TPS65138_16 datasheet(7/22 Pages) TI1

Part #	TPS65138

Description	Dual output AMOLED Display Power Supply

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V

50 mV/Div

POS

400 ns/div

SW

5 V/Div

BOOST

V

5 V/Div

BUCKBOOST

V

50 mV/Div

NEG

V

50 mV/Div

POS

400 ns/div

SW

5 V/Div

BOOST

SW

5 V/Div

BUCKBOOST

V

50 mV/Div

NEG

0

10

20

30

40

50

60

70

80

90

100

0.00

0.05

0.15

0.20

0.30

0.35

I

(A)

OUT

Inductor :

XFL402-4.7 H

m

V

I = 4.2 V

V

I = 3.7 V

V

I = 3.2 V

V

I = 2.9 V

0.10

0.25

V

2 V/Div

POS

2 ms/div

V

5 V/Div

NEG

I

200 mA/Div

IN

TPS65138

TPS65138A

www.ti.com

SLVSAV3C – APRIL 2011 – REVISED MAY 2012

Table 1. TABLE OF GRAPHS

TITLE

TEST CONDITIONS

FIGURE

Efficiency versus Output current

VPOS 4.62 V, VNEG -4.9 V

Figure 1

(Output current is from VPOS to VNEG.)

Start-up

Figure 2

IOUT 100 mA, Boost and BuckBoost

Figure 3

IOUT 300 mA, Boost and BuckBoost

Figure 4

Switch pins and output waveforms

IOUT 300 mA, Boost

Figure 5

IOUT 300 mA, BuckBoost

Figure 6

TYPICAL CHARACTERISTICS

Efficiency vs Output Current

(VPOS 4.62 V, VNEG -4.9 V)

Start up

Figure 1.

Figure 2.

Switch Pins and Outputs

Boost and BuckBoost , IOUT 100 mA

Boost and BuckBoost, IOUT 300 mA

Figure 3.

Figure 4.

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