OBSOLETE

LM4651, LM4652

SNOS507H – MAY 2000 – REVISED APRIL 2013

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Typical Application

Figure 3. Typical Application Circuit and Test Circuit

LM4651 PIN DESCRIPTIONS

Pin No.

Symbol

Description

1

The reference pin of the power MOSFET output to the gate drive circuitry.

2,27

3

High

−Gate #1 is the gate drive to a top side MOSFET in the H-Bridge.

4

High

−Gate #2 is the gate drive to a top side MOSFET in the H-Bridge.

5,15

GND

The ground pin for all analog circuitry.

The internally regulated positive voltage output for analog circuitry. This pin is available for internal

6

regulator bypassing only.

7

The positive supply input for the IC.

The internally regulated negative voltage output for analog circuitry. This pin is available for internal

8

regulator bypassing only.

9

The feedback instrumentation amplifier output pin.

The error amplifier inverting input pin. The input audio signal and the feedback signal are summed at

10

this input pin.

11

The error amplifier output pin.

12

TSD

The thermal shut down input pin for the thermal shut down output of the LM4652.

13

STBY

Standby function input pin. This pin is CMOS compatible.

14

(pin 15 on the LM4652 ).

The switching frequency oscillation pin. Adjusting the resistor from 15.5k

Ω to 0Ω changes the

16

OSC

switching frequency from 75kHz to 225kHz.

17

Delay

The dead time setting pin.

6

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