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| 型号： | ZXLD1370EST16TC |
| 厂商： | Diodes Inc |
| 文件页数： | 28/39页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HIGH BRIGHT TSSOP-16 |
| 特色产品： | ZXLD1370 High Accuracy LED Driver |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，通用 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 300kHz ~ 1MHz |
| 电源电压： | 6 V ~ 60 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXLD1370EST16TCDKR |
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A Product Line of
Diodes Incorporated
ZXLD1370
Application Information (cont.)
Gate
2μs
< 10 ms
0V
Figure 30. PWM Dimming from Open Collector Switch
PWM
< 10 ms
0V
2μs
Figure 31 PWM Dimming from MCU
Figure 32 PWM Dimming Minimum and Maximum Pulse
LED current can be adjusted digitally, by applying a low frequency PWM logic signal to the PWM pin to turn the controller on and off. This
will produce an average output current proportional to the duty cycle of the control signal. During PWM operation, the device remains
powered up and only the output switch is gated by the control signal.
The PWM signal can achieve very high LED current resolution. In fact, dimming down from 100% to 0.1% at 500Hz, a minimum pulse width
of 2μs can be achieved resulting in very high resolution and accuracy. While the maximum recommended pulse is for the PWM signal is
10ms (equivalent to 100Hz) See Figure 32.
The ultimate PWM dimming ratio will be determined by the
switching frequency as the minimum PWM pulse width is
determined by resolving at least 1 switching cycle. The figure to the
right the switching waveforms for a low duty cycle PWM dimming.
As can be seen, when the LED current restarts (blue waveform) it
has to start all the way from zero to the peak level set by
V SENSE /R S* 1.15. So the first pulse is always longer than the
nominal switching frequency would imply.
The PWM pin can be used to put the device into standby. Taking
the PWM pin low (<0.4V) for more than 25ms (typically 15ms) the
device will enter its standby state and most of the internal circuitry
is switched off and residual quiescent current will be typically 90μA.
In particular, the Status pin will go down to GND while the FLAG
and REF pins will stay at their nominal values.
Figure 33 Standby State from PWM signal
When the device restarts from standby mode, a “start-up” time must be allowed for before the device resume full LED current regulation.
ZXLD1370
Document number: DS32165 Rev. 5 - 2
28 of 39
www.diodes.com
September 2012
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXLD1371 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER |
| ZXLD1371EST16TC | 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 |
| 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 |
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