參數(shù)資料
型號(hào)： P95020ZLLG
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA124
封裝： LLGA-124
文件頁數(shù)： 122/137頁
文件大?。?/td> 3533K
代理商： P95020ZLLG
P95020 / Preliminary Datasheet
Revision 0.7.10
85
2010 Integrated Device Technology, Inc.
LED_Boost EFFICIENCY vs. VIN
with two strings of 10 LEDs
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
3
3.5
4
4.5
5
5.5
VIN (V)
E
FF
IC
IE
N
C
Y
(%
)
IOUT = 40mA
IOUT = 20mA
Figure 23
– LED Boost Efficiency vs VIN (two srings of 10 LEDs)
9.3
LED_BOOST - REGISTER SETTINGS
Output Current Register and Control Register control and monitor the LED_BOOST Driver. The controller can be
programmed by writing 8-bit control words to these registers.
The Base addresses are defined in Table 3 – Register Address Global Mapping on page 20.
9.3.1
LED_BOOST - Output Current Register
The Output Current Register contains the Enable Bit and the Sink Current settings.
IC Address = Page-0: 134(0x86), C Address = 0xA086
Bit
Bit Name
Def.
Set.
User
Type
Value
Description / Comments
[4:0]
LED_BOOST_IOUT
00000b
RW
Full Scale = 0.78 mA
Half Scale = 0.39 mA
Sink Current (See Table 22)
If LED_BOOST_SCALE (Bit 6) = 1, use Full Scale values:
LED Current = IOUT * 0.78 mA + 0.78 mA
If LED_BOOST_SCALE (Bit 6) = 0, use Half Scale values:
LED Current = IOUT * 0.39 mA + 0.39 mA
5
RESERVED
0b
RW
RESERVED
6
LED_BOOST_SCALE
1b
RW
1 = Full Current Scale
0 = Half Current Scale
Current Scale
7
LED_BOOST_ENABLE
0b
RW
1 = Enable
0 = Disable
Enable Output Voltage
Table 22
– Register 0xA086 (0x86) IOUT Current Settings for Bits [4:0], Half Scale and Full Scale
Bit
Setting
Current (mA)
Bit
Setting
Current (mA)
Bit
Setting
Current (mA)
Bit
Setting
Current (mA)
Bit
Setting
Current (mA)
Half
Full
Half
Full
Half
Full
Half
Full
Half
Full
00000
0.39
0.78
00111
3.13
6.25
01110
5.86
11.72
10101
8.59
17.19
11100
11.33
22.66
00001
0.78
1.56
01000
3.52
7.03
01111
6.25
12.50
10110
8.98
17.97
11101
11.72
23.44
00010
1.17
2.34
01001
3.91
7.81
10000
6.64
13.28
10111
9.38
18.75
11110
12.11
24.22
00011
1.56
3.13
01010
4.30
8.59
10001
7.03
14.06
11000
9.77
19.53
11111
12.50
25.00
00100
1.95
3.91
01011
4.69
9.38
10010
7.42
14.84
11001
10.16
20.31
00101
2.34
4.69
01100
5.08
10.16
10011
7.81
15.63
11010
10.55
21.09
00110
2.73
5.47
01101
5.47
10.94
10100
8.20
16.41
11011
10.94
21.88
Note
– Current Output contains an initial offset of 0.39 mA for Half Scale or 0.78 mA for Full Scale.
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