PCM-7140 1A Pulsed Current Source
Precision Pulse Control
The PCM-7140 is a compact pulsed current source designed to drive laser diodes, bars, arrays, or any lowimpedance load. The key specifications are output current from 0.1 A to 1 A, rise and fall times below 1 µs at 1 A, pulse widths from 1 µs to 100% duty cycle, pulse repetition rates from single shot to 100 KHz, and forward voltage from 0 V to 60 V.
System Operation
The PCM-7140 output current may be set with an internal potentiometer or an external analog voltage. The pulse width and frequency is controlled with an external trigger source. The system requires two DC power supplies for operation: 12 VDC for housekeeping and a high voltage power supply with voltage ≤ 10 VDC above the laser diode’s forward voltage.
Input / Output Cable
The laser or load is connected to the PCM-7140 with a 100 cm length of 18 AWG twisted pair cable (included). This same cable has the DC input connection from the high voltage power supply.
Liquid Cooling
The PCM-7140 module is liquid cooled with a liquid temperature of 11 °C to 22 °C with a flow rate of 6 liters per minute. The connection type is 3/8” tubing.
Ordering Information
PCM-7140
PCM-7140 Pulser
DC Input / Output Cable
Load Board
Control Board
Control Signal Cable
Pulse Amplitude
Output current range
0.1 A to 1.0 A
Setpoint accuracy
±1 % of full-scale current
Current overshoot
≤ 1 % : 0.100 A to 0.499 A
≤ 5 % : 0.500 A to 1.0 A
Current rise/fall time
≤ 5 µs : 0.1 A to 0.499 A
≤ 2 µs : 0.500 A to 1.0 A
Trigger (J3-Pin 6)
Frequency range
≤ 100 kHz
100% Duty Cycle
≤ 1.0 A * High Voltage = VForward + 5 V
Input voltage levels
0 V, output off
5 V, output on
Termination impedance
50 Ω
Trigger pulse width
1 µs to 100% duty cycle
Delay (external to output)
≤ 1µs (typical)
Current Setpoint Control (J3-Pin 4)
Input voltage levels
5 V or open: internal potentiometer control
0 V: external control
Termination impedance
9,000 Ω
Response time on change
≤ 0.5 µs
Analog Current Setpoint (J3-Pin 5)
Input voltage levels
0 V to 2.048 V
0.000 V: 0 A output
2.000 V: 1.0 A output
Termination impedance
>19 kΩ
Response time on change
≤ 0.5 µs
Current Monitor (J2)
Current monitor
0 V to 0.200 V
1.0 A output current:
0.165 V (typical)
Current monitor termination
50 Ω
Current monitorconnector
SMB
Control Signal Connector (J3)
Connector
Molex #70553-0110
Pin 1: 12 V DC
Pin 2: Return
Pin 3: Return
Pin 4: Current setpoint control
Pin 5: Analog current setpoint
Pin 6: Trigger
Liquid Cooling
Input Temperature
11 °C to 22 °C
Flow Rate
6 liters/minute
Connection
3/8” tubing, McMaster-Carr # 9336T2
12 V Power Specifications (J3-Pin 1)
Voltage requirements
12 V DC ± 5%
Current requirements
0.100 A
DC Input / Output Connector (J1)
Connector
TE AMP Connector 1-770974-0
Output +
Pins 1, 2, 3, 4
Output –
Pins 9, 10, 11, 12
DC Input +
Pins 13, 14, 15, 16
DC Return
Pins 5, 6, 7, 8
DC Input Power Specifications
High voltage range
0 V DC to 75 V DC (Max) (load +10 V)
Current requirements
1.2 A
Output Current High Voltage requirements
0 A to 1.0 A
Forward voltage + 10 V DC ± 5%*1
0 A to 1.0 A
100% Duty Cycle VForward +5 V DC
*1 Operation of instrument outside of this voltage can cause permanent damage to the instrument and/or load. Do not exceed 75 V DC.
General
Size (HxWxD)
8.3 cm x 11.0 cm x 13.75 cm
Weight
0.635 kg
Mounting screw size
6-32
Mounting hole placement l
See Manua
Operating temperature
10°C to 40°C
Cooling
Liquid cooled
Notes
Warranty: One year parts and labor on defects in materials and workmanship.
The PCM-7140 current source meets or exceeds these specifications.
All specifications are measured with 100 cm of 18 AWG twisted pair wire connecting the PCM-7140 to a low impedance/inductance load(HPL-2400-2.653).
Specifications subject to change without notice.
Control Board Load Board
Safe Operating Area Graphs
描述 [描述] PCM-7140是一种紧凑的脉冲电流源,设计用于驱动激光二极管、棒、阵列或任何低阻抗负载。