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參數(shù)資料
| 型號： | TPS61050YZG |
| 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(dòng)2 - MHz的同步升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 21/45頁 |
| 文件大?。?/td> | 1033K |
| 代理商： | TPS61050YZG |
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HARDWARE VOLTAGE MODE SELECTION (TPS61052)
The TPS61052 device integrates a logic input (ENVM) that can be used to force the converter to run in voltage
mode regulation. This additional operating mode can be useful to supply other high power consumption devices
in the system (e.g. hands-free audio power amplifier...) or any other component requiring a supply voltage higher
than the battery voltage.
LOW LIGHT DIMMING MODE
The TPS6105x device features white LED drive capability at very low light intensity. To generate a reduced LED
average current, the device employs a 122 Hz fixed frequency PWM modulation scheme. Operation is
understood best by referring to the timer block diagram.
PWM Dimming Steps (DCTIM)
0.8%, 1.6%, 2.3%, 3.1%, 3.9%, 4.7%, 6.3%, 8.6%
I
TORCH
0
I
LED(DC)
= I
TORCH
x DCTIM
Torch Current Steps (TC)
50mA, 75mA, 100mA, 150mA, 200mA, 250mA
TPS61050
TPS61052
SLUS525–MARCH 2007
DETAILED DESCRIPTION (continued)
Table 2
gives an overview of the different mode of operation of TPS61052.
Table 2. TPS61052 Operating Modes
INTERNAL REGISTER
SETTINGS MODE_CTRL[1:0]
ENVM
OPERATING MODES
Power stage is in shutdown. The output is either connected directly to the battery
(OV[1:0]=11, rectifier is bypassed) or via the rectifer’s body diode (OV[1:0]=01). In both case
the power stage LC filter is connected in series between the battery and the output.
LED is turned-on for DC light operation. The converter is operating in the current regulation
mode (CM). The output voltage is controlled by the forward voltage characteristic of the LED.
LED is turned-on for flash operation. The converter is operating in the current regulation
mode (CM). The output voltage is controlled by the forward voltage characteristic of the LED.
LED is turned-off and the converter is operating in the voltage regulation mode (VM). The
output voltage is set via the register OV[1:0].
LED is turned-off and the converter is operating in the voltage regulation mode (VM). The
output voltage is set via the register OV[1:0].
The converter is operating in the voltage regulation mode (VM) and it’s output voltage is set
via the register OV[1:0]. The LED is turned-on for torch operation according to the register
TC[2:0]. The LED current is regulated by the means of the low-side current sink.
The converter is operating in the voltage regulation mode (VM) and it’s output voltage is set
via the register OV[1:0]. The LED is turned-on for flash operation according to the register
FC[2:0]. The LED current is regulated by the means of the low-side current sink.
LED is turned-off and the converter is operating in the voltage regulation mode (VM). The
output voltage is set via the register OV[1:0].
00
0
01
0
10
0
11
0
00
1
01
1
10
1
11
1
The torch current is modulated with a duty cycle defined by the DCTIM[2:0] bits. The low light dimming mode
can only be activated in the torch only mode, MODE_CTRL[1:0] = 01.
Figure 39. PWM Dimming Principle
21
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61050YZGR | 功能描述:LED照明驅(qū)動(dòng)器 1.2A High Pwr White 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 |
| TPS61050YZGT | 功能描述:LED照明驅(qū)動(dòng)器 1.2A High Pwr White 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 |
| TPS61052 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE |
| TPS61052DRC | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE |
| TPS61052DRCR | 功能描述:LED照明驅(qū)動(dòng)器 Synch Boost Conv. w/ I2C for Pwr LEDs 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 |
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