中国台湾Chroma 6310A系列可编程直流电子负载
6310A系列可编程直流电子负载主要特色： - *的LED模式，可供LED driver测试
- 可编程的LED操作点阻抗(Rd)
- 可编程的内部阻抗(Rr)，可应用于模拟LED的涟波电流
- 快速响应，可供PWM调光测试
- 一机框最多可达8个通道
- 二段式16位高精密电压/电流量测线路
- 保护功能：过电压、过电流、过功率、过温度保护
LED driver为电流源，因此有一可输出的电压范围及一固定的输出电流。在LED driver的测试上，一般常使用的方式有下列几种： 
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 | 由LED的V-I特性曲线中，可知LED有一顺向偏压VF及一导通电阻(Rd)。当以真实电阻为负载，其V-I特型是一直线，并无法模拟LED的特性。尤其当LED driver开机电压上升时，电流波形不同，可能会无法开机。而传统电子负载的CR及CV模式，都是以稳态时的LED操作点为设定值，对开关机或PWM调光动态的特性，无法模拟，也可能导致LED driver产生不正常的动作或保护。而若以LED来当负载，虽能*测试LED driver。但却有LED老化问题，及LED driver不同的输出电压测试上，需串联不同颗数的LED，如此将会造成测试上与生产上的不便。 |
致茂6310A series电子负载中的63110A新创了一个新的操作模式—LED模式，来模拟LED。使用者仅需透过设定LED driver的输出电压、电流，即可模拟LED的拉载特性。还可设定LED的操作点阻抗及高频阻抗，让拉载电流及高频连波与更趋近于真实LED。对于PWM调光(Dimming)测试，63110A的全新设计中，亦增加了频宽，让使用者亦可透过电子负载完成动态调光测试。 
图2是以LED为负载所拉载的电流波形(蓝色)；图3为63110ALED 模式的拉载电流波形(蓝色) ；由图2与图3可观察到两者于LED driver于开机时的拉载电压电流波形非常相似。图4为测LED为负载在调光(Dimming)时的电流波形。图5为63110A为负载在调光(Dimming)时的电流波形。
LED driver的输出涟波电流可以透过调整63110A内部电阻 (Rr) 来模拟。传统电子负载无法模拟LED driver的输出涟波电流，如图6所示。图7为LED当负载时的涟波电流。图8为63110A当负载时的涟波电流。
图9是以真实电阻为负载的拉载电流波形(蓝色)；图10为定电阻模式模拟真实电阻的拉载电流波形(蓝色)；图9与图10的电流与LED为负载的电流波形有相当大差异，且电流及电压都有过冲的情况发生，易导致LED driver在开机时发生过电压或过电流保护，如图11所示。因此不管是真实电阻或是电子负载的定电阻模式，都比较无法模拟真实的情况。
  中国台湾Chroma 6310A系列可编程直流电子负载
Model | 63101A | 63102A (100Wx2) | 63103A | Power | 20W | 200W | 20W | 100W | 30W | 300W | Current | 0~4A | 0~40A | 0~2A | 0~20A | 0~6A | 0~60A | Voltage *3 | 0~80V | 0~80V | 0~80V | Typical Min. Operation Voltage
(DC)*1 | 0.4V@2A | 0.4V@20A | 0.4V@1A | 0.4V@10A | 0.4V@3A | 0.4V@30A | 0.8V@4A | 0.8V@40A | 0.8V@2A | 0.8V@20A | 0.8V@6A | 0.8V@60A | Constant Current Mode | Range | 0~4A | 0~40A | 0~2A | 0~20A | 0~6A | 0~60A | Resolution | 1mA | 10mA | 0.5mA | 5mA | 1.5mA | 15mA | Accuracy | 0.1%+0.1%F.S. | 0.1%+0.2%F.S. | 0.1%+0.1%F.S. | 0.1%+0.2%F.S. | 0.1%+0.1%F.S. | 0.1%+0.2%F.S. | Constant Resistance Mode | Range | 0.0375Ω~150Ω (200W/16V)
1.875Ω~7.5kΩ (200W/80V) | 0.075Ω~300Ω (100W/16V)
3.75Ω~15kΩ (100W/80V) | 0.025Ω~100Ω (300W/16V)
1.25Ω~5kΩ (300W/80V) | Resolution*5 | 6.667mS (200W/16V)
133μS (200W/80V) | 3.333mS (100W/16V)
66.667μS (100W/80V) | 10mS (300W/16V)
200μS (300W/80V) | Accuracy | 150Ω: 0.1S+ 0.2%
7.5kΩ: 0.01S + 0.1% | 300Ω: 0.1S + 0.2%
15kΩ: 0.01S + 0.1% | 100Ω: 0.1S+ 0.2%
5kΩ: 0.01S+ 0.1% | Constant Voltage Mode | Range | 0~80V | 0~80V | 0~80V | Resolution | 20mV | 20mV | 20mV | Accuracy | 0.05% + 0.1%F.S. | 0.05% + 0.1%F.S. | 0.05% + 0.1%F.S. | Constant Power Mode | Range | 0~20W | 0~200W | 0~20W | 0~100W | 0~30W | 0~300W | Resolution | 5mW | 50mW | 5mW | 25mW | 7.5mW | 75mW | Accuracy | 0.5% + 0.5%F.S. | 0.5% + 0.5%F.S. | 0.5% + 0.5%F.S. | Dynamic Mode | Dynamic Mode | C.C. Mode | C.C. Mode | C.C. Mode | T1 & T2 | 0.025ms ~ 50ms / Res: 5μs
