Datasheet

Onboard
Chip
4-wirestereojack
HSOR
HSOL
Cl
Cl
Rb
HSMIC .M
HSMIC .P
VHSMIC .OUT
Cb
Rs
Rs
Rl
Rl
Rsb
C
s
C
s
GPIO_6 ( MUTE )
ExternalFET
C
HM.O
C
HM.P
C
HM.M
032-021
TPS65950
www.ti.com SWCS032E–OCTOBER 2008–REVISED JANUARY 2011
NOTE
For other component values, see Table 15-1.
Table 6-5 is a schematic of a headset 4-wire stereo jack with an external FET. Table 6-5 lists the output
characteristics of this configuration.
Figure 6-8. Headset 4-Wire Stereo Jack With an External FET
Table 6-5. Output Characteristics of a Headset 4-Wire Stereo Jack With an External FET
Parameter Test Conditions Min Typ Max Unit
Rsb Cb < 200 pF 0 Ω
Cb = 100 nF 300
Cb = 1 μF 500
Rb + Rsb 2.2 2.7 kΩ
Cs 22 47 μF
The input capacitors and output resistors form a HPF with
the corner frequency = 1/(2πR
out
/Cs)
R
L
C
L
Rs required to ensure HS amplifier stability and no 16 Ω <2 nF 10 Ω
distortion caused by the parasitic diode of the external
24 Ω 15
FET
32 Ω 20
16 Ω 3 nF 12
24 Ω 20
32 Ω 24
16 Ω 4 nF 16
24 Ω 24
32 Ω 32
16 Ω 5 nF 20
24 Ω 28
32 Ω 36
Copyright © 2008–2011, Texas Instruments Incorporated Audio/Voice Module 73
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