PA120A

High Speed Power Amplifier

Bandwidth: DC-1.5MHz
Slew-Rate: 250V/µs
Load current: > 10A_P
Offset: < 3mV
Sophisticated limiting and protection concept

Applications:

Research
Development (in particular power electronics)
Pulse physics
Component testing
Quality assurance
Measurement and test engineering

PA120A is a high speed DC-coupled power amplifier featuring power bandwidth of 1.5MHz.

The output stage of PA120A provides output voltages ranging from -30V to +30V, whereas load currents of ±4A and peak load currents up to ±10A are available.

The amplifier comes with two input channels; their signals are added together. This allows e.g. for providing an AC-signal with a DC-offset. Another example would be superimposing of the wanted signal by a disturbing signal. Input resistance (50Ω / 10kΩ) as well as coupling mode (AC / GND / DC) and gain (x1 / x10) can be set for each input channel separately.

LED indicators at the inputs (LIMIT + / LIMIT -) signalise overmodulation of the input stage.

The power output stage is protected against overload and overtemperature.
The supply voltage of the output stage is varied depending on junction temperature of its transistors (Tj LIMIT + / Tj LIMIT -). This method allows for achieving high output currents even at small output voltages.

Monitoring of the junction temperature also makes a fast current limitation unnecessary, thus allowing for very high peak output currents (> 10A). If either the junction temperature exceeds 125°C (Tj OVER) or the maximum heatsink temperature is exceeded (Ths OVER), the output of the amplifier will be disconnected.

If the output voltage level exceeds its positive or negative limit, the appropriate output limit indicator LED lights up (LIMIT + / LIMIT -). The output voltage will be then reduced, preventing overmodulation of the power output stage.

Technical Specifications:

Parameter	Symbol	Min	Typ	Max	Unit	Comment

Absolut maximum ratings:
Input voltage (R_I 10kΩ)	V_I10	-90		+90	V_P
Input voltage (R_I 50Ω)	V_I50		15		V_RMS

Electrical characteristics:
Input voltage	V_I10-1	-30		+30	V_P
(R_I 10kΩ, GAIN x1)
Input voltage	V_I10-10	-3		+3	V_P
(R_I 10kΩ, GAIN x10)
Input voltage	V_I50-1	-30		+30	V_P	max. 15V_RMS !!
(R_I 50Ω, GAIN x1)
Input voltage	V_I50-10	-3		+3	V_P
(R_I 50Ω, GAIN x10)
Lower limiting frequency AC	f (-3dB)		15		Hz

Output voltage	V_O	-30		+30	V_P	R_L≥7.5Ω, f≥10kHz
Load current	I_ODC	2	2.2		A	f=0Hz
Load current	I_OAC	4	4.5		A_P	f≥10kHz, square
Load current	I_OAC	6.3	7		A_P	f≥10kHz, sine
Pulsed load current	I_OP	10	20		A_P	t_P≤20µs, D≤0,2

Output resistance	R_O		0.1		Ω
Output resistance Monitor Out	R_OM		51		Ω

Frequency response	f (-3dB)		0…1.5		MHz	R_L=50Ω
Frequency response BW-LIMIT	f (-3dB)		0…300		kHz	R_L=50Ω
Slew-Rate	SR	200	250		V/µs	R_L=50Ω

Output offset voltage	ΔV_OO	-3	1.5	+3	mV

Mains voltage	V_LINE	207	230	253	V_AC
Mains frequency	f_LINE	45	50	65	Hz
Power consumption	P_LINE	25		300	W
Input current	I_LINE			1.6	A
Mains fuse				T3.15A		UL 248

Ambient temperature (operation)	T_AMB	0	20	35	°C
Storage temperature	T_S	-25		+85	°C

Width	W		470		mm
Height	H		153		mm
Depth	D		300		mm
Weight	m		10.5		kg

Disclaimer

The information given here is technical data, not assured product characteristics. It has been carefully checked and is believed to be accurate; however, no responsibility is assumed for inaccuracies. The user has to ensure by adequate tests that the product is suitable for his application regarding safety and technical aspects.
hivolt.de GmbH & Co. KG does not assume any liability arising out of the application or use of any product described.

Safety Advice

Design, installation and inspection of machinery and devices carrying high voltage require accordingly trained and qualified personnel. Appropriate safety rules and directives must be complied with.
Improper handling of high voltage can mean severe injuries or death and may cause serious collateral damage!