Atec 63113A User Manual

Programmable DC Electronic Load Model 63110A/63113A

KEY FEATURES

■ Unique LED mode for LED power driver test

■ Programmable LED operating resistance (Rd)

■ Programmable internal resistance (Rr) for

simulating LED ripple current

■ Fast response for PWM dimming test

■ Up to eight channels in one mainframe

■ 16-bit precision voltage and current

measurement with dual-range

■ Full Protection: OC, OP, OT protection and OV alarm

As a constant current source, the LED power driver has an outpu t v oltage range with a consta nt output current. LED power drivers are usually tested in one of the following ways :

1. With LEDs

2. Using resistors for loading

3. Using Electronic Loads in Constant Resistance (CR) mode, or Constant Voltage (CV) mode

Ch roma has cr eate d the in dus trie s firs t LED Load Simulator for simulating LED loading with our 63110A load model from our 6310A serie s Electronic Loads. By setting the LED power driver's output voltage, and current, the Electronic Load can simulate the LED’s loading characteristics. The LED’s forward voltage and operating resistance can also be set to further adjust the lo adi ng curre nt and rippl e cur ren t to bette r simulate LED characteristics. The 63110A design also has increased bandwidth to allow for PWM dimming testing.

Figure 2 shows the dimming current waveform of the LED. Figure 3 shows the dimming current waveform when using 63110A as a load.The 6314A holds up to four 63110A load modules, which will result in an 8-channel 100W/channel load with standard front-panel inputs. This makes it ideal for testing single output and multiple output LED driver. Add itionally, the GO/NG output por t is useful for UUT's pass/fail testing on an automated production line. All modules on the 6314A/6312A ma infram e sha re a com mon GPIB add ress to synchronize and speed up the control of the load modules and the read-back of data.

LED Curve

I Io

Figure 4 Simulate different number of LEDs

Figure 5 Simulate different characteristic of LEDs

d1 Rd2 Rd3 Rd4

o1 Vo2 Vo3 Vo4

d3 Rd2 Rd1

F1 VF2 VF3 Vo

Test Equipment

Equipment

Photovoltaic

Semiconductor/IC

LED

LCD/LCM

Video & Color

Optical Inspection

However, all these testing methods, each of them has their own disadvantages.

As shown on the V-I curve in Figure 1, the LED has a forward voltage VF and a operating resistance (Rd). Whe n using a resistor as loa ding, the V-I curve of the resistor is not able to simulate the V-I curve of the LED as shown on Figure 1. This may cause the LED power driver to not start up due to the difference in V-I characteristic between the resistors and the LEDs. When using Electronic Loads, the CR and CV mode settings are set for wh en the LED is un der sta ble oper ation and therefore, is unable to simulate turn on or PWM brightness control characteristics. This may cause the LED powe r driver to funct ion improper ly or trigger it's protection circuits. These testing requirements can be achieved when using a LEDs as a load; however, issues regarding the LED aging as well as different LED power drivers may require different types of LEDs or a number of LEDs. This makes it inconvenient for mass production testing.

Figure 1 LED V-I Characteristics

Figure 2 LED dimming test

6312A : 2 in 1 Mainframe

6314A : 4 in 1 Mainframe

Power Electronics

Test Equipment

Passive Component

Test Instruments

Electrical Safety

Test Instruments

General Purpose

Figure 3 63110A dimming test

• Continued on next page ➟

& Systems

11-12

PXI Instruments

11-13

All specifications are subject to change without notice. All specifications are subject to change without notice.

Programmable DC Electronic Load Model 63110A/63113A

SPECIFICATIONS

Model 63110A (100Wx2) 63113A *3

Power 100W 300W Current 0~0.6A 0~2A 0~5A 0~20A Voltage *1 0~500V 0~300V Min. Operating Voltage 6V@2A 4V@20A

LED Mode

Operation Voltage: 0~100V/0~500V

Rd Coeﬃcient : 0.001~1

Range

Resolution *2

Constant Resistance Mode

Range

Resolution*2

Accuracy

Constant Voltage Mode

Range 0~500V 0~300V Resolution 20mV 6mV Accuracy 0.05% + 0.1%F.S. 0.05% + 0.1%F.S.

Constant Current Mode

Range 0~0.6A 0~2A 0~5A 0~20A Resolution 12µA 40µA 100µA 400µA Accuracy 0.1%+0.1% F.S. 0.1%+0.1% F.S. 0.1%±0.2% F.S.

Measurement Section

Voltage Read Back Range 0~100V 0~500V 0~60V 0~300V Resolution 2mV 10mV 1.2mV 6mV Accuracy 0.025%+0.025% F.S. 0.025%+0.025% F.S. Current Read Back Range 0~0.6A 0~2A 0~5A 0~20A Resolution 12µA 40µA 100µA 400µA Accuracy 0.05%+0.05% F.S. 0.05%+0.05% F.S.

NOTE*1 : If the operating voltage exceeds 1.1 times of the rated voltage, it would cause permanent damage to the device. NOTE*2 : S (siemens) is the SI unit of conductance, equal to one reciprocal ohm. NOTE*3 : Call for availability

VF: 0~100V/0~500V

Current : 0~2A

Rd: 1Ω~1kΩ/10Ω~10kΩ

Vo : 4mV/20mV

Io : 0.1mA

Rd Coeﬃcient : 0.001

Rd : 62.5µs/6.25µs

VF : 4mV/20mV

CRL : 3Ω~1kΩ (100W/100V)

CRH : 10Ω~10kΩ (100W/500V)

CRL : 62.5µS

CRH : 6.25µS

1kΩ : 4mS+0.2%

10kΩ : 1mS+0.1%

Operating Voltage : 0~60V/0~300V

Rd Coeﬃcient : 0.001~1

VF : 0~60V/0~300V

LEDL @ CCH : 0~60V- 0~20A (Rd: 0.05Ω~50Ω)

LEDL @ CCL : 0~60V- 0~5A (Rd: 0.8Ω~800Ω)

LEDH @ CCL : 0~300V- 0~5A (Rd: 4Ω~4kΩ)

Vo : 1.2mV/6mV

Io : 100µA/400µA

Rd Coeﬃcient : 0.001

Rd : 400µs / 25µS / 5µS

VF : 1.2mV/ 6mV

CRL @ CCH : 0.2Ω~200Ω (300W/60V)

CRL @ CCL : 0.8Ω~800Ω (300W/60V)

CRH @ CCL : 4Ω~4kΩ (300W/300V)

CRL @ CCH : 100µS

CRL @ CCL : 25µS

CRH @ CCL : 5µS

200Ω : 0.2% (setting + range) 800Ω : 0.2% (setting + range)

4kΩ : 0.2% (setting + range)