MIC4223/4/5 Evaluation Boards Dual 4A, Low-Side MOSFET Drivers with Enable General Description The MIC4223/MIC4224/MIC4225 is a family of dual 4A, high-speed, low-side MOSFET drivers with logic-level driver enables. These evaluation boards provide a platform to evaluate the parts. The parts are packaged in either an 8-pin SOIC (YM suffix) or 8-pin ePAD-MSOP (YMME suffix). An evaluation board is available for each package. The evaluation boards are populated with a MIC4224YM or MIC4224YMME, but may be used with any of the 3 driver configurations. To evaluate the MIC4223 or MIC4225, order a MIC4224 evaluation board and populate with MIC4223 or MIC4225 devices. Please refer to the MIC4223/MIC4225/MIC4225 datasheet for a detailed explanation of the driver IC. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Evaluation Board Description Control IC ............................MIC4223/MIC4224/MIC4225 Topology......Dual Low-Side MOSFET Driver with Enable VDD Supply Voltage Range............................. 4.5V to 18V Maximum Input Pin Voltage ........................................ VDD Maximum Enable Pin Voltage ..................................... VDD Maximum External FET Supply Voltage .................... 25V Requirements Related Documentation • MIC4223/MIC4225/MIC4225 Datasheet Precautions The evaluation board does not have reverse polarity protection. Applying a negative voltage to the VDD, VEN or VIN terminals may damage the device. Ordering Information Part Number Description Package MIC4223YM Dual Inverting Driver 8-pin SOIC MIC4224YM Dual Non-Inverting Driver 8-pin SOIC MIC4225YM Inverting and NonInverting Driver 8-pin SOIC MIC4223YMME Dual Inverting Driver 8-pin ePAD MSOP MIC4224YMME Dual Non-Inverting Driver 8-pin ePAD MSOP MIC4225YMME Inverting and NonInverting Driver 8-pin ePAD MSOP MIC4224YM EV Evaluation Board 8-pin SOIC MIC4224YMME EV Evaluation Board 8-pin ePAD MSOP The evaluation board requires: • An VDD supply to power the driver • An square or pulse input signal • An external supply voltage for the MOSFET drains Features • • • External MOSFETs on the board for ease of testing Voltage divider resistor locations for adjusting VDD turn-on UVLO Resistor and capacitor component locations on the driver output for ease of testing MLF and MicroLeadFrame are trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com July 2010 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Driver Output Getting Started The evaluation board allows the option of driving a MOSFET or capacitance. The board comes with a 30V N-channel MOSFET to show “real world” operation. The MOSFET may be removed and a capacitor used if a standardized test is required. Capacitor locations C3 (OUT_A) and C6 (OUT_B) allow the option of testing the driver output with a capacitance. Resistor locations R4 and R9 allow a resistor to be placed in series with the driver output. The board comes with the resistor pads shorted. The etch between the pads must be cut before a resistor may be added. 1. VDD Supply Connect the VDD and GND terminals to an external supply voltage. The input voltage range is from 4.5V to 18V. 2. VINA and VINB Signals Apply a square wave or pulse to the INA or INB terminals. The logic 0 level is less than 0.8V and the logic 1 level is greater than 2.4V. The maximum logic 1 level voltage is VDD. Headers TP1 and TP4 can be used to apply an input signal or monitor the input. 3. Monitor Output The output signal can be monitored with a scope probe at the OUT_A and OUT_B pins. Headers TP3 and TP6 can also be used to monitor the driver output. External MOSFETs An external 30V MOSFET is included with the board to facilitate testing of the driver. Terminals are provided for an external supply to be connected (DRAIN_A and DRAIN_B). A 1k load resistor is also supplied so MOSFET switching can be observed. A 1µF capacitor, connected to the DRAIN_A and DRAIN_B terminals helps decouple switching currents on the board. Enable An internal pull-up enables the driver if the enable pins (ENA and ENB) are open. Pulling