參數(shù)資料
型號(hào)： P62000NLG8
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, QCC64
封裝： ROHS COMPLIANT, QFN-64
文件頁(yè)數(shù)： 24/62頁(yè)
文件大?。?/td> 1221K
代理商： P62000NLG8
IDTP62000
2/3/4-PHASE PWM CONTROLLER WITH DYNAMIC VOLTAGE & FREQUENCY SCALING
IDT 2/3/4-PHASE PWM CONTROLLER WITH DYNAMIC VOLTAGE & FREQUENCY SCALING
30
IDTP62000
REV E 050510
CONFIDENTIAL
In the event that the 12 V rail collapses during an OVP event (thus causing a POR reset to occur) the IDTP62000 will hold
the low-side N-FETs in asserted state and thus the VCORE will never be exposed to high voltage conditions. In the most
severe case of an OVP condition, the CPU will always be protected.
Overcurrent Detection
The IDTP62000 contains two methods to protect the system from dangerous system events. The first method involves
comparing the average of the sensed active phase currents with IOCAVG = 2.5*IREF.
If a converter over current event is detected and is present for more than 15 microseconds the IDTP62000 will turn off all
the MOSFET drivers, and will de-assert the PGOOD pin. The IDTP62000 will stay in this mode for 12 ms. At the end of this
fixed time, a soft-start will be attempted. If the over current condition still exists at the end of soft-start, the IDTP62000 will
repeat for one more cycle by waiting for another 12 ms and re-entering soft-start again (otherwise normal operation will
resume). If an OCP condition is encountered during the second attempt the IDTP62000 will latch off all the internal power
MOSFET gate drivers as well as pin PWM 4 for the external MOSFET gate driver. Once in this OCP state, the PWM must
be power cycled (or soft reset) in order to bring it out of latched off mode. This sequence of detection of OCP, attempts at a
soft-start, and checking for another OCP is defined as a Auto Retry Mode.
The second over current protection method is cycle by cycle termination of a PWM pulse if any individual sensed phase
current exceeds IOCPH = 3*IREF.
Figure 25: Overcurrent Behavior in Auto Retry Mode
Output Voltage Setting (VID)
The IDTP62000 supports a standard 6-bit DAC for Intel VR10 with the addition of an extra LSB bit (VID6) to provide 6.25 mV
steps over the range 1.6 V down to 0.83125 mV.
Intel R11.1 VID Mode Codes
IDTP62000 supports an 8-bit DAC for Intel VR11.1. Each step is 6.25 mV from 1.6 V down to 0.5 V.
Table 5: VID Mapping for Intel VR11.1 Mode
0A
0V
OUTPUT VOLTAGE
, 500mV/ DIV
6ms/ DIV
LATCH OFF
OUTPUT CURRENT
, 50A/ DIV
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
800 mV 400 mV 200 mV 100 mV
50 mV
25 mV
12.5 mV 6.25 mV
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