A8169-025 [AITSEMI]
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER;
| 型号： | A8169-025 |
| 厂家： | 
AiT Semiconductor |
| 描述： | PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER 驱动 |
| 文件： | 总9页 (文件大小：435K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
DESCRIPTION
FEATURES
The A8169-025 Series is a fixed frequency, constant
current step-up DC/DC converter ideal for driving LEDs
used in backlighting applications on cellular phones,
PDAs and digital cameras etc. Output voltage of up to 23V
can be derived, and from a 3.2V input six white LED’s can
be driven in series or alternatively, using a 2.5V input, a
network of two parallel legs with three in each may be
driven.
Input voltage range: 2.5V~6V
Output voltage range: up to 23V externally
set-up reference voltage 0.25V
Oscillation frequency: 1.0MHz
On resistance: 0.8Ω
Efficiency: 88%(When driving 3 white LEDs
in
series VIN=3.6V ILED=20mA)
Control: PWM control
Luminance of the LED’s is controlled by changing the duty
cycle of a PWM signal applied to the CE pin. In addition,
an internal MOSFET with an RDS(ON) of 0.8Ω is used. Allow
profile and small board area solution can be achieved
using a chip coil and an ultra small ceramic output
capacitor (CL) of 0.22uF.
Stand-by Current: ISTB=1.0uA
Load capacitor: 0.22uF,ceramic
Lx limit Current:1.0A
Available in SOT-26 package
APPLICATIONS
The A8169-025 is available in SOT-26 Package.
For White LED Drivers
TYPICAL APPLICATION
Mobil phones, PHS
PDAsꢀGPSs
Digital still cameras
ORDERING INFORMATION
Package Type
SOT-26
Part Number
A8169E6R-025
A8169E6VR-025
E6
R: Tape & Reel
Note
V: Halogen free Package
AiT provides all RoHS free products
Suffix ꢁ V ꢁ means Halogen free Package
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 1 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
PIN DESCRIPTION
Top View
Pin #
Symbol
LX
Function
1
2
3
4
5
6
Switch
VSS
Ground
FB
Voltage Feedback
Chip Enable
CE
OVP
VIN
Over Voltage Protection
Power Supply
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 2 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
ABSOLUTE MAXIMUM RATINGS
VIN Pin Voltage
Vss-0.3V～Vss+7V
Vss-0.3V～Vss+28V
Vss-0.3V～Vss+28V
Vss-0.3V～Vss+7V
Vss-0.3V～Vss+7V
Vss-0.3V～Vss+28V
1300mA
OUT Pin Voltage
LX Pin Voltage
FB Pin Voltage
CE Pin Voltage
OVP Pin Voltage
LX Pin Current
Power Dissipation
250mW
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10s)
-40℃～ꢂ85℃
-55℃～ꢂ125℃
260℃
Stresses above may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the Electrical Characteristics is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 3 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
ELECTRICAL CHARACTERISTICS
TA=25°C, unless otherwise noted
Parameter
Symbol
VFB
Condition
Min.
0.235
VIN
Typ.
0.25
Max.
0.265
23
Unit
V
Circuits
1
FB Control Voltage
Output Voltage Range
Lx Operating Voltage Range
Operating Voltage Range
VOUT
VLX
V
23
V
VIN
2.5
6
V
VCE=0V,
Stand-by Current
Supply Current 1
Supply Current 2
ISTB
IDD1
1
uA
uA
uA
3
2
3
VLX=5V
550
400
VIN=VLX,
IDD2
VFB=0.4V
Oscillation Frequency
Maximum Duty Cycle
FOSC
0.8
86
1.0
92
1.2
98
MHz
%
2
2
MAXDY VCONT=0.4V
VIN=3.6V;
EFFI
Efficiency
88
%
1
RLED=12.5Ω
Current Limit
ILIM
VIN=3.6
1.0
25
A
V
4
2
LX Overvoltage Limit
LXOVL
23
27
VIN=3.6V,
VLX=0.4V
LX On Resistance
0.8
0
Ω
2
LX Leak Current
CE ꢁHꢃ Voltage
CE ꢁLꢃ Voltage
ILXL
VCEH
VCEL
1
uA
V
3
2
2
1.4
0.5
V
VIN=V LX
,
CE ꢁHꢃ Current
CE ꢁLꢃ Current
FB ꢁHꢃ Current
FB ꢁLꢃ Current
ICEH
ICEL
IFBH
IFBL
1
1
uA
uA
uA
uA
3
3
3
3
VFB=0.4V
VIN =VLX,
VFB=0.4V
VIN = VLX,
VFB=0.4V
VIN = VLX,
VFB=0.4V
0.1
-0.1
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 4 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
TYPICAL PERFORMANCE CHARACTERISTICS
1.
CH1=CE, CH2=FB
2.
100Hz, 6 series LED, ILED=20mA
100Hz, 4 series LED, ILED=20mA
3.
10KHz, 4 series LED, ILED=20mA
4.
10KHz, 6 series LED, ILED=20mA
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 5 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
TEST CIRCUIT
1.
Circuit 1
2.
Circuit 2
3.
Circuit 3
4.
Circuit 4
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 6 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
BLOCK DIAGRAM
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 7 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
PACKAGING INFORMATION
Dimension in SOT-26 Package (Unit: mm)
SYMBOL
MIN
MAX
1.250
0.100
1.150
0.500
0.200
3.020
1.700
2.950
A
A1
A2
b
1.050
0.000
1.050
0.300
0.100
2.820
1.500
2.650
c
D
E
E1
e
0.950(BSC)
e1
L
1.800
0.300
0°
2.000
0.600
8°
θ
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 8 -
A8169-025
LED BACKLIGHT DRIVER
AiT Semiconductor Inc.
www.ait-ic.com
PWM MODE 23V STEP-UP SERIES WHITE LED DRIVER
IMPORTANT NOTICE
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer.
As used herein may
In order to
involve potential risks of death, personal injury, or servere property, or environmental damage.
minimize risks associated with the customer's applications, the customer should provide adequate design and
operating safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV2.1
- JUN 2010 RELEASED, FEB 2013 UPDATED -
- 9 -
相关型号：
©2020 ICPDF网 联系我们和版权申明