MIC4605 Evaluation Board 85V Half-Bridge MOSFET Drivers with Adaptive Dead Time and Shoot-Through Protection General Description Getting Started The MIC4605 is an 85V half-bridge MOSFET driver that features adaptive-dead-time and shoot-through protection. The adaptive-dead-time circuitry actively monitors the halfbridge outputs to minimize the time between high-side and low-side MOSFET transitions, thus maximizing power efficiency. Anti-shoot-through circuitry prevents erroneous inputs and noise from turning both MOSFETs on at the same time. Additionally, the MIC4605’s adjustable gate drive sets the gate drive voltage to VDD for optimal MOSFET RDS(ON), which minimizes power loss due to the MOSFET’s RDS(ON). 1. Connect VIN supply between the VIN and GND terminals and VDD supply between the VDD and GND terminals. Connect a supply between the VIN terminal (J2) and the GND terminal (J3), paying careful attention to polarity and supply range (VIN ≤ 85V). Do not apply power until Step 5. Connect a supply between the VDD terminal (J1) and the GND terminal (J3), paying careful attention to polarity and supply range (5.5V ≤ VDD < 16V). Do not apply power until Step 5. Requirements At a minimum, the evaluation board requires a 5.5V to 16V power supply to power the VDD terminal (J1) of the MIC4605 and another supply (up to 85V) may be used to power the MOSFETs connected to the VIN terminal (J2). A pulse generator or the output of a PWM control IC may be connected to the HI and LI terminals (−1), or PWM single input (−2). 2. Connect the TTL-compatible HI and LI inputs (−1), or the PWM single input (−2). Connect the HI input (JP2) and LI input (JP3) to a pulse generator or the output of a PWM control IC. Ensure that they are non-overlapping signals and are TTL compatible logic-levels. The PWM single input replaces the HI input (JP2) for the −2 option. Precautions There is no reverse input protection on this board. When connecting the input sources, make sure that the correct polarity is observed. 3. Monitor inputs and outputs. Monitor the inputs HI (JP2) and LI (JP3) or PWM (JP2) and outputs HO (JP1) and LO (JP4) with an oscilloscope. Under extreme load conditions and with a high supply voltage (>48V) connected to the VIN terminal (J2), input transients can be quite large if long test leads are used. In such cases a 100µF, 100V electrolytic capacitor is needed across the VIN terminals to prevent overvoltage damage to the IC. This can be removed if a clean supply voltage on VIN is always guaranteed. 4. Connect motor across HS and GND or connect HS to GND. The simplest way to observe the MIC4605 operation is to connect a motor across the HS terminal (J8) and GND (J9). Alternatively the HS terminal (J8) can be shorted to GND (J9) with the VIN supply turned OFF. DC and AC parameters can be easily measured in this configuration. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. 5. Turn-on supplies and HI/LI inputs. Turn-on the VDD power supply, followed by the VIN power supply. Turn on the HI and LI inputs (−1) or PWM single input (−2). Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com November 18, 2013 Revision 1.0 Micrel, Inc. MIC4605 Evaluation Board Ordering Information Part Number Description MIC4605-1YMT EV Evaluation Board Featuring the MIC4605-1YMT Half-Bridge MOSFET Driver with Dual-TTL Inputs MIC4605-2YMT EV Evaluation Board Featuring the MIC4605-2YMT Half-Bridge MOSFET Driver with Dual-TTL Inputs MIC4605-1YM EV Evaluation Board Featuring the MIC4605-1YM Half-Bridge MOSFET Driver with Single-PWM Input MIC4605-2YM EV Evaluation Board Featuring the MIC4605-2YM Half-Bridge MOSFET Driver with Single-PWM Input Evaluation Board Performance November 18, 2013 2 Revision 1.0 Micrel, Inc. MIC4605 Evaluation Board Evaluation Board Schematic (MIC4605YM) Bill of Materials Item C1 Part Number C1608X7R1E105K GRM188R71E105KA12D C1608X7R1E104K C2 C3 C4 U1 TDK Murata (2) (3) GRM188R71E104KA01D Murata B41851-A9107-M008 TDK CGA5L2X7R2A105K TDK 12061C105K4Z4A AVX SiR698DP-T1-GE3 MIC4605YM Qty. 1.0µF Ceramic Capacitor, 25V, X7R, Size 0603 1 0.1µF Ceramic Capacitor, 25V, X7R, Size 0603 1 100µF, 100V, Radial Electrolytic Capacitor 1 1.0µF Ceramic Capacitor, 100V, X7R, Size 1206 1 100V , N-Channel MOSFET , SO8 2 85V Half-Bridge MOSFET Drivers with 5.5V to 16V Gate Drive 1 TDK AVX AM7414NA Description (1) 06033C104KAT2A GRF31CR72A105KA01L Q1, Q3 Manufacturer Murata (4) Analog Power Vishay (5) Micrel, Inc. Notes: 1. TDK: www.tdk.com. 2. Murata: www.murata.com. 3. AVX: www.avx.com. 4. Analog Power: www.analogpowerinc.com. 5. Micrel, Inc.: www.micrel.com. November 18, 2013 3 Revision 1.0 Micrel, Inc. MIC4605 Evaluation Board PCB Layout Recommendations (MIC4605YM) MIC4605YM Evaluation Board − Top Layer MIC4605YM Evaluation Board − Bottom Layer November 18, 2013 4 Revision 1.0 Micrel, Inc. MIC4605 Evaluation Board Evaluation Board Schematic (MIC4605YMT) Bill of Materials Item C1 Part Number C1608X7R1E105K GRM188R71E105KA12D C1608X7R1E104K C2 C3 C4 U1 TDK Murata (7) (8) GRM188R71E104KA01D Murata B41851-A9107-M008 TDK CGA5L2X7R2A105K TDK 12061C105K4Z4A AVX SiR698DP-T1-GE3 MIC4605YMT Qty. 1.0µF Ceramic Capacitor, 25V, X7R, Size 0603 1 0.1µF Ceramic Capacitor, 25V, X7R, Size 0603 1 100µF, 100V, Radial Electrolytic Capacitor 1 1.0µF Ceramic Capacitor, 100V, X7R, Size 1206 1 100V , N-Channel MOSFET , SO8 2 85V Half-Bridge MOSFET Drivers with 5.5V to 16V Gate Drive 1 TDK AVX AM7414NA Description (6) 06033C104KAT2A GRF31CR72A105KA01L Q1, Q3 Manufacturer Murata (9) Analog Power Vishay Micrel, Inc. (10) Notes: 6. TDK: www.tdk.com. 7. Murata: www.murata.com. 8. AVX: www.avx.com. 9. Analog Power: www.analogpowerinc.com. 10. Micrel, Inc.: www.micrel.com. November 18, 2013 5 Revision 1.0 Micrel, Inc. MIC4605 Evaluation Board PCB Layout Recommendations (MIC4605YMT) MIC4605YMT Evaluation Board − Top Layer MIC4605YMT Evaluation Board − Bottom Layer November 18, 2013 6 Revision 1.0 Micrel, Inc. MIC4605 Evaluation Board MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2013 Micrel, Incorporated. November 18, 2013 7 Revision 1.0