中國(guó)臺(tái)灣Chroma 6310A系列可編程直流電子負(fù)載?
6310A系列可編程直流電子負(fù)載?主要特色： - *的LED模式，可供LED driver測(cè)試
- 可編程的LED操作點(diǎn)阻抗(Rd)
- 可編程的內(nèi)部阻抗(Rr)，可應(yīng)用于模擬LED的漣波電流
- 快速響應(yīng)，可供PWM調(diào)光測(cè)試
- 一機(jī)框最多可達(dá)8個(gè)通道
- 二段式16位高精密電壓/電流量測(cè)線路
- 保護(hù)功能：過(guò)電壓、過(guò)電流、過(guò)功率、過(guò)溫度保護(hù)
LED driver為電流源，因此有一可輸出的電壓范圍及一固定的輸出電流。在LED driver的測(cè)試上，一般常使用的方式有下列幾種： 
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 | 由LED的V-I特性曲線中，可知LED有一順向偏壓VF及一導(dǎo)通電阻(Rd)。當(dāng)以真實(shí)電阻為負(fù)載，其V-I特型是一直線，并無(wú)法模擬LED的特性。尤其當(dāng)LED driver開(kāi)機(jī)電壓上升時(shí)，電流波形不同，可能會(huì)無(wú)法開(kāi)機(jī)。而傳統(tǒng)電子負(fù)載的CR及CV模式，都是以穩(wěn)態(tài)時(shí)的LED操作點(diǎn)為設(shè)定值，對(duì)開(kāi)關(guān)機(jī)或PWM調(diào)光動(dòng)態(tài)的特性，無(wú)法模擬，也可能導(dǎo)致LED driver產(chǎn)生不正常的動(dòng)作或保護(hù)。而若以LED來(lái)當(dāng)負(fù)載，雖能*測(cè)試LED driver。但卻有LED老化問(wèn)題，及LED driver不同的輸出電壓測(cè)試上，需串聯(lián)不同顆數(shù)的LED，如此將會(huì)造成測(cè)試上與生產(chǎn)上的不便。 |
致茂6310A series電子負(fù)載中的63110A新創(chuàng)了一個(gè)新的操作模式—LED模式，來(lái)模擬LED。使用者僅需透過(guò)設(shè)定LED driver的輸出電壓、電流，即可模擬LED的拉載特性。還可設(shè)定LED的操作點(diǎn)阻抗及高頻阻抗，讓拉載電流及高頻連波與更趨近于真實(shí)LED。對(duì)于PWM調(diào)光(Dimming)測(cè)試，63110A的全新設(shè)計(jì)中，亦增加了頻寬，讓使用者亦可透過(guò)電子負(fù)載完成動(dòng)態(tài)調(diào)光測(cè)試。 
圖2是以LED為負(fù)載所拉載的電流波形(藍(lán)色)；圖3為63110ALED 模式的拉載電流波形(藍(lán)色) ；由圖2與圖3可觀察到兩者于LED driver于開(kāi)機(jī)時(shí)的拉載電壓電流波形非常相似。圖4為測(cè)LED為負(fù)載在調(diào)光(Dimming)時(shí)的電流波形。圖5為63110A為負(fù)載在調(diào)光(Dimming)時(shí)的電流波形。
LED driver的輸出漣波電流可以透過(guò)調(diào)整63110A內(nèi)部電阻 (Rr) 來(lái)模擬。傳統(tǒng)電子負(fù)載無(wú)法模擬LED driver的輸出漣波電流，如圖6所示。圖7為L(zhǎng)ED當(dāng)負(fù)載時(shí)的漣波電流。圖8為63110A當(dāng)負(fù)載時(shí)的漣波電流。
圖9是以真實(shí)電阻為負(fù)載的拉載電流波形(藍(lán)色)；圖10為定電阻模式模擬真實(shí)電阻的拉載電流波形(藍(lán)色)；圖9與圖10的電流與LED為負(fù)載的電流波形有相當(dāng)大差異，且電流及電壓都有過(guò)沖的情況發(fā)生，易導(dǎo)致LED driver在開(kāi)機(jī)時(shí)發(fā)生過(guò)電壓或過(guò)電流保護(hù)，如圖11所示。因此不管是真實(shí)電阻或是電子負(fù)載的定電阻模式，都比較無(wú)法模擬真實(shí)的情況。
  中國(guó)臺(tái)灣Chroma 6310A系列可編程直流電子負(fù)載
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面板說(shuō)明
Model 6310A系列選型表 型號(hào) | 描述 | 63110A | LED仿真負(fù)載500V/2A/100Wx2 channels | 63113A | LED仿真負(fù)載300V/20A/300W | 63115A | LED仿真負(fù)載600V/20A/300W | 6312A | 雙負(fù)載模塊外框 | 6314A | 四個(gè)負(fù)載模塊外框 | A631000 | 6314A與6312A用GPIB控制適配卡 | A631003 | 6314A與6312A用GPIB控制適配卡 |
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