the enable pins low disables the driver and forces the output low. Headers TP2 and TP5 can be used to apply an enable signal or monitor the output. A resistor divider may be used to program a supply voltage UVLO. Resistors pairs (R1, R2) and (R6, R8) form voltage dividers from VDD to ground. The dividers can be used to enable the driver output when VDD rises above a desired value. The VDD threshold voltage is calculated as follows: Evaluation Board Layout The evaluation board is constructed of two layers with the bottom layer predominately ground. ⎛ R1 ⎞ VDD_UVLO = VEN_H × ⎜1+ ⎟ ⎝ R2 ⎠ Layer Section Description L1 Power, Signal L2 Ground Table 1. Layer Stack Where: VEN_H = 1.9V (typical) The value of R1 should be in the 1k range to allow it to over-ride the internal 100k pull-up resistor on the enable pin. For R1=1k, and a known VDD UVLO voltage, the value of R2 can be calculated by rearranging the above equation. R2 = July 2010 R1 VDD_UVLO −1 VEN_H 2 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Evaluation Board Schematic (8-Pin SOIC) July 2010 3 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Bill of Materials (8-Pin SOIC) Item C1 Part Number AVX C1608X7R1H104K TDK(2) C4, C5 C1608X4R1E105M TDK(2) AVX(1) C3216X7R1E105K TDK(2) U1 CRCW12061001FRT1 MIC4224YM (4) Vishay Vishay(4) Micrel, Inc. (5) MIC4223YM U1(6) MIC4225YM 2 1µF Ceramic Capacitor, X5R, Size 1206, 25V 2 Open Location, Size 0603 2 30V, N-Channel MOSFET 2 Open Location, Size 0603 6 1kΩ Resistor, size 1206, 1% 2 Dual, Non-Inverting 4A MOSFET Driver with Enable 1 muRata(3) R1, R2, R4, R6, R8, R9 R5, R7 1µF Ceramic Capacitor, X5R, Size 0603, 25V muRata 12063D105MAT2A Si4174DY 1 (3) C3, C6 Q1, Q2 0.1µF Ceramic Capacitor, X7R, Size 0603, 25V muRata AVX(1) GRM31MR71H105KA01 Qty (3) 06033D105MAT2A GRM188R61E105KA93 Description (1) 06033C104KAT GMR188R71H104KA93D C2, C7 Manufacturer Dual, Inverting 4A MOSFET Driver with Enable Micrel, Inc.(5) Dual, Inverting and Non-Inverting 4A MOSFET Driver with Enable 0 Notes: 1. AVX: www.avx.com. 2. TDK: www.tdk.com. 3. muRata: www.murata.com. 4. Vishay: www.vishay.com. 5. Micrel, Inc.: www.micrel.com. 6. Not included with evaluation kit. Part must be ordered separately. July 2010 4 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Evaluation Board Layers (8-Pin SOIC) July 2010 Top Layer (L1) Bottom Layer (L2) Top Silk Screen Bottom Silk Screen 5 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Evaluation Board Schematic (8-Pin ePAD MSOP) July 2010 6 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Bill of Materials (8-Pin ePAD MSOP) Item C1 Part Number AVX C1608X7R1H104K TDK(2) C4, C5 C1608X4R1E105M TDK(2) AVX(1) C3216X7R1E105K TDK(2) U1 CRCW12061001FRT1 MIC4224YMME MIC4223YMME U1(6) MIC4225YMME 2 1µF Ceramic Capacitor, X5R, Size 1206, 25V 2 Open Location, Size 0603 2 30V, N-Channel MOSFET 2 Open Location, Size 0603 6 1kΩ Resistor, size 1206, 1% 2 Dual, Non-Inverting 4A MOSFET Driver with Enable 1 muRata(3) (4) Vishay R1, R2, R4, R6, R8, R9 R5, R7 1µF Ceramic Capacitor, X5R, Size 0603, 25V muRata 12063D105MAT2A Si4174DY 1 (3) C3, C6 Q1, Q2 0.1µF Ceramic Capacitor, X7R, Size 0603, 25V muRata AVX(1) GRM31MR71H105KA01 Qty (3) 06033D105MAT2A GRM188R61E105KA93 Description (1) 06033C104KAT GMR188R71H104KA93D C2, C7 Manufacturer Vishay(4) (5) Micrel, Inc. Micrel, Inc. (5) Dual, Inverting 4A MOSFET Driver with Enable Micrel, Inc. (5) Dual, Inverting and Non-Inverting 4A MOSFET Driver with Enable 0 Notes: 1. AVX: www.avx.com. 2. TDK: www.tdk.com. 3. muRata: www.murata.com. 4. Vishay: www.vishay.com. 5. Micrel, Inc.: www.micrel.com. 6. Not included with evaluation kit. Part must be ordered separately. July 2010 7 M9999-071610 Micrel, Inc. MIC4223/4/5 Evaluation Board Evaluation Board Layers (8-Pin ePAD MSOP) Top Layer (L1) Bottom Layer (L2) Top Silk Screen Bottom Silk Screen 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 The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. 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. © 2010 Micrel, Incorporated. July 2010 8 M9999-071610