ISL6336D Datasheet, PDF (19/30 Pages) Intersil Corporation – VR11.1, 6-Phase PWM Controller with Phase Dropping,Droop Disabled and Load Current Monitoring Features

ISL6336D
TABLE 3. VR11 VID 8-BIT (Continued)
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
10000010
10000011
10000100
10000101
10000110
10000111
10001000
10001001
10001010
10001011
10001100
10001101
10001110
10001111
10010000
10010001
10010010
10010011
10010100
10010101
10010110
10010111
10011000
10011001
10011010
10011011
10011100
10011101
10011110
10011111
10100000
10100001
10100010
10100011
10100100
10100101
10100110
10100111
10101000
10101001
VOLTAGE
0.80000
0.79375
0.78750
0.78125
0.77500
0.76875
0.76250
0.75625
0.75000
0.74375
0.73750
0.73125
0.72500
0.71875
0.71250
0.70625
0.70000
0.69375
0.68750
0.68125
0.67500
0.66875
0.66250
0.65625
0.65000
0.64375
0.63750
0.63125
0.62500
0.61875
0.61250
0.60625
0.60000
0.59375
0.58750
0.58125
0.57500
0.56875
0.56250
0.55625
TABLE 3. VR11 VID 8-BIT (Continued)
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
10101010
10101011
10101100
10101101
10101110
10101111
10110000
10110001
10110010
11111110
11111111
VOLTAGE
0.55000
0.54375
0.53750
0.53125
0.52500
0.51875
0.51250
0.50625
0.50000
OFF
OFF
Output-Voltage Offset Programming
The ISL6336D allows the designer to accurately adjust the offset
voltage. When a resistor, R_OFS, is connected between OFS to
VCC, the voltage across it is regulated to 1.6V. This causes a
proportional current (I_OFS) to flow into OFS. If R_OFS is connected
to ground, the voltage across it is regulated to 0.4V, and I_OFS
flows out of OFS. A resistor between DAC and REF, R_REF, is
selected so that the product (I_OFS x R_OFS) is equal to the desired
offset voltage. These functions are shown in Figure 12.
FB
DYNAMIC
VID D/A
DAC
R_REF
E/A
REF
C_REF
VCC
OR
GND
-
1.6V ₊
+
0.4V _-
R_OFS
ISL6336D ^OFS
VCC GND
FIGURE 12. OUTPUT VOLTAGE OFFSET PROGRAMMING
Once the desired output offset voltage has been determined, use
Equations 10 and 11 to calculate R_OFS.
For Positive Offset (connect R_OFS to VCC):
R_OFS
=
1_----._--6_----_-----R_{-----R----E----F-}
V_OFFSET
(EQ. 10)
For Negative Offset (connect R_OFS to GND):
R_OFS
=
0_----._--4_----_-----R_{-----R----E----F-}
V_OFFSET
(EQ. 11)
Submit Document Feedback ₁₉
FN8320.0
October 6, 2014