Datasheet

ADP8863
Rev. A | Page 3 of 52
SPECIFICATIONS
VIN = 3.6 V, SCL = 2.7 V, SDA = 2.7 V, nINT = open, nRST = 2.7 V, CMP_IN = 0 V, V
D1:D7
= 0.4 V, Capacitor C1 = 1 F, Capacitor C2 = 1 F,
C
OUT
= 1 F, typical values are at T
A
= 25°C and are not guaranteed, minimum and maximum limits are guaranteed from T
A
= −40°C to
+85°C, unless otherwise noted.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
SUPPLY
Input Voltage
Operating Range V
IN
2.5 5.5 V
Start-Up Level V
IN(START)
V
IN
increasing 2.05 2.30 V
Low Level V
IN(STOP)
V
IN
decreasing 1.75 1.97 V
V
IN(START)
Hysteresis V
IN(HYS)
After startup 80 mV
UVLO Noise Filter t
UVLO
10 s
Quiescent Current I
Q
Prior to V
IN(START)
I
Q(START)
V
IN
= V
IN(START)
− 100 mV 10 A
During Standby I
Q(STBY)
V
IN
= 3.6 V, Bit nSTBY = 0, SCL = SDA = 0 V 0.3 1.0 A
After Startup and Switching I
Q(ACTIVE)
V
IN
= 3.6 V, Bit nSTBY = 1, I
OUT
= 0 mA,
gain = 2×
4.5 7.2 mA
OSCILLATOR
Switching Frequency f
SW
0.8 1 1.32 MHz
Duty Cycle D 50 %
OUTPUT CURRENT CONTROL
Maximum Drive Current I
D1:D7(MAX)
V
D1:D7
= 0.4 V
D1 to D7 Bit SCR = 0 in the ISC7 register
T
J
= 25°C 26.2 30 34.1 mA
T
J
= −40°C to +85°C 24.4 34.1 mA
D7 Only (60 mA Setting) I
D7(60 mA)
V
D7
= 0.4 V, Bit SCR = 1 in the ISC7 register
T
J
= 25°C 52.5 60 67 mA
T
J
= −40°C to +85°C 48.8 67 mA
LED Current Source Matching
1
I
MATCH
All Current Sinks I
MATCH7
V
D1:D7
= 0.4 V 2.0 %
D2 to D7 Current Sinks I
MATCH6
V
D2:D7
= 0.4 V 1.5 %
Leakage Current on LED Pins I
D1:D7(LKG)
V
IN
= 5.5 V, V
D1:D7
= 2.5 V, Bit nSTBY = 1 0.5 A
Equivalent Output Resistance R
OUT
Gain = 1× V
IN
= 3.6 V, I
OUT
= 100 mA 0.5 Ω
Gain = 1.5× V
IN
= 3.1 V, I
OUT
= 100 mA 3.0 Ω
Gain = 2× V
IN
= 2.5 V, I
OUT
= 100 mA 3.8 Ω
Regulated Output Voltage V
OUT(REG)
V
IN
= 3 V, gain = 2×, I
OUT
= 10 mA 4.3 4.9 5.5 V
AUTOMATIC GAIN SELECTION
Minimum Voltage
Gain Increases V
HR(UP)
Decrease V
D1:D7
until the gain switches up 162 200 276 mV
Minimum Current Sink Headroom
Voltage
V
HR(MIN)
I
DX
= I
DX(MAX)
× 95% 180 mV
Gain Delay t
GAIN
The delay after gain has changed and
before gain is allowed to change again
100 s
AMBIENT LIGHT SENSING
COMPARATORS
Ambient Light Sensor Current I
ALS
CMP_IN = V
D6
= 2.8 V, Bit CMP2_SEL = 1 0.70 1.08 1.33 mA
DAC Bit Step
Threshold L2 Level I
L2BIT
I
L2BIT
= I
ALS
/250 4.3 A
Threshold L3 Level I
L3BIT
I
L3BIT
= I
ALS
/2000 0.54 A