ANALOG DEVICES LTC7067 150V Dual High Side Mosfet Gate Driver User Guide

ANALOG DEVICES LTC7067 150V Dual High Side Mosfet Gate Driver

Product Information

Specifications

• Product Name: EVAL-LTC7067-AZ
• Product Type : 150V Dual High-Side MOSFET Gate Driver
• Package Type: 12-pin MSE
• Features:
  • Overvoltage and undervoltage protections

Product Usage Instructions

Quick Start Procedure

1. Connect the EVAL-LTC7067-AZ to the test setup as shown in Figure 1.
2. Adjust the frequency/duty cycle of G1IN/G2IN to expect the corresponding change of G1/G2.

Test with Default Load Capacitor
The board is set up with default load capacitors C5 and C6 to test the driver LTC7067. The typical value of these capacitors is 3.3nF. Refer to Figure 2 and Figure 3 for typical waveforms of rising/falling time and propagation delays.

Test in Non-synchronous Step-down Converter
To test the EVAL-LTC7067-AZ in a non-synchronous step-down converter, follow these steps:

1. Set up the test with a buck converter as shown in Figure 8.

Test in Non-synchronous Step-up Converter
To configure the EVAL-LTC7067-AZ as a simple open-loop non-synchronous boost converter, follow these steps:

1. Populate Q2, D2 on the board.
2. Populate the inductor from VIN to Q2 drain.
3. Set the corresponding duty cycle and frequency of G2IN.
4. Choose the output capacitors, switching frequency, duty cycle, and sinking current by design.
5. VOUT2 is the output.
6. To test EVAL-LTC7067-AZ in a boost configuration, connect another power supply to VIN_OPT and GND. Choose input capacitors by design.

General Description

The EVAL-LTC7067-AZ features the LTC®7067 in a flexible configuration as a non-synchronous step-down or as a non-synchronous step-up converter. EVAL- LTC7067-AZ also has a default set up to test LTC7067 only with a load capacitor. As both Gate returns are floating, LTC7067 can be configured to drive dual-high side MOSFET, or to drive high-side and low-side MOSFET. Typical performance is shown in Table 1.

This demo board features LTC7067, 150V Dual high-side MOSFET gate driver with overvoltage and undervoltage protections in a 12-pin MSE package. Refer to the LTC7067 data sheet for more detailed information.

Evaluation Circuit Photo

Table 1. Performance Summary (TA = 25˚C)

Propagation delay

| Rising| 19| ****

ns

Falling| 21
Rise Time| VCC = 10V, CLOAD = 3.3nF| 17| ns
Fall Time| 15| ns

Quick Start Procedure

Caution : Do not turn on the power supply until all connections are completed.

• Connect the power supply to VCC and GND.
• Connect one signal generator output to G1IN and GND, another to G2IN and GND. G1 and G2 can be tested altogether or separately.
• Turn on the power supply and adjust it to 10V.
• Adjust the signal generator to a pulse waveform of 50% duty cycle, 0-5V, 200kHz, turn on the signal generator.
• Connect the probes of an oscilloscope to G1/G2 and GND, G1IN/G2IN and GND for waveforms measurement.
• Verify the G1/G2 amplitude is 9.6V and follow the G1IN/G2IN inputs duty cycle and frequency. Adjust the frequency/duty cycle of G1IN/G2IN, expect the corresponding change of G1/G2.

Test with Default Load Capacitor
The board has a default set up to test the driver LTC7067 with load capacitors C5 and C6. The typical value of these capacitors are 3.3nF. Typical waveforms of rising/falling time, propagation delays are below.

Test in Non-synchronous Step-down Converter
The EVAL-LTC7067-AZ can be configured as a simple open-loop non-synchronous buck converter. To set up, populate Q1, D3, and cut the copper on D3 to isolate the cathode of D3 from GND, Q1 will be the control MOSFET of buck, and D3 will conduct the freewheeling inductor current when Q1 is off. Set the corresponding duty cycle and frequency of G1IN, populate inductor across Q1 source to VOUT1, and simply short VIN_OPT to Q1 drain. Choose the output capacitors, switching frequency, duty cycle, and sinking current by design. VOUT1 is the output. VIN_OPT is the input, to test EVAL-LTC7067-AZ in a buck configuration, another power supply connected to VIN_OPT and GND is needed, choose input capacitors by design. Note that the G1_RTN will see VIN_OPT voltage and G1VCC will see VIN_OPT+VCC-VDIODE, where VDIODE is the forward voltage drop of D6, both G1RTN and G1VCC shouldn’t exceed 150V.

Test in Non-synchronous Step-up Converter
The EVAL-LTC7067-AZ can be configured as a simple open-loop non-synchronous boost converter. To set up, populate Q2, D2. Populate inductor from VIN to Q2 drain. Set the corresponding duty cycle and frequency of G2IN. Choose the output capacitors, switching frequency, duty cycle, and sinking current by design. VOUT2 is the output. VIN_OPT is the input, to test EVAL-LTC7067-AZ in a boost configuration, another power supply connected to VIN_OPT and GND is needed, choose input capacitors by design.

