参数资料
型号: ZL6100EVAL1Z
厂商: Intersil
文件页数: 12/34页
文件大小: 0K
描述: EVAL BOARD USB ZL6100
标准包装: 1
系列: *
ZL6100
TABLE 3. RESISTORS FOR SETTING OUTPUT
VOLTAGE
POLA VOLTAGE TRIM MODE
The output voltage mapping can be changed to match the
INDEX
0
1
R0 OR R1
(k Ω )
10
11
INDEX
13
14
R0 OR R1
(k Ω )
34.8
38.3
voltage setting equations for POLA and DOSA standard
modules.
The standard method for adjusting the output voltage for a
POLA module is defined by Equation 3:
R SET = 10 k Ω × ---------------------------------- – 1.43 k Ω
2
3
12.1
13.3
15
16
42.2
46.4
0.69 V
V OUT – 0.69 V
(EQ. 3)
4
5
6
7
8
9
10
11
12
14.7
16.2
17.8
19.6
21.5
23.7
26.1
28.7
31.6
17
18
19
20
21
22
23
24
51.1
56.2
61.9
68.1
75
82.5
90.9
100
The resistor, R SET , is external to the POLA module
(see Figure 9).
To stay compatible with this existing method for adjusting the
output voltage, the module manufacturer should add a 10k Ω
resistor on the module as shown in Figure 10. Now, the
same R SET used for an analog POLA module will provide the
same output voltage when using a digital POLA module
based on the ZL6100.
POLA MODULE
0.69V
+
Example from Figure 8: For V OUT = 1.33V,
Index1 = 4 x 1.33V = 5.32;
From Table 3, R1 = 16.2k
Index0 = (100 x 1.33V) – (25 x 5) = 8;
From Table 3, R0 = 21.5k
The output voltage can be determined from the R0 (Index0)
and R1 (Index1) values using Equation 2:
R SET
-
Ω
1.43kO
Ω
10kO
V OUT
V OUT = --------------------------------------------------------
Index 0 + ( 25 xIndex 1 )
100
(EQ. 2)
FIGURE 9. OUTPUT VOLTAGE SETTING ON POLA MODULE
SMBUS MODE
The output voltage may be set to any value between 0.6V
and 5.0V using a PMBus command over the I 2 C/SMBus
interface. See Application Note AN2033 for details.
POLA
MODULE
ZL6100
GH
V IN
Ω
110kO
V0 V1
Ω
10kO
ZL
SW
V OUT
V0
V1
GL
1.33V
R SET
R0
21.5 kO Ω
R1
O
16.2 k Ω
FIGURE 10. R SET ON A POLA MODULE
The POLA mode is activated through pin-strap by
FIGURE 8. OUTPUT VOLTAGE RESISTOR SETTING EXAMPLE
12
connecting a 110k resistor on V0 to SGND. The V1 pin is
then used to adjust the output voltage as shown in Table 4
.
FN6876.3
August 29, 2012
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