MIC4826

Micrel

MIC4826

2

August 2004

Pin Configuration

1

VDD

RSW

REL

GND

8VA

VB

CS

SW

7

6

5

2

3

4

8-Pin MSOP Package (MM)

Pin Description

Pin Number

Pin Name

Pin Function

1

VDD

Supply (Input): 1.8V to 5.5V for internal circuitry.

2

RSW

Switch Resistor (External Component): Set switch frequency of the internal

power MOSFET by connecting an external resistor to VDD. Connecting the

external resistor to GND disables the switch oscillator and shutdown the

device.

3

REL

EL Resistor (External Component): Set EL frequency of the internal H-bridge

driver by connecting an external resistor to VDD. Connecting the external

resistor to GND disables the EL oscillator.

4

GND

Ground Return.

5

SW

Switch Node (Input): Internal high-voltage power MOSFET drain.

6

CS

Regulated Boost Output (External Component): Connect to the output

capacitor of the boost regulator and connect to the cathode of the diode.

7

VB

EL Output: Connect to one end of the EL lamp. Polarity is not important.

8

VA

EL Output: Connect to the other end of the EL lamp. Polarity is not impor-

tant.