UAC3092A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 5

www.unisonic.com.tw

QW-R121-005,B

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

Filter Buffer

Remote Sense

Lamp Collector

Lamp Base

Gnd

Oscillato Adjust

Oscillator

Phase

Rate

Supply Regulation

Vcc3

Vcc1

Gnd

NC

Gate

Source

Undervoltage

11

12

13

14

15

16

17

18

19

20

PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

1

FB

This pin provides Sense input or the Supply Regulation input.

2

Sense

The Sense input is input for the true battery voltage.

3

Lamp Collector and

Power-Up/Down

This pin connects to drive the fault lamp. It is also used to sense a closed ignition

switch (voltage sense).

4

Lamp Base

This pin provides base current to the fault lamp drive transistor (Q2).

5

Ground

This pin is for Ground return for the fault lamp control logic circuit.

6

Ground

IC ground

7

Oscillator Adjust

Connected to a resistor to ground that adjusts the internal oscillator frequency

8

This is a pin for the 1.1 V ~ 1.4 V reference voltage test.

9

Oscillator

This is a pin for checking the operation of the internal oscillator.

10

Phase

The Phase input detects the existence of a magnetic field rotating within the

alternator.

11

Rate

The Rate pin is Load Response Control recovery rate selector pin used to select a

slow mode (floating) or fast mode (ground).

12

Supply Regulation

The Supply Regulation pin is used as a representation of the alternator output

voltage. This input also used to monitor overvoltage or load dump conditions.

13

Vcc3

Voltage supply for the internal Charge Pump.

14

Vcc1

Voltage supply for the entire IC except for the Charge Pump.

15

Ground

Ground for the IC.

16

N/C

No connection.

17

Gate

The Gate Controls of the MOSFET used to energize the field winding.

18

Source

MOSFET source reference for Field winding control.

19

Undervoltage

If this pin have voltage goes below 1.0 V, the fault lamp is turn on. The IC will

continue to function, but with limited performance.

20

Pin for the Band gap reference voltage 1.7 V ~ 2.3 V.

Note: Pin 8, and 20 are test points only