BAP-1106 SCR Gate Drive Board

The AP-1106 provides a complete, field-tested turnkey solution to drive a single large area thyristor device. This driver accepts a logic level control input and provides an isolated DC drive current into the SCR gate, able to hard drive up to 100mm size devices. The output gate drive signal is applied thru a pulse forming network that creates a fast rising leading edge current pulse (typically 5A/µSec) into the SCR gate, maximizing the device di/dt capability and insuring proper SCR turn on. The on board 115VAC power supply provides all needed power to drive the SCR and provides transformer isolation between the AC input and the SCR being driven. A high speed optocoupler provides isolation between the customer supplied logic level signal and the SCR. LED indicators display POWER ON and SCR ON status. The small footprint PCB assembly measures only 3.0” X 5.0”.

Circuit Diagram

Electircal Specifications

Absolute Maximum Ratings, Ta = 25°C unless otherwise specified
Parameter		Typical	Max	Min
T_OP - Operating Temperature	(°C)	-	70	-10
T_OS - Storage Temperature	(°C)	-	85	-20
V_ISO - Electrical Isolation	(VRMS for 1 min.)	-	2500	-

Electrical Characteristics, Ta = 25°C unless otherwise specified
Parameter		Typical	Max	Min
V_CTL – Input Control Voltage	(Volts DC)	12	24	10
I_CTL – Input Control Current	(mA)	20	40	16
V_GATE – Open Circuit GATE Voltage	(Volts DC)	16
I_GATE – Continuous Output GATE Current	(mA)	500
I_GPK – Peak Output GATE Current	(Amperes)	8
T_P – Propagation Delay Time	(µSec)	1
a – Duty Cycle	(%)		Continuous

J1 – INPUT POWER
Pin No.	Signal Name	Function
1	AC HOT	115 VAC-L1 Input – 2A Fuse on board
2	AC NEUTRAL	115 VAC-L2 Input
3	AC CHASSIS GND	115 VAC Chassis Ground

J2 – SCR DRIVE OUTPUT
Pin No.	Signal Name	Function
1	SCR-GATE	GATE Drive Current High
2	SCR-CATHODE	GATE Drive Current Return

J3 - CONTROL INPUT
Pin No.	Signal Name	Function
1	CTL (+)	SCR Control Signal (0V = Off / 12V = On)
2	CTL RET (-)	SCR Control Return

Mechanical Outline

Mating Connectors:

• J1 - 640427-3
• J2 - 640427-2
• J3 - 640427-2
• AMP MTA.156” IDC Conn. or equivalent

Maximum Board Height:

• 1.5”

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