0.1ms ~ 500ms / Res: 25μs 10ms ~ 50s / Res: 2.5ms | 0.025ms ~ 50ms / Res: 5μs
0.1ms ~ 500ms / Res: 25μs 10ms ~ 50s / Res: 2.5ms | 0.025ms ~ 50ms / Res: 5μs
0.1ms ~ 500ms / Res: 25μs 10ms ~ 50s / Res: 2.5ms | Accuracy | 1μs/1ms+100ppm | 1μs/1ms+100ppm | 1μs/1ms+100ppm | Slew Rate | 0.64~160mA/μs | 6.4~1600mA/μs | 0.32~80mA/μs | 3.2~800mA/μs | 0.001~0.25A/μs | 0.01~2.5A/μs | Resolution | 0.64mA/μs | 6.4mA/μs | 0.32mA/μs | 3.2mA/μs | 0.001A/μs | 0.01A/μs | Accuracy | 10% ±20μs | 10% ±20μs | 10% ±20μs | Min. Rise Time | 10μs (Typical) | 10μs (Typical) | 10μs (Typical) | Current | 0~4A | 0~40A | 0~2A | 0~20A | 0~6A | 0~60A | Resolution | 1mA | 10mA | 0.5mA | 5mA | 1.5mA | 15mA | Accuracy | 0.4%F.S. | 0.4%F.S. | 0.4%F.S. | Measurement Section | Voltage Read Back | Range | 0~16V | 0~80V | 0~16V | 0~80V | 0~16V | 0~80V | Resolution | 0.25mV | 1.25mV | 0.25mV | 1.25mV | 0.25mV | 1.25mV | Accuracy | 0.025% + 0.025%F.S. | 0.025% + 0.025%F.S. | 0.025% + 0.025%F.S. | Current Read Back | Range | 0~4A | 0~40A | 0~2A | 0~20A | 0~6A | 0~60A | Resolution | 0.0625mA | 0.625mA | 0.03125mA | 0.3125mA | 0.09375mA | 0.9375mA | Accuracy | 0.05% + 0.05%F.S. | 0.05% + 0.05%F.S. | 0.05% + 0.05%F.S. | Power Read Back*2 | Range | 0~20W | 0~200W | 0~20W | 0~100W | 0~30W | 0~300W | Accuracy | 0.1% + 0.1%F.S. | 0.1% + 0.1%F.S. | 0.1% + 0.1%F.S. | Protective Section | Over Power Protection | Yes | Yes | Yes | Over Current Protection | Yes | Yes | Yes | Over Temperature Protection | Yes | Yes | Yes | Over Voltage Alarm*3 | Yes | Yes | Yes | General | Short Circuit | Current (CC) | - | ≒40A | - | ≒20A | - | ≒60A | Voltage (CV) | - | 0V | - | 0V | - | 0V | Resistance (CR) | - | ≒0.0375Ω | - | ≒0.075Ω | - | ≒0.025Ω | Power (CP) | - | ≒200W | - | ≒100W | - | ≒300W | Input Resistance
(Load Ω ) | 100kΩ (Typical) | 100kΩ (Typical) | 100kΩ (Typical) | Temperature Coefficient | 100PPM/℃( (Typical) | 100PPM/℃(Typical) | 100PPM/℃( (Typical) | Power | Supply from 6314A Mainframe | Supply from 6314A Mainframe | Supply from 6314A Mainframe | Dimensions (HxWxD) | 172x82x489.5mm / 6.8x3.2x19.3inch | 172x82x489.5mm / 6.8x3.2x19.3inch | 172x82x489.5mm / 6.8x3.2x19.3inch | Weight | 4.2 kg / 9.3 lbs | 4.2 kg / 9.3 lbs | 4.2 kg / 9.3 lbs | Operating Temperature Range | 0~40℃ | 0~40℃ | 0~40℃ | EMC & Safety | CE | CE | CE |
63103A面板说明
Model 6310A系列选型表 型号 | 描述 | 63110A | LED仿真负载500V/2A/100Wx2 channels | 63113A | LED仿真负载300V/20A/300W | 63115A | LED仿真负载600V/20A/300W | 6312A | 双负载模块外框 | 6314A | 四个负载模块外框 | A631000 | 6314A与6312A用GPIB控制适配卡 | A631003 | 6314A与6312A用GPIB控制适配卡 |
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