LED Driver With Integrated Overvoltage and Short-Circuit Protection
2.7-V to 6-V Input Voltage Range
500-mV/250-mV Feedback Voltage
TPS61060 Powers Up to 3 LEDs
TPS61061 Powers Up to 4 LEDs
TPS61062 Powers Up to 5 LEDs
PWM Brightness Control on Enable
Digital Brightness Control on ILED
1-MHz Fixed Switching Frequency
400-mA Internal Power MOSFET Switch
LEDs Disconnected During Shutdown
Operates With Small-Output Capacitors Down to 220 nF
Up to 80% Efficiency
8-Pin NanoFree Package (Chipscale, CSP)
3 × 3-mm QFN Package
APPLICATIONS
White LED Driver
Cellular Phones
PDA, Pocket PC, and Smart Phones
Digital Still Camera
Handheld Devices
PowerPAD is a trademark of Texas Instruments. NanoFree is a registered trademark of Texas Instruments.
Description
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 for the use of 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.
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
Inventory
Reported Distributor Inventory as of 10:01 AM GMT, 06 Nov 2009
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.