Micrel, Inc.

MIC4102

November 2006

2

M9999-112806

Ordering Information

Part Number

Standard

Pb-Free

Input

Junction Temp. Range

Package

MIC4102BM

MIC4102YM

TTL

–40° to +125°C

SOIC-8L

Pin Configuration

1

VDD

HB

HO

HS

8LO

VSS

LS

PWM

7

6

5

2

3

4

SOIC-8L (M)

Pin Description

Pin Number

Pin Name

Pin Function

1

VDD

Positive Supply to lower gate drivers. Decouple this pin to VSS (Pin 7). Bootstrap

diode connected to HB (pin 2).

2

HB

High-Side Bootstrap supply. External bootstrap capacitor is required. Connect

positive side of bootstrap capacitor to this pin. Bootstrap diode is on-chip.

3

HO

High-Side Output. Connect to gate of High-Side power MOSFET.

4

HS

High-Side Source connection. Connect to source of High-Side power MOSFET.

Connect negative side of bootstrap capacitor to this pin.

5

PWM

Control Input. PWM high signal makes high-side HO output high, and low-side

LO output low. PWM low signal makes high-side HO output low, and low-side

LO output high.

6

LS

Low-Side Disable. When pulled low, this control signal immediately terminates

the low-side LO output drive. The low-side LO output drive will remain low until

this signal is removed. HS drive is not affected by the LS signal. Here is the

logic table:

LS

PWM

LO

HO

0

0

0

0

0

1

0

1

1

0

1

0

1

1

0

1

7

VSS

Chip negative supply, generally will be grounded.

8

LO

Low-Side Output. Connect to gate of Low-Side power MOSFET.