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2 - MHz的同步升壓轉(zhuǎn)換器
文件頁數(shù)： 18/45頁
文件大?。?/td> 1033K
代理商： TPS61050YZG
www.ti.com
SHUTDOWN
The MODE_CTRL[1:0] bits are low, the device is forced into shutdown. Depending on the setting of OV[1:0] the
device can enter different shutdown modes. In shutdown mode, the regulator stops switching and the LED pin is
high impedance thus eliminating any DC conduction path.
If OV[1:0]
≠
11, the internal switch and rectifier MOSFET are turned off. VOUT is one body-diode drop below the
input voltage and the device consumes only a shutdown current of 0.3
μ
A (typ). The output capacitor remains
biased to the input voltage.
LED FAILURE MODES
If the LED fails as a short circuit, the low-side current regulator limits the maximum output current and the LED
FAILURE (LF) flag will be set.
UNDERVOLTAGE LOCKOUT
The undervoltage lockout circuit prevents the device from misoperation at low input voltages. It prevents the
converter from turning on the switch or rectifier MOSFET under undefined conditions.
THERMAL SHUTDOWN
As soon as the junction temperature, T
, exceeds 160
°
C typical, the device goes into thermal shutdown. In this
mode, the
boost
power stage and the low-side current regulator are turned off, the MODE_CTRL[1:0] bits are
reset, the OVERTEMP bit is set and can only be reset by a readout.
TPS61050
TPS61052
SLUS525–MARCH 2007
DETAILED DESCRIPTION (continued)
If OV[1:0] = 11, the internal switch MOSFET is turned off and the rectifier MOSFET is turned on. In this
shutdown mode there is almost no dropout voltage between the converter’s input and output. The shutdown
current is 150
μ
A (typ).
If the LED fails as an open circuit, the control loop initially attempts to regulate off of its low-side current
regulator feedback signal. This drives VOUT higher. Because the open-circuited LED will never accept its
programmed current, VOUT must be voltage-limited by means of a secondary control loop. In this failure mode,
the TPS6105x limits VOUT to 6.0 V (typ.) and sets the LED FAILURE (LF) flag.
18
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參數(shù)描述
TPS61050YZGR 功能描述:LED照明驅(qū)動器 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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