2
AN1460.1
July 13, 2009
DIP-Switch Descriptions
• S1: Set the control signals
- S1.1: Set the DPRSLPVR signal
- S1.2: Set the PSI# signal
• U2: Set the VID
Jumper Descriptions
• J1: Set the ISEN2 pin configuration. ISEN2 can be
connected to the power stage, tied to +5V, GND or left
floating. Connect ISEN2 to the power stage when the
ISL62883 is configured for 3-phase or 2-phase
application. Tie ISEN2 to 5V when the ISL62883 is
configured for 1-phase application.
• J2: Set the ISEN1 pin configuration. ISEN1 can be
connected to the power stage, tied to +5V, GND or left
floating. Connect ISEN1 to the power stage when the
ISL62883 is configured for 3-phase, 2-phase application.
Leave ISEN1 floating when the ISL62883 is configured for
1-phase application
• J3: If installed, the ISEN3/FB2 pin will be connected to the
power stage. If uninstalled, the ISEN3/FB2 pin will be
disconnected from the power stage. Install J3 when the
ISL62883 is configured for 3-phase application. Uninstall
J3 when the ISL62883 is configured for 2-phase or
1-phase application.
• J4: Set the PWM3 pin configuration. PWM3 can be
connected to the ISL6208 driver, tied to +5V, GND or left
floating. Connect PWM3 to the ISL6208 driver when the
ISL62883 is configured for 3-phase application. Tie PWM3
to 5V when the ISL62883 is configured for 2-phase or
1-phase application.
• J16: If installed, the +5V rail supplies the +3.3V rail to the
auxiliary circuit on the board.
DO NOT APPLY +3.3V TO
TP37/TP30 WHILE J16 IS INSTALLED! IT’LL SHORT
THE +5V AND THE +3.3V POWER SUPPLIES
. When
measuring board efficiency, uninstall J16 and apply +3.3V
to TP/37/TP30.
Test-point Descriptions
• J7: Scope-probe socket for measuring PHASE1
• J8: Scope-probe socket for measuring PHASE2
• J9: Scope-probe socket for measuring PHASE3
• J10: Scope-probe socket for measuring V
O
• J15: Scope-probe socket for measuring the current of the
on-board transient-load emulator
• TP1: Monitor the on-board 1.2V power supply
• TP2: +12V power supply return input.
• TP3: +12V power supply positive input.
• TP4: Monitor the COMP pin
• TP5: Monitor the VW pin.
• TP6: Monitor the FB pin.
• TP7: Monitor the DPRSLPVR pin.
• TP8: Monitor the VR_TT# pin.
• TP9: Monitor the PSI# pin.
• TP10: Monitor the ISEN3/FB2 pin.
• TP11: Monitor the ISEN2 pin.
• TP12: Input side of the compensator.
• TP13: Monitor the PGOOD pin.
• TP14: Monitor the VSEN pin.
• TP15: Monitor the ISEN1pin.
• TP16: Monitor the CLK_EN# pin.
• TP17: Monitor the VR_ON pin
• TP18: Monitor the RTN pin.
• TP19: Monitor the positive side of C82.
• TP20: Monitor the negative side of C82.
• TP21: Monitor the VID6 pin.
• TP22: Monitor the VID5 pin.
• TP23: Monitor the VID4 pin.
• TP24: Monitor the VID3 pin.
• TP25: Monitor the VID2 pin.
• TP26: Monitor the VID1 pin.
• TP27: Monitor the VID0 pin.
• TP28: Monitor the IMON pin.
• TP29: +5V power supply positive input.
• TP30: +5V power supply return input.
• TP31: V
IN
positive voltage sense
• TP32: V
IN
return voltage sense
• TP33: Monitor MOSFET Q3 gate signal
• TP34: Monitor MOSFET Q9 gate signal.
• TP35: Monitor the VCCSENSE pin of the CPU socket U4.
• TP36: Monitor the VSSSENSE pin of the CPU socket U4.
• TP37: +3.3V power supply positive input.
• TP38: Monitor the VTT1 rail of the CPU socket U4.
• TP39: Monitor the VTT2 rail of the CPU socket U4.
Application Note 1460
