ADP8863 Analog Devices, ADP8863 Datasheet - Page 27

• Manufacturer Part Number: ADP8863
• Description: Charge Pump, 7-Channel Fun Lighting LED Driver
• Manufacturer: Analog Devices

Specifications of ADP8863

• 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: I2C
• Peak Efficiency (%): 89%
• Switching Frequency: 1.32MHz
• Over Volt Protection (v): 5V

Manufacturer and Device ID (MFDVID)—Register 0x00
This is a read-only register.
Table 10. MFDVID Bit Map
Bit 7
Mode Control Register (MDCR)—Register 0x01
Table 11. MDCR Bit Map
Bit 7
Reserved
Table 12. Bit Descriptions for the MDCR Register
Bit Name
N/A
INT_CFG
nSTBY
DIM_EN
GDWN_DIS
SIS_EN
CMP_AUTOEN
BL_EN
0
Bit No.
7
6
5
4
3
2
1
0
Bit 6
Bit 6
INT_CFG
0
Manufacturer ID
Description
Reserved.
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 may 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.
Gain down disable bit. Setting this bit does not allow the charge pump to switch to lower gains.
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 ADP8863 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 ADP8863 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. All of the ISC enable bits must be cleared;
if any of the SCx_EN bits in Register 0x10 are set, this bit has no effect.
0 = disables all sinks designated as independent sinks. All of the ISC enable bits must be cleared; if any of the
SCx_EN bits in Register 0x10 are set, this bit has no effect.
1 = backlight automatically responds to the comparator outputs (L2_OUT and L3_OUT). L2_EN and/or L3_EN
must be set for this to function. BLV values in Register 0x04 are overridden.
0 = backlight does not respond automatically to comparator level changes. The user can manually select
backlight operating levels using Bit BLV in Register 0x04.
1 = backlight is enabled (nSTBY must also be asserted).
0 = backlight is disabled.
Bit 5
Bit 5
nSTBY
1
Bit 4
DIM_EN
Bit 4
0
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2
Bit 3
GDWN_DIS
C interface is enabled.
Bit 3
1
Bit 2
SIS_EN
Bit 2
0
Device ID
Bit 1
CMP_AUTOEN
Bit 1
1
Bit 0
ADP8863
Bit 0
BL_EN
0