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ADP8861ACPZ-RL 数据表(PDF) 3 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) 3 Page - Analog Devices

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ADP8861
Rev. 0 | Page 3 of 40
SPECIFICATIONS
VIN = 3.6 V, SCL = 2.7 V, SDA = 2.7 V, nINT = open, nRST = 2.7 V, VD1:D7 = 0.4 V, Capacitor C1 = 1 μF, Capacitor C2 = 1 μF, COUT = 1 μF,
typical values are at TA = 25°C and are not guaranteed, minimum and maximum limits are guaranteed from TA = −40°C to +85°C, unless
otherwise noted.
Table 1.
Parameter
Symbol
Test Conditions/Comments
Min
Typ
Max
Unit
SUPPLY
Input Voltage
Operating Range
VIN
2.5
5.5
V
Start-Up Level
VIN(START)
VIN increasing
2.05
2.30
V
Low Level
VIN(STOP)
VIN decreasing
1.75
1.97
V
VIN(START) Hysteresis
VIN(HYS)
After startup
80
mV
UVLO Noise Filter
tUVLO
10
μs
Quiescent Current
IQ
Prior to VIN(START)
IQ(START)
VIN = VIN(START) − 100 mV
10
μA
During Standby
IQ(STBY)
VIN = 3.6 V, Bit nSTBY = 0, SCL = SDA = 0 V
0.3
1.0
μA
After Startup and Switching
IQ(ACTIVE)
VIN = 3.6 V, Bit nSTBY = 1, IOUT = 0 mA, gain = 2×
4.5
7.2
mA
OSCILLATOR
Charge pump gain = 2×
Switching Frequency
fSW
0.8
1
1.32
MHz
Duty Cycle
D
50
%
OUTPUT CURRENT CONTROL
Maximum Drive Current
ID1:D7(MAX)
VD1:D7 = 0.4 V
Diode1 to Diode 7
Bit SCR = 0 in the ISC7 register
TJ = 25°C
26.2
30
34.1
mA
TJ = −40°C to +85°C
24.4
34.1
mA
Diode 7 Only (60 mA Setting)
ID7(60 mA)
VD7 = 0.4 V, Bit SCR = 1 in the ISC7 register
TJ = 25°C
52.5
60
67
mA
TJ = −40°C to +85°C
48.8
67
mA
LED Current Source Matching1
IMATCH
All Current Sinks
IMATCH7
VD1:D7 = 0.4 V
2.0
%
Diode 2 to Diode 7 Current
Sinks
IMATCH6
VD2:D7 = 0.4 V
1.5
%
Leakage Current on LED Pins
ID1:D7(LKG)
VIN = 5.5 V, VD1:D7 = 2.5 V, Bit nSTBY = 1
0.5
μA
Equivalent Output Resistance
ROUT
Gain = 1×
VIN = 3.6 V, IOUT = 100 mA
0.5
Ω
Gain = 1.5×
VIN = 3.1 V, IOUT = 100 mA
3.0
Ω
Gain = 2×
VIN = 2.5 V, IOUT = 100 mA
3.8
Ω
Regulated Output Voltage
VOUT(REG)
VIN = 3 V, gain = 2×, IOUT = 10 mA
4.3
4.9
5.5
V
AUTOMATIC GAIN SELECTION
Minimum Voltage
Gain Increases
VHR(UP)
Decrease VD1:D7 until the gain switches up
162
200
276
mV
Minimum Current Sink Headroom
Voltage
VHR(MIN)
IDX = IDX(MAX) × 95%
180
mV
Gain Delay
tGAIN
The delay after gain has changed and before
gain is allowed to change again
100
μs
FAULT PROTECTION
Start-Up Charging Current Source
ISS
VIN = 3.6 V, VOUT = 0.8 × VIN
2.5
3.75
5.5
mA
Output Voltage Threshold
VOUT
Exit Soft Start
VOUT(START)
VOUT rising
0.92 × VIN
V
Short-Circuit Protection
VOUT(SC)
VOUT falling
0.55 × VIN
V


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