參數(shù)資料
型號(hào)： 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(yè)數(shù)： 22/45頁(yè)
文件大?。?/td> 1033K
代理商： TPS61050YZG
www.ti.com
LED ON with Reduced Current
PWM Dimming Steps = 0.8%,1.6%, 2.3%, 3.1%, 3.9%, 4.7%, 6.3%, 8.6%
I
TORCH
FREE
FREE
FREE
I2C Bus
TC[2:0] = I
DIM = 1
TORCH
FREE
FREE
FREE
LED OFF
I
TORCH
TC[2:0] = 000
DIM = 0
TC[2:0] = I
DIM = 1
TORCH
TC[2:0] = 000
DIM = 0
3-BIT ADC
The TPS6105x device integrates a 3 bit A/D converter to measure the differential voltage across the output and
the low-side current regulator. In order to get a proper settling of the LED forward voltage, the data acquisition is
done approximately 10 ms after the start of the flash sequence.
CIN
VBAT
COUT
P
P
L
I
REF
Low-Side Current Regulator
P
P
LED
VOUT
+
-
ADC
S/H
3-Bit ADC
ADC[2:0]
START FLASH
10 ms
Delay
LED FAILURE
VOUT-LED <1.5 V
WRITE REGISTER 2[5:3] = 111
ADC Digital Output Coding, ADC [2:0]
000: (VOUT-LED) <3.20 V
001: 3.20 V
≤
(VOUT-LED) <3.35 V
010: 3.35 V
(VOUT-LED) <3.50 V
011: 3.50 V
(VOUT-LED) <3.65 V
100: 3.65 V
(VOUT-LED) <3.80 V
101: 3.80 V
(VOUT-LED) <3.95 V
110: 3.95 V
(VOUT-LED) <4.10 V
111: (VOUT-LED)
4.10 V
≤
≤
≤
≤
≤
≥
TPS61050
TPS61052
SLUS525–MARCH 2007
White LED blinking can be achieved by turning on/off periodically the LED dimmer via the (DIM) bit, see
Figure 40
.
Figure 40. White LED Blinking Control
When running in the linear down-mode (V
< V
), the low-side current regulator drops the voltage difference
between the input voltage and the LED forward voltage. This may result in thermal limitations (especially for
CSP-12 packaging) when running high LED current under high battery conditions (V
IN
≥
4.5 V) with low forward
voltage LEDs and/or high ambient temperature.
The LED forward voltage measurement can be started either by a START FLASH event (FLASH_SYNC or SFT
bit) or by setting ADC[2:0] bits (whilst MODE_CTRL[1:0]=01 or 10).
Figure 41. LED VF Measurement Principle
22
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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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