ADP8860 Analog Devices, ADP8860 Datasheet - Page 25

• Manufacturer Part Number: ADP8860
• Description: Charge Pump, 7-Channel Smart LED Driver with I2C Interface
• Manufacturer: Analog Devices

Specifications of ADP8860

• Vin Range: 2.4V to 5.5V
• Vout (v): 4.3 to 5.5
• Synchronous: No
• Package: 20-Lead WLCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: Yes
• Max Iout (ma): 60mA
• Brightness Control: I2C
• Peak Efficiency (%): 89%
• Switching Frequency: 1MHz

•
EXAMPLE CIRCUITS
The ADP8860 has an integrated noise filter on the nRST
pin. Under normal conditions, it is not necessary to filter
the reset line. However, if exposed to an unusually noisy
signal, then it is beneficial to add a small RC filter or
CONTROL
SIGNALS
VDDIO
I
2
nRST
C
nINT
V
IN
R1
R2
R3
R4
1µF
nRST
nINT
SDA
SCL
V
IN
1µF
DL1
A3
A4
D1
E1
C2
E2
D2
VDDIO
VDDIO
VDDIO
VDDIO
DISPLAY BACKLIGHT
D1
D3
GND2
Figure 45. Application Schematic with Keypad Light Control
VIN
GND1
nRST
SDA
SCL
nINT
DL2
A3
E1
C2
E2
D2
D2
E3
D1
DL3
D3
Figure 44. Generic Application Schematic
D3
E4
D2
DL4
E3
D4
D4
D3
E4
Rev. 0 | Page 25 of 52
ADP8860
A4
SUB-DISPLAY BL
D4
V
ACCESSORY
ADP8860
GND1
DL5
OUT
D4
LIGHTS OR
D5
C4
D5
CMP_IN2
DL6
C4
D6/
B4
D6
PHOTOSENSOR
DL7
B4
D1
R5
bypass capacitor on this pin. If the nRST pin is not used, it must
be pulled well above the V
the nRST pin to float.
OPTIONAL
GND2
60mA MAX TOTAL CURRENT
D7
B3
UP TO 10 LEDs (6mA EACH)
D7
B3
CMP_IN
DL8
R6
KEYPAD LIGHT
CMP_IN
VOUT
C3
V
C1+
C1–
C2+
C2–
ALS
C3
PHOTOSENSOR
A2
A1
C1
B1
B2
A2
A1
C1
B1
B2
C1+
C1–
C2+
C2–
DL17
R15
0.1µF
0.1µF
1µF
V
OUT
C1
1µF
C2
1µF
C1
1µF
C2
1µF
1µF
IH(MIN)
PHOTOSENSOR
0.1µF
OPTIONAL
level (see Table 1). Do not allow
PH2
2.8V
PHOTOSENSOR
0.1µF
MAIN
PH1
ADP8860