首页 > 器件类别 > 开发板/开发套件/开发工具

AL8806EV4

BOARD LED DRIVER 1.5A 30V

器件类别:开发板/开发套件/开发工具   

厂商名称:Diodes

厂商官网:http://www.diodes.com/

器件标准:

下载文档
器件参数
参数名称
属性值
电流 - 输出/通道
1.5A
输出和类型
1,非隔离
特性
可调光
电压 - 输入
9 V ~ 30 V
所含物品
使用的 IC/零件
AL8806
文档预览
AL8806
HIGH EFFICIENCY 36V 1.5A BUCK LED DRIVER
Description
The AL8806 is a step-down DC/DC converter designed to drive LEDs
with a constant current. The device can drive up to 8 LEDs,
depending on the forward voltage of the LEDs, in series from a
voltage source of 6V to 36V. The AL8806 switches at frequencies up
to 1MHz. This allows the use of small size external components,
hence minimizing the PCB area needed.
Maximum output current of AL8806 is set via an external resistor
connected between the V
IN
and SET input pins. Dimming is achieved
by applying either a DC voltage or a PWM signal at the CTRL input
pin. An input voltage of 0.4V or lower at CTRL switches off the output
MOSFET simplifying PWM dimming.
Pin Assignments
SET
GND
GND
CTRL
1
2
3
4
AL8806
8
7
6
5
V
IN
N/C
SW
SW
MSOP-8EP
Features
LED driving current up to 1.5A
Better than 5% accuracy
High efficiency up to 98%
Operating input voltage from 6V to 36V
High switching frequency up to 1MHz
PWM/DC input for dimming control
Built-in output open-circuit protection
MSOP-8EP: Available in “Green” Molding Compound (No Br,
Sb) with lead Free Finish/ RoHS Compliant
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
High Power MR16 Lamps
General Illumination Lamps
Multi-Die LED Driver
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
DFLS230LH
D1
R
SET
0R089
V
IN
SET
D2
D3
GND
450µF
D4
D5
SW
12V
AC
CTRL
~
DFLS230LH
x4
C1
AL8806
33µH L1
C2
1µF
Multi-
die
LED
AL8806
Document number: DS35144 Rev. 5 - 2
1 of 15
www.diodes.com
July 2013
© Diodes Incorporated
AL8806
Pin Descriptions
Pin
Name
SW
GND
Pin Number
Function
MSOP-8EP
5, 6
Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.
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
)
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 Nominal Output Current Pin. Configure the output current of the device.
Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor – see applications section for
more information.
Exposed pad:
Connect to GND and thermal mass for enhanced thermal impedance. It should not be used as electrical ground
conduction path.
no connection
CTRL
4
SET
V
IN
EP
N/C
1
8
EP
7
Functional Block Diagram
AL8806
Document number: DS35144 Rev. 5 - 2
2 of 15
www.diodes.com
July 2013
© Diodes Incorporated
AL8806
Absolute Maximum Ratings
(@T
A
= +25°C, unless otherwise specified.)
Symbol
ESD HBM
ESD MM
V
IN
V
SW
V
CTRL
I
SW-RMS
I
SW-PK
T
J
T
LEAD
T
ST
Caution:
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
DC or RMS switch current
Peak switch current (<10%)
Junction Temperature
Lead Temperature Soldering
Storage Temperature Range
Ratings
2.5
200
-0.3 to +40
-0.3 to +40
-0.3 to +6
1.65
3
150
300
-65 to +150
Unit
kV
V
V
V
V
A
A
°C
°C
°C
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
I
SW
f
OSC
T
J
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
DC or RMS switch current
Switching Frequency
Junction Temperature Range
-40
Min
6.0
2.6
0.5
0
Max
36
5.5
2.5
0.4
1.5
1
+125
Unit
V
V
V
V
A
MHz
°C
Electrical Characteristics
(@V
IN
= 12V, T
A
= +25°C, unless otherwise specified.)
Symbol
V
INSU
V
INSH
I
Q
I
S
V
TH
V
TH-H
I
SET
R
CTRL
V
REF
R
DS(on)
I
SW_Leakage
JA
JC
Notes:
Parameter
Internal regulator start up threshold
Internal regulator hysteresis threshold
Quiescent current
Input supply Current
Set current Threshold Voltage
Set threshold hysteresis
SET pin input current
CTRL pin input resistance
Internal Reference Voltage
On Resistance of SW MOSFET
Switch leakage current
Thermal Resistance Junction-to-Ambient (Note 5)
Thermal Resistance Junction-to-Case (Note 5)
I
SW
= 1A
V
IN
=36V
V
IN
rising
V
IN
falling
Conditions
Min
100
Typ
Max
5.9
300
350
Unit
V
mV
µA
mA
mV
mV
µA
kΩ
V
Output not switching (Note 4)
CTRL pin floating f = 250kHz
V
CTRL
2.6V or floating.
V
SET
= V
IN
-0.1
Referred to internal reference
95
1.8
100
±20
16
50
2.5
0.18
69
4.3
5
105
22
0.35
0.5
μA
C/W
MSOP-8EP (Note 6)
MSOP-8EP (Note 6)
4. AL8806 does not have a low power standby mode but current consumption is reduced when output switch is inhibited: V
SENSE
= 0V. Parameter is
tested with V
CTRL
2.5V
5. Dominant conduction path via exposed pad. Refer to figure 5 for the device derating curve.
6. Measured on an FR4 51x51mm PCB with 2oz copper standing in still air with minimum recommended pad layout on top layer and thermal vias to
bottom layer maximum area ground plane. For better thermal performance, larger copper pad for heat-sink is needed.
AL8806
Document number: DS35144 Rev. 5 - 2
3 of 15
www.diodes.com
July 2013
© Diodes Incorporated
AL8806
Typical Performance Characteristics
400
V
CTRL
= 0V
900
V
SET
= V
IN
T
A
= 25 °C
L = 33µH
350
300
250
800
700
Frequency (kHz)
V
IN
= 12V
1 LED
R
SET
= 150m
T
A
= 25°C
600
500
400
300
200
L = 100µH
L = 68µH
I
IN
(µA)
 
