参数资料
型号: ZL2004EVK1
厂商: Intersil
文件页数: 13/42页
文件大小: 0K
描述: KIT EVAL FOR ZL2004
标准包装: 1
系列: *
ZL2004
Table 7. Resistors fo r Setting Output Voltage
The resistor, R SET , is external to the POLA module. See
Index
0
1
R0 or R1
10 k
11 k
Index
13
14
R0 or R1
34.8 k
38.3 k
POLA Module
2
3
12.1 k
13.3 k
15
16
42.2 k
46.4 k
0.69V
+
4
5
6
7
8
9
10
11
14.7 k
16.2 k
17.8 k
19.6 k
21.5 k
23.7 k
26.1 k
28.7 k
17
18
19
20
21
22
23
24
51.1 k
56.2 k
61.9 k
68.1 k
75 k
82.5 k
90.9 k
100 k
-
1.43k Ω
Rset
10k Ω
V OUT
12
31.6 k
Figure 9. Output Voltage Setting on POLA Module
Example from Figure 8: For V OUT = 1.33 V,
Index1 = 4 x 1.33 V = 5.32;
From Table 7, R1 = 16.2 k ?
Index0 = (100 x 1.33 V) – (25 x 5) = 8;
From Table 7, R0 = 21.5 k?
The output voltage may also be set to any value
between 0.6 V and 3.6 V using the I 2 C interface. See
Application Note AN33 for details.
To stay compatible with this existing method for
adjusting the output voltage and to keep the same
external R SET resistor when using the ZL2004, the
module manufacturer should add a 10 k? 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 ZL2004.
V IN
POLA
MODULE
ZL2004
V0 V1
ZL
PWMH
PWML
Driver
MOSFET
L1
C1
V OUT
1.33V
110 k Ω
10 k Ω
V0 V1
R0
21.5 k Ω
R1
16.2 k Ω
Rset
Figure 8. Output Voltage Resistor Setting Example
POLA Voltage Trim Mode
The output voltage mapping can be changed to match
the voltage setting equations for POLA ( Point of Load
Figure 10. R SET on a POLA Module
Alliance )
and DOSA
( Distributed-power
Open
Standards Alliance ) standard modules.
The standard method for adjusting the output voltage
for a POLA module is defined by the following
equation:
R SET
10 k
13
0 . 69 V
V out 0 . 69 V
1 . 43 k
FN6846.3
February 15, 2011
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