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DTL Series
Features
0-10V Input/control voltage
0-50A output/load current
0.6-30V output compliance voltage
0-100W output/load power
4 M Input Impedance
500Vdc Isolation
�1% accuracy under all conditions
100�sec full-scale step response
2A/�sec slew rate
2" x 2", open-frame with baseplate
package
Operate in parallel for higher power
Applications
Power-supply test and characterization
Static/dynamic power-supply burn-in
Power-resistor substitution
Real-time load simulation
Capacitor discharge testing
The DTL32A-LC is an isolated (500Vdc), near-ideal (Zin >= 4M), analog/voltage-controlled
current sink. It's 0-50A ouput/load current is straightforwardly "programmed" by applying a 0-10V
input. The control signal can be generated by circuits as simple as the wiper of a trimpot or as
sophisticated as programmable logic controllers (PLC's) or analog-output computer I/O boards (D/A
boards). The DTL32A-LC supports any combination of I
OUT
= 0-50 Amps and V
OUT
= 0.6-30 Volts.
Its thermally efficient, metal package, when properly heat sunk, can dissipate output/load power up
to 100 Watts.
The easy-to-use DTL32A-LC is an excellent building block for low-cost, fully flexible,
power-supply (AC/DC or DC/DC) or power-component (MOSFET's, diodes, etc.) test and burn-in
applications. It is accurate (�5mA offset error, �1% overall accuracy), fast (100�sec full-scale step
response), and capable of impressive resolution. If it is controlled with a 12-bit, 0-10V D/A converter,
for example, one LSB (least significant bit) of the D/A corresponds to a 12.5mA change in the
DTL32A-LC's output/load current.
The DTL32A-LC is packaged in a small (2" x 2" x 0.5"), thermally efficient open-frame package
incorporating an aluminum baseplate with through-hole mounting inserts. It is powered by a single
+5V supply and draws a mere 150mA.
The DTL32A-LC has an output compliance voltage of 0.6-30 Volts. Should the output/load
voltage drop below the 0.6V required for proper biasing, an internal monitoring circuit activates the
DTL32A-LC's output Fault line.
The DTL32A-LC and other electronic loads, controller boards, and software from DATEL
are outstanding building-block components for power-supply burn-in and test systems. They are
extremely reliable, cost-effective solutions that enable you to quickly configure impressively accurate
systems.
INNOVATION and EX C ELL E N C E
�
�
DTL Series
DTL32A-LC Model



Voltage-Controlled, 50 Amp
100 Watt, Low-Compliance
Electronic Loads
DATEL, Inc. Mansfield, MA 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 Email: sales@datel.com Internet: www.datel.com
Figure 1. Simplified Schematic
Preliminary 22A
22A
DTL
I/O Connections
Pin Function P51 Pin Function P51
1 +5 Volt Supply 6 -Load
2 +5 Volt Return 7 -Load
3 Fault 8 +Load
4 Control Voltage In (+) 9 +Load
5 Control Voltage In (-)
Control Input Compliance
Voltage Impedance Current Resolution Voltage Power Package
Model (Volts) (Minimum) (Amps) (mA) (Volts) (Watts) (Case, Pinout)
DTL32A-LC 0 to +10V 4M 0-50 12.5 0.6-30 0-100 C24B, P51
Performance Specifications and Ordering Guide
M E C H A N I C A L S P E C I F I C A T I O N S
TEMPERATURE DERATING
Output P
o
wer/Load (W
atts)
Baseplate Temperature (�C)
The horizontal axis of the above chart references the temperature of the DTL32A-LC's
aluminum baseplate. The device can continually dissipate up to 100 Watts if the baseplate
is maintained at or below +50�C. At +25�C ambient temperature, with no heat sink or
supplemenatal air flow, the DTL32A-LC can reliably dissipate a continuous 10 Watts.

Voltage Range
32 = 0.6 to 30V
DATEL
Electronic Load
A-Series
High Reliability
PART NUMBER STRUCTURE
Typical at T
A
= +25�C with nominal +5V supply voltage, unless noted.
Listed resolution (12.5mA) is for a typical application in which the DTL32A-LC is controlled by a voltage
generated by a 12-bit D/A converter with a 0-10V output range. One LSB (least significant bit) of the D/A
corresponds to 0.0244% (1/4096) of full scale (50 Amps), which equals approximately 12.5mA.
For proper operation, the unit's output/load voltage must remain within this range. Voltages greater than the listed
maximum can damage the device. Voltages less than the minimum provide insufficient bias for the output stage and will
result in unpredictable or no operation. See Output Compliance Voltage and the Fault Line for details.
Baseplate Temperature (�C)
DTL Series
100 WATT, VOLTAGE-CONTROLLED ELECTRONIC LOAD
Output
Output
Input
DTL
32
2
A
Contact DATEL for Heat Sink information.
22A
-LC
Low Compliance
Voltage Operating Tem
Input
Control Voltage 0-10 Volts
Impedance 4 M, minimum
Output
Transfer Function I
OUT
(Amps) =
5 V
IN
(Volts)
Current:

Range 0-50 Amps
Resolution 0.025%FS (12.5 mA)

Offset Error �5 mA

Offset Tempco �1 mA/�C maximum

Gain Error �1%, maximum

Gain Tempco �100 ppm/�C typical
Absolute Accuracy �1%, maximum
Voltage 0.6-30 Volts
Power 0-100 Watts
Isolation Voltage:
Analog Input to � Load 500Vdc, minimum

+5V Power to Input or � Load 500Vdc, minimum
Any pin to case 500Vdc, minimum
Isolation Resistance 100M, minimum
Fault Logic Levels:
Logic "1" (@150�A) +3.5 Volts, minimum
Logic "0" (@1.6 mA) +0.4 Volts, maximum
Dynamic Performance
Output Slew Rate:
2.0 A/�sec, minimum
Output Settling Time
100 �sec
Dynamic Loading:

10mA to 50A 5 kHz

20A to 45A 10 kHz

0 to 50A 1 kHz
Power Requirements
Power Supply Range (+Vcc, Pin1)
+4.75-5.25 Volts (+5V nominal)
Power Supply Current
110mA typ., 150mA max.
Environmental
Operating Temperature
-25 to +70�C
Storage Temperature
-40 to +85�C
Humidity (Non-condensing)
to 95%
Altitude Above Sea Level
10,000 feet
Physical
Dimensions
2" x 2" x 0.5" (51 x 51 x 12.7 mm)
Case Material Open-frame construction with
aluminum baseplate
Pin Material Brass, solder coated
Mounting Holes Through-hole spacers, #4-40 clearance
Weight 1.9 ounces (54 grams)

Power Supply Voltage (+Vcc, Pin 1) -0.5 to +5.5 Volts
Control Voltage In (Pin 4) -0.5 to +15 Volts
Output Reverse-Polarity Protection No protection
Output Overvoltage Protection No protection
Output Undervoltage Protection Yes (See Fault Line)
Case Temperature +85�C
Storage Temperature 40 to +85�C
Lead Temperature (soldering, 10 sec.) +300�C
These are stress ratings. Exposure of devices to any of these conditions may adversely affect long-term
reliability. Proper operation under conditions other than those listed in the Performance/Functional
Specifications Table is not implied.
Absolute Maximum Ratings
Listed resolution (12.5mA) is for a typical application in which the DTL32A-LC is controlled by
a voltage gene