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MIC2843A Datasheet, PDF (3/13 Pages) Micrel Semiconductor – High Efficiency 6 Channel Linear WLED Driver with DAM™ and Ultra Fast PWM™ Control
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Micrel Inc.
MIC2843A
Absolute Maximum Ratings(1)
Main Input Voltage (VIN) .................................. –0.3V to +6V
Enable Input Voltage (VEND) ............................ –0.3V to +6V
LED Driver Voltage (VD1-D6) ............................ –0.3V to +6V
Power Dissipation .....................................Internally Limited
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating(3)................................................. ESD Sensitive
Operating Ratings(2)
Supply Voltage (VIN)..................................... +3.0V to +5.5V
Enable Input Voltage (VEND) .................................. 0V to VIN
LED Driver Voltage (VD1-D6) ................................... 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
2mm x 2mm Thin MLF-10L (θJA) .......................90°C/W
Electrical Characteristics
VIN = VEND = 3.8V, RSET = 20.5kΩ; VD1-D6 = 0.6V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ 125°C; unless noted.
Parameter
Current Accuracy(4)
Matching(5)
Conditions
Min
Typ
Max Units
1.5
%
1.5
3.6
%
Drop-out
Where ILED = 90% of LED current seen at
VDROPNOM = 0.6V, 100% brightness level
40
80
mV
Ground/Supply Bias Current
IOUT = 20mA
1.4
1.8
mA
Shutdown Current
VEND = 0V
0.01
1
µA
PWM Dimming
Enable Input Voltage (VEND)
Logic Low
0.2
V
Logic High
1.2
V
Enable Input Current
VIH > 1.2V
0.01
1
µA
Current Source Delay
(50% levels)
Shutdown to on
Standby to on
On to Standby
40
80
µs
2
µs
0.3
µs
Current Source Transient Time
(10%-90%)
TRISE
TFALL
1
µs
0.3
µs
Stand-by to Shutdown Time
VEND = 0V
10
24
40
ms
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. As determined by average current of all channels in use and all channels loaded.
5. The current through each LED meets the stated limits from the average current of all LEDs.
June 2009
3
M9999-062909-C
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