ADP8861 Analog Devices, ADP8861 Datasheet - Page 18

• Manufacturer Part Number: ADP8861
• Description: Charge Pump, 7-Channel Smart LED Driver with I2C Interface
• Manufacturer: Analog Devices

Specifications of ADP8861

• Vin Range: 2.5 to 5.5V
• Vout (v): 4.3 to 5.5
• Synchronous: No
• Package: 20-Lead LFCSP,20-Lead WLCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: Yes
• Max Iout (ma): 60mA
• Brightness Control: PWM
• Peak Efficiency (%): 89%
• Switching Frequency: 1.32MHz
• Over Volt Protection (v): 5.8V

ADP8861
VOUT < V
VOUT < V
VOUT < V
VOUT > V
VOUT > V
OVP FAULT
OVP FAULT
OVP FAULT
V
V
V
OVP
OVP (HYS)
OVP(HYS)
1
1
(HYS)
OVP
OVP
OVP
OVP
OVP
–
–
–
0
0
0
1
VOUT > V
VOUT > V
VOUT > V
REGULATE
REGULATE
V
V
VOUT TO
VOUT TO
TRY TO
OUT(REG)
TRY TO
OUT(REG)
1
1
1
OUT(REG)
OUT(REG)
1
1
OVP
0
0
0
EXIT STANDBY
VOUT > V
VIN TO VOUT
STARTUP:
STANDBY
STARTUP
CHARGE
0
G = 1.5
G = 2
EXIT
G = 1
OUT(START)
NOTES
1. V
Figure 38. Fault State Machine
1
DMAX
Rev. A | Page 18 of 40
IS THE CALCULATED GAIN DOWN TRANSITION POINT.
EXIT STANDBY
100µs (TYP)
SCP FAULT
VOUT < V
100µs (TYP)
100µs (TYP)
WAIT
WAIT
WAIT
1
OUT(SC)
0
DIE TEMP > TSD
MIN (V
< V
0
MIN (V
MIN (V
0
HR(UP)
< V
> V
D1:D7
0
HR(UP)
DMAX
TSD – TSD
D1:D7
D1:D7
DIE TEMP <
)
)
)
0
(HYS)
1
0
0
TSD FAULT
MIN (V
> V
DMAX
D1:D7
)