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參數(shù)資料
| 型號： | TPS61052YZG |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE |
| 中文描述： | 1.2 A的高功率白光LED I2C兼容接口的驅(qū)動2 - MHz的同步升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/45頁 |
| 文件大小： | 1033K |
| 代理商： | TPS61052YZG |
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CSP-12
QFN-10
www.ti.com
FEATURES
Four Operational Modes
–
Torch and Flash up to I
LED
= 1200 mA
–
Voltage-Regulated Boost Converter:
4.5/5.0/5.25 V
–
Shutdown: 0.3
μ
A (typ)
Total Solution Circuit Area < 25 mm
2
Up to 96% Efficiency
I
2
C-Compatible Interface up to 400 kbps
Integrated LED Turn-On Safety Timer
Zero Latency TX-Masking Input (TPS61050)
Hardware Voltage Mode Selection Input
(TPS61052)
Integrated ADC for LED V
F
Monitoring
Integrated Low Light Dimming Mode
LED Disconnect During Shutdown
Open/Shorted LED Protection
Over-Temperature Protection
Available in a 12-Pin NanoFree (CSP) and
10-Pin QFN Packaging
DESCRIPTION
The TPS6105x device is based on a high-frequency
synchronous-boost topology with constant current
sink to drive single white LEDs. The device uses an
inductive fixed-frequency PWM control scheme using
small external components, minimizing input ripple
current.
APPLICATIONS
Camera White LED Torch/Flash for Cell
Phones, Smart-Phones and PDAs
Audio Amplifier Power Supply
VOUT
AVIN
SW
C
IN
SW
LED
PGND
PGND
P
P
P
AGND
GPIO
SDA
SCL
I2C I/F
FLASH_SYNC
L
P
TPS61050
2.2 H
m
C
10 F
OUT
m
+ BATTERY
LED ANODE
D
PGND
I
C
O
C
INDUCTOR
C1
L1
C2
LED
SENSE
A
4
4.7 mm
PGND
TPS61050
TPS61052
SLUS525–MARCH 2007
1.2-A HIGH POWER WHITE LED DRIVER
2-MHz SYNCHRONOUS BOOST CONVERTER WITH I
2
C COMPATIBLE INTERFACE
The 2-MHz switching frequency allows the use of
small and low profile 2.2-
μ
H inductors. To optimize
overall efficiency, the device operates with only a
250 mV LED feedback voltage.
The TPS6105x device not only operates as a
regulated current source, but also as a standard
voltage-boost regulator. This additional operating
mode can be useful to supply other high-power
devices in the system, such as a hands-free audio
power amplifier, or any other component requiring a
supply voltage higher than the battery voltage (refer
to TPS61052).
For highest flexibility, the LED current or the desired
output voltage can be programmed via an I
2
C
compatible
interface.
synchronization with the camera module, the device
offers a trigger pin (FLASH_SYNC) for fast LED
turn-on time.
To
simplify
flash
When the TPS6105x is not in use, it can be put into
shutdown mode via the I
2
C-compatible interface,
reducing the input current to 0.3
μ
A (typ). During
shutdown, the LED pin is high impedance to avoid
leakage current through the LED.
Figure 1. Typical Application
Figure 2. Typical PC-Board Layout
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NanoFree, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 2007, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61052YZGR | 功能描述:LED照明驅(qū)動器 1.2A High Pwr White LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61052YZGT | 功能描述:LED照明驅(qū)動器 1.2A High Pwr White LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61054 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH STANDARD LOGIC INTERFACE |
| TPS61054_08 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH STANDARD LOGIC INTERFACE |
| TPS61054DRC | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH STANDARD LOGIC INTERFACE |
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