TPS61150 Datasheet, PDF (1/26 Pages) Texas Instruments – DUAL OUTPUT BOOST WLED DRIVER USING SINGLE INDUCTOR

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TPS61150, TPS61151
SLVS625E – FEBRUARY 2006 – REVISED NOVEMBER 2015
TPS6115x Dual-Output Boost WLED Driver Using Single Inductor
1 Features
•1 2.5-V to 6-V Input Voltage Range
• Two Outputs Each up to 27 V
• 0.7-A Integrated Switch
• Built-In Power Diode
• 1.2-MHz Fixed PWM Frequency
• Individually Programmable Output Current
• Input-to-Output Isolation
• Built-In Soft Start
• Overvoltage Protection
• Up to 83% Efficiency
• Up to 30-kHz PWM Dimming Frequency
2 Applications
• Sub- and Main-Display Backlight in Clamshell
Phones
• Display and Keypad Backlight
• Up to 14-WLED Driver
3 Description
The TPS6115x is a high-frequency boost converter
with two regulated current outputs for driving WLEDs.
Each current output can be individually programmed
through external resistors. There is a dedicated
selection pin for each output so the two outputs can
be turned on separately or simultaneously. The
output current can be reduced by a pulse width
modulation (PWM) signal on SEL pins or an analog
voltage on the ISET pins, resulting in PWM dimming
of the WLEDs. The boost regulator runs at a 1.2-MHz
fixed switching frequency to reduce output ripple and
avoid audible noises associated with pulse frequency
modulation (PFM) control.
The two current outputs are ideal for driving WLED
backlights for the sub and main displays in clamshell
phones. The two outputs can also be used for driving
display and keypad backlights. When used together,
the two outputs can drive up to 14 WLEDs for one
large display.
In addition to the small inductor, small capacitor, and
3-mm × 3-mm VSON package, the built-in MOSFET
and diode eliminate the need for any external power
devices. Overall, the device provides an extremely
compact solution with high efficiency and plenty of
flexibility.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61150
TPS61151
VSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2.5 V to 6 V
Input
Typical Application
L1 10 μH
C1
1 μF
VIN ^SW IOUT
GND
SEL1
SEL2
IFB1
IFB2
ISET1 ISET2
C2
1 μF
R1
R2
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.