TPS61253 Datasheet, PDF (24/34 Pages) Texas Instruments – 3.5-MHz HIGH EFFICIENCY STEP-UP CONVERTER IN CHIP SCALE PACKAGING

TPS61253, TPS61254, TPS61256, TPS61258
SLVSAG8B – SEPTEMBER 2011 – REVISED MAY 2012
TYPICAL APPLICATION
www.ti.com
V_IN
2.65 V .. 4.35 V
4.7 μF
L
1 μH
TPS61254
SW
VOUT
VIN
BP
EN
GND
4.5 V / V_IN
EN HP
10 uF
EN DC/DC
Audio Input
Audio Input
EN IHF
CLASS-D APA
Audio Input
Audio Input
EN HP
CLASS-AB APA
AUDIO AMPLIFIER (HANDS-FREE, HEADPHONE)
Figure 38. Combined Audio Amplifier Power Supply
V_IN
3.3 V .. 4.8 V
4.7 μF
L
1 μH
TPS61256
SW
VOUT
VIN
BP
EN
GND
10 uF
5.0 V, up to 750mA
Audio Input
Audio Input
Class-D APA
EN
EN DC/DC
Figure 39. "Boosted" Audio Power Supply
EN APA
V_IN
3.3 V .. 4.35 V
10 μF
L
1 μH
TPS61253
SW
VOUT
VIN
BP
EN
GND
EN DC/DC
5 V, up to 1500mA
Audio Input L
Audio Input L
EN APA
CLASS-D APA
10 uF (x2)
Audio Input R
Audio Input R
EN APA
CLASS-D APA
HIGH-POWER CLASS-D AUDIO AMPLIFIER
Figure 40. "Boosted" Stereo Audio Power Supply
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