FAULT
FAULT is an open drain output of an internal N-channel MOSFET, there is a pull-up resistor from FAULT to VCC on board. FAULT will be pulled low during VCC UVLO/OVLO, typical VCC UVLO voltage is 4.3V, VCC OVLO voltage is 14.6V, or over temperature (180˚C). After all the faults are cleared, FAULT will be pulled up to VCC.

EVAL-LTC7067-AZ Bill of Materials

ITEM| QTY| DESIGNATOR| DESCRIPTION| MANUFACTURER PART NUMBER
---|---|---|---|---
REQUIRED CIRCUIT COMPONENTS
1| 1| C1| CAP CER 1uF 16V 20% X5R 0402| MURATA GRM155R61C105MA12D
2| 1| C2| CAP CER 10uF 16V 10% X5R 0805| MURATA GRM21BR61C106KE15L
3| 2| C3,C4| CAP CER 1uF 16V 10% X7R 0603| AVX

0603YC105KAT2A2

4| 2| C5,C6| CAP CER 3300PF 25V 10% X7R 0603| WALSIN TECHNOLOGY 0603B332K250CT
5| 2| D5,D6| DIO SCHOTTKY 150V 1A SOD123HE AEC-Q101| ONSEMI

S115FP

6| 1| R2| RES SMD 100K Ohm 1% 1/10W 0603 AEC-Q200| PANASONIC

ERJ-3EKF1003V

7| 4| R5,R6,R7,R8| RES SMD 0 Ohm 0603 AEC- Q200| VISHAY

CRCW0603000ZRT1

8| 1| U1| IC-ADI 150V DUAL HIGH SIDE MOSFET GATE DRIVER| ANALOG DEVICES LTC7067RMSE#PBF
OPTIONAL CIRCUIT COMPONENTS
1| 4| C7,C8,C9,C10| CAP CER 10UF 100V 10% X7S 1210| MURATA GRM32EC72A106KE05L

2

| ****

4

| ****

C11,C12,C13,C14

| CAP ALUM ELECT 47UF 100V 20% 12.5X13.5MM AEC-Q200

500MA 5000H

| PANASONIC EEV-FK2A470Q
3| 2| D1,D2,D3,D4| DIODE SCHOTTKY TMBS 10A 150V SMP| VISHAY

V10PM15-M3/H

4| 2| Q1,Q2| TRAN MOSFET N-CH 150V 56A 8LD TDSON EP| INFINEON TECHNOLOGIES BSC160N15NS5ATMA1
HARDWARE – FOR DEMO BOARD ONLY
1| 11| TP1,TP2,TP3,TP4,TP5,TP6

,TP7,TP8,TP9,TP10,TP11

| CONN-PCB SOLDER TERMINAL TURRETS| MILL-MAX

2501-2-00-80-00-00-07-0

2

| ****

4

| | STANDOFF, BRD SPT SNAP FIT 9.53MM LENGTH, EVAL BOARD MTG| KEYSTONE 8832

EVAL-LTC7067-AZ Schematic

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications are subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

www.analog.com

Frequently Asked Questions

What are the required circuit components for EVAL-LTC7067-AZ?
The required circuit components are as follows:

• C1: CAP CER 1uF 16V 20% X5R 0402
• C2: CAP CER 10uF 16V 10% X5R 0805
• C3, C4: CAP CER 1uF 16V 10% X7R 0603
• C5, C6: CAP CER 3300PF 25V 10% X7R 0603
• D5, D6: DIO SCHOTTKY 150V 1A SOD123HE AEC-Q101
• R2: RES SMD 100K Ohm 1% 1/10W 0603 AEC-Q200
• R5, R6, R7, R8: RES SMD 0 Ohm 0603 AECQ200
• U1: IC-ADI 150V DUAL HIGH SIDE MOSFET GATE DRIVER

What are the optional circuit components for EVAL-LTC7067-AZ?
The optional circuit components are as follows:

• C7, C8, C9, C10: CAP CER 10UF 100V 10% X7S 1210
• C11, C12, C13, C14: CAP ALUM ELECT 47UF 100V 20% 12.5X13.5MM  AEC-Q200 500MA 5000H
• D1, D2, D3, D4: DIODE SCHOTTKY TMBS 10A 150V SMP
• Q1, Q2: TRAN MOSFET N-CH 150V 56A 8LD TDSON EP

What are the terminal turrets and standoff required for EVAL-LTC7067-AZ?
The terminal turrets and standoff required for EVAL-LTC7067-AZ are as follows:

• Terminal Turrets: TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11
• Standoff: STANDOFF, BRD SPT SNAP FIT 9.53MM LENGTH, EVAL BOARD MTG

References

• LTC7067 Datasheet and Product Info | Analog Devices

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>