ISL6112 データシートの表示（PDF） - Renesas Electronics
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ISL6112 Datasheet PDF : 30 Pages
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ISL6112
“SMI-only Control Applications” on page 18). The ISL6112 can be
operated exclusively from either the SMI or HPI, or can employ
the HPl for power control while continuing to use the SMI for
access to all but the power control registers.
In addition to the basic power control features of the ISL6112
accessible by the HPI, the SMI gives the host access to the
following information from the part:
• Fault conditions occurring on each supply. These faults include
overcurrent, over-temperature and undervoltage.
• GPI pin status when using the system.
VVAAUUXX
When using the SMI for power control, the HPI must not be used.
Conversely, when using the HPI for power control, power control
commands must not be executed over the SMI bus. All other
register accesses via the SMI bus remain permissible while in HPI
control mode. When using SMI exclusively, the HPI input pins (ON,
AUXEN, and FORCE_ON) should be configured as shown in Figure
27 (disabling HPI when SMI control is used). This configuration
safeguards the power slots if the SMBus communication link is
disconnected for any reason.
When using HPI exclusively, the SMBus (or SMI) will be inactive if
the input pins (SDA, SCL, A0, A1, and A2) are configured as
shown in Figure 27.
12VOUT
AAUUXXEENN
12VGATE
12IOUT
IIAAUUXX
CFILTER
CGD = 6800pF
CGS = 22nF
FIGURE 17. VAUX TURN-ON RLOAD = 10Ω, CLOAD = 100µF
3VOUT
FIGURE 18. 12VMAIN START-UP RLOAD = 10Ω, CLOAD = 470µF
12VOUT
3VGATE
3IOUT
CFILTER
CFILTER RESPONDING TO UNSHOWN MAIN SUPPLY
CGATE = 22nF
FIGURE 19. 3VMAIN START-UP RLOAD = 2Ω, CLOAD = 470µF
12VGATE
12IOUT
CFILTER
CGD = 6800pF
CGS = 2200pF
FIGURE 20. 12VMAIN START-UP RLOAD = 10Ω, CLOAD = 470µF
FN6456 Rev 1.00
August 25, 2011
Page 13 of 30
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