MIC2843 Datasheet, PDF (3/15 Pages) Micrel Semiconductor – High-Efficiency 6-Channel Linear WLED Driver with Ultra-Fast PWM™ Control

Micrel Inc.
MIC2843
Absolute Maximum Ratings⁽¹⁾
Main Input Voltage (V_IN) .................................. −0.3V to +6V
Enable Input Voltage (V_END) ............................ −0.3V to +6V
Current Source Voltage (V_D1-D6) ..................... −0.3V to +6V
Power Dissipation .....................................Internally Limited
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (T_s) .........................−65°C to +150°C
ESD Rating⁽³⁾................................................. ESD Sensitive
Operating Ratings⁽²⁾
Supply Voltage (V_IN)..................................... +3.0V to +5.5V
Enable Input Voltage (V_END) .................................. 0V to V_IN
Current Source Voltage (V_D1-D6) ............................ 0V to V_IN
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
2mm x 2mm Thin MLF^®-10L (θ_JA)......................90°C/W
Electrical Characteristics
WLED Linear Drivers
V_IN = V_END = 3.8V, R_SET = 20.5kΩ; V_D1-D6 = 0.6V; T_J = 25°C, bold values indicate –40°C ≤ T_J ≤ 125°C; unless noted.
Parameter
Current Accuracy⁽⁴⁾
Matching⁽⁵⁾
Conditions
V_DROPNOM = 0.6V
V_DROPNOM = 0.6V
Min.
Typ.
1.5
3
Drop-out
Where I_LED = 90% of LED current seen at
V_DROPNOM = 0.6V, 100% brightness level
40
Ground/Supply Bias Current
I_OUT = 20mA
1.4
Shutdown Current
(Current Source Leakage)
V_END = 0V
0.01
PWM Dimming
Logic Low
Enable Input Voltage (V_END)
Logic High
1.2
Enable Input Current
V_IH > 1.2V
0.01
Shutdown to On
40
Current Source Delay
Standby to On
0.5
(50% levels)
On to Standby
1
R_SET = 20.5k
Current Source Transient Time TRISE
1
(10% − 90%)
T_FALL
0.3
Standby to Shutdown Time
V_END = 0V
10
20
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.
Max.
5.5
100
1
0.2
1
60
40
Units
%
%
mV
mA
µA
V
V
µA
µs
µs
µs
µs
µs
ms
November 2010
3
M9999-110810-B