MIC4102YM Evaluation Board User Guide

MIC4102 Evaluation Board
MIC4102 Gate Driver Evaluation Board
General Description
Precautions
This evaluation board provides a platform for evaluating
the MIC4102 Power MOSFET driver. The MIC4102 is a
high voltage synchronous gate driver controlled by a single
input signal and is housed in an SOIC-8L package. The
MIC4102 operates from VDD of 6 to 16 V while the switch
and high side node operates up to 118V. The Driver can
be used in a variety of topologies. This evaluation board is
configured as an open loop buck converter operating in
continuous conduction mode (CCM) or discontinuous
conduction mode (DCM). The duty cycle D is determined
by the input PWM signal. The internal circuitry of the
MIC4102 generates delays between transitions to prevent
shoot-through currents.
The MIC4102 bias supply VDD is separate from the power
stage Vin. The high side driver is powered by an external
bootstrap capacitor CB and an internal bootstrap diode. No
external bootstrap diode is required. The CB cap is
charged by VDD during when the low side MOSFET is on.
Although the 4102 can operate up to 118V this evaluation
board was designed with parts rated at 100V maximum.
Operation of the evaluation board less to than 90Vin is
recommended. These limitations are for the evaluation
board only and not for the Mic4102. The output voltage is
dependent on the duty cycle of the PWM and the input
voltage. Vout =Vin(Ton/T) (CCM only). T is the period of
the input PWM pulse and the on time is when the high side
FET Q1 is on and the off time is when the low side FET Q2
is on.
The operating conditions need to be within limits to keep
the inductor L1 from saturating. It is important to keep
IL_pk below I_sat
Specifications (evaluation board only)
•
•
•
•
•
Recommended operating input voltage Vin ….12-90V
Recommended operating input VDD…………..12V
Recommended operating frequency…200khz-500khz
Maximum input Vin Voltage……………………..90V
Maximum input VDD voltage…………………….16V
Requirements
IL _ pk = Iout +
IL _ pk =
(Vin − Vout )DT
< I _ sat
2L
(Vin − Vout )DT
< I _ sat
L
For CCM
For DCM
Where; D=Ton/T, T=1/F, L=L1, I_sat is the saturating
current of L1.
Table 1 lists a set of safe operating parameters.
Additional power FETs may be installed on the back for
higher voltages.
Ordering Information
Part Number
Description
MIC4102YM-EV
MIC4102 Gate Driver Evaluation Board
The MIC4102 evaluation board requires an input voltage
for VDD and a Vin voltage for the power stage. The output
may be loaded with a resistive or and active load. The
active load can be set for constant current or constant
resistance.
MLF and MicroLead Frame is a registered trademark of Amkor Technologies, 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
June 2009
M9999-061809
Micrel
MIC4102 Evaluation Board
Some safe operating conditions
VIN (V)
VOUT (V)
12
12
12
24
24
24
48
48
48
48
48
48
60
60
60
80
90
3.3
3.3
3.3
5
5
5
12
12
12
24
24
24
12
12
12
12
12
Freq
(hz)
100k
200k
400k
100k
200k
400k
300k
400k
500k
300k
400k
500k
300k
400k
500k
400k
400k
IOUT (A)
IIN(A)(ave)
Duty
Mode
IL_pk
IL_sat
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
2.0 A
0.55
0.55
0.55
0.42
0.42
0.42
0.56
0.56
0.56
1
1
1
0.42
0.42
0.42
0.37
0.33
.29%
.29%
.29%
.22%
.22%
.22%
.26%
.26%
.26%
.56%
.56%
.56%
.21%
.21%
.21%
.12%
.15%
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
CCM
3.3 A
2.6 A
2.3 A
3.0 A
4.1 A
4.1 A
3.6 A
3.2 A
3
4.2 A
3.7 A
3.3 A
3.8 A
3.4 A
3.1 A
3.4 A
3.4 A
4.4A
4.4A
4.4A
4.4A
4.4A
2.5A
4.4A
4.4A
4.4A
4.4A
4.4A
4.4A
4.4A
4.4A
4.4A
4.4A
4.4A
L is 10uh, Sumida # CDRH104R-100
Table 1. Set of safe operating parameters
PCB Layout
Top
June 2009
Bottom
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M9999-061809
Micrel
MIC4102 Evaluation Board
Figure1. Schematic Diagram
June 2009
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Micrel
MIC4102 Evaluation Board
Bill of Materials
Item
U1
Q1,Q2
Q1A,Q2A
C1, C2
C3,C6
C4,C5
C7
D1
L1
J1-J9
Part Number
MIC4102YM
Si4484EY
VJ0603Y104KXXAT
GRM31CR72A105KA01L
EKA00DD310L00K
038RSU
VJ0805X222KXABT
SS2PHH10-E3
CDRH104R-100
2551-2-00-01-00-00-07-0
Manufacturer
Micrel.Inc
Vishay/Siliconix
Vishay/Siliconix
Vishay BC
muRata
Vishay
Description
Buck controller
100V N-channel MOSFET
open location for D2PAK FETs
0.1uf/50V, X7R ceramic cap 0603 size
1uF, 100V, ceramic, X7R,1206
100uF Cap, 100v Aluminium
Vishay
Vishay General
Sumida
MilMax
2200pf/100V,0805
2A,100V, High voltage Schottky Diode,
10uH Inductor
Turret Pins
Qty.
1
2
0
2
2
2
OR
1
1
1
8
Notes:
Micrel Semiconductor tel: 408-944-0800
Vishay Corp. tel: 206-452-5664
Diodes, Inc. tel: 805-446-4800
muRata tel: 800-831-9172
Sumida tel: 408-321-9660
AVX tel: 843-448-9411
TDK tel: 847-803-6100
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
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© 2006 Micrel, Incorporated.
June 2009
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