- 您现在的位置：买卖IC网 > Sheet目录370 > ZXLD1356DACTC (Diodes Inc)IC LED DRIVER WHITE BCKLGT 6-DFN
A Product Line of
Diodes Incorporated
ZXLD1356/ ZXLD1356Q
Application Information
Setting Nominal Average Output Current with External Resistor R S
The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (R S ) connected between V IN
and I SENSE and is given by:
I OUTnom = 0.2/R S [for R S > 0.36 ? ]
The table below gives values of nominal average output current for several preferred values of current setting resistor (R S ) in the typical
application circuit shown on page 1:
R S ( ? )
0.36
0.56
1.33
Nominal Average Output
Current (mA)
555
357
150
The above values assume that the ADJ pin is floating and at a nominal voltage of V REF (= 1.25V). Note that R S = 0.36V is the minimum allowed
value of sense resistor under these conditions to maintain switch current below the specified maximum value.
It is possible to use different values of R S if the ADJ pin is driven from an external voltage. (See next section).
Output Current Adjustment by External DC Control Voltage
The ADJ pin can be driven by an external dc voltage (V ADJ ), as shown, to adjust the output current to a value above or below the nominal
average value defined by R S .
+
ADJ
ZXLD1356
GND
DC
GND
The nominal average output current in this case is given by:
I OUTdc = (V ADJ /1.25) x (0.2/R S ) [for 0.3< V ADJ <2.5V]
Note that 100% brightness setting corresponds to V ADJ = V REF . When driving the ADJ pin above 1.25V, R S must be increased in proportion to
prevent I OUTdc exceeding 550mA maximum.
The input impedance of the ADJ pin is 50k ? ±25% for voltages below V REF and 14.2k ? ±25% for voltages above V REF +100mV.
Output Current Adjustment by PWM Control
Directly driving ADJ input
A Pulse Width Modulated (PWM) signal with duty cycle D PWM can be applied to the ADJ pin, as shown below, to adjust the output current to a
value above or below the nominal average value set by resistor R S :
?
V ADJ
PWM
0V
GND
ADJ
ZXLD1356
GND
ZXLD1356/ ZXLD1356Q
Document number: DS33470 Rev. 4 - 2
19 of 29
www.diodes.com
October 2012
? Diodes Incorporated
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ZXLD1360ET5TA
IC LED DRIVR WHITE BCKLGT TSOT-5
ZXLD1362ET5TA
IC LED DRIVR WHITE BCKLGT TSOT-5
ZXLD1366DACTC
IC LED DRIVER WHITE BCKLGT 6-DFN
ZXLD1370EST16TC
IC LED DRVR HIGH BRIGHT TSSOP-16
ZXLD1371QESTTC
IC LED DRIVER
ZXLD1374EST20TC
IC LED DVR BUCK BOOST 20TSSOP
ZXLD1937ET5TA
IC LED DRIVR WHITE BCKLGT TSOT-5
ZXLD381FHTA
IC LED DRIVR WHITE BCKLT SOT23-3
相关代理商/技术参数
ZXLD1356ET5TA
功能描述:LED照明驱动器 550mA, 60V LED Drver, Int Swtch RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
ZXLD1356QET5TA
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V 550mA LED DRIVER and AUTOMOTIVE GRADE
ZXLD1360
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:30V 1A LED DRIVER with AEC-Q100
ZXLD1360ET5TA
功能描述:LED照明驱动器 7-30V Input 1Amp w/Internal Switch RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
ZXLD1360ET5TA-CUT TAPE
制造商:DIODES 功能描述:ZXLD1360 Series 1 A 1 MHz SMT LED Driver with Internal Switch - TSOT-23-5
ZXLD1362
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V 1A LED DRIVER WITH AEC-Q100
ZXLD1362_12
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V 1A LED DREIVER WITH AEC-Q100
ZXLD1362ET5TA
功能描述:LED照明驱动器 1A/60V LED DRIVER RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N