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PT4110E89EのメーカーはPowtechです、この部品の機能は「High Efficiency White LED Driver」です。 |
部品番号 | PT4110E89E |
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部品説明 | High Efficiency White LED Driver | ||
メーカ | Powtech | ||
ロゴ | |||
このページの下部にプレビューとPT4110E89Eダウンロード(pdfファイル)リンクがあります。 Total 8 pages
PT4110
High Efficiency White LED Driver
GENERAL DESCRIPTION
The PT4110 is a high efficiency step-up DC/DC
converter designed for driving multiple strings of up to
eight series-connected white LED from a single cell
Lithium Ion battery. It regulates the output current,
ideal for driving light emitting diodes (LED) whose
light intensity is proportional to the current passing
through them. The external ballast resistor sets the LED
current ranging from 5mA to 20mA, which can be
easily adjusted using either a DC voltage or a pulse
width modulated (PWM) signal alternatively. Its low
300mV feedback voltage reduces power loss and
improves efficiency.
The PT4110 has multiple features to protect itself from
fault conditions including built-in open load protection,
cycle-by-cycle current limit, over temperature
shutdown, input under voltage control and integrated
soft-start.
The PT4110 is available in SOT-89-5 and SOP-8
packages.
FEATURES
z 2.7V to 5.5V Input Voltage Range
z 35V Maximum Step-Up Voltage
z <1µA Shutdown Mode
z 1.2MHz Fixed Frequency Operation
z Cycle-By-Cycle Current Limit
z Open Load Protection
z Under Voltage Lockout
z Integrated Soft-Start
z Thermal Shutdown
z Frequency Jittering for better EMI performance
z SOT89-5 or SOP8 package
APPLICATIONS
z White LED Power Suppliers
z Flat Screen LCD Bias Suppliers
z Portable Media Players
z GPSs
z General middle-sized LCD backlight
ORDERING INFORMATION
PACKAGE
TEMPERATURE ORDERING PART
RANGE
NUMBER
SOT89-5, Pb free
-40℃ to 85℃
PT4110E89E
SOP8, Pb free
-40℃ to 85℃
PT4110ESOP
Note:
xxxxxX
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tape and Reel
Tape and Reel
MARKING
PT4110
xxxxxX
PT4110
xxxxxX
TYPICAL APPLICATION CIRCUIT
China Resources Powtech (Shanghai) Limited
PT4110_DS Rev EN_1.3
WWW.CRPOWTECH.COM
Page 1
1 Page PT4110
High Efficiency White LED Driver
RECOMMENDED OPERATING RANGE
SYMBOL
VIN
TOPT
ITEMS
VDD Supply Voltage
Operating Temperature
VALUE
2.7 ~ 5.5
-40 to +85
UNIT
V
oC
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended
Operating Range indicates conditions for which the device is functional, but do not guarantee specific performance
limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Range. Specifications are
not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device
performance.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA,
and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA)/ θJA or the
number given in Absolute Maximum Ratings, whichever is lower.
Note 3: Human body model, 100pF discharged through a 1.5kΩ resistor.
ELECTRICAL CHARACTERISTICS (Note 4, 5)
VIN=VEN=3.6V, TA=25℃ unless specified otherwise
SYMBOL
ITEMS
CONDITIONS
VIN
VUVLO
VUVLO, HYS
Input Voltage
Under voltage lock out
UVLO hysterisis
VIN rising
VIN falling
Feedback
VFB FB Pin Voltage
IBIAS FB Pin Input Bias Current
Operating Current
IOFF
IOP
FSW
DMAX
Operating Current(Shutdown)
Operating Current(Active)
Switching Frequency
Maximum Duty Cycle
VSW-ON =0V
VFB=0V
Chip Enable
VEN_H
VEN_L
EN Minimum High Level
EN Maximum Low Level
Output Switch
RON
ILIMIT
ILEAK
SW On Resistance
SW Current Limit
SW Leakage Current
VIN = 5V
Vsw=5V
Open Circuit Protection
VOV Open Circuit Shutdown
Threshold
VIN = 5V
Min.
2.7
280
1.0
90
1.5
1.2
Typ.
2.3
100
300
0.05
0.1
3
1.2
95
0.4
1.5
0.01
35
Soft Start
tSST Soft Start Time
VIN Power On
0.8
Note 4: Typical parameters are measured at 25˚C and represent the parametric norm.
Note 5: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Max.
5.5
UNIT
V
V
mV
320 mV
1 µA
1 µA
5 mA
1.5 MHz
%
V
0.4 V
Ω
A
1 µA
V
ms
China Resources Powtech (Shanghai) Limited
PT4110_DS Rev EN_1.3
WWW.CRPOWTECH.COM
Page 3
3Pages PWM
PT4110
EN FB
LED1
LED2
LED3
R1
PT4110
High Efficiency White LED Driver
Typical application circuits:
VIN
C1
L1
15μH
D1
EN VIN SW
PT4110
GND
FB
Start-up and Inrush Current
The PT4110 has internal soft start to limit the amount
of current through VIN at startup and to also limit the
amount of overshoot on the output. The soft start is
realized by gradually increasing the current limit during
start-up. The current limit is increased by a forth every
200μS giving a total soft start time of around 800μS.
Board Layout Consideration
As with all switching regulators, careful attention must
be paid to the PCB board layout and component
placement. High frequency switching regulators require
very careful layout for stable operation and low noise.
To maximize efficiency, switch rise and fall times are
made as short as possible. To prevent electromagnetic
interference (EMI) problems, proper layout of the high
frequency switching path is essential. The voltage
signal of the SW pin has sharp rise and fall edges.
Minimize the length and area of all traces connected to
the SW pin and always use a ground plane under the
switching regulator to minimize interplane coupling. In
addition, the ground connection for the feedback
resistor R1 should be tied directly to the GND pin and
not shared with any other component, ensuring a clean,
noise-free connection.
VIN
C1
L1
15μH
D1
EN VIN SW
PT4110
GND
FB
VIN
C1
L1
15μH
MMPQ2222
D1
EN VIN SW
PT4110
GND
FB
China Resources Powtech (Shanghai) Limited
PT4110_DS Rev EN_1.3
WWW.CRPOWTECH.COM
Page 6
6 Page | |||
ページ | 合計 : 8 ページ | ||
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PDF ダウンロード | [ PT4110E89E データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
PT4110E89E | High Efficiency White LED Driver | Powtech |