ADP8861 Analog Devices, ADP8861 Datasheet - Page 24

• 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
Manufacturer and Device ID (MFDVID)—Register 0x00
Multiple device revisions are tracked by the device ID field. This is a read-only register.
Table 9. MFDVID Bit Map
Bit 7
Mode Control Register (MDCR)—Register 0x01
Table 10. MDCR Bit Map
Bit 7
Reserved
Table 11. Bit Descriptions for the MDCR Register
Bit Name
N/A
INT_CFG
nSTBY
DIM_EN
GDWN_DIS
SIS_EN
N/A
BL_EN
0
2
0
Bit No.
7
6
5
4
3
1
Bit 6
Bit 6
INT_CFG
1
Manufacturer ID
Interrupt configuration.
1 = processor interrupt deasserts for 50 μs and reasserts with pending events.
0 = processor interrupt remains asserted if the host tries to clear the interrupt while there is a pending event.
1 = device is in active mode.
0 = device is in standby mode; only the I
DIM_EN is set by the hardware after a dim timeout. The user can also force the backlight into dim mode by
asserting this bit. Dim mode can only be entered if BL_EN is also enabled.
1 = backlight is operating at the dim current level (BL_EN must also be asserted).
0 = backlight is not in dim mode.
1 = the charge pump does not switch down in gain until all LEDs are off. The charge pump switches up in gain as
needed. This feature is useful if the ADP8861 charge pump is used to drive an external load. This feature must be
used when utilizing small fly capacitors (0402 or smaller).
0 = the charge pump automatically switches up and down in gain. This provides optimal efficiency, but is not
suitable for driving loads that are not connected through the ADP8861 diode drivers. Additionally, the charge
pump fly capacitors should be low ESR and sized 0603 or greater.
Synchronous independent sinks enable.
1 = enables all LED current sinks designated as independent sinks. This bit has no effect if any of the SCx_EN bits
in Register 0x10 are set.
0 = disables all LED current sinks designated as independent sinks. This bit has no effect if any of the SCx_EN bits
in Register 0x10 are set.
1 = backlight is enabled (nSTBY must also be asserted).
0 = backlight is disabled.
Description
Reserved.
Reserved.
Bit 5
Bit 5
nSTBY
0
Bit 4
DIM_EN
Bit 4
0
Rev. A | Page 24 of 40
2
C interface is enabled.
Bit 3
GDWN_DIS
Bit 3
0
Bit 2
SIS_EN
Bit 2
0
Device ID
Bit 1
Reserved
Bit 1
0
Bit 0
Bit 0
BL_EN
0