Q-switch Driver (RF Driver)

Q-switch drivers are used to drive Q-switches and their frequencies are mainly 24, 27, 41, 68, 80MHz etc.

1. High Power Q-switch Drivers (20W and above)

1.1 QSD Series RF Drivers (20W, 50W, 75W & 100W)

A high power RF driver module is available in output powers of 50W, 75W or 100W. Powered from 220VAC or 110VAC, the modulation inputs allow either full digital control or activation of an internal pulse generator. First pulse suppression is automatically implemented.

Main Specifications:

• RF power output : 50W, 75W or 100W

• Frequency: 27.125MHz

• VSWR: ≤1.2

• Modulation repetition rate: 800Hz-50kHz

• First pulse suppression

• Modulation control inputs: digital TTL , till 100kHz

• Driver over-heat, Q-Switch over-heat

• Internal over-temperature protection and over-current protection

• Digital display of frequency

• Supply voltage input: 220VAC/110VAC, <150W

• Dimension: 483x88x308mm

• Weight: 8kg

Model Numbers: QSDxxyyZ

• QSD - QSD series RF driver

• XX - RF frequency, 27-27MHz, 24-24MHz

• YY - RF output power (W), 50-50W, 75-75W

• Z - others, Z or T

Example QSD-2720T (20W), QSD-2750T (50W), QSD-2775T (75W) or QSD-27100Z (100W)

Main Features of QSDxxyyT Series Digital Q-switch Drivers:

Newly designed digital RF driver has the following features comparing with analog version:

• Touch panel,

• Digital circuit to improve control accuracy with frequency resolution of 0.01Hz (0.001Hz or less upon request)

• Internal trigger synchronizing with laser, to achieve perfect marking

• Integrated open load protection

• Easier and more accurate panel controlled laser delay.

Other power levels are available upon request.

2. Low Power Q-switch Drivers (<25W)

2.1. SQDR Series Q-switch Drivers (low power, compact Q-switch Driver, 2-24W)

SQDRxxx-yyDC-zzz-aaa series RF drivers are similar to QC0xx-yyDC-zzz drivers but cheaper.

xxx is operation frequency (xxx=041 means 40.68MHz and xxx=080 means 80MHz), yy is maximum output RF power (yy=20 means 20W), D means digital modulation, C means compact size, zzz means operation mode (FPS, PPK, A05 or A05, FPS is default. For more information), aaa is input voltage (aaa=15V means input voltage is 15VDC).

The outline dimension is 95x70x25mm.

2.2 SQDM Series Q-switch Drivers (low power, compact Q-switch Driver, 2-24W)

SQDMxxx-yyW-aaV-zzz series RF drivers are similar to QCxxx-yyDC-zzz drivers but cheaper. Their outlines are similar too.

xxx is operation frequency in MHz (xxx=041 means 40.68MHz and xxx=080 means 80MHz), yy is maximum output RF power (yy=20 means 20W), aa means input voltage (aa=15 means 15VDC input, zzz means operation mode (FPS, PPK, RPS or APS, PPK is default. For more information). For example, SQDM041-20W-15V-PPK means operation frequency 40.68MHz, output RF power 20W, input voltage 15V and operation mode PPK.. The outline dimensions are 95x70x25mm.

2.3 STL Series Q-switch Driver (80MHz, 15W)

2.4 STZ Series Q-switch Driver, 20W, 41MHz & 80MHz

There are 5 potential meters to change the settings as follows:

• Prf: setting the RF output power

• Pulse Width: setting the pulse width of TTL_Fixed selection with the range  0.8us~25us±10%

• FPS Window: FPS window time and its range is 20us~350us±10%

• FPS Slope: setting the FPS slope

• FPS Start：setting FPS starting point

There are 13 RF output modes as follows:

Technical Specifications:

• Input electricity: 15～24VDC, ripple £100mV

• FPS, TTL_Fixed, TTL_Varibale input resistance 10kΩ±10%

• ANALOGinput resistance 10kΩ±10%

• FPS, TTL_Fixed, TTL_Varibale low level -0.5~0.8V, high level 2.5~5V

• ANALOG input voltage 0～5V

• FPS’s input width 1～350uS

• TTL_Fixed input range 50ns, period -500ns

• TTL_Variable effective input range 500ns, period -500ns

• TTL_Fixed output range 0.8us~25us±10%, determined by Pulse Width potential meter

• Shortest RF operation time 500ns

• Shortest lasing time 500ns

• RF fall time <20ns

• FPS window range 20～350us±10%

• Max. RF output Pmax=20W±10%, max. input electrical power 45W±10%

• Adjustable output RF power range 0～Pmax, determined by Prf potential meter

• Outline dimension: 100x70x25mm

Part numbers: STZxxx-yyD-zzz

• XXX: RF operation frequency, xx=041(40.68MHz) or =80(80MHz)

• YY: output RF power (yy=2-20, W)。

• ZZZ: first pulse suppression mode (zzz=FPS, TTLF or TTLV)

• D: D means digital input modulation, A means analog input modulation