TPS61193 Datasheet, PDF (1/33 Pages) Texas Instruments – High-Performance 3-Channel LED Driver

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TPS61193 High-Performance 3-Channel LED Driver
TPS61193
SNVSAF4 – OCTOBER 2015
1 Features
•1 Input Voltage Operating Range 4.5 V to 40 V
• Three High-Precision Current Sinks
– Current Matching 1% (typical)
– Output Current up to 100 mA per Channel
– Outputs can be combined externally for higher
current per string
• High Dimming Ratio 10 000:1 at 200 Hz
• Integrated DC-DC for LED String Power
– Boost and SEPIC modes supported
– Output Voltage up to 45 V
– Switching Frequency 300 kHz to 2.2 MHz
• EMI Minimization
– DC-DC Synchronization Input
– Spread Spectrum Option
• Extensive Fault Detection Features
– Fault Output
– Input Voltage OVP and UVLO
– Open and Shorted LED Fault Detection
– Thermal Shutdown
• Minimum Number of External Components
2 Applications
Industrial Backlighting Systems in Control Panels
and Test & Measurement Equipment
Simplified Schematic
VIN 4.5...40 V
L1
CIN
D1
VOUT up to 45 V
COUT
SW
R2
R1
BRIGHTNESS
EN
VIN
CLDO
RFSET
LDO
TPS61193
FSET
SYNC
PWM
VDDIO/EN
FAULT
FB
OUT1
OUT2
OUT3
ISET
PGND GND PAD
CFB
Up to 100 mA/string
RISET
3 Description
The TPS61193 is a high-efficiency, low-EMI, easy-to-
use LED driver with flexibility to support a wide range
of applications. It has three high-precision current
sinks that can be combined for higher current
capability per string. The device provides high
dimming ratio 10 000:1 for up to 200 Hz input PWM
frequency.
The TPS61193 has an integrated DC-DC supporting
both boost and SEPIC mode operation. The converter
has adaptive output voltage control based on the LED
current sink headroom voltages. This feature
minimizes the power consumption by adjusting the
voltage to lowest sufficient level in all conditions. For
EMI control the DC-DC converter supports spread
spectrum for switching frequency and an external
synchronization with dedicated pin.
The TPS61193 has wide input voltage range from 4.5
V to 40 V for robust support of different types of
applications. The TPS61193 integrates extensive
fault detection features.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61193
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
space
100
95
90
85
80
75
70
65
60
55
50
0
System Efficiency
VIN=5V
VIN=8V
VIN=12V
VIN=16V
10 20 30 40 50 60 70 80 90 100
Brightness (%)
D001
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.