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PT4113 Datasheet

480mA LED backlight

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PT4113
12 480mA/LED 背光驱动
APPLICATION NOTE
Title
2Channel, 480mA LED backlight
Applications Large-size LCD Backlight
Specification 24VDC Input; 42V(12 LEDs in Series), 480mA Output
Model No.
PT4113_D1_01
Doc. No.
PT4113_AN01
Revision
1.0
特点:
¾ 输入 24V DC; 12 LED 串联 480mA 输出。
¾ 软启动。
¾ 双路驱动输出。两路之间有 180 度相位差,降低对输入电源的要求。
¾ 各通道具有独立的 PWM 调光控制。
¾ 模拟调光控制。
¾ 恒定的工作频率。
¾ 芯片与芯片间工作频率的同步。
¾ 过压保护。
¾ 输出短路保护及输出对地短路保护。
¾ 输出过载保护。
¾ 出错保护状态输出。
China Resources Powtech (Shanghai) Co., Ltd
PT4113_AN01_Rev 1.0
WWW.CRPOWTECH.COM
Page 1 of 15




PowTech

PT4113 Datasheet Preview

PT4113 Datasheet

480mA LED backlight

No Preview Available !

PT4113
12 480mA/LED 背光驱动
目录
1 简介 .................................................................................................................................4
2 技术数据 ..........................................................................................................................4
3 Demo 板图片 ...................................................................................................................5
Figure 1 Top & Bottom View................................................................................................................................. 5
4 电路原理图 ......................................................................................................................6
Figure 2 Schematic ................................................................................................................................................ 6
5 PCB 版图 .........................................................................................................................6
6 Demo 板材料清单 ............................................................................................................7
7 磁性元件规格...................................................................................................................9
7.1 物理尺寸...............................................................................................................................................9
Figure 3 物理尺寸 ................................................................................................................................................. 9
7.2 电器参数...............................................................................................................................................9
8 性能评估 ..........................................................................................................................9
8.1 效率.......................................................................................................................................................9
8.2 输入输出波形.....................................................................................................................................10
Figure 4 输入输出波形 ....................................................................................................................................... 10
8.3 开机启动延时.....................................................................................................................................10
Figure 5 开机启动延时 ....................................................................................................................................... 10
8.4 输出开路及短路保护 .........................................................................................................................11
Figure 6 输出开路保护 ....................................................................................................................................... 11
Figure 7 输出短路保护 ....................................................................................................................................... 11
Figure 8 输出对地短路保护 ............................................................................................................................... 11
9 设计要点 ........................................................................................................................12
9.1 频率设定.............................................................................................................................................12
9.2 多芯片同步.........................................................................................................................................12
9.3 模拟调光.............................................................................................................................................12
9.4 PWM 调光 ..........................................................................................................................................12
China Resources Powtech (Shanghai) Co., Ltd
PT4113_AN01_Rev 1.0
WWW.CRPOWTECH.COM
Page 2 of 15


Part Number PT4113
Description 480mA LED backlight
Maker PowTech
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