MIC2871 Datasheet, PDF (4/24 Pages) Micrel Semiconductor – 1.2A High-Brightness LED Flash Driver with Single-Wire Serial Interface

Micrel, Inc.
MIC2871
Electrical Characteristics⁽⁶⁾
VIN = 3.6V, L = 1µH, COUT = 4.7µF, RFRSET = 20.5kΩ, IOUT = 100mA, TA = 25°C, bold values indicate -40°C ≤ TJ ≤ +125°C,
unless otherwise noted.
Symbol Parameter
Conditions
Min. Typ. Max.
TSD
Overtemperature Shutdown
Threshold
155
Overtemperature Shutdown
Hysteresis
15
TTO
Safety Timeout Shutdown
Default timer setting
1.25
ITO
Safety Timer Current Threshold Default current threshold setting
250
Safety Timer Current Resolution
50
Safety Timer Current-Threshold
Accuracy
25
VLBVD
Low-Battery Voltage Detection
Threshold
Default LBVD threshold setting
3.6
Low-Battery Voltage Detection
Threshold Accuracy
50
VSHORT
LED Short-Circuit Detection
Voltage Threshold
VOUT − VLED
1.7
ITEST
LED Short-Circuit Detection
Test Current
1
2
3
Current Sink Channels
Channel Current Accuracy
VLED
Current Sink Voltage Dropout
FEN1, FEN2 Control Pins
3.5V < VIN <4.2V, ILED = 1A
Boost regulator ON, ILED = 1A
−5
5
160
FEN1/FEN2 Threshold Voltage
FEN1/FEN2 Pull-down Current
FLASH ON
FLASH OFF
FEN1 = FEN2 = 5.5V
1.5
0.4
1
5
Units
°C
°C
s
mA
mA
mA
V
mV
V
mA
%
mV
V
µA
Electrical Characteristics – Single-Wire Interface (Guaranteed by Design)
VIN = 3.6V, L = 1µH, COUT = 4.7µF, IOUT= 100mA, TA = 25°C, bold values indicate -40°C ≤ TJ ≤ +125°C, unless otherwise noted.
Symbol Parameter
Conditions
Min. Typ. Max. Units
LOW-Level Input Voltage
0.4
V
HIGH-Level Input Voltage
1.5
V
DC Pull-Down Current
DC = 5.5V
2.5
5
µA
TON
TOFF
TLAT
TEND
ON Time
OFF Time
Latch Time
END Time
0.1
72
µs
0.1
72
µs
97
324
µs
405
µs
May 29, 2013
4
052913-1.0 (while in progress)
Revision 1.0 (final document)