model | ET3720 | ET3721 ET3728 | ET3722 ET3729 | ET3730 | ET3731 ET3738 | ET3732 ET3739 |
Maximum power | 105W (ET3720 , 3721 , 3722 three ) Or 155W ( ET3728 , 3729 ) | 195W (ET3720 , 3721 , 3722 three ) Or 305W ( ET3728 , 3729 ) |
Number of channels | 2 ( CH1 is variable, CH2 is fixed) | 3 ( CH1 , CH2 are variable, CH3 is fixed) |
DC output ( 0 °C -40°C) | Voltage /current (rated value) | CHl : 0 ~ 30V , 0 ~. 3A (ET3720 , 3721 , 3722 three ) Or CH1 : 0~30V , 0~ 5 A ( ET3728 , 3729 ) | CHl , the CH2 : 0 ~ 30V , 0 ~. 3A (ET3720 , 3721 ,3722 three ) Or CHl , the CH2 : 0 ~ 30V , 0 ~ . 5 A (ET3728 , 3729two ) |
Overpressure /overcurrent protection (maximum range) | CHl : 10mV ~ 33V , 10mA ~ 3.3A (ET3720 , 3721 , 3722three ) Or CH1 : 10mV~33V , 10mA~ 5 . 5 A ( ET3728 , 3729 ) | CHl , the CH2 : 10mV ~ 33V , 10mA ~ 3.3A (ET3720 ,3721 , 3722 three ) Or CHl , the CH2 : 10mV ~ 33V , 10mA ~ . 5 . . 5 A ( ET3728 , 3729 two) |
2.5V/3.3V/5V Fixed output | l Current output: 0 ~. 3A (ET3720 , 3721 , 3722 , 3730 is , 3731/3732 six ) , Or 0~ 1 A ( ET3728 , 3729 , 3738 , 3739 four) ; l Output accuracy: < 5% ; l Load adjustment: ≤ 15 words; l Linear adjustment: ≤ 5 words; l Ripple and noise ( 20Hz~7MHz ): ≤ 2mVrms ; l overload situation: 3A (ET3720 , 3721 , 3722 , 3730 , 3731/3732 six ) , Or 0~ 1 A ( ET3728 , 3729 , 3738 , 3739 four). (The parameters of the fixed file are listed in this table . The following parameters are applicable to the voltage variable) |
Linear adjustment rate ( ± output percentage + word count ) |
Voltage | ≤ 0.01 % +2 | ≤ 0.01 % +2 | ≤ 0.005 % +2 | ≤ 0.01 % +2 | ≤ 0.01 % +2 | ≤ 0.005 % +2 |
Current | ≤ 0.1 % +3 | ≤ 0.01 % +3 | ≤ 0.005 % +3 | ≤ 0.1 % +3 | ≤ 0.01 % +3 | ≤ 0.005 % +3 |
Load adjustment rate ( ±output percentage + word count ) |
Voltage | ≤ 0.01 % +2 | ≤ 0.01 % +2 | ≤ 0.00 6 % +2 | ≤ 0.01 % +2 | ≤ 0.01 % +2 | ≤ 0.006 % +2 |
Current | ≤ 0.1 % +3 | ≤ 0.05 % +3 | ≤ 0.01 % +3 | ≤ 0.1 % +3 | ≤ 0.05 % +3 | ≤ 0.01 % +3 |
Tracking operation ( ±output percentage + word count ) |
Tracking error | / | ≤ 0.5 % +10 of Master (no load) |
Parallel adjustment rate | Linear | / | ≤ 0.01 % +5 |
load | / | ≤ 0.01 % +5 |
Series adjustment rate | Linear | / | ≤ 0.01 % +10 |
load | / | ≤ 0.02 % +10 |
Ripple and noise ( 20Hz-7MHz ) |
Voltage | ≤ 1.5mVrms | ≤ 1mVrms | ≤ 60 0 μ Vrms | ≤ 1.5mVrms | ≤ 1mVrms | ≤ 60 0 μ Vrms |
Current | ≤ 2mArms | ≤ 1.5mArms | ≤ 1mArms | ≤ 2mArms | ≤ 1.5mArms | ≤ 1mArms |
Programming / readback resolution |
Voltage | 10mV | 1mV | 1mV | 10mV | 1mV | 1mV |
Current | 1mA | 1mA | 1mA | 1mA | 1mA | 1mA |
Programming / readback accuracy (± output percentage + word count) |
program | Voltage | 0.4 % +2 | 0.03 % +10 | 0.02 % +5 | 0.4 % +2 | 0.03 % +10 | 0.02 % +5 |
Current | 0.4 % + 10 | 0.3 % +10 | 0.3 % +5 | 0.4 % + 10 | 0.3 % +10 | 0.3 % +5 |
Read back | Voltage | 0.4 % +2 | 0.03 % +10 | 0.03 % +5 | 0.4 % +2 | 0.03 % +10 | 0.03 % +5 |
Current | 0.4 % + 10 | 0.3 % +10 | 0.2 % +5 | 0.4 % + 10 | 0.3 % +10 | 0.2 % +5 |
Load transient response time |
Output current recovery from full load to half load or full load to the half load, the output voltage 15mV time within less than 50 [mu] S . |
Stability (± output percentage + word count) |
Voltage | 0.02%+10 | 0.02%+10 |
Current | 0.1% +1 | 0.1% +1 |
Temperature coefficient (± output percentage + word count) |
Voltage | 0.02%+10 | 0.02%+10 |
Current | 0.02%+10 | 0.02%+10 |
other |
Command processing time | < 200ms |
cooling method | Fan cooling |