ADP5520 Analog Devices, ADP5520 Datasheet - Page 37

• Manufacturer Part Number: ADP5520
• Description: Backlight Driver with I/O Expander
• Manufacturer: Analog Devices

Specifications of ADP5520

• Vin Range: 2.7 to 5.5V
• Vout (v): 24 to 27
• Synchronous: No
• Package: 24-Lead LFCSP
• Led Configuration: Serial
• Topology: Inductive
• I2c Support: Yes
• Max Iout (ma): 30mA
• Brightness Control: I2C
• Switching Frequency: 1MHz
• Over Volt Protection (v): 24V

I/O RAIL
I/O RAIL
VBAT
VBAT
1µF
1µF
21
16
15
21
16
15
1
5
4
3
1
5
4
3
Figure 57. I/O Configuration Example 5
Figure 58. I/O Configuration Example 6
PGND
VBAT
VDDIO
SCL
SDA
nINT
nRST
PGND
VBAT
VDDIO
SCL
SDA
nINT
nRST
4.7µH
4.7µH
R3
13
R3
13
R2
6
SW
SW
R2
2
6
2
1µF
1µF
R1
7
R1
7
R0
BST
BST
8
R0
22
22
8
ADP5520
ADP5520
C0
M
A
E
9
I
C0
9
C1
10
B
F
J
N
C1
10
C2
11
C2
11
C3
12
BL_SNK
BL_SNK
C3
CAP_OUT
CAP_OUT
12
CMP_IN
CMP_IN
23
23
VBAT
ILED
VBAT
GND
GND
GND
ILED
GND
GND
GND
14
14
20
19
18
24
17
20
19
18
24
17
1µF
100nF
1µF
100nF
VBAT
VBAT
Rev. A | Page 37 of 40
I/O RAIL
I/O RAIL
VBAT
VBAT
1µF
1µF
21
16
15
21
16
15
1
5
4
3
1
5
4
3
Figure 59. I/O Configuration Example 7
Figure 60. I/O Configuration Example 8
PGND
VBAT
VDDIO
SCL
SDA
nINT
nRST
PGND
VBAT
VDDIO
SCL
SDA
nINT
nRST
4.7µH
4.7µH
R2
R3
13
6
R1
R2
SW
SW
7
6
2
2
1µF
1µF
R1
R0
7
8
C0
R0
BST
BST
9
8
22
22
ADP5520
ADP5520
C1
C0
10
9
C1
C2
11
10
I/O PORT UNUSED
C2
11
R3
13
C3
12
BL_SNK
BL_SNK
C3
CAP_OUT
CAP_OUT
12
CMP_IN
CMP_IN
23
23
VBAT
ILED
ILED
ADP5520
GND
GND
GND
GND
GND
GND
14
14
20
19
18
24
17
20
19
18
24
17
1µF
100nF
1µF
100nF
VBAT
VBAT