TPS61165
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SLVS790A –NOVEMBER 2007–REVISED MAY 2010
High Brightness White LED Driver in 2mm x 2mm
QFN and SOT-23 Packages
Check for Samples: TPS61165
The default white LED current is set with the external
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FEATURES
sensor resistor Rset, and the feedback voltage is
regulated to 200mV, as shown in the typical
application. During the operation, the LED current can
be controlled using the 1 wire digital interface (
Easyscale™ protocol) through the CTRL pin.
Alternatively, a pulse width modulation (PWM) signal
can be applied to the CTRL pin through which the
duty cycle determines the feedback reference
voltage. In either digital or PWM mode, the
TPS61165 does not burst the LED current; therefore,
it does not generate audible noises on the output
capacitor. For maximum protection, the device
features integrated open LED protection that disables
the TPS61165 to prevent the output from exceeding
the absolute maximum ratings during open LED
conditions.
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3-V to 18-V Input Voltage Range
38-V Open LED Protection for 10 LEDs
200-mV Reference Voltage With 2% Accuracy
1.2-A Switch FET With 1.2-MHz Switching
Frequency
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Flexible 1 Wire Digital and PWM Brightness
Control
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Built-in Soft Start
Up to 90% Efficiency
2mm × 2mm × 0.8mm 6-pin QFN Package With
Thermal Pad, and SOT-23 Package
APPLICATIONS
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High Brightness LED Lighting
White LED Backlighting for Media Form Factor
Display
The TPS61165 is available in a space -saving 2mm x
2mm OFN package with thermal pad, and SOT-23
package
DESCRIPTION
With
a 40-V rated integrated switch FET, the
TPS61165 is a boost converter that drives up to 10
LEDs in series. The boost converter runs at a
1.2-MHz fixed switching frequency with 1.2-A switch
current limit, and allows for the use of a high
brightness LED in general lighting.
L1
D1
VIN 5V
10 mH
C1
C2
4.7 mF
1 mF
TPS61165
VIN SW
ON/OFF
DIMMING
CONTROL
350 mA
CTRL
FB
Rset
GND
COMP
0.57 W
220nF
L1: TOKO #A915 _Y-100M
C1: Murata GRM188R61A475 K
C2: Murata GRM188R61E105K
D1: ONsemi MBR0540T1
LED : OSRAM LW-W5SM
Figure 1. Typical Application
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
Easyscale is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2010, Texas Instruments Incorporated