Datasheet

TPS65930/TPS65920
SWCS037G–MAY 2008– REVISED APRIL 2011 www.ti.com
Table 14-1. TPS65920/TPS65930 External Components (continued)
Function Component Reference Value Note Link
Capacitor C
MM.M
100 nF
Capacitor C
MM.P
100 nF
Capacitor C
MM.O
47 pF
MIC main
(pseudo Figure 6-6
Resistor R
MM.O
~500 Ω
differential mode)
Resistor R
MM.MP
~1.7 kΩ
If greater than 200 pF, a serial resistor is
Capacitor C
MM.B
0 to 200 pF
required for bias stability
Capacitor C
MM.M
100 nF
Capacitor C
MM.P
100 nF
Capacitor C
MM.PM
47 pF
Capacitor C
MM.O
47 pF
MIC main Capacitor C
MM.GM
47 pF
Figure 6-7
(differential mode)
Capacitor C
MM.GP
47 pF
Resistor R
MM.BP
1 kΩ
Resistor R
MM.GM
1 kΩ
If greater than 200 pF, a serial resistor is
Capacitor C
MM.B
0 to 200 pF
required for bias stability
Range: 0.3 μF to 3.3 μF
VMIC1 Capacitor C
VMIC1.OUT
1 μF ESR min = 20 mΩ
ESR max = 600 mΩ
Capacitor C
SM
1 μF
Capacitor C
SM.P
100 nF
Silicon MIC Capacitor C
SM.M
100 nF Figure 6-8
Capacitor C
SM.PG
47 nF
Resistor R
SM
>500 Ω
Capacitor C
AUXR
100 nF
Auxiliary right Figure 6-9
Capacitor C
AUXR.M
47 pF
LED Driver
Resistor R
LED.A
120 Ω Needed for each LED
LED Figure 9-1
Resistor R
LED.B
160 kΩ Needed for each LED
I
2
C Bus—External Pullup
I
2
C SmartReflex Resistor R
PSR.SDA
Pullups for various bus capacitances (C
L
) and I
2
C speeds
(Std, Fast, and HS)
Resistor R
PSR.SCL
If C
L
= 10 pF: Std = 118 kΩ, Fast = 35.4 kΩ, HS = 4.7 kΩ
I
2
C control Resistor R
CNTL.SD;
If C
L
= 12 pF: Std = 98.3 kΩ, Fast = 29.5 kΩ, HS = 3.9 kΩ
If C
L
= 50 pF: Std = 23.6 kΩ, Fast = 7.1 kΩ, HS = 940 Ω
Section 12.3
If C
L
= 100 pF: Std = 11.8 kΩ, Fast = 3.54 kΩ, HS = 470 Ω
If C
L
≤ 12 pF, there is no need for an external pullup, the
Resistor R
CNTL.SCL
internal 3-kΩ pullup can be used.
If an external pullup is used, disable the internal 3-kΩ pullup
(reference the GPPUPDCTR1 register; see the TRM).
106 External Components Copyright © 2008–2011, Texas Instruments Incorporated
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