MIC4801 Datasheet, PDF (3/12 Pages) Micrel Semiconductor – High Efficiency 600mA Single Channel Linear WLED Driver with Ultra Fast PWM™ Control

Micrel Inc.
MIC4801
Absolute Maximum Ratings⁽¹⁾
Main Input Voltage (V_IN) .................................. –0.3V to +6V
Enable Input Voltage (V_EN).............................. –0.3V to +6V
LED Driver Voltage (V_D1) ................................ –0.3V to +6V
Power Dissipation .....................................Internally Limited
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (T_s) .........................–65°C to +150°C
Operating Ratings⁽²⁾
Supply Voltage (V_IN)..................................... +3.0V to +5.5V
Enable Input Voltage (V_EN) .................................... 0V to V_IN
LED Driver Voltage (V_D1) ....................................... 0V to V_IN
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
SOIC-8L (θ_JA)..................................................98.9°C/W
Electrical Characteristics
V_IN = V_EN = 5V, R_SET = 12.1kΩ; V_D1 = 1.2V; T_J = 25°C, bold values indicate –40°C ≤ T_J ≤ 125°C; unless noted.
Parameter
Current Accuracy⁽³⁾
Conditions
Min
Typ
Max
374
416
458
Drop-out
Where I_LED = 90% of LED current seen at
V_DROPNOM = 1.2V, 100% brightness level
130
250
Ground/Supply Bias Current
I_OUT = 416mA
2.2
2.9
Shutdown Current
V_EN = 0V
0.01
1
PWM Dimming
Enable Input Voltage (V_EN)
Logic Low
0.2
Logic High
1.2
Enable Input Current
V_IH > 1.2V
0.01
1
Current Source Delay
(50% levels)
Shutdown to on
Standby to on
On to Standby
40
60
2
0.3
Current Source Transient Time T_RISE
1
(10%-90%)
T_FALL
0.3
Stand-by to Shutdown Time
V_EN = 0V
10
20
40
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. As determined by average current based on R_SET resistance.
Units
mA
mV
mA
µA
V
V
µA
µs
µs
µs
µs
µs
ms
January 2011
3
M9999-011811-A