Texas Instruments TPS61166-446 Evaluation Board TPS61166EVM-446 TPS61166EVM-446 TPS61166EVM-446 用户手册
产品代码
TPS61166EVM-446
1
Introduction
1.1
Description
1.2
Applications
1.3
Features
Introduction
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The TPS61166 is a boost converter with a 20-V rated integrated switch FET and power diode that drives
up to 5 LEDs in series. This device integrates a high side switch FET that can turn on/off the LED current
within 1-
up to 5 LEDs in series. This device integrates a high side switch FET that can turn on/off the LED current
within 1-
µ
s of the applied external PWM signal. The high side switch also provides input-to-output isolation
during IC shutdown.
The default white LED current is set with the external sensor resistor R1, and the feedback voltage is
regulated to 200-mV, as shown in the typical application circuit. The LED current can be adjusted using a
pulse width modulation (PWM) signal through the PWM pin. The LED current is synchronized to the PWM
signal. The device does not discharge the output ceramic capacitor during dimming, thus reducing audible
noise when dimming.
regulated to 200-mV, as shown in the typical application circuit. The LED current can be adjusted using a
pulse width modulation (PWM) signal through the PWM pin. The LED current is synchronized to the PWM
signal. The device does not discharge the output ceramic capacitor during dimming, thus reducing audible
noise when dimming.
Separating the IC input (VIN pin) and power stage input (VBAT pin) makes the device flexible enough to
support single- or two-cell Li-ion battery applications. Other protection features include 1.1-A peak-to-peak
over current protection (OCP), over voltage protection (OVP), over load protection (OLP), and thermal
shutdown. The TPS61166 is available in a 2.5 mm
support single- or two-cell Li-ion battery applications. Other protection features include 1.1-A peak-to-peak
over current protection (OCP), over voltage protection (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.
•
Small Form Factor LCD Backlight
•
Mobile Phone
•
Digital Camera
•
Personal Camcorder
•
Single Lens Reflex
•
IC Supply Range: 2.5-V to 6-V
•
Power Stage Input Range: 4.5-V to 10-V
•
Integrated 1.1-A / 20-V Internal Switch FET and Power Diode
•
Drive up to 5 LEDs in Series
•
Fast on/off LED Current Within 1-
µ
s in Brightness Dimming
•
Burst PWM Dimming Method With Frequency Range From 60-Hz to 40-kHz
•
Built-in Soft Start-up
•
Over Load Protection
•
Over Voltage Protection
•
2.5
×
2.5
×
0.8 mm SON Package
TPS61166EVM-446 User's Guide
2
SLVU326 – October 2009