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参数资料
| 型号： | MIC2846A-PPYMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 4/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT 14TMLF |
| 标准包装： | 1 |
| 拓扑： | 线性（LDO） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 电源电压： | 3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-UFQFN 裸露焊盘，14-TMLF? |
| 供应商设备封装： | 14-TMLF?（2.5x2.5） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1082 (CN2011-ZH PDF) |
| 其它名称： | 576-3480-6 |
Micrel Inc.
Absolute Maximum Ratings (1)
Main Input Voltage (V IN ) ................................... -0.3V to +6V
Enable Input Voltage (V DC , V EN1 , V EN2 ) ............ -0.3V to +6V
LED Driver Voltage (V D1-D6 ).............................. -0.3V to +6V
Power Dissipation ................................. Internally Limited (3)
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (T s ) ..........................-65°C to +150°C
ESD Rating (4) ................................................. ESD Sensitive
MIC2846A
Operating Ratings (2)
Supply Voltage (V IN ).................................. +3.0V to +5.5V
Enable Input Voltage (V DC , V EN1 , V EN2 ) .............. 0V to V IN
LED Driver Voltage (V D1-6 ) ................................. 0V to V IN
Junction Temperature (T J ) ..................... –40°C to +125°C
Junction Thermal Resistance
2.5mm x 2.5mm Thin MLF-14L ( θ JA ) ..............89°C/W
Electrical Characteristics
Linear WLED Drivers
V IN = V DC = 3.8V, V EN1 = V EN2 = 0V, R SET = 20.5k ? ; V D1-D6 = 0.6V; T J = 25 ° C, bold values indicate –40 ° C ≤ T J ≤ 125 ° C;
unless noted.
Parameter
Conditions
Min
Typ
Max
Units
Matching
Current Accuracy (5)
(6)
1.5
1.5
%
%
Drop-out
Ground/Supply Bias Current
Shutdown Current
(current source leakage)
Where I LED = 90% of LED current seen at
V DROPNOM = 0.6V, 100% brightness level
I LED = 20mA
V DC = 0V for more than 1260μs
40
1.4
0.01
80
1.8
1
mV
mA
μA
Digital Dimming
V DC Input Voltage (V DC )
V DC Enable Input Current
t SHUTDOWN
t MODE_UP
t MODE_DOWN
t PROG_HIGH , t PROG_LOW
t DELAY
t PROG_SETUP
t START_UP
Logic Low
Logic High
V DC = 1.2V
Time DC pin is low to shutdown the device
Time DC pin is low to change to Count Up Mode
Time DC pin is low to change to Count Down Mode
Time for valid edge count; Ignored if outside limit range
Time DC pin must remain high before a mode change
can occur
First down edge must occur in this window during
presetting brightness
Delay time starting when DC is first pulled high until
LEDs start up
1.2
1260
100
420
2
100
5
140
0.01
0.2
1
160
500
32
75
V
V
μA
μs
μs
μs
μs
μs
μs
μs
LDOs
V IN = V EN1 = V EN2 = 3.8V, V DC = 0V; C OUT1 = C OUT2 = 1 μ F, I OUT1 = I OUT1 = 100 μ A; T J = 25°C, bold values indicate –40 ° C ≤
T J ≤ 125 ° C; unless noted.
Dropout Voltage
Parameter
Output Voltage Accuracy
V IN Line Regulation
Load Regulation
(7)
Ground Pin Current
Ground Pin Current in Shutdown
Conditions
Variation from nominal V OUT
I OUT = 100 μ A to 150mA
V OUT >= 3.0V; I OUT = 150mA
V EN = 0V
Min
-2
-3
Typ
0.02
7
150
35
0.05
Max
+2
+3
0.3
330
70
1.0
Units
%
%
%/V
mV
mV
μA
μA
April 2010
4
M9999-041210-D
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