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參數(shù)資料
| 型號： | MAX786 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual-Output Power-Supply Controller for Notebook Computers(具有25μA關(guān)斷的,3.3V/5V筆記本型電腦電源) |
| 中文描述： | 雙輸出電源控制器，用于筆記本電腦 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大?。?/td> | 301K |
| 代理商： | MAX786 |
M
Dual-Output Power-S upply
Controller for Notebook Computers
16
______________________________________________________________________________________
Other ways to shut down the MAX786 are suggested
in the applications section of the MAX782/MAX783
data sheet.
__________Applic ations Information
Low-V oltage (6-Cell) Operation
The standard application circuit can be configured to
accept input voltages from 5.5V to 12V by changing
the oscillator frequency to 200kHz and increasing the
+5V filter capacitor to 660μF. This allows stable opera-
tion at 5V loads up to 2A (the 3.3V side requires no
changes and still delivers 3A).
MAX786
V+
VL
23
22
V+
C1
33
μ
F
35V
R9
1k
R10
OPEN
6
D2
25
18
16
17
19
15
10
11
7
8
SS3 GND PGND
2
C9
0.01
μ
F
BST3
DH3
LX3
DL3
CS3
FB3
ON3
ON5
SHDN
D1
BST5
DH5
LX5
DL5
CS5
FB5
REF
SYNC
Q2
Q1
14
20
3.3V
OUT
C7
150
μ
F
10V
C12
150
μ
F
10V
L1
10
μ
H
D1
1N5819
SHDN
D1
SYNC
Q1
Q2
C3
1
μ
F
20V
D3
1N5819
L2
10
μ
H
R2
0.025
5V
OUT
C6
330
μ
F
10V
C2
4.7
μ
F
C10
33
μ
F
35V
D2
R1
0.025
N1
N3
D2
R6
1M
R5
1M
R8
1M
R7
1M
R4
1M
9
27
26
24
1
28
3
13
12
4
5
SW1C
SW1A
SW1B
R3
1M
21
VH
D2
SS5
VREF (3.3V)
SW1D
N2
N4
C4
0.1
μ
F
N1 – N4 = Si9410DY
D2 = BAW56L OR TWO1N4148s
VL (5V)
C8
0.01
μ
F
ON3
ON5
C5
0.1
μ
F
Figure 6. MAX786 EV Kit Schematic
Table 3. EV Kit Power-Supply Controls (SW1)
SWITCH NAME
FUNCTION
ON
OFF
SETTING SETTING
1
SHDN
Enable shutdown
mode
Enable 3.3V
power supply
Enable 5.0V
power supply
Operate
Shutdown
2
ON3
3.3V ON
3.3V OFF
3
ON5
5V ON
5V OFF
4
SYNC
Oscillator
200kHz
300kHz
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