MIC4608YM Evaluation Board User Guide

MIC4608 Evaluation Board
600V Half Bridge MOSFET Driver
Revision 1.0
General Description
The MIC4608 is a 600V Half Bridge IGBT or MOSFET
driver. The MIC4608 features a 450ns propagation delay
including a 200ns input filtering time to prevent unwanted
pulses. The low-side and high-side gate drivers are
independently controlled (with shoot thru protection) or
controlled with a single PWM signal. The MIC4608 has
TTL input thresholds. Under-voltage protection is provided
on both the low-side and high-side drivers.
The MIC4608 evaluation board requires a VDD power
supply with an output between 10V and 20V and a high
voltage VBUS power supply that is used to drive the Motor
or other load. Do not exceed 450V on VBUS unless C8 is
removed. (See below.)
The MIC4608 is available in a 14-pin SOIC package and
has an operating junction temperature range of –40°C to
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
The evaluation board does not have reverse polarity
protection. Applying a negative voltage to either the VBUS
(J6) or VDD (J7) terminals may damage the device. Do not
exceed 450V on VBUS due to the 450V rating of the 10µF
Aluminum Electrolytic capacitor (C8). Remove C8 if
voltages between 450V and 600V are required.
Ordering Information
Part Number
MIC4608YM Evaluation Board
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 8, 2015
Revision 1.0
Micrel, Inc.
MIC4608 Evaluation Board
Circuit Description
Getting Started
The evaluation board consists of the MIC4608 driver and
two IGBTs, connected in a ½ bridge configuration. The
board may be used to drive a motor, solenoid or other
load. Headers on the board provide connections to VDD,
HI, LI, ST (state pin) and EN.
Connect the input supply
Connect the VDD supply to the VDD and Ground terminals
(J7). Pay careful attention to the polarity and supply
voltage range (10V minimum to 20V maximum). An
ammeter may be placed between the supply and the VDD
terminal to measure input current.
State Pin (ST)
The state pin configures the driver for single (PWM) input
or independent (HI/LI) input operation. A jumper on J3 is
may be used to set the ST input high or low.
Connect the VBUS supply and Load
Connect the high voltage VBUS supply and ground to
connector J6. The evaluation board restricts the maximum
VBUS voltage to 450V due to the rating of the input
Aluminum Electrolytic capacitor (C8).
For voltages
between 450V and 600V, C8 must be removed.
The motor or load may be connected between either J6
pins 1 to 2 (high side connection) or between J6 pins 2 to
3 (low side connection). If connected between pins 1 and
2, the low-side IGBT actively PWMs the load, while the
high-side IGBT acts as the freewheeling device.
connected between pins 2 and 3, the high-side IGBT
actively PWMs the load, while the low-side IGBT acts as
the freewheeling device.
Setting the ST pin low allows the HO and LO outputs to be
independently controlled by the HI and LI pins
respectively. Setting the ST pin high will disable the LI
input and the HO and LO pins are controlled by the HI pin.
Dead time is automatically added between the HO and LO
outputs in this mode.
Enable Pin (EN)
An external connection or a jumper on J4 may be used to
set the EN pin state. When using an external connection,
make sure the EN pin voltage does not exceed VDD.
Setting the EN pin low puts the device into a low IQ state
and turns off both the LO and HO outputs. A high level on
the EN pin turns on the internal bias’ in the driver and
allows the driver to operate normally.
Input Pins (HI/LI)
Header J2 may be used to make the input connection to
the driver. If the ST pin is low, the HI input controls the HO
output and the LI pin controls the LO output. Both drivers
are non-inverting.
If the ST pin is high, the LI pin is disabled and the HI pin
controls both the HO and LO outputs. If the HI in is high,
the LO pin goes low and the HO pin is high. If the HI pin is
low, the HO pin goes low and the LO pin goes high.
Internal circuitry prevents both outputs from being in a high
state at the same time.
May 8, 2015
Revision 1.0
Micrel, Inc.
MIC4608 Evaluation Board
Evaluation Board Schematic
May 8, 2015
Revision 1.0
Micrel, Inc.
MIC4608 Evaluation Board
Bill of Materials
Part Number
No Fill
C2, C7
Cornell Dubilier
1µF, 630V, X7T, Ceramic Capacitor
10µF, 450V, Aluminum Electrolytic
33µF, 35V, Aluminum Electroltyic
C4, C6, C9
1µF, 100V, X7S, 0805
1nF, 100V, X7R, 0805
D1, D2, D3,
1A, 1kV, Fast Recovery Diode
Q1, Q2
IGBT, 600V, 8.5A, DPAK
10Ω (0603 size), 1%
Vishay Dale
R1, R2, R14
No Fill
R6, R7
Vishay Dale
0Ω (0603 size)
R8, R9, R10,
Vishay Dale
10kΩ (0603 size), 1%
600V Half Bridge MOSFET or IGBT Driver
1. TDK: www.tdk.com.
2. Cornell Dubilier: www.cde.com.
3. Panasonic: www.panasonic.com.
4. Vishay: www.vishay.com.
5. IR: www.IRF.com.
6. Vishay: www.vishay.com.
7. Micrel, Inc.: www.micrel.com.
May 8, 2015
Revision 1.0
Micrel, Inc.
MIC4608 Evaluation Board
PCB Layout
Top Layer
Bottom Layer
May 8, 2015
Revision 1.0
Micrel, Inc.
MIC4608 Evaluation Board
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
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May 8, 2015
Revision 1.0