TPS65631 Datasheet, PDF (1/25 Pages) Texas Instruments – Dual-Output AMOLED Display Power Supply

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TPS65631
SLVSBK1E – SEPTEMBER 2012 – REVISED MAY 2014
TPS65631 Dual-Output AMOLED Display Power Supply
1 Features
•1 2.9-V to 4.5-V Input Voltage Range
• Fixed 4.6-V Positive Output Voltage
• 0.5% V_POS Accuracy from 25ºC to 85ºC
• Separate V_POS Output Sense Pin
• Negative Output Voltage Digitally Programmable
from –1.4 V to –4.4 V (–4 V Default)
• Output Currents up to 250 mA Supported
• Excellent Line Transient Regulation
• Short-Circuit Protection
• Thermal Shutdown
• Available in 3.00-mm × 3.00-mm, 12-Pin QFN
Package
2 Applications
AMOLED Displays
3 Description
The TPS65631 is designed to drive AMOLED (Active
Matrix Organic Light Emitting Diode) displays
requiring positive and negative supply rails. The
device integrates a boost converter for V_POS and an
inverting buck boost converter for V_NEG and is
suitable for battery-operated products. The digital
control pin (CTRL) allows programming the negative
output voltage in digital steps. The TPS65631 uses a
novel technology enabling excellent line transient
performance.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65631
QFN (12)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet
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4 Simplified Schematic
L1
4.7 µH
VI
2.9 V to 4.5 V
EN / Program VNEG
C1
2×10 µF
C4
100 nF
PVIN
SWP
AVIN
OUTP
FBS
TPS65631
CTRL
OUTN
CT
PGND
AGND
GND
SWN
C2
10 µF
VPOS
4.6 V, 300 mA
VNEG
±4.0 V, 300 mA
C3
2×10 µF
L2
4.7 µH
Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
10
V_POS = 4.6 V
V_NEG = –4.0 V
0
0
50
100
150
200
Output Current (mA)
V_I = 3.7 V
250
300
G000
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.