HT8691

Class D Audio Amplifier

Copyright ©2016, Jiaxing Heroic Technology Co., Ltd

-3-

11/2016 – V0.1

 ELECTRICAL CHARACTERISTIC

 Absolute Maximum Ratings *3

Item

Symbol

Min.

Max.

Unit

BOOST converter output voltage and Power supply voltage

range

PVDD

-0.3

7.8

V

Input terminal voltage range (IN+, IN-)

VIN

－

0.6

PVDD＋0.6

V

Input terminal voltage range (except IN+, IN-)

VIN

－

0.3

PVDD＋0.3

V

Operating Ambient Temperature

TA

-40

85

℃

Junction Temperature

TJ

-40

150

℃

Storage Temperature

TSTG

-50

150

℃

*3:

Absolute Maximum Ratings is values which must not be exceeded to guarantee device reliability. With a system in

which supply voltage might exceed supply voltage of PVDD/GND, external diodes are recommended to be used to

assure that the voltage does not exceed the absolute maximum rating.

 Recommended Operating Condition

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

BOOST converter output voltage and Power

supply voltage range *4

PVDD

VBAT

6.5

7.5

V

Operating Ambient Temperature

Ta

-40

25

85

℃

Speaker Impedance

RL

SOP8L-PP

4

Ω

*4:

The rising time of PVDD should be more than 1µs.

 Electrical Specification *5

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

BOOST Converter

Boost converter output

voltage

PVDD

VBAT

6.5

7.5

V

Boost converter

frequency

fSW

410

kHz

Boost converter input

current limit

ILIMTRIP

2.3

A

Class D Channel

VSS=0V, VBAT =3.6V, RIN = 56K, Ta=25ºC, CIN=0.1uF, ACF-Off mode, unless otherwise specified

Carrier clock frequency

fPWM

410

kHz

Over current protection

Imax

5

A

System Gain

Av0

RIN=56 kΩ

26

dB

Start-up time (power-on

or shutdown release)

tSTUP

280

ms

ACF attenuation gain

Aa

-16

0

dB

Consumption current in

shutdown mode

ISD

CTRL=VSS

25

µA

PVDD = 6.5V

Output Power

PO

RL=4Ω

VBAT=4.2V,

f=1kHz,

THD+N=10%

5.3

W

RL=8Ω

3.0

RL=4Ω

VBAT=4.2V,

f=1kHz,

THD+N=1%

4.3

RL=8Ω

2.5

Total Harmonic

Distortion plus Noise

THD+N

PO=0.1W

RL=4Ω,

f=1kHz

0.13

%

PO=1.0W

0.10

%

PO=3.0W

0.15

%

Output Noise

VN

f=20Hz~20kHz, A weighted,

Av=26dB

150

µVrms

Signal to Noise Ratio

SNR

A weighted, Av=26dB, THD+N

= 1%

90

dB

Output offset voltage

VOS

±

2

mV

Efficiency (Class D +

Boost)

η

VBAT=3.6V, RL=4Ω+22uH,

THD+N = 10%

74

%