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TPS61062YZFT Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS61062YZFT
Description  CONSTANT CURRENT LED DRIVER WITH DIGITAL AND PWM BRIGHTNESS CONTROL
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS61062YZFT Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
APPLICATIONS
DESCRIPTION
TYPICAL APPLICATION
VIN
EN
GND
SW
FB
OUT
ILED
PGND
VIN
2.7 V to 6 V
C1
1 mF
L1
22 mH
RS
12 W
C2
220 nF
TPS61060
TPS61061
TPS61062
SLVS538 – NOVEMBER 2004
CONSTANT CURRENT LED DRIVER WITH DIGITAL AND PWM BRIGHTNESS CONTROL
Up to 80% Efficiency
LED Driver With Integrated Overvoltage and
8-Pin NanoFree™Package (Chipscale, CSP)
Short-Circuit Protection
3
× 3-mm QFN Package
2.7-V to 6.0-V Input Voltage Range
500-mV/250-mV Feedback Voltage
White LED Driver
TPS61060 Powers Up to 3 LEDs
Cellular Phones
TPS61061 Powers Up to 4 LEDs
PDA, Pocket PC, and Smart Phones
TPS61062 Powers Up to 5 LEDs
Digital Still Camera
PWM Brightness Control on Enable
Handheld Devices
Digital Brightness Control on ILED
1.0-MHz Fixed Switching Frequency
400-mA Internal Power MOSFET Switch
LEDs Disconnected During Shutdown
Operates With Small-Output Capacitors
Down to 220 nF
The TPS61060/61/62 is a high-frequency, synchronous boost converter with constant current output to drive up
to 5 white LEDs. For maximum safety, the device features integrated overvoltage and an advanced short-circuit
protection when the output is shorted to ground. The device operates with 1-MHz fixed switching frequency to
allow small external components and to simplify possible EMI problems. The device comes with three different
overvoltage protection thresholds (14 V/18 V/23 V) to allow inexpensive and small-output capacitors with lower
voltage ratings. The LED current is initially set with the external sense resistor Rs, and the feedback voltage is
regulated to 500 mV or 250 mV, depending on the ILED pin configuration. Digital brightness control is
implemented by applying a simple digital signal to the ILED pin. Alternatively, a PWM signal up to 1 kHz can be
applied to the enable pin to control the LED brightness. During shutdown, the output is disconnected from the
input to avoid leakage current through the LEDs.
Figure 1.
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.
NanoFree, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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