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| 型号： | ZXLD1371EST16TC |
| 厂商： | Diodes Inc |
| 文件页数： | 39/42页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER |
| 特色产品： | ZXLD1371 LED Driver Controller |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | ZXLD1371EST16TCDIDKR |
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A Product Line of
Diodes Incorporated
ZXLD1371
Applications Information (cont.)
Over-Voltage Protection
The ZXLD1371 is inherently protected against open-circuit load when used in Buck configuration. However care has to be
taken with open-circuit load conditions in Buck-Boost or Boost configurations. This is because in these configurations there
is no internal open-circuit protection mechanism for the external MOSFET. In this case an Over-Voltage-Protection (OVP)
network should be provided externally to the MOSFET to avoid damage due to open circuit conditions. This is shown in
figure 19 below, highlighted in the dotted blue box.
Figure 19. OVP Circuit
The zener voltage is determined according to: Vz = V LEDMAX +10% where V LEDMAX is maximum LED chain voltage.
If the LEDA voltage exceeds V Z the gate of MOSFET Q2 will rise turning Q2 on. This will pull the PWM pin low and switch
off Q1 until the voltage on the drain of Q1 falls below Vz. If the voltage at LEDA remains above V Z for longer than 20ms
then the ZXLD1371 will enter into a shutdown state.
Care should be taken such that the maximum gate voltage of the Q2 MOSFET is not exceeded.
Take care of the max voltage drop on the Q2 MOSFET gate. Typical devices for Z1 and Q2 are BZX84C and 2N7002
ZXLD1371
Document number: DS35436 Rev. 1 - 2
39 of 42
www.diodes.com
February 2012
? Diodes Incorporated
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| ZXLD1371QESTTC | 功能描述:MOSFET LED Controller TSSOP TSSOP-16EP T&R 2.5K RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| ZXLD1374 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST |
| ZXLD1374_11 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST |
| ZXLD1374EST20TC | 功能描述:LED照明驱动器 60V 1.5A BUCK/BOOST LED DRIVER AEC-Q100 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 |
| ZXLD1601 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:ADJUSTABLE DC - DC BOOST CONVERTER WITH INTERNAL SWITCH IN SC70 |
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