MIC2873 Datasheet, PDF (4/24 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
MIC2873
Electrical Characteristics⁽⁶⁾ (Continued)
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
Condition
Min.
Typ. Max. Units
TSD
Overtemperature
Shutdown Threshold
155
°C
Overtemperature
Shutdown Hysteresis
15
°C
TTO
Safety Timeout Shutdown Default timer setting
ITO
Safety Timer Current
Threshold
Default current threshold setting
1.25
s
250
mA
VLBVD
Low-Battery Voltage
Detection Threshold
Default LBVD threshold setting
3.0
V
Low-Battery Voltage
Detection Threshold
Accuracy
All low-battery voltage detection threshold
settings
50
mV
VSHORT
LED Short-Circuit
Detection Voltage
Threshold
VOUT - VLED
1.55
1.7 1.85
V
ITEST
LED Short-Circuit
Detection Test Current
1.6
2
2.7
mA
Current Sink Channel
VLED
Channel Current Accuracy
Current Sink Voltage
Dropout
VOUT = 4.2V, ILED = 0.20A
VOUT = 4.2V, ILED = 1.0A
Boost mode
−6
6
%
-8
8
250
mV
FEN Control Pin
VFEN
FEN Threshold Voltage
FLASH ON
FLASH OFF
1.3
V
0.6
FEN Pull-down Current
VFEN = 5.5V
1.3
5
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
Condition
Min.
Typ. Max. Units
LOW-Level Input Voltage
VDC
HIGH-Level Input Voltage
0.4
V
1.3
V
DC Pull-Down Current
VDC = 5.5V
2.8
5
µA
TON
TOFF
TLAT
ON Time
OFF Time
Latch Time
0.1
72
µs
0.1
72
µs
97
324
µs
TEND
END Time
405
µs
July 17, 2014
4
Revision 1.0