TPS61165_10 Datasheet, PDF (1/26 Pages) Texas Instruments – High Brightness White LED Driver in 2mm x 2mm QFN and SOT-23 Packages

TPS61165
www.ti.com
SLVS790A – NOVEMBER 2007 – REVISED MAY 2010
High Brightness White LED Driver in 2mm x 2mm
QFN and SOT-23 Packages
Check for Samples: TPS61165
FEATURES
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•2 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
• Flexible 1 Wire Digital and PWM Brightness
Control
• Built-in Soft Start
• Up to 90% Efficiency
• 2mm × 2mm × 0.8mm 6-pin QFN Package With
Thermal Pad, and SOT-23 Package
APPLICATIONS
• High Brightness LED Lighting
• White LED Backlighting for Media Form Factor
Display
The default white LED current is set with the external
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.
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.
VIN 5V
L1
10 mH
D1
C1
4.7 mF
ON/OFF
DIMMING
CONTROL
220 nF
TPS61165
VIN SW
CTRL FB
COMP GND
C2
1 mF
350 mA
Rset
0.57 W
L 1 : TOKO #A 915 _Y-100M
C1 : Murata GRM 188R61A475 K
C2 : Murata GRM 188R61E105K
D1 : ONsemi MBR0540T1
LED : OSRAM LW-W 5SM
Figure 1. Typical Application
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Easyscale is a trademark of Texas Instruments.
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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