STEVAL-ISQ009V1 Load share controller demonstration board based on the L6615

The STEVAL-ISQ009V1 demonstration board is composed of three identical sections (daughterboards) and a motherboard.

Each daughterboard is capable of performing DCDC conversion starting from +5 VDC and is designed to deliver 3.3 V / 5 A to the load.

The input terminals of the motherboard are connected to a +5 VDC external source and the output terminals to the load. The board can accommodate up to three DC-DC converters.

The motherboard contains the circuitry necessary to perform current sharing (utilizing the L6615) and to isolate a failed section from the load. It is designed to be adaptable to all power supplies (compatible with the L6615 absolute maximum ratings) having remote sense pins. By changing just a few components, it can be modified for new specifications.

It is possible to build a system to supply a 10 A load at +3.3 V in a 2+1 redundant configuration.

That is, whenever three sections are running, each of them supplies 3.33 A, a value lower than its nominal capability.

If one of them is switched off, the system is able to supply the load, and each section carries 5 A.

DC-DC conversion management is performed by the L6910.

It is possible to verify that disabling one section (through the relevant switch on the motherboard) does not cause overvoltage on the output or overcurrent in other sections. In the same way, enabling one section (with the other two already running) does not cause negative output voltage drop or a short to ground, and current sharing is established.

技术特性

Three paralleled DC-DC converter modules (in synchronous buck topology, managed by ST’s L6910)
Output currents shared through ST current sharing controller L6615
Innovative use of a MOSFET as both the ORing element (replacing OR-ing diode) and sensing element (RDS(on))
RoHS compliant

功能框图

STEVAL-ISQ009V1 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
STEVAL-ISQ009V1	Active		1000

DATA BRIEF

描述	版本	大小
STEVAL-ISQ009V1 : Load share controller demonstration board based on the L6615	1	152KB

APPLICATION NOTES

描述	版本	大小
AN2787: Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications	1	2594KB
AN2936: 10 W SMPS with HV power MOSFET and the L6565 for three-phase industrial applications	1	303KB

BILL OF MATERIALS

描述	版本	大小
Bill of materials	1.0	45KB

SCHEMATIC PACKS

描述	版本	大小
Board schematic	1.0	61KB

PCB LAYOUTS

描述	版本	大小
PCB layout	1.0	521KB