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SS9176CS-6TR Datasheet(PDF) 9 Page - Silicon Standard Corp. |
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SS9176CS-6TR Datasheet(HTML) 9 Page - Silicon Standard Corp. |
9 / 12 page www.SiliconStandard.com 9 of 12 SS9175/6 Current sharing application using SS9175CS This current-sharing circuit is implemented using SS9175CS. The dual phase MOSFETs can be supplied from different supply voltages (in this case, from 12V for channel 2, and 5V for channel 1). They can be supplied from the same supply voltage, too. As there is only a single output voltage (1.4V in this case), the divided voltage is fed back to the IN1 pin. The VCC supply voltage can be either 12V or 5V, depending on the convenience of PCB layout, but VCC = 12V is recommended. If VCC > 6.5V, the BSTC output is fixed at 6V. This BSTC voltage is used as the supply voltage for the bootstrap circuit’s diodes input. A 10uF capacitor is recommended for BSTC decoupling. A 1k resistor is connected from CL2+ to the MOSFET’s high-side voltage. This 1k resistor is used to program the OCP level. 12V 1.4v 5V PWRG CL1+ CL1- DH1 DL1 BST1 PGND COMP1 VCC PWRGD IN1 CL2+ CL2- DH2 DL2 BST2 BSTC COMP2 SS/ENB GND IN2 1uF 1uF 7.5uH 1k 7.5uH 1k 2.2pF 450uF 0.22uF 50k 50k 10uF APPLICATION INFORMATION (cont.) Rev.2.02 12/29/2003 PRELIMINARY |
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