XT60 + M4 Terminals
LM5069 Load Switch PCB XT90 + M4 Terminals
LM5069 Load Switch PCB XT90
LM5069 Load Switch PCB Variation
The use of the LM5069-2 in this high-capacity load switch design demonstrates sophisticated power management, particularly in handling inrush current for a 3000µF capacitance through precise soft-start control. For Electrical Engineering students, the integration of a MOSFET with strict Safe Operating Area (SOA) limits and the isolation of the “Power Good” signal via an optocoupler offer valuable lessons in designing robust, safe electronic systems for heavy-load applications.
TANKE YOU
LM5069 – Hot Swap Controller / Load Switch / Battery Switch—— Are these available for purchase?