Texas Instruments TPS61166-446 Evaluation Board TPS61166EVM-446 TPS61166EVM-446 TPS61166EVM-446 Scheda Tecnica
Codici prodotto
TPS61166EVM-446
1
FEATURES
DESCRIPTION
APPLICATIONS
C1
4.7 F
4.7 F
m
R1
8
8
L1
4.7 H
m
TPS61166
VIN
NC
SW
FB
EN
OUT
VO
VBAT
GND
PWM
V
2.5 V to 6 V
in
15 kHz / 50% duty cycle
C2
4.7 F
4.7 F
m
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SLVS991 – SEPTEMBER 2009
WHITE LED DRIVER WITH INTEGRATED POWER DIODE AND FAST BURST MODE
DIMMING
•
IC Supply Range: 2.5-V to 6-V
•
Power Stage Input Range: 4.5-V to 10-V
The TPS61166 is a boost converter with a 20-V rated
integrated switch FET and power diode that drives up
integrated switch FET and power diode that drives up
•
Integrated 1.1-A / 20-V Internal Switch FET and
to 5 LEDs in series. This device integrates a high
Power Diode
side switch FET that can turn on/off the LED current
•
Drive up to 5 LEDs in Series
within 1-
µ
s of the applied external PWM signal. The
•
Fast on/off LED Current Within 1-
µ
s in
high
side
switch
also
provides
input-to-output
isolation during IC shutdown.
Brightness Dimming
•
Burst PWM Dimming Method With Frequency
The default white LED current is set with the external
Range From 60-Hz to 40-kHz
sensor resistor R1, and the feedback voltage is
regulated to 200-mV, as shown in the typical
regulated to 200-mV, as shown in the typical
•
Built-in Soft Start-up
application circuit. The LED current can be adjusted
•
Over Load Protection
using a pulse width modulation (PWM) signal through
•
Over Voltage Protection
the PWM pin. The LED current is synchronized to the
PWM signal. The device does not discharge the
PWM signal. The device does not discharge the
•
2.5 × 2.5 × 0.8 mm SON Package
output
ceramic
capacitor
during
dimming,
thus
reducing audible noise when dimming.
Separating the IC input (VIN pin) and power stage
•
Small Form Factor LCD Backlight
input (VBAT pin) makes the device flexible enough to
•
Mobile Phone
support single- or two-cell Li-ion battery applications.
•
Digital Camera
Other protection features include 1.1-A peak-to-peak
•
Personal Camcorder
over current protection (OCP), over voltage protection
•
Single Lens Reflex
(OVP), over load protection (OLP), and thermal
shutdown. The TPS61166 is available in a 2.5 mm ×
2.5 mm SON package with thermal pad.
shutdown. The TPS61166 is available in a 2.5 mm ×
2.5 mm SON package with thermal pad.
Figure 1. Single Cell Li-Ion Battery Typical Application
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.
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009, 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.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.