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| 型号： | AL8807W5-7 |
| 厂商： | Diodes Inc |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR DCDC BUCK SOT25 |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 6 V ~ 36 V |
| 输出电压： | 36V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-25 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | AL8807W5-7DIDKR |
AL8807
Pin Descriptions
Pin Name
Pin Number
SOT25 MSOP-8EP
Function
SW
GND
1 5, 6 Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.
2 2, 3 GND Pin
Dimming and On/Off Control Input.
?
Leave floating for normal operation.
(V CTRL = V REF = 2.5V giving nominal average output current I OUTnom = 0.1/R S )
CTRL
3 4
?
?
?
Drive to voltage below 0.4V to turn off output current
Drive with DC voltage (0.5V < V CTRL < 2.5V) to adjust output current from 20% to 100% of I OUTnom
A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output
current to be adjusted below the level set by the resistor connected to SET input pin.
SET
4 1 Set Nominal Output Current Pin. Configure the output current of the device.
V IN
5 8
Input Supply Pin. Must be locally decoupled to GND with > 2.2μF X7R ceramic capacitor – see applications
section for more information.
EP
N/C
—
—
EP
7
Exposed pad/TAB connect to GND and thermal mass for enhanced thermal impedance. Should not be
used as electrical ground conduction path.
No Connection
Absolute Maximum Ratings (@T A = +25°C, unless otherwise specified.)
Symbol
ESD HBM
ESD MM
V IN
V SW
V CTRL
Parameter
Human Body Model ESD Protection
Machine Model ESD Protection
Continuous V IN Pin Voltage Relative to GND
SW Voltage Relative to GND
CTRL Pin Input Voltage
Ratings
2.5
200
-0.3 to +40
-0.3 to +40
-0.3 to +6
Unit
kV
V
V
V
V
I SW-RMS
I SW-PK
T J
T LEAD
T ST
DC or RMS Switch Current
Peak Switch Current (<10%)
Junction Temperature
Lead Temperature Soldering
Storage Temperature Range
SOT25
MSOP-8EP
1.25
1.6
2.5
150
300
-65 to +150
A
A
°C
°C
°C
Caution:
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.
Recommended Operating Conditions (@T A = +25°C, unless otherwise specified.)
Symbol
V IN
V CTRLH
V CTRLDC
V CTRLL
f SW
Parameter
Operating Input Voltage Relative to GND
Voltage High for PWM Dimming Relative to GND
Voltage Range for 20% to 100% DC Dimming Relative to GND
Voltage Low for PWM Dimming Relative to GND
Maximum Switching Frequency
Min
6.0
2.6
0.5
0
Max
36
5.5
2.5
0.4
1
Unit
V
V
V
V
MHz
I SW
T J
Continuous Switch Current
Junction Temperature Range
SOT25
MSOP-8EP
-40
1
1.3
+125
A
°C
AL8807
Document number: DS35281 Rev. 5 - 2
2 of 20
www.diodes.com
March 2013
? Diodes Incorporated
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