LM4970

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SNVS312D – JANUARY 2005 – REVISED MAY 2013

(1) (2) (3)

LM4970

Units

Symbol

Parameter

Conditions

(Limits)

Supply Curent

2.2

3

mA (max)

Shutdown Mode

0.5

2

μA (max)

.66X current drive setting

12

mA

1X current drive setting

18

mA

LED Drive Current

1.33X current drive setting

27

mA

2X current drive setting

35

21

mA (min)

PWM Frequency

PWM_F<1:0> = '01'

60

Hz

Maximum setting

12

dB

Input Signal Level Gain Control

Minimum setting

–11

dB

(1)

All voltages are measured with respect to the GND pin unless otherwise specified.

(2)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical

specifications under particular test conditions which specify specific performance limits. This assumes that the device is within the

Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication

of device performance.

(3)

(4)

Typicals are measured at +25°C and represent the parametric norm.

(5)

Limits are ensured to AOQL (Average Outgoing Quality Level).

(6)

Datasheet min/max specification limits are ensured by design, test, or statistical analysis.

External Components Description

Components

Functional Description

1.

This is the input coupling capacitor. It blocks the DC voltage and couples the input signal to the amplifier's input

2.

3.

This capacitor creates a low pass filter with an internal 4k

determines the high cutoff frequency for the low band PWM color LED driver output, LED1.

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