Supertex inc. HV264DB1 Quad, High Voltage Amplifier Array Demo Board General Description The Supertex HV264TS-G is a quad high voltage amplifier array device in a 24-pin TSSOP package. The HV264DB1 demo board provides a platform to evaluate this device. This demoboard requires only a minimum setup including a VDD low voltage supply, a VPP high voltage supply, and a signal source. The demoboard provides the input/output connections through two 6-pin headers. For detailed electrical performance, please refer to the HV264 datasheet. Specifications Parameter Value VPP high voltage supply 200V VDD low voltage supply HVOUT output voltage swing 4.5 to 5.5V 1.0V to VPP - 10V VIN Input signal range AV closed loop gain 0 to VDD - 1.5V 66.7V/V with internal feedback resistors Typical SR output slew rate 9.0V/µs IPEAK output peak current 3.0mA Board Layout Pin Name Description VPP High voltage positive supply VDD Low voltage positive supply IN1 to IN4 HVOUT1 to HVOUT4 GND Amplifier inputs Amplifier outputs Device ground Power Up/Down Sequence The device can be damaged due to an improper power up / down sequence. To prevent damage, please follow the acceptable power up / down sequences. An external diode across VPP and VDD in included on the board, where the anode of the diode is connected to VDD and the cathode is connected to VPP. Any low current high voltage diode will be adequate. Doc.# DSDB-HV264DB1 NR060613 Acceptable Power Up Sequences 1) VDD 2) VPP 3) Inputs 1) VDD 2) Inputs 3) VPP Acceptable Power Down Sequences 1) Inputs, 2) VPP) VDD 1) VPP) Inputs) VDD Gain Setting The HV264 quad amplifier array has the internal built-in gain setting resistors available with a fixed gain of 66.7V/V +/- 5%. External gain setting resistors can be used for applications that require better tolerance or a different closed loop gain. An example is shown in the following schematics. Fig. 1 shows the schematics of the demoboard. The external resistor values and tolerances can be selected to meet different gain setting and precision requirements as shown in Fig. 2. Supertex inc. www.supertex.com HV264DB1 Schematics C1 VDD VPP D1 6 HV264 VIN1 C1 + 65.7R HV264 VOUT1 23 FB1 22 RGND1 3 VOUT2 21 65.7R FB2 20 R RGND2 5 + VOUT3 65.7R FB3 16 R 4 + VOUT4 15 FB4 14 RGND4 11 65.7R R GND HVGND 7 + R R2 8 VIN3 22 3 VOUT2 21 FB2 20 RGND2 + 5 VOUT3 17 FB3 16 - R11 0 R RGND3 10 HVOUT4 VIN4 + 9 VOUT4 15 FB4 14 RGND4 11 - R12 0 R 0 GND 18 7 Fig. 1. Demo Board Resistor Settings +1 R9 R5 0Ω R1 HVOUT2 = IN2 R10 R2 +1 R6 0Ω R2 HVOUT3 = IN3 R11 R3 +1 R7 0Ω R3 HVOUT4 = IN4 R12 R4 +1 R12 65.7R R4 R9 R1 R11 65.7R R3 R8 NA FB1 HVOUT1 = IN1 R10 65.7R HVOUT3 9 23 - 0 VIN4 VIN2 R10 0 R6 NA VOUT1 RGND1 R1 R7 NA R RGND3 + 65.7R HVOUT2 17 - 10 R5 NA VPP - 0 VIN3 VIN1 R9 0 0 + - 8 2 HVOUT1 C2 19 VDD R VIN2 VPP D1 6 VPP - 4 VDD 19 VDD 2 C2 R8 0Ω R4 HVGND 18 Fig. 2. High Precision Gain Settings Using External Resistors Bill of Materials Item RefDes Description Package Manufacturer Part # 1 C1 0.1µF +/-10%, 25V X7R chip capacitor 0805 Any --- 2 C2 1.0nF +/-10%, 250V X7R chip capacitor 0805 Any --- 3 D1 400V, 1.0A, general purpose diode SMA Any USIG 4 R1 ,R2, R3, R4, R9, R10, R11, R12 0Ω chip resistors 0805 Any --- 5 R5, R6, R7, R8 chip resistors (not installed) 0805 Any --- 6 U1 225V, 3.0mA amplifier array 24-pin TSSOP Supertex HV264TS-G Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) Supertex inc. ©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSDB-HV264DB1 NR060613 2 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com