Microchip MIC4100/1/3/4 Manual

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Side 1/4

MIC4100/1/3/4

Family 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

June 2008 M9999-061708-C

General Description

The MIC4100, MIC4101, MIC4103 and MIC4104 are a

family of high-frequency, 100V MOSFET drivers. Each part

contains a high-side and low-side driver and will drive

many switching power supply topologies. Refer to the

MIC4100/1 and MIC4103/4 specifications for detailed

information.

This evaluation board provides a platform for evaluating

any of the drivers. The evaluation board schematic is

shown in Figure 1. A 1µF, 100V ceramic capacitor is

connected between the “HV Supply Input” and “Ground”

terminals and provides high frequency decoupling on the

board. 0.1µf capacitors are used for decoupling the VDD

and HB pins of the driver. 100V, N-Channel, SO-8 FETs

are included with the board.

Specifications

Control IC (refer to board for part ID):

MIC4100/1 or MIC4103/4

Power Supply Topology:

Drives an on-board MOSFET Bridge

Recommended “HV Supply” Terminal Voltage:

8V to 100V

Maximum Recommended “VDD” Terminal Voltage:

16V

Maximum “High Side FET Source” Terminal Voltage:

100V

Maximum HI/LI/LS Terminal Voltage:

VDD

Precautions

The evaluation board does not have input reverse polarity

protection. Applying a negative voltage at the “HV Supply”

or “VDD” terminals (with respect to the GND terminal) may

permanently damage the components on the board. The

voltage on the HI and LI terminals should not exceed the

“VDD” terminal voltage.

Requirements

At a minimum, the evaluation board requires an 8V to 16V

supply to power the MIC410x driver. Another supply (up to

100V) may be used to power the MOSFETs at the “HV

Supply” terminal. A pulse generator or the output of a

PWM control IC may be connected to the HI and/or LI

terminals. The board can be used with any of the 4 driver

IC’s.

MIC4100/3: The HI and LI inputs have a CMOS-

compatible threshold. The high-side and low-side drivers

are independently controlled by the HI and LI inputs. The

inputs may be connected to separate PWM sources or can

be connected together.

MIC4101/4: Same as the MIC4100/3 but the inputs have

a TTL-compatible threshold.

Getting Started

The simplest way to observe driver operation is to connect

the “High Side FET Source” terminal to ground (or any

voltage potential under 100V) and apply a PWM signal to

the “HI” and/or “LI” input terminals. DC and AC parameters

can be measured in this configuration. The included SO-8

MOSFETs can be removed or replaced with different

FETs. D2PAK locations are provided on the back of the

board.

The source terminal of the high-side FET and drain

terminal of the low-side FET, are oating and accessible

through the board terminals. This allows the board to be

used with different power topologies such as the

synchronous buck, half-bridge, full-bridge or two transistor

forward converter.

Micrel, Inc. MIC4100/1/3/4 Evaluation Board

June 2008 2 M9999-061808-C

Ordering Information

Part Number Description Package

MIC4100YM CMOS Input, 3Ω Pull-down 8-Pin SOIC

MIC4101YM TTL Input, 3Ω Pull-down 8-Pin SOIC

MIC4103YM CMOS Input, 1.25Ω Pull-down 8-Pin SOIC

MIC4104YM TTL Input, 1.25Ω Pull-down 8-Pin SOIC

MIC4100YM EV Evaluation Board EVB Kit

MIC4101YM EV Evaluation Board EVB Kit

Evaluation Board Schematic

VSS

VDD

6 4

MIC4100/1YM/BM

0.1µF

1µF/100V

Q1-A

OPEN

Q2-A

OPEN

5-8

1-3

SI4484EY

5-8

1-3

SI4484EY

HV Supply

High-Side FET Source

Low-Side FET Source

Ground

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	MIC4100/1/3/4

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