MIC2874 Datasheet, PDF (4/22 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
MIC2874
Electrical Characteristics⁽⁶⁾ (Continued)
V_IN = 3.6V; L = 0.47µH; C_OUT = 4.7µF, I_OUT = 100mA, T_A = 25°C, bold values indicate –40°C≤ T_J ≤ +125°C, unless otherwise noted.
Symbol Parameter
Condition
Min.
Typ.
Max.
Units
T_SD
Overtemperature
Shutdown Threshold
155
°C
Overtemperature
Shutdown Hysteresis
15
°C
T_TO
Safety Timeout Shutdown Default timer setting
I_TO
Safety Timer Current
Threshold
Default current threshold setting
1.25
s
250
mA
V_LBVD
Low-Battery Voltage
Detection Threshold
Low-Battery Voltage
Detection Threshold
Accuracy
Default LBVD threshold setting
All low-battery voltage detection threshold
settings
3.0
V
50
mV
V_SHORT
LED Short-Circuit
Detection Voltage
Threshold
V_OUT - V_LED
1.55
1.7
1.85
V
I_TEST
LED Short-Circuit
Detection Test Current
Current Sink Channel
1.6
2
2.7
mA
Channel Current Accuracy
V_LED
Current Sink Voltage
Dropout
FEN Control Pin
V_OUT = 4.2V, I_LED = 0.20A
V_OUT = 4.2V, I_LED = 1.0A
Boost mode
−6
6
%
-8
8
250
mV
V_FEN
FEN Threshold Voltage
FLASH ON
FLASH OFF
1.3
V
0.6
FEN Pull-down Current
V_FEN = 5.5V
1.3
5
µA
Electrical Characteristics ̶ Single-Wire Interface (Guaranteed by Design)
V_IN = 3.6V; L = 0.47µH; C_OUT = 4.7µF, I_OUT = 100mA, T_A = 25°C, bold values indicate –40°C≤ T_J ≤ +125°C, unless otherwise noted.
Symbol Parameter
Condition
Min.
Typ.
Max.
Units
LOW-Level Input Voltage
V_DC
HIGH-Level Input Voltage
0.4
V
1.3
V
DC Pull-Down Current
V_DC = 5.5V
2.8
5
µA
T_ON
ON Time
0.1
72
µs
T_OFF
OFF Time
0.1
72
µs
T_LAT
Latch Time
97
324
µs
T_END
END Time
405
µs
August 26, 2014
4
Revision 1.0