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ADP8861ACPZ-RL 数据表(PDF) 11 Page - Analog Devices

部件名 ADP8861ACPZ-RL
功能描述  Charge Pump, 7-Channel Smart LED Driver with I2C Interface
Download  40 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP8861ACPZ-RL 数据表(HTML) 11 Page - Analog Devices

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ADP8861
Rev. 0 | Page 11 of 40
THEORY OF OPERATION
The ADP8861 provides a powerful charge pump driver with
programmable LED control. Up to seven LEDs can be indepen-
dently driven up to 30 mA (typical) each. The seventh LED can
also be driven to 60 mA (typical). All LEDs can be individually
programmed or combined into a group to operate backlight
LEDs. A full suite of safety features, including short-circuit,
overvoltage, and overtemperature protection with input-to-
output isolation, allows for a robust and safe design. The
integrated soft start limits inrush currents at startup, restart
attempts, and gain transitions.
I2C
LOGIC
C1
1µF
C2
1µF
GND2
nINT
COUT
VOUT
CIN
VIN
VIN
VREFS
IREFS
STNDBY
EN
VIN
VBAT
C1+
SDA
SCL
VDDIO
STANDBY
SWITCH CONTROL
CURRENT SINK CONTROL
C1–
C2+
C2–
nRST
NOISE FILTER
50µs
RESET
D2
D3
D4
D5
D6
D7
D1
ID1
ID2
ID3
ID4
ID5
ID6
ID7
VIN
GND1
CLK
UVLO
SOFT
START
ISS
CHARGE
PUMP
LOGIC
GAIN
SELECT
LOGIC
CHARGE
PUMP
(1×, 1.5×, 2×)
Figure 24. Detailed Block Diagram


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