- 您现在的位置：买卖IC网 > Sheet目录310 > AP8800AWT-7 (Diodes Inc)IC LED DRIVER TSOT23-5
AP8800A
Application Information (cont.) (@T A = +25°C, V IN = 12V, unless otherwise specified.)
Inductor Selection
A 68 μ H inductor or higher, is recommended for most AP8800A applications with input voltage at 12V.
Figure 3 displays the resulting switching frequency with various main circuit parameters: Supply voltage, Inductor value and number of LEDs to
be driven.
Switching Frequency
700
600
500
47
100
400
300
200
68
100
150
150
220
220
470
12V - 1LED
24V - 3 LEDs
28V - 4LEDs
100
470
0
0
50
100
150
200
250
300
350
400
450
500
Inductor Value [uH]
Figure 3 Switching Frequency vs. Supply Voltage, Inductor, and Number of LEDs
Capacitor Selection
A low ESR capacitor should be used for input decoupling, as the ESR of this capacitor appears in series with the supply source impedance and
lowers overall efficiency. This capacitor has to supply the relatively high peak current to the coil and smooth the current ripple on the input
supply. A minimum value of 1 μ F is acceptable if the DC input source is close to the device, but higher values will improve performance at lower
input voltages, especially when the source impedance is high. The input capacitor should be placed as close as possible to the IC.
For AC input sources a bigger capacitor ( 300uF in the case of 12C AC) to guarantee the accuracy of the LED current.
For maximum stability over temperature and voltage, capacitors with X7R, X5R, or better dielectric are recommended.
Capacitors with Y5V dielectric are not suitable for decoupling in this application and should NOT be used.
Diode Selection
For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance SBR diode with low reverse leakage at the
maximum operating voltage and temperature. The recommended diode for use with this part is the SBR1A40, with a current rating above the
peak coil current and a continuous current rating higher than the maximum output load current. It is very important to consider the reverse
leakage of the diode when operating above 85°C. Excess leakage will increase the power dissipation in the device.
AP8800A
Document number: DS35100 Rev. 3 - 2
7 of 13
www.diodes.com
August 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
AP8800FNG-7
IC LED DRIVER HIGH BRIGHT 10DFN
AP8801M8G-13
IC LED DRIVER HIGH BRIGHT 8MSOP
AP8802HSP-13
IC LED DRIVER HIGH BRIGHT 8SOIC
AP8802SPG-13
IC LED DRIVER HIGH BRIGHT 8SOIC
AP8803WTG-7
IC LED DRIVER CONN CURR TSOT23-5
APEK4402KLP-01-T-DK
BOARD EVAL FOR A4402
APP-001-15AMP
PLUG AUTO PWR BLACK W/LED 15AMP
APP-001-20AMP
AUTO PLUG 12VOLT WITH 20AMP FUSE
相关代理商/技术参数
AP8800EV1
功能描述:AP8800 1, Non-Isolated Output LED Driver Evaluation Board 制造商:diodes incorporated 系列:- 零件状态:有效 电流 - 输出/通道:300mA 输出和类型:1，非隔离 电压 - 输出:- 特性:可调光 电压 - 输入:8 V ~ 28 V 所含物品:板 使用的 IC/零件:AP8800 标准包装:1
AP8800EV2
功能描述:AP8800 1, Non-Isolated Output LED Driver Evaluation Board 制造商:diodes incorporated 系列:- 零件状态:有效 电流 - 输出/通道:300mA 输出和类型:1，非隔离 电压 - 输出:- 特性:可调光 电压 - 输入:8 V ~ 28 V 所含物品:板 使用的 IC/零件:AP8800 标准包装:1
AP8800FNG-7
功能描述:LED照明驱动器 28V, 350mA LED DC/DC Converter 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
AP8800M8G-13
功能描述:LED照明驱动器 28V, 350mA LED DC/DC Converter 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
AP8800SG-13
功能描述:LED照明驱动器 28V, 350mA LED DC/DC Converter 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
AP8800SG-13-CUT TAPE
制造商:DIODES 功能描述:AP8800 Series 350 mA 28 V 600 kHz SMT LED Step-Down Converter - SOIC-8L
AP8801
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:500mA LED Step-Down Converter
AP8801_0912
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:500mA LED Step-down Converter