LTC1647-1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1647-1' PDF : 20 Pages View PDF
LTC1647-1/LTC1647-2/LTC1647-3
APPLICATIO S I FOR ATIO
3.3V VID
SUPPLY
R1
0.1Ω
ON1
FAULT 1
DEVICE BAY
CONTROLLER
WITH 1394 PHY
AND/OR USB
ON2
FAULT 2
R5
10Ω
C3
0.1µF
R6
10Ω
C6
0.1µF
R7
0.1Ω
Q1
1/2 MMDF3N02HD
R2
10Ω
8
6
SENSE 1 GATE 1
1
2 VCC
ON1/FAULT 1
3
LTC1647-2
ON2/FAULT 2
4
GND
SENSE 2 GATE 2
7
5
R8
10Ω
Q2
1/2 MMDF3N02HD
R3**
DEVICE #1
+
1394 PHY
CLOAD* R4** AND/OR
USB PORT
C1
10nF
* CLOAD IS USER-SELECTED BASED
ON THE DEVICE REQUIREMENTS
** R3, R4, R7 AND R8 ARE OPTIONAL DISCHARGE
RESISTORS WHEN DEVICES ARE POWERED-OFF
Q1, Q2: ON SEMICONDUCTOR
C4
10nF
R9**
DEVICE #2
+
1394 PHY
CLOAD* R10** AND/OR
USB PORT
18
VID
VLKO
VLKO – VLKH
VON1
t4
FAULT 1 WAVEFORM SHOWN WITH C3
VFAULT1
VIH VIL
t5
VIH
VR1
VGATE1
t1
t2 t3
VON2
t9 t10
FAULT 2 WAVEFORM SHOWN WITHOUT C6
VFAULT2
t7
VR7
t8
t6
t11
VGATE2
1647-1/2/3 F13
Figure 13. VID Power Controller with Fault Status and Retry Sequence
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