200
150
100
50
0
100
0
15
20
25
30
V
I N
(V)
Supply Current (not switching) vs. Input Current
5
10
0
0
1
3
4
V
CTR L
(V)
Switching Frequency vs. V
CT RL
2
5
1.6
1.4
1.2
LED CURRENT (A)
1
0.8
0.6
0.4
0.2
0
T
A
= 25°C
L =68µH
R
SET
= 68m
80
V
SET
= V
IN
= 12V
60
40
I
CT RL
(µA)
T
A
= 25
C
R
SET
= 100m
20
0
-20
-40
-60
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V
CTRL
(V)
I
CTRL
vs V
CTRL
R
SET
= 150m
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
CTRL VOLTAGE (V)
LED Current vs. V
CTRL
3
2.52
V
CTRL
= Open
V
SET
= V
IN
= 12V
2.5
2.51
2
V
CTRL
(V)
1.5
V
CTRL
(V)
V
CTRL
= Open
V
SET
= V
IN
T
A
= 25
C
2.50
1
2.49
0.5
0
0
5
15
20
V
IN
(V)
V
CTRL
vs. Input Voltage
(CTRL pin open circuit)
10
25
30
2.48
-40
-15
10
35
60
85
Ambient Temperature (°C)
V
CTRL
vs. Temperature
110
AL8806
Document number: DS35144 Rev. 5 - 2
4 of 15
www.diodes.com
July 2013
© Diodes Incorporated
AL8806
Typical Performance Characteristics
(cont.)
5.0
4.5
4.0
LED Current Error (%)
V
IN
= 12V
1 LED
R
SET
= 150m
L = 68µH
1
0.9
0.8
0.7
LED Current (A)
200
180
160
140
R
DS(ON)
(m
)
120
100
80
60
40
20
0
0
5
10
V
CTRL
= Open
V
SET
= V
IN
12V
T
A
= 25
C
3.5
3.0
2.5
LED Current Error
0.6
0.5
0.4
I
LED
2.0
1.5
1.0
0.5
0.0
0%
20%
40%
60%
80%
PWM Duty Cycle
I
LED
vs. PWM Duty Cycle
0.3
0.2
0.1
0
100%
15
20
25
V
IN
(V)
R
DS(ON)
vs. Input Voltage
30
260
240
220
130
125
120
115
V
SENSE
18
16
14
12
V
SW
R
DS(ON)
(m
)
105
100
95
90
R
SET
= 150m
L = 68µH
V
IN
= 12V
1 LED Load
8
6
4
2
0
-2
0
4
6
Time (µs)
SW Output Switching Characteristics
2
8
160
140
120
100
-40
V
CTRL
= Open
V
SET
= V
IN
12V
85
-15
10
35
60
85
AMBIENT TEMPERATURE (°C)
SW R
DS(ON)
vs. Temperature
110
80
100%
90%
80%
70%
Duty Cycle
L = 33µH
R
SET
= 150m
T
A
= 25
C
2 LED
60%
50%
40%
30%
20%
10%
0%
6
9
12
15
18
21
24
Input Voltage (V)
Duty Cycle vs. Input Voltage
27
30
AL8806
Document number: DS35144 Rev. 5 - 2
5 of 15
www.diodes.com
July 2013
© Diodes Incorporated
V
SW
180
V
SENSE
(mV)
200
110
10
查看更多>
参数对比
与AL8806EV4相近的元器件有:AL8806、AL8806MP8-13。描述及对比如下:
型号 AL8806EV4 AL8806 AL8806MP8-13
描述 BOARD LED DRIVER 1.5A 30V LED DISPLAY DRIVER, PDSO8 供电电压(最高):36V 频率:- 类型:交直流离线开关 内部开关:有 拓扑结构:降压 供电电压(最低):6V
热门器件
热门资源推荐
器件捷径:
S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB SC SD SE SF SG SH SI SJ SK SL SM SN SO SP SQ SR SS ST SU SV SW SX SY SZ T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 TA TB TC TD TE TF TG TH TI TJ TK TL TM TN TO TP TQ TR TS TT TU TV TW TX TY TZ U0 U1 U2 U3 U4 U6 U7 U8 UA UB UC UD UE UF UG UH UI UJ UK UL UM UN UP UQ UR US UT UU UV UW UX UZ V0 V1 V2 V3 V4 V5 V6 V7 V8 V9 VA VB VC VD VE VF VG VH VI VJ VK VL VM VN VO VP VQ VR VS VT VU VV VW VX VY VZ W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 WA WB WC WD WE WF WG WH WI WJ WK WL WM WN WO WP WR WS WT WU WV WW WY X0 X1 X2 X3 X4 X5 X7 X8 X9 XA XB XC XD XE XF XG XH XK XL XM XN XO XP XQ XR XS XT XU XV XW XX XY XZ Y0 Y1 Y2 Y4 Y5 Y6 Y9 YA YB YC YD YE YF YG YH YK YL YM YN YP YQ YR YS YT YX Z0 Z1 Z2 Z3 Z4 Z5 Z6 Z8 ZA ZB ZC ZD ZE ZF ZG ZH ZJ ZL ZM ZN ZP ZR ZS ZT ZU ZV ZW ZX ZY
需要登录后才可以下载。
登录取消